From: "Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>
To: git@vger.kernel.org
Cc: "Junio C Hamano" <gitster@pobox.com>,
"Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>
Subject: [PATCH v2 02/11] copy.c: delete unused code in copy_file()
Date: Mon, 28 Nov 2016 16:43:10 +0700 [thread overview]
Message-ID: <20161128094319.16176-3-pclouds@gmail.com> (raw)
In-Reply-To: <20161128094319.16176-1-pclouds@gmail.com>
- 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
next prev parent reply other threads:[~2016-11-28 9:44 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-12 2:23 [PATCH 00/11] git worktree (re)move Nguyễn Thái Ngọc Duy
2016-11-12 2:23 ` [PATCH 01/11] copy.c: import copy_file() from busybox Nguyễn Thái Ngọc Duy
2016-11-12 2:23 ` [PATCH 02/11] copy.c: delete unused code in copy_file() Nguyễn Thái Ngọc Duy
2016-11-12 2:23 ` [PATCH 03/11] copy.c: convert bb_(p)error_msg to error(_errno) Nguyễn Thái Ngọc Duy
2016-11-12 2:23 ` [PATCH 04/11] copy.c: style fix Nguyễn Thái Ngọc Duy
2016-11-12 2:23 ` [PATCH 05/11] copy.c: convert copy_file() to copy_dir_recursively() Nguyễn Thái Ngọc Duy
2016-11-12 2:23 ` [PATCH 06/11] worktree.c: add validate_worktree() Nguyễn Thái Ngọc Duy
2016-11-12 2:23 ` [PATCH 07/11] worktree.c: add update_worktree_location() Nguyễn Thái Ngọc Duy
2016-11-12 2:23 ` [PATCH 08/11] worktree move: new command Nguyễn Thái Ngọc Duy
2016-11-12 2:23 ` [PATCH 09/11] worktree move: accept destination as directory Nguyễn Thái Ngọc Duy
2016-11-12 2:23 ` [PATCH 10/11] worktree move: refuse to move worktrees with submodules Nguyễn Thái Ngọc Duy
2016-11-12 2:23 ` [PATCH 11/11] worktree remove: new command Nguyễn Thái Ngọc Duy
[not found] ` <xmqqeg2gyv1v.fsf@gitster.mtv.corp.google.com>
[not found] ` <xmqqa8d4yts7.fsf@gitster.mtv.corp.google.com>
2016-11-16 13:05 ` [PATCH 00/11] git worktree (re)move Duy Nguyen
2016-11-16 13:11 ` Duy Nguyen
2016-11-16 18:11 ` Junio C Hamano
2016-11-16 18:39 ` Junio C Hamano
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 [this message]
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 ` [PATCH v2 04/11] copy.c: style fix 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
2016-11-28 9:43 ` [PATCH v2 06/11] worktree.c: add validate_worktree() Nguyễn Thái Ngọc Duy
2016-11-28 9:43 ` [PATCH v2 07/11] worktree.c: add update_worktree_location() Nguyễn Thái Ngọc Duy
2016-11-28 9:43 ` [PATCH v2 08/11] worktree move: new command Nguyễn Thái Ngọc Duy
2016-11-28 9:43 ` [PATCH v2 09/11] worktree move: accept destination as directory 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
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
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
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
2016-11-30 0:09 ` Duy Nguyen
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