1.\" Copyright (c) 1990, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" Chris Torek. 6.\" %sccs.include.redist.man% 7.\" 8.\" @(#)strcasecmp.3 8.1 (Berkeley) 06/09/93 9.\" 10.Dd 11.Dt STRCASECMP 3 12.Os 13.Sh NAME 14.Nm strcasecmp 15.Nd compare strings, ignoring case 16.Sh SYNOPSIS 17.Fd #include <string.h> 18.Ft int 19.Fn strcasecmp "const char *s1" "const char *s2" 20.Ft int 21.Fn strncasecmp "const char *s1" "const char *s2" "size_t len" 22.Sh DESCRIPTION 23The 24.Fn strcasecmp 25and 26.Fn strncasecmp 27functions 28compare the null-terminated strings 29.Fa s1 30and 31.Fa s2 32and return an integer greater than, equal to, or less than 0, 33according as 34.Fa s1 35is lexicographically greater than, equal to, or less than 36.Fa s2 37after translation of each corresponding character to lower-case. 38The strings themselves are not modified. 39The comparison is done using unsigned characters, so that 40.Sq Li \e200 41is greater than 42.Ql \e0 . 43.Pp 44The 45.Fn strncasecmp 46compares at most 47.Fa len 48characters. 49.Sh SEE ALSO 50.Xr bcmp 3 , 51.Xr memcmp 3 , 52.Xr strcmp 3 , 53.Xr strcoll 3 , 54.Xr strxfrm 3 55.Sh HISTORY 56The 57.Fn strcasecmp 58and 59.Fn strncasecmp 60functions first appeared in 4.4BSD. 61