* [PATCH v2 01/11] copy.c: import copy_file() from busybox
2016-11-28 9:43 ` [PATCH v2 " Nguyễn Thái Ngọc Duy
@ 2016-11-28 9:43 ` Nguyễn Thái Ngọc Duy
2016-11-28 9:43 ` [PATCH v2 02/11] copy.c: delete unused code in copy_file() Nguyễn Thái Ngọc Duy
` (10 subsequent siblings)
11 siblings, 0 replies; 40+ messages in thread
From: Nguyễn Thái Ngọc Duy @ 2016-11-28 9:43 UTC (permalink / raw)
To: git; +Cc: Junio C Hamano, Nguyễn Thái Ngọc Duy
This is busybox's unmodified copy_file() in libbb/copy_file.c from the
GPL2+ commit f2c043acfcf9dad9fd3d65821b81f89986bbe54e (busybox: fix
uninitialized memory when displaying IPv6 addresses -
2016-01-18). This is a no-op commit. More changes are needed before
this new code can compile.
This will be needed for implementing "git worktree move" where we have
to move a directory recursively. We can implement it from scratch, but
then we will have to deal with corner cases (failure to move, circular
symlinks...). And delegating the task to "/bin/mv" takes a way the
ability to clean things up properly when things fail and we may have
to deal with "mv" differences between platforms.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
copy.c | 331 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 331 insertions(+)
diff --git a/copy.c b/copy.c
index 4de6a11..79623ac 100644
--- a/copy.c
+++ b/copy.c
@@ -65,3 +65,334 @@ int copy_file_with_time(const char *dst, const char *src, int mode)
return copy_times(dst, src);
return status;
}
+
+#if 0
+/* Return:
+ * -1 error, copy not made
+ * 0 copy is made or user answered "no" in interactive mode
+ * (failures to preserve mode/owner/times are not reported in exit code)
+ */
+int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
+{
+ /* This is a recursive function, try to minimize stack usage */
+ /* NB: each struct stat is ~100 bytes */
+ struct stat source_stat;
+ struct stat dest_stat;
+ smallint retval = 0;
+ smallint dest_exists = 0;
+ smallint ovr;
+
+/* Inverse of cp -d ("cp without -d") */
+#define FLAGS_DEREF (flags & (FILEUTILS_DEREFERENCE + FILEUTILS_DEREFERENCE_L0))
+
+ if ((FLAGS_DEREF ? stat : lstat)(source, &source_stat) < 0) {
+ /* This may be a dangling symlink.
+ * Making [sym]links to dangling symlinks works, so... */
+ if (flags & (FILEUTILS_MAKE_SOFTLINK|FILEUTILS_MAKE_HARDLINK))
+ goto make_links;
+ bb_perror_msg("can't stat '%s'", source);
+ return -1;
+ }
+
+ if (lstat(dest, &dest_stat) < 0) {
+ if (errno != ENOENT) {
+ bb_perror_msg("can't stat '%s'", dest);
+ return -1;
+ }
+ } else {
+ if (source_stat.st_dev == dest_stat.st_dev
+ && source_stat.st_ino == dest_stat.st_ino
+ ) {
+ bb_error_msg("'%s' and '%s' are the same file", source, dest);
+ return -1;
+ }
+ dest_exists = 1;
+ }
+
+#if ENABLE_SELINUX
+ if ((flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) && is_selinux_enabled() > 0) {
+ security_context_t con;
+ if (lgetfilecon(source, &con) >= 0) {
+ if (setfscreatecon(con) < 0) {
+ bb_perror_msg("can't set setfscreatecon %s", con);
+ freecon(con);
+ return -1;
+ }
+ } else if (errno == ENOTSUP || errno == ENODATA) {
+ setfscreatecon_or_die(NULL);
+ } else {
+ bb_perror_msg("can't lgetfilecon %s", source);
+ return -1;
+ }
+ }
+#endif
+
+ if (S_ISDIR(source_stat.st_mode)) {
+ DIR *dp;
+ const char *tp;
+ struct dirent *d;
+ mode_t saved_umask = 0;
+
+ if (!(flags & FILEUTILS_RECUR)) {
+ bb_error_msg("omitting directory '%s'", source);
+ return -1;
+ }
+
+ /* Did we ever create source ourself before? */
+ tp = is_in_ino_dev_hashtable(&source_stat);
+ if (tp) {
+ /* We did! it's a recursion! man the lifeboats... */
+ bb_error_msg("recursion detected, omitting directory '%s'",
+ source);
+ return -1;
+ }
+
+ if (dest_exists) {
+ if (!S_ISDIR(dest_stat.st_mode)) {
+ bb_error_msg("target '%s' is not a directory", dest);
+ return -1;
+ }
+ /* race here: user can substitute a symlink between
+ * this check and actual creation of files inside dest */
+ } else {
+ /* Create DEST */
+ mode_t mode;
+ saved_umask = umask(0);
+
+ mode = source_stat.st_mode;
+ if (!(flags & FILEUTILS_PRESERVE_STATUS))
+ mode = source_stat.st_mode & ~saved_umask;
+ /* Allow owner to access new dir (at least for now) */
+ mode |= S_IRWXU;
+ if (mkdir(dest, mode) < 0) {
+ umask(saved_umask);
+ bb_perror_msg("can't create directory '%s'", dest);
+ return -1;
+ }
+ umask(saved_umask);
+ /* need stat info for add_to_ino_dev_hashtable */
+ if (lstat(dest, &dest_stat) < 0) {
+ bb_perror_msg("can't stat '%s'", dest);
+ return -1;
+ }
+ }
+ /* remember (dev,inode) of each created dir.
+ * NULL: name is not remembered */
+ add_to_ino_dev_hashtable(&dest_stat, NULL);
+
+ /* Recursively copy files in SOURCE */
+ dp = opendir(source);
+ if (dp == NULL) {
+ retval = -1;
+ goto preserve_mode_ugid_time;
+ }
+
+ while ((d = readdir(dp)) != NULL) {
+ char *new_source, *new_dest;
+
+ new_source = concat_subpath_file(source, d->d_name);
+ if (new_source == NULL)
+ continue;
+ new_dest = concat_path_file(dest, d->d_name);
+ if (copy_file(new_source, new_dest, flags & ~FILEUTILS_DEREFERENCE_L0) < 0)
+ retval = -1;
+ free(new_source);
+ free(new_dest);
+ }
+ closedir(dp);
+
+ if (!dest_exists
+ && chmod(dest, source_stat.st_mode & ~saved_umask) < 0
+ ) {
+ bb_perror_msg("can't preserve %s of '%s'", "permissions", dest);
+ /* retval = -1; - WRONG! copy *WAS* made */
+ }
+ goto preserve_mode_ugid_time;
+ }
+
+ if (flags & (FILEUTILS_MAKE_SOFTLINK|FILEUTILS_MAKE_HARDLINK)) {
+ int (*lf)(const char *oldpath, const char *newpath);
+ make_links:
+ /* Hmm... maybe
+ * if (DEREF && MAKE_SOFTLINK) source = realpath(source) ?
+ * (but realpath returns NULL on dangling symlinks...) */
+ lf = (flags & FILEUTILS_MAKE_SOFTLINK) ? symlink : link;
+ if (lf(source, dest) < 0) {
+ ovr = ask_and_unlink(dest, flags);
+ if (ovr <= 0)
+ return ovr;
+ if (lf(source, dest) < 0) {
+ bb_perror_msg("can't create link '%s'", dest);
+ return -1;
+ }
+ }
+ /* _Not_ jumping to preserve_mode_ugid_time:
+ * (sym)links don't have those */
+ return 0;
+ }
+
+ if (/* "cp thing1 thing2" without -R: just open and read() from thing1 */
+ !(flags & FILEUTILS_RECUR)
+ /* "cp [-opts] regular_file thing2" */
+ || S_ISREG(source_stat.st_mode)
+ /* DEREF uses stat, which never returns S_ISLNK() == true.
+ * So the below is never true: */
+ /* || (FLAGS_DEREF && S_ISLNK(source_stat.st_mode)) */
+ ) {
+ int src_fd;
+ int dst_fd;
+ mode_t new_mode;
+
+ if (!FLAGS_DEREF && S_ISLNK(source_stat.st_mode)) {
+ /* "cp -d symlink dst": create a link */
+ goto dont_cat;
+ }
+
+ if (ENABLE_FEATURE_PRESERVE_HARDLINKS && !FLAGS_DEREF) {
+ const char *link_target;
+ link_target = is_in_ino_dev_hashtable(&source_stat);
+ if (link_target) {
+ if (link(link_target, dest) < 0) {
+ ovr = ask_and_unlink(dest, flags);
+ if (ovr <= 0)
+ return ovr;
+ if (link(link_target, dest) < 0) {
+ bb_perror_msg("can't create link '%s'", dest);
+ return -1;
+ }
+ }
+ return 0;
+ }
+ add_to_ino_dev_hashtable(&source_stat, dest);
+ }
+
+ src_fd = open_or_warn(source, O_RDONLY);
+ if (src_fd < 0)
+ return -1;
+
+ /* Do not try to open with weird mode fields */
+ new_mode = source_stat.st_mode;
+ if (!S_ISREG(source_stat.st_mode))
+ new_mode = 0666;
+
+ // POSIX way is a security problem versus (sym)link attacks
+ if (!ENABLE_FEATURE_NON_POSIX_CP) {
+ dst_fd = open(dest, O_WRONLY|O_CREAT|O_TRUNC, new_mode);
+ } else { /* safe way: */
+ dst_fd = open(dest, O_WRONLY|O_CREAT|O_EXCL, new_mode);
+ }
+ if (dst_fd == -1) {
+ ovr = ask_and_unlink(dest, flags);
+ if (ovr <= 0) {
+ close(src_fd);
+ return ovr;
+ }
+ /* It shouldn't exist. If it exists, do not open (symlink attack?) */
+ dst_fd = open3_or_warn(dest, O_WRONLY|O_CREAT|O_EXCL, new_mode);
+ if (dst_fd < 0) {
+ close(src_fd);
+ return -1;
+ }
+ }
+
+#if ENABLE_SELINUX
+ if ((flags & (FILEUTILS_PRESERVE_SECURITY_CONTEXT|FILEUTILS_SET_SECURITY_CONTEXT))
+ && is_selinux_enabled() > 0
+ ) {
+ security_context_t con;
+ if (getfscreatecon(&con) == -1) {
+ bb_perror_msg("getfscreatecon");
+ return -1;
+ }
+ if (con) {
+ if (setfilecon(dest, con) == -1) {
+ bb_perror_msg("setfilecon:%s,%s", dest, con);
+ freecon(con);
+ return -1;
+ }
+ freecon(con);
+ }
+ }
+#endif
+ if (bb_copyfd_eof(src_fd, dst_fd) == -1)
+ retval = -1;
+ /* Careful with writing... */
+ if (close(dst_fd) < 0) {
+ bb_perror_msg("error writing to '%s'", dest);
+ retval = -1;
+ }
+ /* ...but read size is already checked by bb_copyfd_eof */
+ close(src_fd);
+ /* "cp /dev/something new_file" should not
+ * copy mode of /dev/something */
+ if (!S_ISREG(source_stat.st_mode))
+ return retval;
+ goto preserve_mode_ugid_time;
+ }
+ dont_cat:
+
+ /* Source is a symlink or a special file */
+ /* We are lazy here, a bit lax with races... */
+ if (dest_exists) {
+ errno = EEXIST;
+ ovr = ask_and_unlink(dest, flags);
+ if (ovr <= 0)
+ return ovr;
+ }
+ if (S_ISLNK(source_stat.st_mode)) {
+ char *lpath = xmalloc_readlink_or_warn(source);
+ if (lpath) {
+ int r = symlink(lpath, dest);
+ free(lpath);
+ if (r < 0) {
+ bb_perror_msg("can't create symlink '%s'", dest);
+ return -1;
+ }
+ if (flags & FILEUTILS_PRESERVE_STATUS)
+ if (lchown(dest, source_stat.st_uid, source_stat.st_gid) < 0)
+ bb_perror_msg("can't preserve %s of '%s'", "ownership", dest);
+ }
+ /* _Not_ jumping to preserve_mode_ugid_time:
+ * symlinks don't have those */
+ return 0;
+ }
+ if (S_ISBLK(source_stat.st_mode) || S_ISCHR(source_stat.st_mode)
+ || S_ISSOCK(source_stat.st_mode) || S_ISFIFO(source_stat.st_mode)
+ ) {
+ if (mknod(dest, source_stat.st_mode, source_stat.st_rdev) < 0) {
+ bb_perror_msg("can't create '%s'", dest);
+ return -1;
+ }
+ } else {
+ bb_error_msg("unrecognized file '%s' with mode %x", source, source_stat.st_mode);
+ return -1;
+ }
+
+ preserve_mode_ugid_time:
+
+ if (flags & FILEUTILS_PRESERVE_STATUS
+ /* Cannot happen: */
+ /* && !(flags & (FILEUTILS_MAKE_SOFTLINK|FILEUTILS_MAKE_HARDLINK)) */
+ ) {
+ struct timeval times[2];
+
+ times[1].tv_sec = times[0].tv_sec = source_stat.st_mtime;
+ times[1].tv_usec = times[0].tv_usec = 0;
+ /* BTW, utimes sets usec-precision time - just FYI */
+ if (utimes(dest, times) < 0)
+ bb_perror_msg("can't preserve %s of '%s'", "times", dest);
+ if (chown(dest, source_stat.st_uid, source_stat.st_gid) < 0) {
+ source_stat.st_mode &= ~(S_ISUID | S_ISGID);
+ bb_perror_msg("can't preserve %s of '%s'", "ownership", dest);
+ }
+ if (chmod(dest, source_stat.st_mode) < 0)
+ bb_perror_msg("can't preserve %s of '%s'", "permissions", dest);
+ }
+
+ if (flags & FILEUTILS_VERBOSE) {
+ printf("'%s' -> '%s'\n", source, dest);
+ }
+
+ return retval;
+}
+#endif
--
2.8.2.524.g6ff3d78
^ permalink raw reply related [flat|nested] 40+ messages in thread* [PATCH v2 02/11] copy.c: delete unused code in copy_file()
2016-11-28 9:43 ` [PATCH v2 " Nguyễn Thái Ngọc Duy
2016-11-28 9:43 ` [PATCH v2 01/11] copy.c: import copy_file() from busybox Nguyễn Thái Ngọc Duy
@ 2016-11-28 9:43 ` Nguyễn Thái Ngọc Duy
2016-11-28 9:43 ` [PATCH v2 03/11] copy.c: convert bb_(p)error_msg to error(_errno) Nguyễn Thái Ngọc Duy
` (9 subsequent siblings)
11 siblings, 0 replies; 40+ messages in thread
From: Nguyễn Thái Ngọc Duy @ 2016-11-28 9:43 UTC (permalink / raw)
To: git; +Cc: Junio C Hamano, Nguyễn Thái Ngọc Duy
- selinux preservation code
- make-link code
- delete link dereference code
- non-recursive copy code
- stat no preservation code
- verbose printing code
Some of these are "cp" features that we don't need (for "git worktree
move"). Some do not make sense in source-control context (SELinux).
