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Date: Sun, 6 Oct 2013 23:08:24 -0700
From: Michael Forney <mforney@...rney.org>
To: musl@...ts.openwall.com
Subject: [PATCH] getcwd: Set errno to EINVAL when size == 0
According to POSIX,
The getcwd() function shall fail if:
[EINVAL]
The size argument is 0.
[ERANGE]
The size argument is greater than 0, but is smaller than the length
of the string +1.
---
src/unistd/getcwd.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/src/unistd/getcwd.c b/src/unistd/getcwd.c
index 2e540cd..0238fa7 100644
--- a/src/unistd/getcwd.c
+++ b/src/unistd/getcwd.c
@@ -8,6 +8,10 @@ char *getcwd(char *buf, size_t size)
{
char tmp[PATH_MAX];
if (!buf) buf = tmp, size = PATH_MAX;
+ else if (size == 0) {
+ errno = EINVAL;
+ return 0;
+ }
if (syscall(SYS_getcwd, buf, size) < 0) return 0;
return buf == tmp ? strdup(buf) : buf;
}
--
1.8.4
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