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basic/user-util: convert prefix_roota→path_join and use _cleanup_ more

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This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2023-01-31 16:17:12 +01:00
parent fddb524d8a
commit e5b30f7232
1 changed files with 6 additions and 14 deletions
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20
src/basic/user-util.c
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@ -670,7 +670,6 @@ int reset_uid_gid(void) {
}
int take_etc_passwd_lock(const char *root) {
struct flock flock = {
.l_type = F_WRLCK,
.l_whence = SEEK_SET,
@ -678,9 +677,6 @@ int take_etc_passwd_lock(const char *root) {
.l_len = 0,
};
const char *path;
int fd, r;
/* This is roughly the same as lckpwdf(), but not as awful. We don't want to use alarm() and signals,
* hence we implement our own trivial version of this.
*
@ -688,22 +684,18 @@ int take_etc_passwd_lock(const char *root) {
* given that they are redundant: they invoke lckpwdf() first and keep it during everything they do.
* The per-database locks are awfully racy, and thus we just won't do them. */
if (root)
path = prefix_roota(root, ETC_PASSWD_LOCK_PATH);
else
path = ETC_PASSWD_LOCK_PATH;
_cleanup_free_ char *path = path_join(root, ETC_PASSWD_LOCK_PATH);
if (!path)
return log_oom_debug();
fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0600);
_cleanup_close_ int fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0600);
if (fd < 0)
return log_debug_errno(errno, "Cannot open %s: %m", path);
r = fcntl(fd, F_SETLKW, &flock);
if (r < 0) {
safe_close(fd);
if (fcntl(fd, F_SETLKW, &flock) < 0)
return log_debug_errno(errno, "Locking %s failed: %m", path);
}
return fd;
return TAKE_FD(fd);
}
bool valid_user_group_name(const char *u, ValidUserFlags flags) {