Some probably need a reimplementation to better fit in (verbose
printing code).
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
copy.c | 101 +++++------------------------------------------------------------
1 file changed, 7 insertions(+), 94 deletions(-)
diff --git a/copy.c b/copy.c
index 79623ac..b7a87f1 100644
--- a/copy.c
+++ b/copy.c
@@ -82,14 +82,7 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
smallint dest_exists = 0;
smallint ovr;
-/* Inverse of cp -d ("cp without -d") */
-#define FLAGS_DEREF (flags & (FILEUTILS_DEREFERENCE + FILEUTILS_DEREFERENCE_L0))
-
- if ((FLAGS_DEREF ? stat : lstat)(source, &source_stat) < 0) {
- /* This may be a dangling symlink.
- * Making [sym]links to dangling symlinks works, so... */
- if (flags & (FILEUTILS_MAKE_SOFTLINK|FILEUTILS_MAKE_HARDLINK))
- goto make_links;
+ if (lstat(source, &source_stat) < 0) {
bb_perror_msg("can't stat '%s'", source);
return -1;
}
@@ -109,35 +102,12 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
dest_exists = 1;
}
-#if ENABLE_SELINUX
- if ((flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) && is_selinux_enabled() > 0) {
- security_context_t con;
- if (lgetfilecon(source, &con) >= 0) {
- if (setfscreatecon(con) < 0) {
- bb_perror_msg("can't set setfscreatecon %s", con);
- freecon(con);
- return -1;
- }
- } else if (errno == ENOTSUP || errno == ENODATA) {
- setfscreatecon_or_die(NULL);
- } else {
- bb_perror_msg("can't lgetfilecon %s", source);
- return -1;
- }
- }
-#endif
-
if (S_ISDIR(source_stat.st_mode)) {
DIR *dp;
const char *tp;
struct dirent *d;
mode_t saved_umask = 0;
- if (!(flags & FILEUTILS_RECUR)) {
- bb_error_msg("omitting directory '%s'", source);
- return -1;
- }
-
/* Did we ever create source ourself before? */
tp = is_in_ino_dev_hashtable(&source_stat);
if (tp) {
@@ -160,8 +130,6 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
saved_umask = umask(0);
mode = source_stat.st_mode;
- if (!(flags & FILEUTILS_PRESERVE_STATUS))
- mode = source_stat.st_mode & ~saved_umask;
/* Allow owner to access new dir (at least for now) */
mode |= S_IRWXU;
if (mkdir(dest, mode) < 0) {
@@ -210,45 +178,17 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
goto preserve_mode_ugid_time;
}
- if (flags & (FILEUTILS_MAKE_SOFTLINK|FILEUTILS_MAKE_HARDLINK)) {
- int (*lf)(const char *oldpath, const char *newpath);
- make_links:
- /* Hmm... maybe
- * if (DEREF && MAKE_SOFTLINK) source = realpath(source) ?
- * (but realpath returns NULL on dangling symlinks...) */
- lf = (flags & FILEUTILS_MAKE_SOFTLINK) ? symlink : link;
- if (lf(source, dest) < 0) {
- ovr = ask_and_unlink(dest, flags);
- if (ovr <= 0)
- return ovr;
- if (lf(source, dest) < 0) {
- bb_perror_msg("can't create link '%s'", dest);
- return -1;
- }
- }
- /* _Not_ jumping to preserve_mode_ugid_time:
- * (sym)links don't have those */
- return 0;
- }
-
- if (/* "cp thing1 thing2" without -R: just open and read() from thing1 */
- !(flags & FILEUTILS_RECUR)
- /* "cp [-opts] regular_file thing2" */
- || S_ISREG(source_stat.st_mode)
- /* DEREF uses stat, which never returns S_ISLNK() == true.
- * So the below is never true: */
- /* || (FLAGS_DEREF && S_ISLNK(source_stat.st_mode)) */
- ) {
+ if (S_ISREG(source_stat.st_mode) ) { /* "cp [-opts] regular_file thing2" */
int src_fd;
int dst_fd;
mode_t new_mode;
- if (!FLAGS_DEREF && S_ISLNK(source_stat.st_mode)) {
+ if (S_ISLNK(source_stat.st_mode)) {
/* "cp -d symlink dst": create a link */
goto dont_cat;
}
- if (ENABLE_FEATURE_PRESERVE_HARDLINKS && !FLAGS_DEREF) {
+ if (ENABLE_FEATURE_PRESERVE_HARDLINKS) {
const char *link_target;
link_target = is_in_ino_dev_hashtable(&source_stat);
if (link_target) {
@@ -295,25 +235,6 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
}
}
-#if ENABLE_SELINUX
- if ((flags & (FILEUTILS_PRESERVE_SECURITY_CONTEXT|FILEUTILS_SET_SECURITY_CONTEXT))
- && is_selinux_enabled() > 0
- ) {
- security_context_t con;
- if (getfscreatecon(&con) == -1) {
- bb_perror_msg("getfscreatecon");
- return -1;
- }
- if (con) {
- if (setfilecon(dest, con) == -1) {
- bb_perror_msg("setfilecon:%s,%s", dest, con);
- freecon(con);
- return -1;
- }
- freecon(con);
- }
- }
-#endif
if (bb_copyfd_eof(src_fd, dst_fd) == -1)
retval = -1;
/* Careful with writing... */
@@ -348,9 +269,8 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
bb_perror_msg("can't create symlink '%s'", dest);
return -1;
}
- if (flags & FILEUTILS_PRESERVE_STATUS)
- if (lchown(dest, source_stat.st_uid, source_stat.st_gid) < 0)
- bb_perror_msg("can't preserve %s of '%s'", "ownership", dest);
+ if (lchown(dest, source_stat.st_uid, source_stat.st_gid) < 0)
+ bb_perror_msg("can't preserve %s of '%s'", "ownership", dest);
}
/* _Not_ jumping to preserve_mode_ugid_time:
* symlinks don't have those */
@@ -370,10 +290,7 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
preserve_mode_ugid_time:
- if (flags & FILEUTILS_PRESERVE_STATUS
- /* Cannot happen: */
- /* && !(flags & (FILEUTILS_MAKE_SOFTLINK|FILEUTILS_MAKE_HARDLINK)) */
- ) {
+ if (1 /*FILEUTILS_PRESERVE_STATUS*/) {
struct timeval times[2];
times[1].tv_sec = times[0].tv_sec = source_stat.st_mtime;
@@ -389,10 +306,6 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
bb_perror_msg("can't preserve %s of '%s'", "permissions", dest);
}
- if (flags & FILEUTILS_VERBOSE) {
- printf("'%s' -> '%s'\n", source, dest);
- }
-
return retval;
}
#endif
--
2.8.2.524.g6ff3d78
^ permalink raw reply related [flat|nested] 40+ messages in thread* [PATCH v2 03/11] copy.c: convert bb_(p)error_msg to error(_errno)
2016-11-28 9:43 ` [PATCH v2 " Nguyễn Thái Ngọc Duy
2016-11-28 9:43 ` [PATCH v2 01/11] copy.c: import copy_file() from busybox Nguyễn Thái Ngọc Duy
2016-11-28 9:43 ` [PATCH v2 02/11] copy.c: delete unused code in copy_file() Nguyễn Thái Ngọc Duy
@ 2016-11-28 9:43 ` Nguyễn Thái Ngọc Duy
2016-11-28 9:43 ` [PATCH v2 04/11] copy.c: style fix Nguyễn Thái Ngọc Duy
` (8 subsequent siblings)
11 siblings, 0 replies; 40+ messages in thread
From: Nguyễn Thái Ngọc Duy @ 2016-11-28 9:43 UTC (permalink / raw)
To: git; +Cc: Junio C Hamano, Nguyễn Thái Ngọc Duy
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
copy.c | 85 ++++++++++++++++++++++++------------------------------------------
1 file changed, 31 insertions(+), 54 deletions(-)
diff --git a/copy.c b/copy.c
index b7a87f1..074b609 100644
--- a/copy.c
+++ b/copy.c
@@ -82,23 +82,16 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
smallint dest_exists = 0;
smallint ovr;
- if (lstat(source, &source_stat) < 0) {
- bb_perror_msg("can't stat '%s'", source);
- return -1;
- }
+ if (lstat(source, &source_stat) < 0)
+ return error_errno(_("can't stat '%s'"), source);
if (lstat(dest, &dest_stat) < 0) {
- if (errno != ENOENT) {
- bb_perror_msg("can't stat '%s'", dest);
- return -1;
- }
+ if (errno != ENOENT)
+ return error_errno(_("can't stat '%s'"), dest);
} else {
- if (source_stat.st_dev == dest_stat.st_dev
- && source_stat.st_ino == dest_stat.st_ino
- ) {
- bb_error_msg("'%s' and '%s' are the same file", source, dest);
- return -1;
- }
+ if (source_stat.st_dev == dest_stat.st_dev &&
+ source_stat.st_ino == dest_stat.st_ino)
+ return error(_("'%s' and '%s' are the same file"), source, dest);
dest_exists = 1;
}
@@ -110,18 +103,14 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
/* Did we ever create source ourself before? */
tp = is_in_ino_dev_hashtable(&source_stat);
- if (tp) {
+ if (tp)
/* We did! it's a recursion! man the lifeboats... */
- bb_error_msg("recursion detected, omitting directory '%s'",
- source);
- return -1;
- }
+ return error(_("recursion detected, omitting directory '%s'"),
+ source);
if (dest_exists) {
- if (!S_ISDIR(dest_stat.st_mode)) {
- bb_error_msg("target '%s' is not a directory", dest);
- return -1;
- }
+ if (!S_ISDIR(dest_stat.st_mode))
+ return error(_("target '%s' is not a directory"), dest);
/* race here: user can substitute a symlink between
* this check and actual creation of files inside dest */
} else {
@@ -134,15 +123,12 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
mode |= S_IRWXU;
if (mkdir(dest, mode) < 0) {
umask(saved_umask);
- bb_perror_msg("can't create directory '%s'", dest);
- return -1;
+ return error_errno(_("can't create directory '%s'"), dest);
}
umask(saved_umask);
/* need stat info for add_to_ino_dev_hashtable */
- if (lstat(dest, &dest_stat) < 0) {
- bb_perror_msg("can't stat '%s'", dest);
- return -1;
- }
+ if (lstat(dest, &dest_stat) < 0)
+ return error_errno(_("can't stat '%s'"), dest);
}
/* remember (dev,inode) of each created dir.
