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Diffstat (limited to 'src/dirent/scandir.c')
-rw-r--r--src/dirent/scandir.c50
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);