strstr(3)

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 (‘