ref: 3b8e22be8e01e95eddeeb9a1949b897df9b3f869
dir: /doc/man3/strstr.3/
.TH strstr 3 .SH NAME strstr - find substring in string .SH SYNOPSIS #include <string.h> char *strstr(const char *s1, const char *s2) .SH DESCRIPTION The .BR strstr () function locates the first occurence in the string pointed to by .I s1 of the sequence of characters (excluding the terminating null character) in the string pointed to by .IR s2 . .SH RETURN VALUE The .BR strchr () function shall return a pointer to the located string or a null pointer if .I s2 is not found. .PP If .I s2 points to an empty string, the function returns .IR s1 . .SH STANDARDS ISO/IEC 9899:1999 Section 7.21.5.7