@node strstr, string
@subheading Syntax

@example
#include <string.h>

char *strstr(const char *s1, const char *s2);
@end example

@subheading Description

This function finds the first occurrence of @var{s2} in @var{s1}. 

@subheading Return Value

A pointer within @var{s1}, or @code{NULL} if @var{s2} wasn't found.

@subheading Portability

@portability ansi, posix

@subheading Example

@example
if (strstr(command, ".exe"))
  do_exe();
@end example