* NULL: name is not remembered */
@@ -172,7 +158,7 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
if (!dest_exists
&& chmod(dest, source_stat.st_mode & ~saved_umask) < 0
) {
- bb_perror_msg("can't preserve %s of '%s'", "permissions", dest);
+ error_errno(_("can't preserve permissions of '%s'"), dest);
/* retval = -1; - WRONG! copy *WAS* made */
}
goto preserve_mode_ugid_time;
@@ -196,10 +182,8 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
ovr = ask_and_unlink(dest, flags);
if (ovr <= 0)
return ovr;
- if (link(link_target, dest) < 0) {
- bb_perror_msg("can't create link '%s'", dest);
- return -1;
- }
+ if (link(link_target, dest) < 0)
+ return error_errno(_("can't create link '%s'"), dest);
}
return 0;
}
@@ -238,10 +222,8 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
if (bb_copyfd_eof(src_fd, dst_fd) == -1)
retval = -1;
/* Careful with writing... */
- if (close(dst_fd) < 0) {
- bb_perror_msg("error writing to '%s'", dest);
- retval = -1;
- }
+ if (close(dst_fd) < 0)
+ retval = error_errno(_("error writing to '%s'"), dest);
/* ...but read size is already checked by bb_copyfd_eof */
close(src_fd);
/* "cp /dev/something new_file" should not
@@ -265,12 +247,10 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
if (lpath) {
int r = symlink(lpath, dest);
free(lpath);
- if (r < 0) {
- bb_perror_msg("can't create symlink '%s'", dest);
- return -1;
- }
+ if (r < 0)
+ return error_errno(_("can't create symlink '%s'"), dest);
if (lchown(dest, source_stat.st_uid, source_stat.st_gid) < 0)
- bb_perror_msg("can't preserve %s of '%s'", "ownership", dest);
+ error_errno(_("can't preserve %s of '%s'"), "ownership", dest);
}
/* _Not_ jumping to preserve_mode_ugid_time:
* symlinks don't have those */
@@ -279,14 +259,11 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
if (S_ISBLK(source_stat.st_mode) || S_ISCHR(source_stat.st_mode)
|| S_ISSOCK(source_stat.st_mode) || S_ISFIFO(source_stat.st_mode)
) {
- if (mknod(dest, source_stat.st_mode, source_stat.st_rdev) < 0) {
- bb_perror_msg("can't create '%s'", dest);
- return -1;
- }
- } else {
- bb_error_msg("unrecognized file '%s' with mode %x", source, source_stat.st_mode);
- return -1;
- }
+ if (mknod(dest, source_stat.st_mode, source_stat.st_rdev) < 0)
+ return error_errno(_("can't create '%s'"), dest);
+ } else
+ return error(_("unrecognized file '%s' with mode %x"),
+ source, source_stat.st_mode);
preserve_mode_ugid_time:
@@ -297,13 +274,13 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
times[1].tv_usec = times[0].tv_usec = 0;
/* BTW, utimes sets usec-precision time - just FYI */
if (utimes(dest, times) < 0)
- bb_perror_msg("can't preserve %s of '%s'", "times", dest);
+ error_errno(_("can't preserve %s of '%s'"), "times", dest);
if (chown(dest, source_stat.st_uid, source_stat.st_gid) < 0) {
source_stat.st_mode &= ~(S_ISUID | S_ISGID);
- bb_perror_msg("can't preserve %s of '%s'", "ownership", dest);
+ error_errno(_("can't preserve %s of '%s'"), "ownership", dest);
}
if (chmod(dest, source_stat.st_mode) < 0)
- bb_perror_msg("can't preserve %s of '%s'", "permissions", dest);
+ error_errno(_("can't preserve %s of '%s'"), "permissions", dest);
}
return retval;
--
2.8.2.524.g6ff3d78
^ permalink raw reply related [flat|nested] 40+ messages in thread* [PATCH v2 04/11] copy.c: style fix
2016-11-28 9:43 ` [PATCH v2 " Nguyễn Thái Ngọc Duy
` (2 preceding siblings ...)
2016-11-28 9:43 ` [PATCH v2 03/11] copy.c: convert bb_(p)error_msg to error(_errno) Nguyễn Thái Ngọc Duy
@ 2016-11-28 9:43 ` Nguyễn Thái Ngọc Duy
2016-11-28 9:43 ` [PATCH v2 05/11] copy.c: convert copy_file() to copy_dir_recursively() Nguyễn Thái Ngọc Duy
` (7 subsequent siblings)
11 siblings, 0 replies; 40+ messages in thread
From: Nguyễn Thái Ngọc Duy @ 2016-11-28 9:43 UTC (permalink / raw)
To: git; +Cc: Junio C Hamano, Nguyễn Thái Ngọc Duy
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
copy.c | 50 +++++++++++++++++++++++++++++---------------------
1 file changed, 29 insertions(+), 21 deletions(-)
diff --git a/copy.c b/copy.c
index 074b609..60c7d8a 100644
--- a/copy.c
+++ b/copy.c
@@ -111,8 +111,10 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
if (dest_exists) {
if (!S_ISDIR(dest_stat.st_mode))
return error(_("target '%s' is not a directory"), dest);
- /* race here: user can substitute a symlink between
- * this check and actual creation of files inside dest */
+ /*
+ * race here: user can substitute a symlink between
+ * this check and actual creation of files inside dest
+ */
} else {
/* Create DEST */
mode_t mode;
@@ -130,22 +132,24 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
if (lstat(dest, &dest_stat) < 0)
return error_errno(_("can't stat '%s'"), dest);
}
- /* remember (dev,inode) of each created dir.
- * NULL: name is not remembered */
+ /*
+ * remember (dev,inode) of each created dir. name is
+ * not remembered
+ */
add_to_ino_dev_hashtable(&dest_stat, NULL);
/* Recursively copy files in SOURCE */
dp = opendir(source);
- if (dp == NULL) {
+ if (!dp) {
retval = -1;
goto preserve_mode_ugid_time;
}
- while ((d = readdir(dp)) != NULL) {
+ while ((d = readdir(dp))) {
char *new_source, *new_dest;
new_source = concat_subpath_file(source, d->d_name);
- if (new_source == NULL)
+ if (!new_source)
continue;
new_dest = concat_path_file(dest, d->d_name);
if (copy_file(new_source, new_dest, flags & ~FILEUTILS_DEREFERENCE_L0) < 0)
@@ -155,16 +159,15 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
}
closedir(dp);
- if (!dest_exists
- && chmod(dest, source_stat.st_mode & ~saved_umask) < 0
- ) {
+ if (!dest_exists &&
+ chmod(dest, source_stat.st_mode & ~saved_umask) < 0) {
error_errno(_("can't preserve permissions of '%s'"), dest);
/* retval = -1; - WRONG! copy *WAS* made */
}
goto preserve_mode_ugid_time;
}
- if (S_ISREG(source_stat.st_mode) ) { /* "cp [-opts] regular_file thing2" */
+ if (S_ISREG(source_stat.st_mode)) { /* "cp [-opts] regular_file thing2" */
int src_fd;
int dst_fd;
mode_t new_mode;
@@ -199,7 +202,7 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
if (!S_ISREG(source_stat.st_mode))
new_mode = 0666;
- // POSIX way is a security problem versus (sym)link attacks
+ /* POSIX way is a security problem versus (sym)link attacks */
if (!ENABLE_FEATURE_NON_POSIX_CP) {
dst_fd = open(dest, O_WRONLY|O_CREAT|O_TRUNC, new_mode);
} else { /* safe way: */
@@ -226,13 +229,15 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
retval = error_errno(_("error writing to '%s'"), dest);
/* ...but read size is already checked by bb_copyfd_eof */
close(src_fd);
- /* "cp /dev/something new_file" should not
- * copy mode of /dev/something */
+ /*
+ * "cp /dev/something new_file" should not
+ * copy mode of /dev/something
+ */
if (!S_ISREG(source_stat.st_mode))
return retval;
goto preserve_mode_ugid_time;
}
- dont_cat:
+dont_cat:
/* Source is a symlink or a special file */
/* We are lazy here, a bit lax with races... */
@@ -252,20 +257,23 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
if (lchown(dest, source_stat.st_uid, source_stat.st_gid) < 0)
error_errno(_("can't preserve %s of '%s'"), "ownership", dest);
}
- /* _Not_ jumping to preserve_mode_ugid_time:
- * symlinks don't have those */
+ /*
+ * _Not_ jumping to preserve_mode_ugid_time: symlinks
+ * don't have those
+ */
return 0;
}
- if (S_ISBLK(source_stat.st_mode) || S_ISCHR(source_stat.st_mode)
- || S_ISSOCK(source_stat.st_mode) || S_ISFIFO(source_stat.st_mode)
- ) {
+ if (S_ISBLK(source_stat.st_mode) ||
+ S_ISCHR(source_stat.st_mode) ||
+ S_ISSOCK(source_stat.st_mode) ||
+ S_ISFIFO(source_stat.st_mode)) {
if (mknod(dest, source_stat.st_mode, source_stat.st_rdev) < 0)
return error_errno(_("can't create '%s'"), dest);
} else
return error(_("unrecognized file '%s' with mode %x"),
source, source_stat.st_mode);
- preserve_mode_ugid_time:
+preserve_mode_ugid_time:
if (1 /*FILEUTILS_PRESERVE_STATUS*/) {
struct timeval times[2];
--
2.8.2.524.g6ff3d78
^ permalink raw reply related [flat|nested] 40+ messages in thread* [PATCH v2 05/11] copy.c: convert copy_file() to copy_dir_recursively()
2016-11-28 9:43 ` [PATCH v2 " Nguyễn Thái Ngọc Duy
` (3 preceding siblings ...)
