ref: 27598a9c874c115795a3d59de093f8f158a73d87
dir: /libkern/strstr.c/
#include <lib9.h> /* * Return pointer to first occurrence of s2 in s1, * 0 if none */ char* strstr(char *s1, char *s2) { char *p; int f, n; f = s2[0]; if(f == 0) return s1; n = strlen(s2); for(p=strchr(s1, f); p; p=strchr(p+1, f)) if(strncmp(p, s2, n) == 0) return p; return 0; }