Add readlink and readmagiclink functions

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 41 insertions, 0 deletions

diff --git a/readlinkat.c b/readlinkat.c
new file mode 100644
index 0000000..2ec5e88
--- /dev/null
+++ b/readlinkat.c
@@ -0,0 +1,41 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+#ifndef TEST
+
+
+char *
+libsimple_readlinkat(int dirfd, const char *path)
+{
+	char *ret = NULL, *new;
+	size_t size = 0;
+	ssize_t r;
+
+	do {
+		new = realloc(ret, size += 128);
+		if (!new) {
+			errno = ENOMEM;
+		fail:
+			free(ret);
+			return NULL;
+		}
+		ret = new;
+		r = readlinkat(dirfd, path, ret, size - 1U);
+		if (r < 0)
+			goto fail;
+	} while ((size_t)r >= size - 2U);
+
+	ret[r] = '\0';
+	return ret;
+}
+
+
+#else
+#include "test.h"
+
+int
+main(void) /* TODO test */
+{
+	return 0;
+}
+
+#endif