remove another invalid skip of locking in ungetwc

[oweals/musl.git] / src / unistd / getcwd.c

diff --git a/src/unistd/getcwd.c b/src/unistd/getcwd.c
index 2e540cd41daef91efd37c7656f8f9274d4447ed6..a7b925d2dbee5a99f5ec61b77b5870ae3a839143 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;
 }