linux man page for strcasestr

Query: strcasestr

OS: linux

Section: 3

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

STRSTR(3)						     Linux Programmer's Manual							 STRSTR(3)

NAME
strstr, strcasestr - locate a substring
SYNOPSIS
#include <string.h> char *strstr(const char *haystack, const char *needle); #define _GNU_SOURCE #include <string.h> char *strcasestr(const char *haystack, const char *needle);
DESCRIPTION
The strstr() function finds the first occurrence of the substring needle in the string haystack. The terminating '' characters are not compared. The strcasestr() function is like strstr(), but ignores the case of both arguments.
RETURN VALUE
These functions return a pointer to the beginning of the substring, or NULL if the substring is not found.
CONFORMING TO
The strstr() function conforms to C89 and C99. The strcasestr() function is a nonstandard extension.
BUGS
Early versions of Linux libc (like 4.5.26) would not allow an empty needle argument for strstr(). Later versions (like 4.6.27) work cor- rectly, and return haystack when needle is empty.
SEE ALSO
index(3), memchr(3), rindex(3), strcasecmp(3), strchr(3), string(3), strpbrk(3), strsep(3), strspn(3), strtok(3), wcsstr(3), fea- ture_test_macros(7)
COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.
GNU
2010-09-20 STRSTR(3)
Related Man Pages
string(3) - centos
strcasestr_l(3) - freebsd
string(3) - linux
strstr(3) - freebsd
strcasestr(3) - osx
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