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fs-util: add mknodat_atomic()

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This commit is contained in:
Lennart Poettering 2022-09-16 12:45:02 +01:00
parent 4f477796f3
commit 497ca785aa
2 changed files with 12 additions and 6 deletions
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11
src/basic/fs-util.c
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@ -463,7 +463,7 @@ int symlinkat_atomic_full(const char *from, int atfd, const char *to, bool make_
return 0; return 0;
} }
int mknod_atomic(const char *path, mode_t mode, dev_t dev) { int mknodat_atomic(int atfd, const char *path, mode_t mode, dev_t dev) {
_cleanup_free_ char *t = NULL; _cleanup_free_ char *t = NULL;
int r; int r;
@ -473,12 +473,13 @@ int mknod_atomic(const char *path, mode_t mode, dev_t dev) {
if (r < 0) if (r < 0)
return r; return r;
if (mknod(t, mode, dev) < 0) if (mknodat(atfd, t, mode, dev) < 0)
return -errno; return -errno;
if (rename(t, path) < 0) { r = RET_NERRNO(renameat(atfd, t, atfd, path));
unlink_noerrno(t); if (r < 0) {
return -errno; (void) unlinkat(atfd, t, 0);
return r;
} }
return 0; return 0;

7
src/basic/fs-util.h
View File

@ -62,7 +62,12 @@ int symlinkat_atomic_full(const char *from, int atfd, const char *to, bool make_
static inline int symlink_atomic(const char *from, const char *to) { static inline int symlink_atomic(const char *from, const char *to) {
return symlinkat_atomic_full(from, AT_FDCWD, to, false); return symlinkat_atomic_full(from, AT_FDCWD, to, false);
} }
int mknod_atomic(const char *path, mode_t mode, dev_t dev);
int mknodat_atomic(int atfd, const char *path, mode_t mode, dev_t dev);
static inline int mknod_atomic(const char *path, mode_t mode, dev_t dev) {
return mknodat_atomic(AT_FDCWD, path, mode, dev);
}
int mkfifoat_atomic(int dir_fd, const char *path, mode_t mode); int mkfifoat_atomic(int dir_fd, const char *path, mode_t mode);
static inline int mkfifo_atomic(const char *path, mode_t mode) { static inline int mkfifo_atomic(const char *path, mode_t mode) {
return mkfifoat_atomic(AT_FDCWD, path, mode); return mkfifoat_atomic(AT_FDCWD, path, mode);