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You are here: manpages





STRSTR

Section: Linux Programmer's Manual (3)
Updated: 2015-03-02
Index Return to Main Contents
 

NAME

strstr, strcasestr - locate a substring  

SYNOPSIS

#include <string.h>

char *strstr(const char *haystack, const char *needle);

#define _GNU_SOURCE         /* See feature_test_macros(7) */

#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 null bytes (aq\0aq) 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 located substring, or NULL if the substring is not found.  

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).
InterfaceAttributeValue
strstr() Thread safetyMT-Safe
strcasestr() Thread safetyMT-Safe locale
 

CONFORMING TO

The strstr() function conforms to C89 and C99. The strcasestr() function is a nonstandard extension.  

SEE ALSO

index(3), memchr(3), memmem(3), rindex(3), strcasecmp(3), strchr(3), string(3), strpbrk(3), strsep(3), strspn(3), strtok(3), wcsstr(3)  

COLOPHON

This page is part of release 3.81 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ATTRIBUTES
CONFORMING TO
SEE ALSO
COLOPHON


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