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fs-util: add new futimens_opath() helper 

futimens() that works for O_PATH fds.
This commit is contained in:
Lennart Poettering 2020-09-25 16:40:02 +02:00
parent 9271daeed7
commit f25bff5eaf
2 changed files with 21 additions and 0 deletions
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19
src/basic/fs-util.c
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@ -312,6 +312,25 @@ int fchmod_opath(int fd, mode_t m) {
return 0;
}
int futimens_opath(int fd, const struct timespec ts[2]) {
char procfs_path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
/* Similar to fchmod_path() but for futimens() */
xsprintf(procfs_path, "/proc/self/fd/%i", fd);
if (utimensat(AT_FDCWD, procfs_path, ts, 0) < 0) {
if (errno != ENOENT)
return -errno;
if (proc_mounted() == 0)
return -ENOSYS; /* if we have no /proc/, the concept is not implementable */
return -ENOENT;
}
return 0;
}
int stat_warn_permissions(const char *path, const struct stat *st) {
assert(path);
assert(st);

2
src/basic/fs-util.h
View File

@ -38,6 +38,8 @@ int fchmod_and_chown(int fd, mode_t mode, uid_t uid, gid_t gid);
int fchmod_umask(int fd, mode_t mode);
int fchmod_opath(int fd, mode_t m);
int futimens_opath(int fd, const struct timespec ts[2]);
int fd_warn_permissions(const char *path, int fd);
int stat_warn_permissions(const char *path, const struct stat *st);