usr/src/lib/libc/string/strcmp.3

.\" Copyright (c) 1990 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" Chris Torek.
.\"
.\" %sccs.include.redist.man%
.\"
.\"     @(#)strcmp.3    5.3 (Berkeley) %G%
.\"
.TH STRCMP 3 ""
.UC 4
.SH NAME
strcmp \- compare strings
.SH SYNOPSIS
.nf
.ft B
#include <string.h>

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

int
strncmp(const char *s1, const char *s2, size_t len);
.ft R
.fi
.SH DESCRIPTION
.B Strcmp
and
.B strncmp
compare null-terminated strings
.I s1
and
.I s2
and return an integer greater than, equal to, or less than 0,
according as
.I s1
is lexicographically greater than, equal to, or less than
.IR s2 .
The comparison is done using unsigned characters, so that '\e200'
is greater than '\e0'.
.PP
.I Strncmp
compares at most
.I len
characters.
.SH SEE ALSO
bcmp(3), memcmp(3), strcasecmp(3), strcoll(3), strxfrm(3)
.SH STANDARDS
.B Strcmp
and
.B strncmp
conform to ANSI X3.159-1989 (``ANSI C'').