ustrstr (3) - Linux Manuals
ustrstr: Finds the first occurrence of a string in another one. Allegro game programming library.
NAME
ustrstr - Finds the first occurrence of a string in another one. Allegro game programming library.SYNOPSIS
#include <allegro.h>
char *ustrstr(const char *s1, const char *s2);
DESCRIPTION
This function finds the first occurrence of string `s2' in string `s1'. Example:
char *p = ustrstr("hello world", "world");