1 files changed, 50 insertions, 0 deletions
diff --git a/src/dirent/scandir.c b/src/dirent/scandir.c
new file mode 100644
index 00000000..6a0a9993
--- /dev/null
+++ b/src/dirent/scandir.c
@@ -0,0 +1,50 @@
+#include <dirent.h>
+#include <string.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <stddef.h>
+#include <libc.h>
+
+int scandir(const char *path, struct dirent ***res,
+	int (*sel)(const struct dirent *),
+	int (*cmp)(const struct dirent **, const struct dirent **))
+{
+	DIR *d = opendir(path);
+	struct dirent *de, **names=0, **tmp;
+	size_t cnt=0, len=0, size;
+	int old_errno = errno;
+
+	if (!d) return -1;
+
+	while ((errno=0), (de = readdir(d))) {
+		if (sel && !sel(de)) continue;
+		if (cnt >= len) {
+			len = 2*len+1;
+			if (len > SIZE_MAX/sizeof *names) break;
+			tmp = realloc(names, len * sizeof *names);
+			if (!tmp) break;
+			names = tmp;
+		}
+		size = offsetof(struct dirent,d_name) + strlen(de->d_name) + 1;
+		names[cnt] = malloc(size);
+		if (!names[cnt]) break;
+		memcpy(names[cnt++], de, size);
+	}
+
+	closedir(d);
+
+	if (errno) {
+		old_errno = errno;
+		if (names) while (cnt-->0) free(names[cnt]);
+		free(names);
+		errno = old_errno;
+		return -1;
+	}
+
+	if (cmp) qsort(names, cnt, sizeof *names, (int (*)(const void *, const void *))cmp);
+	*res = names;
+	return cnt;
+}
+
+LFS64(scandir);