Initial version

1 files changed, 25 insertions, 0 deletions

diff --git a/src/unistd/getcwd.c b/src/unistd/getcwd.c
new file mode 100644
index 0000000..f407ffe
--- /dev/null
+++ b/src/unistd/getcwd.c
@@ -0,0 +1,25 @@
+#include <unistd.h>
+#include <errno.h>
+#include <limits.h>
+#include <string.h>
+#include "syscall.h"
+
+char *getcwd(char *buf, size_t size)
+{
+	char tmp[buf ? 1 : PATH_MAX];
+	if (!buf) {
+		buf = tmp;
+		size = sizeof tmp;
+	} else if (!size) {
+		errno = EINVAL;
+		return 0;
+	}
+	long ret = syscall(SYS_getcwd, buf, size);
+	if (ret < 0)
+		return 0;
+	if (ret == 0 || buf[0] != '/') {
+		errno = ENOENT;
+		return 0;
+	}
+	return buf == tmp ? strdup(buf) : buf;
+}