#include "parse-util.h"
#include "path-util.h"
#include "set.h"
+#include "stat-util.h"
#define MAKE_SET(s) ((Set*) s)
#define MAKE_FDSET(s) ((FDSet*) s)
return MAKE_FDSET(set_new(NULL));
}
-int fdset_new_array(FDSet **ret, const int *fds, size_t n_fds) {
- size_t i;
- FDSet *s;
+static inline void fdset_shallow_freep(FDSet **s) {
+ /* Destroys the set, but does not free the fds inside, like fdset_free()! */
+ set_free(MAKE_SET(*ASSERT_PTR(s)));
+}
+
+int fdset_new_array(FDSet **ret, const int fds[], size_t n_fds) {
+ _cleanup_(fdset_shallow_freep) FDSet *s = NULL;
int r;
assert(ret);
+ assert(fds || n_fds == 0);
s = fdset_new();
if (!s)
return -ENOMEM;
- for (i = 0; i < n_fds; i++) {
-
+ for (size_t i = 0; i < n_fds; i++) {
r = fdset_put(s, fds[i]);
- if (r < 0) {
- set_free(MAKE_SET(s));
+ if (r < 0)
return r;
- }
}
- *ret = s;
+ *ret = TAKE_PTR(s);
return 0;
}
}
int fdset_put_dup(FDSet *s, int fd) {
- int copy, r;
+ _cleanup_close_ int copy = -EBADF;
+ int r;
assert(s);
assert(fd >= 0);
return -errno;
r = fdset_put(s, copy);
- if (r < 0) {
- safe_close(copy);
+ if (r < 0)
return r;
- }
- return copy;
+ return TAKE_FD(copy);
}
bool fdset_contains(FDSet *s, int fd) {
return set_remove(MAKE_SET(s), FD_TO_PTR(fd)) ? fd : -ENOENT;
}
-int fdset_new_fill(FDSet **_s) {
+int fdset_new_fill(FDSet **ret) {
+ _cleanup_(fdset_shallow_freep) FDSet *s = NULL;
_cleanup_closedir_ DIR *d = NULL;
- int r = 0;
- FDSet *s;
+ int r;
- assert(_s);
+ assert(ret);
- /* Creates an fdset and fills in all currently open file
- * descriptors. */
+ /* Creates an fdset and fills in all currently open file descriptors. */
d = opendir("/proc/self/fd");
- if (!d)
+ if (!d) {
+ if (errno == ENOENT && proc_mounted() == 0)
+ return -ENOSYS;
+
return -errno;
+ }
s = fdset_new();
- if (!s) {
- r = -ENOMEM;
- goto finish;
- }
+ if (!s)
+ return -ENOMEM;
FOREACH_DIRENT(de, d, return -errno) {
int fd = -EBADF;
r = safe_atoi(de->d_name, &fd);
if (r < 0)
- goto finish;
+ return r;
if (fd < 3)
continue;
-
if (fd == dirfd(d))
continue;
r = fdset_put(s, fd);
if (r < 0)
- goto finish;
+ return r;
}
- r = 0;
- *_s = TAKE_PTR(s);
-
-finish:
- /* We won't close the fds here! */
- if (s)
- set_free(MAKE_SET(s));
-
- return r;
+ *ret = TAKE_PTR(s);
+ return 0;
}
int fdset_cloexec(FDSet *fds, bool b) {
return 0;
}
-int fdset_new_listen_fds(FDSet **_s, bool unset) {
+int fdset_new_listen_fds(FDSet **ret, bool unset) {
+ _cleanup_(fdset_shallow_freep) FDSet *s = NULL;
int n, fd, r;
- FDSet *s;
- assert(_s);
+ assert(ret);
/* Creates an fdset and fills in all passed file descriptors */
s = fdset_new();
- if (!s) {
- r = -ENOMEM;
- goto fail;
- }
+ if (!s)
+ return -ENOMEM;
n = sd_listen_fds(unset);
for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) {
r = fdset_put(s, fd);
if (r < 0)
- goto fail;
+ return r;
}
- *_s = s;
+ *ret = TAKE_PTR(s);
return 0;
-
-fail:
- if (s)
- set_free(MAKE_SET(s));
-
- return r;
}
int fdset_close_others(FDSet *fds) {
- void *e;
- int *a = NULL;
+ _cleanup_free_ int *a = NULL;
size_t j = 0, m;
+ void *e;
m = fdset_size(fds);
-
if (m > 0) {
- a = newa(int, m);
+ a = new(int, m);
+ if (!a)
+ return -ENOMEM;
+
SET_FOREACH(e, MAKE_SET(fds))
a[j++] = PTR_TO_FD(e);
}