2016-11-28 9:43 ` [PATCH v2 04/11] copy.c: style fix Nguyễn Thái Ngọc Duy
@ 2016-11-28 9:43 ` Nguyễn Thái Ngọc Duy
2016-11-28 9:43 ` [PATCH v2 06/11] worktree.c: add validate_worktree() Nguyễn Thái Ngọc Duy
` (6 subsequent siblings)
11 siblings, 0 replies; 40+ messages in thread
From: Nguyễn Thái Ngọc Duy @ 2016-11-28 9:43 UTC (permalink / raw)
To: git; +Cc: Junio C Hamano, Nguyễn Thái Ngọc Duy
This finally enables busybox's copy_file() code under a new name
(because "copy_file" is already taken in Git code base). Because this
comes from busybox, POSIXy (or even Linuxy) behavior is expected. More
changes may be needed for Windows support.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
cache.h | 1 +
copy.c | 216 ++++++++++++++++++++++++++++++++++++++++++++++++++++------------
2 files changed, 179 insertions(+), 38 deletions(-)
diff --git a/cache.h b/cache.h
index a50a61a..a9a72f8 100644
--- a/cache.h
+++ b/cache.h
@@ -1857,6 +1857,7 @@ extern void fprintf_or_die(FILE *, const char *fmt, ...);
extern int copy_fd(int ifd, int ofd);
extern int copy_file(const char *dst, const char *src, int mode);
extern int copy_file_with_time(const char *dst, const char *src, int mode);
+extern int copy_dir_recursively(const char *source, const char *dest);
extern void write_or_die(int fd, const void *buf, size_t count);
extern void fsync_or_die(int fd, const char *);
diff --git a/copy.c b/copy.c
index 60c7d8a..8ef4b23 100644
--- a/copy.c
+++ b/copy.c
@@ -1,4 +1,6 @@
#include "cache.h"
+#include "dir.h"
+#include "hashmap.h"
int copy_fd(int ifd, int ofd)
{
@@ -66,21 +68,126 @@ int copy_file_with_time(const char *dst, const char *src, int mode)
return status;
}
-#if 0
-/* Return:
- * -1 error, copy not made
- * 0 copy is made or user answered "no" in interactive mode
- * (failures to preserve mode/owner/times are not reported in exit code)
+struct inode_key {
+ struct hashmap_entry entry;
+ ino_t ino;
+ dev_t dev;
+ /*
+ * Reportedly, on cramfs a file and a dir can have same ino.
+ * Need to also remember "file/dir" bit:
+ */
+ char isdir; /* bool */
+};
+
+struct inode_value {
+ struct inode_key key;
+ char name[FLEX_ARRAY];
+};
+
+#define HASH_SIZE 311u /* Should be prime */
+static inline unsigned hash_inode(ino_t i)
+{
+ return i % HASH_SIZE;
+}
+
+static int inode_cmp(const void *entry, const void *entry_or_key,
+ const void *keydata)
+{
+ const struct inode_value *inode = entry;
+ const struct inode_key *key = entry_or_key;
+
+ return !(inode->key.ino == key->ino &&
+ inode->key.dev == key->dev &&
+ inode->key.isdir == key->isdir);
+}
+
+static const char *is_in_ino_dev_hashtable(const struct hashmap *map,
+ const struct stat *st)
+{
+ struct inode_key key;
+ struct inode_value *value;
+
+ key.entry.hash = hash_inode(st->st_ino);
+ key.ino = st->st_ino;
+ key.dev = st->st_dev;
+ key.isdir = !!S_ISDIR(st->st_mode);
+ value = hashmap_get(map, &key, NULL);
+ return value ? value->name : NULL;
+}
+
+static void add_to_ino_dev_hashtable(struct hashmap *map,
+ const struct stat *st,
+ const char *path)
+{
+ struct inode_value *v;
+ int len = strlen(path);
+
+ v = xmalloc(offsetof(struct inode_value, name) + len + 1);
+ v->key.entry.hash = hash_inode(st->st_ino);
+ v->key.ino = st->st_ino;
+ v->key.dev = st->st_dev;
+ v->key.isdir = !!S_ISDIR(st->st_mode);
+ memcpy(v->name, path, len + 1);
+ hashmap_add(map, v);
+}
+
+/*
+ * Find out if the last character of a string matches the one given.
+ * Don't underrun the buffer if the string length is 0.
*/
-int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
+static inline char *last_char_is(const char *s, int c)
+{
+ if (s && *s) {
+ size_t sz = strlen(s) - 1;
+ s += sz;
+ if ((unsigned char)*s == c)
+ return (char *)s;
+ }
+ return NULL;
+}
+
+static inline char *concat_path_file(const char *path, const char *filename)
+{
+ struct strbuf sb = STRBUF_INIT;
+ char *lc;
+
+ if (!path)
+ path = "";
+ lc = last_char_is(path, '/');
+ while (*filename == '/')
+ filename++;
+ strbuf_addf(&sb, "%s%s%s", path, !lc ? "/" : "", filename);
+ return strbuf_detach(&sb, NULL);
+}
+
+static char *concat_subpath_file(const char *path, const char *f)
+{
+ if (f && is_dot_or_dotdot(f))
+ return NULL;
+ return concat_path_file(path, f);
+}
+
+static int do_unlink(const char *dest)
+{
+ int e = errno;
+
+ if (unlink(dest) < 0) {
+ errno = e; /* do not use errno from unlink */
+ return error_errno(_("can't create '%s'"), dest);
+ }
+ return 0;
+}
+
+static int copy_dir_1(struct hashmap *inode_map,
+ const char *source,
+ const char *dest)
{
/* This is a recursive function, try to minimize stack usage */
- /* NB: each struct stat is ~100 bytes */
struct stat source_stat;
struct stat dest_stat;
- smallint retval = 0;
- smallint dest_exists = 0;
- smallint ovr;
+ int retval = 0;
+ int dest_exists = 0;
+ int ovr;
if (lstat(source, &source_stat) < 0)
return error_errno(_("can't stat '%s'"), source);
@@ -102,7 +209,7 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
mode_t saved_umask = 0;
/* Did we ever create source ourself before? */
- tp = is_in_ino_dev_hashtable(&source_stat);
+ tp = is_in_ino_dev_hashtable(inode_map, &source_stat);
if (tp)
/* We did! it's a recursion! man the lifeboats... */
return error(_("recursion detected, omitting directory '%s'"),
@@ -132,11 +239,12 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
if (lstat(dest, &dest_stat) < 0)
return error_errno(_("can't stat '%s'"), dest);
}
+
/*
* remember (dev,inode) of each created dir. name is
* not remembered
*/
- add_to_ino_dev_hashtable(&dest_stat, NULL);
+ add_to_ino_dev_hashtable(inode_map, &dest_stat, "");
/* Recursively copy files in SOURCE */
dp = opendir(source);
@@ -152,7 +260,7 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
if (!new_source)
continue;
new_dest = concat_path_file(dest, d->d_name);
- if (copy_file(new_source, new_dest, flags & ~FILEUTILS_DEREFERENCE_L0) < 0)
+ if (copy_dir_1(inode_map, new_source, new_dest) < 0)
retval = -1;
free(new_source);
free(new_dest);
@@ -177,53 +285,57 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
goto dont_cat;
}
- if (ENABLE_FEATURE_PRESERVE_HARDLINKS) {
+ if (1 /*ENABLE_FEATURE_PRESERVE_HARDLINKS*/) {
const char *link_target;
- link_target = is_in_ino_dev_hashtable(&source_stat);
+ link_target = is_in_ino_dev_hashtable(inode_map, &source_stat);
if (link_target) {
if (link(link_target, dest) < 0) {
- ovr = ask_and_unlink(dest, flags);
- if (ovr <= 0)
+ ovr = do_unlink(dest);
+ if (ovr < 0)
return ovr;
if (link(link_target, dest) < 0)
return error_errno(_("can't create link '%s'"), dest);
}
return 0;
}
- add_to_ino_dev_hashtable(&source_stat, dest);
+ add_to_ino_dev_hashtable(inode_map, &source_stat, dest);
}
- src_fd = open_or_warn(source, O_RDONLY);
+ src_fd = open(source, O_RDONLY);
if (src_fd < 0)
- return -1;
+ return error_errno(_("can't open '%s'"), source);
/* Do not try to open with weird mode fields */
new_mode = source_stat.st_mode;
if (!S_ISREG(source_stat.st_mode))
new_mode = 0666;
- /* POSIX way is a security problem versus (sym)link attacks */
- if (!ENABLE_FEATURE_NON_POSIX_CP) {
- dst_fd = open(dest, O_WRONLY|O_CREAT|O_TRUNC, new_mode);
- } else { /* safe way: */
- dst_fd = open(dest, O_WRONLY|O_CREAT|O_EXCL, new_mode);
- }
+ dst_fd = open(dest, O_WRONLY|O_CREAT|O_EXCL, new_mode);
if (dst_fd == -1) {
- ovr = ask_and_unlink(dest, flags);
- if (ovr <= 0) {
+ ovr = do_unlink(dest);
+ if (ovr < 0) {
close(src_fd);
return ovr;
}
/* It shouldn't exist. If it exists, do not open (symlink attack?) */
- dst_fd = open3_or_warn(dest, O_WRONLY|O_CREAT|O_EXCL, new_mode);
+ dst_fd = open(dest, O_WRONLY|O_CREAT|O_EXCL, new_mode);
if (dst_fd < 0) {
close(src_fd);
- return -1;
+ return error_errno(_("can't open '%s'"), dest);
}
}
- if (bb_copyfd_eof(src_fd, dst_fd) == -1)
+ switch (copy_fd(src_fd, dst_fd)) {
+ case COPY_READ_ERROR:
+ error(_("copy-fd: read returned %s"), strerror(errno));
retval = -1;
+ break;
+ case COPY_WRITE_ERROR:
+ error(_("copy-fd: write returned %s"), strerror(errno));
+ retval = -1;
+ break;
+ }
+
/* Careful with writing... */
if (close(dst_fd) < 0)
retval = error_errno(_("error writing to '%s'"), dest);
@@ -243,19 +355,28 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
/* We are lazy here, a bit lax with races... */
if (dest_exists) {
errno = EEXIST;
- ovr = ask_and_unlink(dest, flags);
- if (ovr <= 0)
+ ovr = do_unlink(dest);
+ if (ovr < 0)
return ovr;
}
if (S_ISLNK(source_stat.st_mode)) {
- char *lpath = xmalloc_readlink_or_warn(source);
- if (lpath) {
- int r = symlink(lpath, dest);
- free(lpath);
+ struct strbuf lpath = STRBUF_INIT;
+ if (!strbuf_readlink(&lpath, source, 0)) {
+ int r = symlink(lpath.buf, dest);
+ strbuf_release(&lpath);
if (r < 0)
return error_errno(_("can't create symlink '%s'"), dest);
if (lchown(dest, source_stat.st_uid, source_stat.st_gid) < 0)
error_errno(_("can't preserve %s of '%s'"), "ownership", dest);
+ } else {
+ /* EINVAL => "file: Invalid argument" => puzzled user */
+ const char *errmsg = _("not a symlink");
+ int err = errno;
+
+ if (err != EINVAL)
+ errmsg = strerror(err);
+ error(_("%s: cannot read link: %s"), source, errmsg);
+ strbuf_release(&lpath);
}
/*
* _Not_ jumping to preserve_mode_ugid_time: symlinks
@@ -293,4 +414,23 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
return retval;
}
-#endif
+
+/*
+ * Return:
+ * -1 error, copy not made
+ * 0 copy is made
+ *
+ * Failures to preserve mode/owner/times are not reported in exit
+ * code. No support for preserving SELinux security context. Symlinks
+ * and hardlinks are preserved.
+ */
+int copy_dir_recursively(const char *source, const char *dest)
+{
+ int ret;
+ struct hashmap inode_map;
+
+ hashmap_init(&inode_map, inode_cmp, 1024);
+ ret = copy_dir_1(&inode_map, source, dest);
+ hashmap_free(&inode_map, 1);
+ return ret;
+}
--
2.8.2.524.g6ff3d78
^ permalink raw reply related [flat|nested] 40+ messages in thread* [PATCH v2 06/11] worktree.c: add validate_worktree()
2016-11-28 9:43 ` [PATCH v2 " Nguyễn Thái Ngọc Duy
` (4 preceding siblings ...)
