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-rw-r--r--lib/compat/scandir.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/lib/compat/scandir.c b/lib/compat/scandir.c
new file mode 100644
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--- /dev/null
+++ b/lib/compat/scandir.c
@@ -0,0 +1,99 @@
+/*
+ * libcompat - system compatibility library
+ *
+ * Copyright © 1995 Ian Jackson <ijackson@chiark.greenend.org.uk>
+ * Copyright © 2008, 2009 Guillem Jover <guillem@debian.org>
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+
+#include <string.h>
+#include <dirent.h>
+#include <stdlib.h>
+
+#include "compat.h"
+
+static int
+cleanup(DIR *dir, struct dirent **dirlist, int used)
+{
+ if (dir)
+ closedir(dir);
+
+ if (dirlist) {
+ int i;
+
+ for (i = 0; i < used; i++)
+ free(dirlist[i]);
+ free(dirlist);
+ }
+
+ return -1;
+}
+
+int
+scandir(const char *dir, struct dirent ***namelist,
+ int (*filter)(const struct dirent *),
+ int (*cmp)(const void *, const void *))
+{
+ DIR *d;
+ struct dirent *e, *m, **list;
+ int used, avail;
+
+ d = opendir(dir);
+ if (!d)
+ return -1;
+
+ list = NULL;
+ used = avail = 0;
+
+ while ((e = readdir(d)) != NULL) {
+ if (filter != NULL && !filter(e))
+ continue;
+
+ if (used >= avail - 1) {
+ struct dirent **newlist;
+
+ if (avail)
+ avail *= 2;
+ else
+ avail = 20;
+ newlist = realloc(list, avail * sizeof(*newlist));
+ if (!newlist)
+ return cleanup(d, list, used);
+ list = newlist;
+ }
+
+ m = malloc(sizeof(*m) + strlen(e->d_name));
+ if (!m)
+ return cleanup(d, list, used);
+ *m = *e;
+ strcpy(m->d_name, e->d_name);
+
+ list[used] = m;
+ used++;
+ }
+
+ closedir(d);
+
+ if (list != NULL && cmp != NULL)
+ qsort(list, used, sizeof(list[0]), cmp);
+
+ *namelist = list;
+
+ return used;
+}