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Message-ID: <20191218025132.111684-1-liujie1@huawei.com>
Date: Wed, 18 Dec 2019 10:51:32 +0800
From: Liu Jie <liujie1@...wei.com>
To: <musl@...ts.openwall.com>
CC: <yunlong.song@...wei.com>, <liujie1@...wei.com>
Subject: [PATCH] coresight: getcwd: modify the processing of parameters
According to POSIX 2008, 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.
The size should not be assigned, even if buf is NULL, otherwise
the error ERANGE cannot be correctly judged.
Signed-off-by: Liu Jie <liujie1@...wei.com>
---
src/unistd/getcwd.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/src/unistd/getcwd.c b/src/unistd/getcwd.c
index f407ffe0..ee2e97e9 100644
--- a/src/unistd/getcwd.c
+++ b/src/unistd/getcwd.c
@@ -9,8 +9,8 @@ char *getcwd(char *buf, size_t size)
char tmp[buf ? 1 : PATH_MAX];
if (!buf) {
buf = tmp;
- size = sizeof tmp;
- } else if (!size) {
+ }
+ if (!size) {
errno = EINVAL;
return 0;
}
--
2.17.1
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