2016-11-28 9:43 ` [PATCH v2 05/11] copy.c: convert copy_file() to copy_dir_recursively() Nguyễn Thái Ngọc Duy
@ 2016-11-28 9:43 ` Nguyễn Thái Ngọc Duy
2016-11-28 9:43 ` [PATCH v2 07/11] worktree.c: add update_worktree_location() Nguyễn Thái Ngọc Duy
` (5 subsequent siblings)
11 siblings, 0 replies; 40+ messages in thread
From: Nguyễn Thái Ngọc Duy @ 2016-11-28 9:43 UTC (permalink / raw)
To: git; +Cc: Junio C Hamano, Nguyễn Thái Ngọc Duy
This function is later used by "worktree move" and "worktree remove"
to ensure that we have a good connection between the repository and
the worktree. For example, if a worktree is moved manually, the
worktree location recorded in $GIT_DIR/worktrees/.../gitdir is
incorrect and we should not move that one.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
worktree.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
worktree.h | 5 +++++
2 files changed, 68 insertions(+)
diff --git a/worktree.c b/worktree.c
index eb61212..929072a 100644
--- a/worktree.c
+++ b/worktree.c
@@ -291,6 +291,69 @@ const char *is_worktree_locked(struct worktree *wt)
return wt->lock_reason;
}
+static int report(int quiet, const char *fmt, ...)
+{
+ va_list params;
+
+ if (quiet)
+ return -1;
+
+ va_start(params, fmt);
+ vfprintf(stderr, fmt, params);
+ fputc('\n', stderr);
+ va_end(params);
+ return -1;
+}
+
+int validate_worktree(const struct worktree *wt, int quiet)
+{
+ struct strbuf sb = STRBUF_INIT;
+ const char *path;
+ int err;
+
+ if (is_main_worktree(wt)) {
+ /*
+ * Main worktree using .git file to point to the
+ * repository would make it impossible to know where
+ * the actual worktree is if this function is executed
+ * from another worktree. No .git file support for now.
+ */
+ strbuf_addf(&sb, "%s/.git", wt->path);
+ if (!is_directory(sb.buf)) {
+ strbuf_release(&sb);
+ return report(quiet, _("'%s/.git' at main worktree is not the repository directory"),
+ wt->path);
+ }
+ return 0;
+ }
+
+ /*
+ * Make sure "gitdir" file points to a real .git file and that
+ * file points back here.
+ */
+ if (!is_absolute_path(wt->path))
+ return report(quiet, _("'%s' file does not contain absolute path to the worktree location"),
+ git_common_path("worktrees/%s/gitdir", wt->id));
+
+ strbuf_addf(&sb, "%s/.git", wt->path);
+ if (!file_exists(sb.buf)) {
+ strbuf_release(&sb);
+ return report(quiet, _("'%s/.git' does not exist"), wt->path);
+ }
+
+ path = read_gitfile_gently(sb.buf, &err);
+ strbuf_release(&sb);
+ if (!path)
+ return report(quiet, _("'%s/.git' is not a .git file, error code %d"),
+ wt->path, err);
+
+ if (fspathcmp(path, real_path(git_common_path("worktrees/%s", wt->id))))
+ return report(quiet, _("'%s' does not point back to"),
+ wt->path, git_common_path("worktrees/%s", wt->id));
+
+ return 0;
+}
+
int is_worktree_being_rebased(const struct worktree *wt,
const char *target)
{
diff --git a/worktree.h b/worktree.h
index d59ce1f..4433db2 100644
--- a/worktree.h
+++ b/worktree.h
@@ -52,6 +52,11 @@ extern int is_main_worktree(const struct worktree *wt);
*/
extern const char *is_worktree_locked(struct worktree *wt);
+/*
+ * Return zero if the worktree is in good condition.
+ */
+extern int validate_worktree(const struct worktree *wt, int quiet);
+
/*
* Free up the memory for worktree(s)
*/
--
2.8.2.524.g6ff3d78
^ permalink raw reply related [flat|nested] 40+ messages in thread* [PATCH v2 07/11] worktree.c: add update_worktree_location()
2016-11-28 9:43 ` [PATCH v2 " Nguyễn Thái Ngọc Duy
` (5 preceding siblings ...)
2016-11-28 9:43 ` [PATCH v2 06/11] worktree.c: add validate_worktree() Nguyễn Thái Ngọc Duy
@ 2016-11-28 9:43 ` Nguyễn Thái Ngọc Duy
2016-11-28 9:43 ` [PATCH v2 08/11] worktree move: new command Nguyễn Thái Ngọc Duy
` (4 subsequent siblings)
11 siblings, 0 replies; 40+ messages in thread
From: Nguyễn Thái Ngọc Duy @ 2016-11-28 9:43 UTC (permalink / raw)
To: git; +Cc: Junio C Hamano, Nguyễn Thái Ngọc Duy
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
worktree.c | 21 +++++++++++++++++++++
worktree.h | 6 ++++++
2 files changed, 27 insertions(+)
diff --git a/worktree.c b/worktree.c
index 929072a..7684951 100644
--- a/worktree.c
+++ b/worktree.c
@@ -354,6 +354,27 @@ int validate_worktree(const struct worktree *wt, int quiet)
return 0;
}
+int update_worktree_location(struct worktree *wt, const char *path_)
+{
+ struct strbuf path = STRBUF_INIT;
+ int ret = 0;
+
+ if (is_main_worktree(wt))
+ return 0;
+
+ strbuf_add_absolute_path(&path, path_);
+ if (fspathcmp(wt->path, path.buf)) {
+ write_file(git_common_path("worktrees/%s/gitdir",
+ wt->id),
+ "%s/.git", real_path(path.buf));
+ free(wt->path);
+ wt->path = strbuf_detach(&path, NULL);
+ ret = 0;
+ }
+ strbuf_release(&path);
+ return ret;
+}
+
int is_worktree_being_rebased(const struct worktree *wt,
const char *target)
{
diff --git a/worktree.h b/worktree.h
index 4433db2..1ee03f4 100644
--- a/worktree.h
+++ b/worktree.h
@@ -57,6 +57,12 @@ extern const char *is_worktree_locked(struct worktree *wt);
*/
extern int validate_worktree(const struct worktree *wt, int quiet);
+/*
+ * Update worktrees/xxx/gitdir with the new path.
+ */
+extern int update_worktree_location(struct worktree *wt,
+ const char *path_);
+
/*
* Free up the memory for worktree(s)
*/
--
2.8.2.524.g6ff3d78
^ permalink raw reply related [flat|nested] 40+ messages in thread* [PATCH v2 08/11] worktree move: new command
2016-11-28 9:43 ` [PATCH v2 " Nguyễn Thái Ngọc Duy
` (6 preceding siblings ...)
2016-11-28 9:43 ` [PATCH v2 07/11] worktree.c: add update_worktree_location() Nguyễn Thái Ngọc Duy
@ 2016-11-28 9:43 ` Nguyễn Thái Ngọc Duy
2016-11-28 9:43 ` [PATCH v2 09/11] worktree move: accept destination as directory Nguyễn Thái Ngọc Duy
` (3 subsequent siblings)
11 siblings, 0 replies; 40+ messages in thread
From: Nguyễn Thái Ngọc Duy @ 2016-11-28 9:43 UTC (permalink / raw)
To: git; +Cc: Junio C Hamano, Nguyễn Thái Ngọc Duy
There are two options to move the main worktree, but both have
complications, so it's not implemented yet. Anyway the options are:
- convert the main worktree to a linked one and move it away, leave the
git repository where it is. The repo essentially becomes bare after
this move.
- move the repository with the main worktree. The tricky part is make
sure all file descriptors to the repository are closed, or it may
fail on Windows.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
Documentation/git-worktree.txt | 7 +++-
builtin/worktree.c | 62 ++++++++++++++++++++++++++++++++++
contrib/completion/git-completion.bash | 2 +-
t/t2028-worktree-move.sh | 30 ++++++++++++++++
4 files changed, 99 insertions(+), 2 deletions(-)
diff --git a/Documentation/git-worktree.txt b/Documentation/git-worktree.txt
index e257c19..1310513 100644
--- a/Documentation/git-worktree.txt
+++ b/Documentation/git-worktree.txt
@@ -12,6 +12,7 @@ SYNOPSIS
'git worktree add' [-f] [--detach] [--checkout] [-b <new-branch>] <path> [<branch>]
'git worktree list' [--porcelain]
'git worktree lock' [--reason <string>] <worktree>
+'git worktree move' <worktree> <new-path>
'git worktree prune' [-n] [-v] [--expire <expire>]
'git worktree unlock' <worktree>
@@ -71,6 +72,11 @@ files from being pruned automatically. This also prevents it from
being moved or deleted. Optionally, specify a reason for the lock
with `--reason`.
+move::
+
+Move a working tree to a new location. Note that the main working tree
+cannot be moved yet.
+
prune::
Prune working tree information in $GIT_DIR/worktrees.
@@ -252,7 +258,6 @@ performed manually, such as:
- `remove` to remove a linked working tree and its administrative files (and
warn if the working tree is dirty)
-- `mv` to move or rename a working tree and update its administrative files
GIT
---
diff --git a/builtin/worktree.c b/builtin/worktree.c
index 9a97e37..f114965 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -15,6 +15,7 @@ static const char * const worktree_usage[] = {
N_("git worktree add [<options>] <path> [<branch>]"),
N_("git worktree list [<options>]"),
N_("git worktree lock [<options>] <path>"),
+ N_("git worktree move <worktree> <new-path>"),
N_("git worktree prune [<options>]"),
N_("git worktree unlock <path>"),
NULL
@@ -524,6 +525,65 @@ static int unlock_worktree(int ac, const char **av, const char *prefix)
return ret;
}
+static int move_worktree(int ac, const char **av, const char *prefix)
+{
+ struct option options[] = {
+ OPT_END()
+ };
+ struct worktree **worktrees, *wt;
+ struct strbuf dst = STRBUF_INIT;
+ const char *reason;
+
+ ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
+ if (ac != 2)
+ usage_with_options(worktree_usage, options);
+
+ strbuf_addstr(&dst, prefix_filename(prefix,
+ strlen(prefix),
+ av[1]));
+ if (file_exists(dst.buf))
+ die(_("target '%s' already exists"), av[1]);
+
+ worktrees = get_worktrees(0);
+ wt = find_worktree(worktrees, prefix, av[0]);
+ if (!wt)
+ die(_("'%s' is not a working directory"), av[0]);
+ if (is_main_worktree(wt))
+ die(_("'%s' is a main working directory"), av[0]);
+ reason = is_worktree_locked(wt);
+ if (reason) {
+ if (*reason)
+ die(_("already locked, reason: %s"), reason);
+ die(_("already locked, no reason"));
+ }
+ if (validate_worktree(wt, 0))
+ return -1;
+
+ /*
+ * First try. Atomically move, and probably cheaper, if both
+ * source and target are on the same file system.
