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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "dirent-util.h"
#include "errno-util.h"
#include "glob-util.h"
#include "macro.h"
#include "path-util.h"
#include "strv.h"
static void closedir_wrapper(void* v) {
(void) closedir(v);
}
int safe_glob(const char *path, int flags, glob_t *pglob) {
int k;
/* We want to set GLOB_ALTDIRFUNC ourselves, don't allow it to be set. */
assert(!(flags & GLOB_ALTDIRFUNC));
if (!pglob->gl_closedir)
pglob->gl_closedir = closedir_wrapper;
if (!pglob->gl_readdir)
pglob->gl_readdir = (struct dirent *(*)(void *)) readdir_no_dot;
if (!pglob->gl_opendir)
pglob->gl_opendir = (void *(*)(const char *)) opendir;
if (!pglob->gl_lstat)
pglob->gl_lstat = lstat;
if (!pglob->gl_stat)
pglob->gl_stat = stat;
errno = 0;
k = glob(path, flags | GLOB_ALTDIRFUNC, NULL, pglob);
if (k == GLOB_NOMATCH)
return -ENOENT;
if (k == GLOB_NOSPACE)
return -ENOMEM;
if (k != 0)
return errno_or_else(EIO);
if (strv_isempty(pglob->gl_pathv))
return -ENOENT;
return 0;
}
int glob_first(const char *path, char **ret_first) {
_cleanup_globfree_ glob_t g = {};
int k;
assert(path);
k = safe_glob(path, GLOB_NOSORT|GLOB_BRACE, &g);
if (k == -ENOENT) {
if (ret_first)
*ret_first = NULL;
return false;
}
if (k < 0)
return k;
if (ret_first) {
assert(g.gl_pathv && g.gl_pathv[0]);
char *first = strdup(g.gl_pathv[0]);
if (!first)
return log_oom_debug();
*ret_first = first;
}
return true;
}
int glob_extend(char ***strv, const char *path, int flags) {
_cleanup_globfree_ glob_t g = {};
int k;
k = safe_glob(path, GLOB_NOSORT|GLOB_BRACE|flags, &g);
if (k < 0)
return k;
return strv_extend_strv(strv, g.gl_pathv, false);
}
int glob_non_glob_prefix(const char *path, char **ret) {
/* Return the path of the path that has no glob characters. */
size_t n = strcspn(path, GLOB_CHARS);
if (path[n] != '\0')
while (n > 0 && path[n-1] != '/')
n--;
if (n == 0)
return -ENOENT;
char *ans = strndup(path, n);
if (!ans)
return -ENOMEM;
*ret = ans;
return 0;
}
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