musl - musl - an implementation of the standard library for Linux-based systems

musl - an implementation of the standard library for Linux-based systems

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author	Rich Felker <dalias@aerifal.cx>	2025年05月16日 09:10:19 -0400
committer	Rich Felker <dalias@aerifal.cx>	2025年05月16日 09:11:14 -0400
commit	ae3a8c93a663b553e65f096498937083dad210d2 (patch)
tree	f30256d8ada8b92a9a48daf7676565d6ee593ac4 /src
parent	23febbd3c5d6b4e367faee4f39b8e8c3b95ab588 (diff)
download	musl-ae3a8c93a663b553e65f096498937083dad210d2.tar.gz

fix strcasestr failing to find zero-length needle

the loop condition ending on end-of-haystack ends before a zero-length needle can be matched, so just explicitly check it before the loop.

Diffstat (limited to 'src')

-rw-r--r--

1 files changed, 1 insertions, 0 deletions

diff --git a/src/string/strcasestr.c b/src/string/strcasestr.c
index af109f36..dc598bc3 100644
--- a/src/string/strcasestr.c
+++ b/src/string/strcasestr.c

@@ -4,6 +4,7 @@

char *strcasestr(const char *h, const char *n)

{

size_t l = strlen(n);

+ if (!l) return (char *)h;

for (; *h; h++) if (!strncasecmp(h, n, l)) return (char *)h;

return 0;

}

generated by cgit v1.2.1 (git 2.18.0) at 2025年09月21日 08:43:46 +0000