+ */
+ if (rename(wt->path, dst.buf) == -1) {
+ if (errno != EXDEV)
+ die_errno(_("failed to move '%s' to '%s'"),
+ wt->path, dst.buf);
+
+ /* second try.. */
+ if (copy_dir_recursively(wt->path, dst.buf))
+ die(_("failed to copy '%s' to '%s'"),
+ wt->path, dst.buf);
+ else {
+ struct strbuf sb = STRBUF_INIT;
+
+ strbuf_addstr(&sb, wt->path);
+ (void)remove_dir_recursively(&sb, 0);
+ strbuf_release(&sb);
+ }
+ }
+
+ return update_worktree_location(wt, dst.buf);
+}
+
int cmd_worktree(int ac, const char **av, const char *prefix)
{
struct option options[] = {
@@ -546,5 +606,7 @@ int cmd_worktree(int ac, const char **av, const char *prefix)
return lock_worktree(ac - 1, av + 1, prefix);
if (!strcmp(av[1], "unlock"))
return unlock_worktree(ac - 1, av + 1, prefix);
+ if (!strcmp(av[1], "move"))
+ return move_worktree(ac - 1, av + 1, prefix);
usage_with_options(worktree_usage, options);
}
diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 21016bf..613e03b 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -2715,7 +2715,7 @@ _git_whatchanged ()
_git_worktree ()
{
- local subcommands="add list lock prune unlock"
+ local subcommands="add list lock move prune unlock"
local subcommand="$(__git_find_on_cmdline "$subcommands")"
if [ -z "$subcommand" ]; then
__gitcomp "$subcommands"
diff --git a/t/t2028-worktree-move.sh b/t/t2028-worktree-move.sh
index 8298aaf..74070bd 100755
--- a/t/t2028-worktree-move.sh
+++ b/t/t2028-worktree-move.sh
@@ -59,4 +59,34 @@ test_expect_success 'unlock worktree twice' '
test_path_is_missing .git/worktrees/source/locked
'
+test_expect_success 'move non-worktree' '
+ mkdir abc &&
+ test_must_fail git worktree move abc def
+'
+
+test_expect_success 'move locked worktree' '
+ git worktree lock source &&
+ test_must_fail git worktree move source destination &&
+ git worktree unlock source
+'
+
+test_expect_success 'move worktree' '
+ git worktree move source destination &&
+ test_path_is_missing source &&
+ git worktree list --porcelain | grep "^worktree" >actual &&
+ cat <<-EOF >expected &&
+ worktree $TRASH_DIRECTORY
+ worktree $TRASH_DIRECTORY/destination
+ worktree $TRASH_DIRECTORY/elsewhere
+ EOF
+ test_cmp expected actual &&
+ git -C destination log --format=%s >actual2 &&
+ echo init >expected2 &&
+ test_cmp expected2 actual2
+'
+
+test_expect_success 'move main worktree' '
+ test_must_fail git worktree move . def
+'
+
test_done
--
2.8.2.524.g6ff3d78
^ permalink raw reply related [flat|nested] 40+ messages in thread* [PATCH v2 09/11] worktree move: accept destination as directory
2016-11-28 9:43 ` [PATCH v2 " Nguyễn Thái Ngọc Duy
` (7 preceding siblings ...)
2016-11-28 9:43 ` [PATCH v2 08/11] worktree move: new command Nguyễn Thái Ngọc Duy
@ 2016-11-28 9:43 ` Nguyễn Thái Ngọc Duy
2016-11-28 9:43 ` [PATCH v2 10/11] worktree move: refuse to move worktrees with submodules Nguyễn Thái Ngọc Duy
` (2 subsequent siblings)
11 siblings, 0 replies; 40+ messages in thread
From: Nguyễn Thái Ngọc Duy @ 2016-11-28 9:43 UTC (permalink / raw)
To: git; +Cc: Junio C Hamano, Nguyễn Thái Ngọc Duy
Similar to "mv a b/", which is actually "mv a b/a", we extract basename
of source worktree and create a directory of the same name at
destination if dst path is a directory.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
builtin/worktree.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/builtin/worktree.c b/builtin/worktree.c
index f114965..f732a74 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -541,7 +541,13 @@ static int move_worktree(int ac, const char **av, const char *prefix)
strbuf_addstr(&dst, prefix_filename(prefix,
strlen(prefix),
av[1]));
- if (file_exists(dst.buf))
+ if (is_directory(dst.buf))
+ /*
+ * keep going, dst will be appended after we get the
+ * source's absolute path
+ */
+ ;
+ else if (file_exists(dst.buf))
die(_("target '%s' already exists"), av[1]);
worktrees = get_worktrees(0);
@@ -559,6 +565,17 @@ static int move_worktree(int ac, const char **av, const char *prefix)
if (validate_worktree(wt, 0))
return -1;
+ if (is_directory(dst.buf)) {
+ const char *sep = find_last_dir_sep(wt->path);
+
+ if (!sep)
+ die(_("could not figure out destination name from '%s'"),
+ wt->path);
+ strbuf_addstr(&dst, sep);
+ if (file_exists(dst.buf))
+ die(_("target '%s' already exists"), dst.buf);
+ }
+
/*
* First try. Atomically move, and probably cheaper, if both
* source and target are on the same file system.
--
2.8.2.524.g6ff3d78
^ permalink raw reply related [flat|nested] 40+ messages in thread* [PATCH v2 10/11] worktree move: refuse to move worktrees with submodules
2016-11-28 9:43 ` [PATCH v2 " Nguyễn Thái Ngọc Duy
` (8 preceding siblings ...)
2016-11-28 9:43 ` [PATCH v2 09/11] worktree move: accept destination as directory Nguyễn Thái Ngọc Duy
@ 2016-11-28 9:43 ` Nguyễn Thái Ngọc Duy
2016-12-19 20:57 ` Stefan Beller
2016-11-28 9:43 ` [PATCH v2 11/11] worktree remove: new command Nguyễn Thái Ngọc Duy
2016-11-28 19:48 ` [PATCH v2 00/11] git worktree (re)move Junio C Hamano
11 siblings, 1 reply; 40+ messages in thread
From: Nguyễn Thái Ngọc Duy @ 2016-11-28 9:43 UTC (permalink / raw)
To: git; +Cc: Junio C Hamano, Nguyễn Thái Ngọc Duy
Submodules contains .git files with relative paths. After a worktree
move, these files need to be updated or they may point to nowhere.
This is a bandage patch to make sure "worktree move" don't break
people's worktrees by accident. When .git file update code is in
place, this validate_no_submodules() could be removed.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
builtin/worktree.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/builtin/worktree.c b/builtin/worktree.c
index f732a74..e36e4dc 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -525,6 +525,27 @@ static int unlock_worktree(int ac, const char **av, const char *prefix)
return ret;
}
+static void validate_no_submodules(const struct worktree *wt)
+{
+ struct index_state istate = {0};
+ int i, found_submodules = 0;
+
+ if (read_index_from(&istate, worktree_git_path(wt, "index")) > 0) {
+ for (i = 0; i < istate.cache_nr; i++) {
+ struct cache_entry *ce = istate.cache[i];
+
+ if (S_ISGITLINK(ce->ce_mode)) {
+ found_submodules = 1;
+ break;
+ }
+ }
+ }
+ discard_index(&istate);
+
+ if (found_submodules)
+ die(_("This working tree contains submodules and cannot be moved yet"));
+}
+
static int move_worktree(int ac, const char **av, const char *prefix)
{
struct option options[] = {
@@ -565,6 +586,8 @@ static int move_worktree(int ac, const char **av, const char *prefix)
if (validate_worktree(wt, 0))
return -1;
+ validate_no_submodules(wt);
+
if (is_directory(dst.buf)) {
const char *sep = find_last_dir_sep(wt->path);
--
2.8.2.524.g6ff3d78
^ permalink raw reply related [flat|nested] 40+ messages in thread* Re: [PATCH v2 10/11] worktree move: refuse to move worktrees with submodules
2016-11-28 9:43 ` [PATCH v2 10/11] worktree move: refuse to move worktrees with submodules Nguyễn Thái Ngọc Duy
@ 2016-12-19 20:57 ` Stefan Beller
0 siblings, 0 replies; 40+ messages in thread
From: Stefan Beller @ 2016-12-19 20:57 UTC (permalink / raw)
To: Nguyễn Thái Ngọc Duy; +Cc: git@vger.kernel.org, Junio C Hamano
On Mon, Nov 28, 2016 at 1:43 AM, Nguyễn Thái Ngọc Duy <pclouds@gmail.com> wrote:
> +
> + if (S_ISGITLINK(ce->ce_mode)) {
> + found_submodules = 1;
> + break;
> + }
While I applaud being careful with submodules, I think this may be a bit
overeager, because empty (both not initialized as well as not populated)
submodules are fine.
In origin/bw/grep-recurse-submodules^6 you find
int is_submodule_populated(const char *path)
that could be useful here, i.e. I'd imagine you'd change the condition to
if (S_ISGITLINK(ce->ce_mode)
&& !is_submodule_populated(ce->name)) {
...
I guess that can come as a fixup later though.
^ permalink raw reply [flat|nested] 40+ messages in thread
* [PATCH v2 11/11] worktree remove: new command
2016-11-28 9:43 ` [PATCH v2 " Nguyễn Thái Ngọc Duy
` (9 preceding siblings ...)
2016-11-28 9:43 ` [PATCH v2 10/11] worktree move: refuse to move worktrees with submodules Nguyễn Thái Ngọc Duy
@ 2016-11-28 9:43 ` Nguyễn Thái Ngọc Duy
2016-11-28 19:48 ` [PATCH v2 00/11] git worktree (re)move Junio C Hamano
11 siblings, 0 replies; 40+ messages in thread
From: Nguyễn Thái Ngọc Duy @ 2016-11-28 9:43 UTC (permalink / raw)
To: git; +Cc: Junio C Hamano, Nguyễn Thái Ngọc Duy
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
Documentation/git-worktree.txt | 21 +++++----
builtin/worktree.c | 79 ++++++++++++++++++++++++++++++++++
contrib/completion/git-completion.bash | 5 ++-
t/t2028-worktree-move.sh | 26 +++++++++++
4 files changed, 121 insertions(+), 10 deletions(-)
diff --git a/Documentation/git-worktree.txt b/Documentation/git-worktree.txt
index 1310513..bbde6b8 100644
--- a/Documentation/git-worktree.txt
+++ b/Documentation/git-worktree.txt
@@ -14,6 +14,7 @@ SYNOPSIS
'git worktree lock' [--reason <string>] <worktree>
'git worktree move' <worktree> <new-path>
'git worktree prune' [-n] [-v] [--expire <expire>]
+'git worktree remove' [--force] <worktree>
'git worktree unlock' <worktree>
DESCRIPTION
@@ -81,6 +82,13 @@ prune::
Prune working tree information in $GIT_DIR/worktrees.
+remove::
+
+Remove a working tree. Only clean working trees (no untracked files
+and no modification in tracked files) can be removed. Unclean working
+trees can be removed with `--force`. The main working tree cannot be
+removed.
+
unlock::
Unlock a working tree, allowing it to be pruned, moved or deleted.
@@ -90,9 +98,10 @@ OPTIONS
-f::
--force::
- By default, `add` refuses to create a new working tree when `<branch>`
- is already checked out by another working tree. This option overrides
- that safeguard.
+ By default, `add` refuses to create a new working tree when
+ `<branch>` is already checked out by another working tree and
+ `remove` refuses to remove an unclean working tree. This option
+ overrides that safeguard.
-b <new-branch>::
-B <new-branch>::
@@ -253,12 +262,6 @@ Multiple checkout in general is still experimental, and the support
for submodules is incomplete. It is NOT recommended to make multiple
checkouts of a superproject.
