[PATCH 2/3] Linux: Port ttyname, ttyname_r to <fd_file_name.h>

[Florian Weimer <fweimer@redhat.com>]

---
 misc/tst-fd_to_filename.c           | 1 +
 sysdeps/unix/sysv/linux/ttyname.c   | 7 +++----
 sysdeps/unix/sysv/linux/ttyname_r.c | 7 +++----
 3 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/misc/tst-fd_to_filename.c b/misc/tst-fd_to_filename.c
index 480f613dcf..eb08dd7e25 100644
--- a/misc/tst-fd_to_filename.c
+++ b/misc/tst-fd_to_filename.c
@@ -16,6 +16,7 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
+#include <fcntl.h>
 #include <fd_to_filename.h>
 #include <stdio.h>
 #include <support/check.h>
diff --git a/sysdeps/unix/sysv/linux/ttyname.c b/sysdeps/unix/sysv/linux/ttyname.c
index c05ca687f5..6034e132b0 100644
--- a/sysdeps/unix/sysv/linux/ttyname.c
+++ b/sysdeps/unix/sysv/linux/ttyname.c
@@ -25,8 +25,7 @@
 #include <unistd.h>
 #include <string.h>
 #include <stdlib.h>
-
-#include <_itoa.h>
+#include <fd_to_filename.h>
 
 #include "ttyname.h"
 
@@ -112,7 +111,6 @@ char *
 ttyname (int fd)
 {
   static size_t buflen;
-  char procname[30];
   struct stat64 st, st1;
   int dostat = 0;
   int doispty = 0;
@@ -129,7 +127,8 @@ ttyname (int fd)
     return NULL;
 
   /* We try using the /proc filesystem.  */
-  *_fitoa_word (fd, __stpcpy (procname, "/proc/self/fd/"), 10, 0) = '\0';
+  struct fd_to_filename procname_storage;
+  char *procname = __fd_to_filename (fd, &procname_storage);
 
   if (buflen == 0)
     {
diff --git a/sysdeps/unix/sysv/linux/ttyname_r.c b/sysdeps/unix/sysv/linux/ttyname_r.c
index 4a1ae40bb2..e16761b43d 100644
--- a/sysdeps/unix/sysv/linux/ttyname_r.c
+++ b/sysdeps/unix/sysv/linux/ttyname_r.c
@@ -25,8 +25,7 @@
 #include <unistd.h>
 #include <string.h>
 #include <stdlib.h>
-
-#include <_itoa.h>
+#include <fd_to_filename.h>
 
 #include "ttyname.h"
 
@@ -92,7 +91,6 @@ getttyname_r (char *buf, size_t buflen, const struct stat64 *mytty,
 int
 __ttyname_r (int fd, char *buf, size_t buflen)
 {
-  char procname[30];
   struct stat64 st, st1;
   int dostat = 0;
   int doispty = 0;
@@ -122,7 +120,8 @@ __ttyname_r (int fd, char *buf, size_t buflen)
     return errno;
 
   /* We try using the /proc filesystem.  */
-  *_fitoa_word (fd, __stpcpy (procname, "/proc/self/fd/"), 10, 0) = '\0';
+  struct fd_to_filename procname_storage;
+  char *procname = __fd_to_filename (fd, &procname_storage);
 
   ssize_t ret = __readlink (procname, buf, buflen - 1);
   if (__glibc_unlikely (ret == -1 && errno == ENAMETOOLONG))
-- 
2.24.1