strcasecmp() -- compare two strings, ignoring case

SYNOPSIS

#include <string.h>

int strcasecmp(const char *s1, const char *s2);

DESCRIPTION

The strcasecmp() routine does a case-insensitive string comparison between the strings referenced by the pointers s1 and s2.

PARAMETERS

s1: Is the null-terminated string to be compared.
s2: Is the null-terminated string to be compared.

The function strcasecmp() returns a positive integer if, disregarding case, string s1 is lexically greater than string s2; zero if, other than case the two strings are identical; and a negative integer if, disregarding case, string s1 is lexically less than string s2.