-git-worktree could provide more automation for tasks currently
-performed manually, such as:
-
-- `remove` to remove a linked working tree and its administrative files (and
- warn if the working tree is dirty)
-
GIT
---
Part of the linkgit:git[1] suite
diff --git a/builtin/worktree.c b/builtin/worktree.c
index e36e4dc..3167409 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -17,6 +17,7 @@ static const char * const worktree_usage[] = {
N_("git worktree lock [<options>] <path>"),
N_("git worktree move <worktree> <new-path>"),
N_("git worktree prune [<options>]"),
+ N_("git worktree remove [<options>] <worktree>"),
N_("git worktree unlock <path>"),
NULL
};
@@ -624,6 +625,82 @@ static int move_worktree(int ac, const char **av, const char *prefix)
return update_worktree_location(wt, dst.buf);
}
+static int remove_worktree(int ac, const char **av, const char *prefix)
+{
+ int force = 0;
+ struct option options[] = {
+ OPT_BOOL(0, "force", &force,
+ N_("force removing even if the worktree is dirty")),
+ OPT_END()
+ };
+ struct worktree **worktrees, *wt;
+ struct strbuf sb = STRBUF_INIT;
+ const char *reason;
+ int ret = 0;
+
+ ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
+ if (ac != 1)
+ usage_with_options(worktree_usage, options);
+
+ worktrees = get_worktrees(0);
+ wt = find_worktree(worktrees, prefix, av[0]);
+ if (!wt)
+ die(_("'%s' is not a working directory"), av[0]);
+ if (is_main_worktree(wt))
+ die(_("'%s' is a main working directory"), av[0]);
+ reason = is_worktree_locked(wt);
+ if (reason) {
+ if (*reason)
+ die(_("already locked, reason: %s"), reason);
+ die(_("already locked, no reason"));
+ }
+ if (validate_worktree(wt, 0))
+ return -1;
+
+ if (!force) {
+ struct argv_array child_env = ARGV_ARRAY_INIT;
+ struct child_process cp;
+ char buf[1];
+
+ argv_array_pushf(&child_env, "%s=%s/.git",
+ GIT_DIR_ENVIRONMENT, wt->path);
+ argv_array_pushf(&child_env, "%s=%s",
+ GIT_WORK_TREE_ENVIRONMENT, wt->path);
+ memset(&cp, 0, sizeof(cp));
+ argv_array_pushl(&cp.args, "status", "--porcelain", NULL);
+ cp.env = child_env.argv;
+ cp.git_cmd = 1;
+ cp.dir = wt->path;
+ cp.out = -1;
+ ret = start_command(&cp);
+ if (ret)
+ die_errno(_("failed to run git-status on '%s', code %d"),
+ av[0], ret);
+ ret = xread(cp.out, buf, sizeof(buf));
+ if (ret)
+ die(_("'%s' is dirty, use --force to delete it"), av[0]);
+ close(cp.out);
+ ret = finish_command(&cp);
+ if (ret)
+ die_errno(_("failed to run git-status on '%s', code %d"),
+ av[0], ret);
+ }
+ strbuf_addstr(&sb, wt->path);
+ if (remove_dir_recursively(&sb, 0)) {
+ error_errno(_("failed to delete '%s'"), sb.buf);
+ ret = -1;
+ }
+ strbuf_reset(&sb);
+ strbuf_addstr(&sb, git_common_path("worktrees/%s", wt->id));
+ if (remove_dir_recursively(&sb, 0)) {
+ error_errno(_("failed to delete '%s'"), sb.buf);
+ ret = -1;
+ }
+ strbuf_release(&sb);
+ free_worktrees(worktrees);
+ return ret;
+}
+
int cmd_worktree(int ac, const char **av, const char *prefix)
{
struct option options[] = {
@@ -648,5 +725,7 @@ int cmd_worktree(int ac, const char **av, const char *prefix)
return unlock_worktree(ac - 1, av + 1, prefix);
if (!strcmp(av[1], "move"))
return move_worktree(ac - 1, av + 1, prefix);
+ if (!strcmp(av[1], "remove"))
+ return remove_worktree(ac - 1, av + 1, prefix);
usage_with_options(worktree_usage, options);
}
diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 613e03b..f6855af 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -2715,7 +2715,7 @@ _git_whatchanged ()
_git_worktree ()
{
- local subcommands="add list lock move prune unlock"
+ local subcommands="add list lock move prune remove unlock"
local subcommand="$(__git_find_on_cmdline "$subcommands")"
if [ -z "$subcommand" ]; then
__gitcomp "$subcommands"
@@ -2733,6 +2733,9 @@ _git_worktree ()
prune,--*)
__gitcomp "--dry-run --expire --verbose"
;;
+ remove,--*)
+ __gitcomp "--force"
+ ;;
*)
;;
esac
diff --git a/t/t2028-worktree-move.sh b/t/t2028-worktree-move.sh
index 74070bd..084acc6 100755
--- a/t/t2028-worktree-move.sh
+++ b/t/t2028-worktree-move.sh
@@ -89,4 +89,30 @@ test_expect_success 'move main worktree' '
test_must_fail git worktree move . def
'
+test_expect_success 'remove main worktree' '
+ test_must_fail git worktree remove .
+'
+
+test_expect_success 'remove locked worktree' '
+ git worktree lock destination &&
+ test_must_fail git worktree remove destination &&
+ git worktree unlock destination
+'
+
+test_expect_success 'remove worktree with dirty tracked file' '
+ echo dirty >>destination/init.t &&
+ test_must_fail git worktree remove destination
+'
+
+test_expect_success 'remove worktree with untracked file' '
+ git -C destination checkout init.t &&
+ : >destination/untracked &&
+ test_must_fail git worktree remove destination
+'
+
+test_expect_success 'force remove worktree with untracked file' '
+ git worktree remove --force destination &&
+ test_path_is_missing destination
+'
+
test_done
--
2.8.2.524.g6ff3d78
^ permalink raw reply related [flat|nested] 40+ messages in thread* Re: [PATCH v2 00/11] git worktree (re)move
2016-11-28 9:43 ` [PATCH v2 " Nguyễn Thái Ngọc Duy
` (10 preceding siblings ...)
2016-11-28 9:43 ` [PATCH v2 11/11] worktree remove: new command Nguyễn Thái Ngọc Duy
@ 2016-11-28 19:48 ` Junio C Hamano
2016-11-28 20:20 ` Junio C Hamano
11 siblings, 1 reply; 40+ messages in thread
From: Junio C Hamano @ 2016-11-28 19:48 UTC (permalink / raw)
To: Nguyễn Thái Ngọc Duy, Johannes Schindelin; +Cc: git
Nguyễn Thái Ngọc Duy <pclouds@gmail.com> writes:
> v2 contains some style fix and adapts to the new get_worktrees() api
> from nd/worktree-list-fixup (which means it can't be built without
> that series).
>
> Nguyễn Thái Ngọc Duy (11):
> copy.c: import copy_file() from busybox
> copy.c: delete unused code in copy_file()
> copy.c: convert bb_(p)error_msg to error(_errno)
> copy.c: style fix
> copy.c: convert copy_file() to copy_dir_recursively()
> worktree.c: add validate_worktree()
> worktree.c: add update_worktree_location()
> worktree move: new command
> worktree move: accept destination as directory
> worktree move: refuse to move worktrees with submodules
> worktree remove: new command
>
> Documentation/git-worktree.txt | 28 ++-
> builtin/worktree.c | 181 ++++++++++++++++
> cache.h | 1 +
> contrib/completion/git-completion.bash | 5 +-
> copy.c | 369 +++++++++++++++++++++++++++++++++
> t/t2028-worktree-move.sh | 56 +++++
> worktree.c | 84 ++++++++
> worktree.h | 11 +
> 8 files changed, 724 insertions(+), 11 deletions(-)
Does this round address the issue raised in
http://public-inbox.org/git/alpine.DEB.2.20.1611161041040.3746@virtualbox
by Dscho?
Even if you are not tracking a fifo, for example, your working tree
may have one created in t/trash* directory during testing, and
letting platform "cp -r" taking care of it (if that is possible---I
didn't look at the code that calls busybox copy to see if you are
doing something exotic or just blindly copying everything in the
directory) may turn out to be a more portable way to do this, and I
suspect that the cost of copying one whole-tree would dominate the
run_command() overhead.
^ permalink raw reply [flat|nested] 40+ messages in thread* Re: [PATCH v2 00/11] git worktree (re)move
2016-11-28 19:48 ` [PATCH v2 00/11] git worktree (re)move Junio C Hamano
@ 2016-11-28 20:20 ` Junio C Hamano
2016-11-28 21:25 ` Johannes Sixt
2016-11-29 12:08 ` Duy Nguyen
0 siblings, 2 replies; 40+ messages in thread
From: Junio C Hamano @ 2016-11-28 20:20 UTC (permalink / raw)
To: Nguyễn Thái Ngọc Duy; +Cc: Johannes Schindelin, git
Junio C Hamano <gitster@pobox.com> writes:
> Does this round address the issue raised in
>
> http://public-inbox.org/git/alpine.DEB.2.20.1611161041040.3746@virtualbox
>
> by Dscho?
>
> Even if you are not tracking a fifo, for example, your working tree
> may have one created in t/trash* directory during testing, and
> letting platform "cp -r" taking care of it (if that is possible---I
> didn't look at the code that calls busybox copy to see if you are
> doing something exotic or just blindly copying everything in the
> directory) may turn out to be a more portable way to do this, and I
> suspect that the cost of copying one whole-tree would dominate the
> run_command() overhead.
Please do not take the above as me saying "you must spawn the
platform cp -r".
A more traditional alternative solution seen on this list is to work
together, leveraging expertise of each participant. From the build
log Dscho gave us, it seems that his Windows port lack at least
POSIX emulation for lchown, mknod, utimes and chown. It is hard to
decide without involving Windows expert what the best way to deal
with it in the code (e.g. To stub or #ifdef out these calls?
Provide suitable emulation in compat/? Something else?), and what
things other than these four are still missing.
^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [PATCH v2 00/11] git worktree (re)move
2016-11-28 20:20 ` Junio C Hamano
@ 2016-11-28 21:25 ` Johannes Sixt
2016-11-29 12:17 ` Duy Nguyen
2016-11-29 12:08 ` Duy Nguyen
1 sibling, 1 reply; 40+ messages in thread
From: Johannes Sixt @ 2016-11-28 21:25 UTC (permalink / raw)
To: Junio C Hamano, Nguyễn Thái Ngọc Duy
Cc: Johannes Schindelin, git
Am 28.11.2016 um 21:20 schrieb Junio C Hamano:
> Junio C Hamano <gitster@pobox.com> writes:
>
>> Does this round address the issue raised in
>>
>> http://public-inbox.org/git/alpine.DEB.2.20.1611161041040.3746@virtualbox
>>
>> by Dscho?
>>
>> Even if you are not tracking a fifo, for example, your working tree
>> may have one created in t/trash* directory during testing, and
>> letting platform "cp -r" taking care of it (if that is possible---I
>> didn't look at the code that calls busybox copy to see if you are
>> doing something exotic or just blindly copying everything in the
>> directory) may turn out to be a more portable way to do this, and I
>> suspect that the cost of copying one whole-tree would dominate the
>> run_command() overhead.
>
> Please do not take the above as me saying "you must spawn the
> platform cp -r".
copy_dir_recursively is used in 'worktree move' when the move is across
file systems. My stance on it is to punt in this case. *I* would not
trust Git, or any other program that is not *specifically* made to copy
a whole directory structure, to get all cases right when a simple
rename() is not sufficent. And, uh, oh, it does a
remove_dir_recursively() after it has finshed copying. No, Git is not a
tool to move directories, thank you very much!
-- Hannes
^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [PATCH v2 00/11] git worktree (re)move
2016-11-28 21:25 ` Johannes Sixt
@ 2016-11-29 12:17 ` Duy Nguyen
0 siblings, 0 replies; 40+ messages in thread
From: Duy Nguyen @ 2016-11-29 12:17 UTC (permalink / raw)
To: Johannes Sixt; +Cc: Junio C Hamano, Johannes Schindelin, Git Mailing List
On Tue, Nov 29, 2016 at 4:25 AM, Johannes Sixt <j6t@kdbg.org> wrote:
> Am 28.11.2016 um 21:20 schrieb Junio C Hamano:
>>
>> Junio C Hamano <gitster@pobox.com> writes:
>>
>>> Does this round address the issue raised in
>>>
>>>
>>> http://public-inbox.org/git/alpine.DEB.2.20.1611161041040.3746@virtualbox
>>>
>>> by Dscho?
