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

NAME

       strstr - locate a substring

SYNOPSIS

       #include <string.h>

       char *strstr(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.

RETURN VALUE

       The strstr() function returns a pointer to the beginning of the substring, or NULL if the substring is not found.

BUGS

       Early versions of Linux libc (like 4.5.26) would not allow an empty argument. Later versions  (like  4.6.27)  work  correctly,  and  return
       haystack when needle is empty.

CONFORMING TO

       ISO 9899

SEE ALSO

       index(3), memchr(3), rindex(3), strchr(3), strpbrk(3), strsep(3), strspn(3), strtok(3)

GNU
								    1993-04-12								 STRSTR(3)