add thread-pointer support for pre-2.6 kernels on i386

[musl] / src / unistd / getcwd.c

diff --git a/src/unistd/getcwd.c b/src/unistd/getcwd.c
index 2e540cd..a7b925d 100644 (file)
--- a/src/unistd/getcwd.c
+++ b/src/unistd/getcwd.c
@@ -7,7 +7,13 @@
 char *getcwd(char *buf, size_t size)
 {
        char tmp[PATH_MAX];
-       if (!buf) buf = tmp, size = PATH_MAX;
+       if (!buf) {
+               buf = tmp;
+               size = PATH_MAX;
+       } else if (!size) {
+               errno = EINVAL;
+               return 0;
+       }
        if (syscall(SYS_getcwd, buf, size) < 0) return 0;
        return buf == tmp ? strdup(buf) : buf;
 }