>>>
>>> Even if you are not tracking a fifo, for example, your working tree
>>> may have one created in t/trash* directory during testing, and
>>> letting platform "cp -r" taking care of it (if that is possible---I
>>> didn't look at the code that calls busybox copy to see if you are
>>> doing something exotic or just blindly copying everything in the
>>> directory) may turn out to be a more portable way to do this, and I
>>> suspect that the cost of copying one whole-tree would dominate the
>>> run_command() overhead.
>>
>>
>> Please do not take the above as me saying "you must spawn the
>> platform cp -r".
>
>
> copy_dir_recursively is used in 'worktree move' when the move is across file
> systems. My stance on it is to punt in this case. *I* would not trust Git,
> or any other program that is not *specifically* made to copy a whole
> directory structure, to get all cases right when a simple rename() is not
> sufficent.
This is why I did not write new copy code. The code was from busybox,
probably battle tested for many years now. Of course bugs can slip in
when I integrated it to git.
> And, uh, oh, it does a remove_dir_recursively() after it has
> finshed copying. No, Git is not a tool to move directories, thank you very
> much!
I guess you won't like my (unsent) patch for moving .git dir either
;-) which does make me nervous. The thing is, these operations require
some more modification in .git. We can't ask the user to "move this
directory yourself, then come back to me and I will fix up the rest in
.git". First step "only support moving within the same filesystem"
works for me. But I don't know how rename() works on Windows...
--
Duy
^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [PATCH v2 00/11] git worktree (re)move
2016-11-28 20:20 ` Junio C Hamano
2016-11-28 21:25 ` Johannes Sixt
@ 2016-11-29 12:08 ` Duy Nguyen
2016-11-29 13:56 ` Duy Nguyen
1 sibling, 1 reply; 40+ messages in thread
From: Duy Nguyen @ 2016-11-29 12:08 UTC (permalink / raw)
To: Junio C Hamano; +Cc: Johannes Schindelin, Git Mailing List
On Tue, Nov 29, 2016 at 3:20 AM, Junio C Hamano <gitster@pobox.com> wrote:
> Junio C Hamano <gitster@pobox.com> writes:
>
>> Does this round address the issue raised in
>>
>> http://public-inbox.org/git/alpine.DEB.2.20.1611161041040.3746@virtualbox
>>
>> by Dscho?
It does not (and is sort of expected), quoting from the commit message
copy.c: convert copy_file() to copy_dir_recursively()
This finally enables busybox's copy_file() code under a new name
(because "copy_file" is already taken in Git code base). Because this
comes from busybox, POSIXy (or even Linuxy) behavior is expected. More
changes may be needed for Windows support.
I could "#ifdef WINDOWS return -ENOSYS" for now, which would make it
build. "git worktree move" won't work on Windows of course...
>> Even if you are not tracking a fifo, for example, your working tree
>> may have one created in t/trash* directory during testing, and
>> letting platform "cp -r" taking care of it (if that is possible---I
>> didn't look at the code that calls busybox copy to see if you are
>> doing something exotic or just blindly copying everything in the
>> directory) may turn out to be a more portable way to do this, and I
>> suspect that the cost of copying one whole-tree would dominate the
>> run_command() overhead.
>
> Please do not take the above as me saying "you must spawn the
> platform cp -r".
For the the record this was my first move but it will make it much
harder to handle errors, and there's no native "cp" on Windows.
--
Duy
^ permalink raw reply [flat|nested] 40+ messages in thread* Re: [PATCH v2 00/11] git worktree (re)move
2016-11-29 12:08 ` Duy Nguyen
@ 2016-11-29 13:56 ` Duy Nguyen
2016-11-29 19:28 ` Junio C Hamano
2016-11-29 21:14 ` Johannes Sixt
0 siblings, 2 replies; 40+ messages in thread
From: Duy Nguyen @ 2016-11-29 13:56 UTC (permalink / raw)
To: Junio C Hamano; +Cc: Johannes Schindelin, Git Mailing List, Johannes Sixt
On Tue, Nov 29, 2016 at 07:08:16PM +0700, Duy Nguyen wrote:
> On Tue, Nov 29, 2016 at 3:20 AM, Junio C Hamano <gitster@pobox.com> wrote:
> > Junio C Hamano <gitster@pobox.com> writes:
> >
> >> Does this round address the issue raised in
> >>
> >> http://public-inbox.org/git/alpine.DEB.2.20.1611161041040.3746@virtualbox
> >>
> >> by Dscho?
>
> It does not (and is sort of expected), quoting from the commit message
>
> copy.c: convert copy_file() to copy_dir_recursively()
>
> This finally enables busybox's copy_file() code under a new name
> (because "copy_file" is already taken in Git code base). Because this
> comes from busybox, POSIXy (or even Linuxy) behavior is expected. More
> changes may be needed for Windows support.
>
> I could "#ifdef WINDOWS return -ENOSYS" for now, which would make it
> build. "git worktree move" won't work on Windows of course...
Another way, as pointed out by j6t, is go with "move within filesystem
only", at least at the first step. Which is probably a good idea
anyway so we can concentrate on git-specific stuff before going to
minor and complicated copy/move details.
If you drop all the "copy.c: " patches and squash this to "worktree
move: new command", and if Windows rename() can move directories, then
git should build and new tests pass.
-- 8< --
diff --git a/builtin/worktree.c b/builtin/worktree.c
index f114965..d8d0127 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -569,9 +569,9 @@ static int move_worktree(int ac, const char **av, const char *prefix)
wt->path, dst.buf);
/* second try.. */
- if (copy_dir_recursively(wt->path, dst.buf))
- die(_("failed to copy '%s' to '%s'"),
- wt->path, dst.buf);
+ if (copy_dir_recursively(dst.buf, wt->path))
+ die_errno(_("failed to copy '%s' to '%s'"),
+ wt->path, dst.buf);
else {
struct strbuf sb = STRBUF_INIT;
diff --git a/cache.h b/cache.h
index a50a61a..2d4edf6 100644
--- a/cache.h
+++ b/cache.h
@@ -1857,6 +1857,7 @@ extern void fprintf_or_die(FILE *, const char *fmt, ...);
extern int copy_fd(int ifd, int ofd);
extern int copy_file(const char *dst, const char *src, int mode);
extern int copy_file_with_time(const char *dst, const char *src, int mode);
+extern int copy_dir_recursively(const char *dst, const char *src);
extern void write_or_die(int fd, const void *buf, size_t count);
extern void fsync_or_die(int fd, const char *);
diff --git a/copy.c b/copy.c
index 4de6a11..b232aec 100644
--- a/copy.c
+++ b/copy.c
@@ -65,3 +65,9 @@ int copy_file_with_time(const char *dst, const char *src, int mode)
return copy_times(dst, src);
return status;
}
+
+int copy_dir_recursively(const char *dst, const char *src)
+{
+ errno = ENOSYS;
+ return -1;
+}
-- 8< --
^ permalink raw reply related [flat|nested] 40+ messages in thread* Re: [PATCH v2 00/11] git worktree (re)move
2016-11-29 13:56 ` Duy Nguyen
@ 2016-11-29 19:28 ` Junio C Hamano
2016-11-30 0:18 ` Stefan Beller
2016-11-29 21:14 ` Johannes Sixt
1 sibling, 1 reply; 40+ messages in thread
From: Junio C Hamano @ 2016-11-29 19:28 UTC (permalink / raw)
To: Duy Nguyen; +Cc: Johannes Schindelin, Git Mailing List, Johannes Sixt
Duy Nguyen <pclouds@gmail.com> writes:
> Another way, as pointed out by j6t, is go with "move within filesystem
> only", at least at the first step. Which is probably a good idea
> anyway so we can concentrate on git-specific stuff before going to
> minor and complicated copy/move details.
Yup, that is a very sensible approach.
^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [PATCH v2 00/11] git worktree (re)move
2016-11-29 19:28 ` Junio C Hamano
@ 2016-11-30 0:18 ` Stefan Beller
0 siblings, 0 replies; 40+ messages in thread
From: Stefan Beller @ 2016-11-30 0:18 UTC (permalink / raw)
To: Junio C Hamano
Cc: Duy Nguyen, Johannes Schindelin, Git Mailing List, Johannes Sixt
On Tue, Nov 29, 2016 at 11:28 AM, Junio C Hamano <gitster@pobox.com> wrote:
> Duy Nguyen <pclouds@gmail.com> writes:
>
>> Another way, as pointed out by j6t, is go with "move within filesystem
>> only", at least at the first step. Which is probably a good idea
>> anyway so we can concentrate on git-specific stuff before going to
>> minor and complicated copy/move details.
>
> Yup, that is a very sensible approach.
In case you decided to go another way than a plain rename, please
make it easy to reuse (e.g. move_directory_safely exposed to the
rest of the codebase). I'd find use for that in the series currently
queued as:
sb/submodule-intern-gitdir
which moves git directories of submodules around (from inside the
submodule/.git to the superprojects .git/modules/<name>)
Thanks,
Stefan
^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [PATCH v2 00/11] git worktree (re)move
2016-11-29 13:56 ` Duy Nguyen
2016-11-29 19:28 ` Junio C Hamano
@ 2016-11-29 21:14 ` Johannes Sixt
2016-11-30 0:09 ` Duy Nguyen
1 sibling, 1 reply; 40+ messages in thread
From: Johannes Sixt @ 2016-11-29 21:14 UTC (permalink / raw)
To: Duy Nguyen; +Cc: Junio C Hamano, Johannes Schindelin, Git Mailing List
Am 29.11.2016 um 14:56 schrieb Duy Nguyen:
> If you drop all the "copy.c: " patches and squash this to "worktree
> move: new command", and if Windows rename() can move directories, then
> git should build and new tests pass.
Thanks! rename() can move directories on Windows, provided that
*nothing* inside the directory is in any form of use by any process,
particularly also not as the "current working directory" (as per getcwd()).
> diff --git a/copy.c b/copy.c
> index 4de6a11..b232aec 100644
> --- a/copy.c
> +++ b/copy.c
> @@ -65,3 +65,9 @@ int copy_file_with_time(const char *dst, const char *src, int mode)
> return copy_times(dst, src);
> return status;
> }
> +
> +int copy_dir_recursively(const char *dst, const char *src)
> +{
> + errno = ENOSYS;
> + return -1;
> +}
An error message "cannot move directories across devices" or something
would be preferable over "Function not implemented", of course. Or did
you mean to set errno = EXDEV?
-- Hannes
^ permalink raw reply [flat|nested] 40+ messages in thread* Re: [PATCH v2 00/11] git worktree (re)move
2016-11-29 21:14 ` Johannes Sixt
@ 2016-11-30 0:09 ` Duy Nguyen
0 siblings, 0 replies; 40+ messages in thread
From: Duy Nguyen @ 2016-11-30 0:09 UTC (permalink / raw)
To: Johannes Sixt; +Cc: Junio C Hamano, Johannes Schindelin, Git Mailing List
On Wed, Nov 30, 2016 at 4:14 AM, Johannes Sixt <j6t@kdbg.org> wrote:
>> diff --git a/copy.c b/copy.c
>> index 4de6a11..b232aec 100644
>> --- a/copy.c
>> +++ b/copy.c
>> @@ -65,3 +65,9 @@ int copy_file_with_time(const char *dst, const char
>> *src, int mode)
>> return copy_times(dst, src);
>> return status;
>> }
>> +
>> +int copy_dir_recursively(const char *dst, const char *src)
>> +{
>> + errno = ENOSYS;
>> + return -1;
>> +}
>
>
> An error message "cannot move directories across devices" or something would
> be preferable over "Function not implemented", of course. Or did you mean to
> set errno = EXDEV?
The exact message is not super important right now. Though I'm
thinking of adding move_directory() that is a wrapper of rename(). We
can die("cannot move directories across devices") then and hopefully
be able to move across devices at some point.
--
Duy
^ permalink raw reply [flat|nested] 40+ messages in thread