strstr

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 nee-
       dle in the string haystack.  The terminating `\0'  characters  are  not
       compared.

RETURN VALUE
       The  strstr()  function  returns a pointer to the beginning of the sub-
       string, 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),  str-
       spn(3), strtok(3)



GNU                               1993-04-12                         STRSTR(3)