X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Funistd%2Fgetcwd.c;h=f407ffe07ed6008fa4af1ce020b60df0a26a7534;hb=4554f155dd23a65fcdfd39f1d5af8af55ba37694;hp=a7b925d2dbee5a99f5ec61b77b5870ae3a839143;hpb=4fb7df12f52982412e60afeaf9c4463f78b396fc;p=musl

diff --git a/src/unistd/getcwd.c b/src/unistd/getcwd.c
index a7b925d2..f407ffe0 100644
--- a/src/unistd/getcwd.c
+++ b/src/unistd/getcwd.c
@@ -6,14 +6,20 @@
 
 char *getcwd(char *buf, size_t size)
 {
-	char tmp[PATH_MAX];
+	char tmp[buf ? 1 : PATH_MAX];
 	if (!buf) {
 		buf = tmp;
-		size = PATH_MAX;
+		size = sizeof tmp;
 	} else if (!size) {
 		errno = EINVAL;
 		return 0;
 	}
-	if (syscall(SYS_getcwd, buf, size) < 0) 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;
 }