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linux: use __fd_to_filename helper function instead of snprintf.

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Change made to fchmodat and fexecve. There are tests using xasprintf
instead of this helper as well, but this commit doesn't touch them.
This commit is contained in:
Érico Nogueira
2021-04-27 10:09:45 -03:00
committed by Adhemerval Zanella
parent 19d83270fc
commit 77c1573dbc
2 changed files with 7 additions and 16 deletions
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10
sysdeps/unix/sysv/linux/fexecve.c
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@ -22,6 +22,7 @@
#include <fcntl.h>
#include <sys/stat.h>
#include <fd_to_filename.h>
#include <sysdep.h>
#include <sys/syscall.h>
#include <kernel-features.h>
@ -49,12 +50,9 @@ fexecve (int fd, char *const argv[], char *const envp[])
#ifndef __ASSUME_EXECVEAT
/* We use the /proc filesystem to get the information. If it is not
mounted we fail. */
char buf[sizeof "/proc/self/fd/" + sizeof (int) * 3];
__snprintf (buf, sizeof (buf), "/proc/self/fd/%d", fd);
/* We do not need the return value. */
__execve (buf, argv, envp);
mounted we fail. We do not need the return value. */
struct fd_to_filename filename;
__execve (__fd_to_filename (fd, &filename), argv, envp);
int save = errno;