1 .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
3 .\" %%%LICENSE_START(VERBATIM)
4 .\" Permission is granted to make and distribute verbatim copies of this
5 .\" manual provided the copyright notice and this permission notice are
6 .\" preserved on all copies.
8 .\" Permission is granted to copy and distribute modified versions of this
9 .\" manual under the conditions for verbatim copying, provided that the
10 .\" entire resulting derived work is distributed under the terms of a
11 .\" permission notice identical to this one.
13 .\" Since the Linux kernel and libraries are constantly changing, this
14 .\" manual page may be incorrect or out-of-date. The author(s) assume no
15 .\" responsibility for errors or omissions, or for damages resulting from
16 .\" the use of the information contained herein. The author(s) may not
17 .\" have taken the same level of care in the production of this manual,
18 .\" which is licensed free of charge, as they might when working
21 .\" Formatted or processed versions of this manual, if unaccompanied by
22 .\" the source, must acknowledge the copyright and authors of this work.
25 .\" References consulted:
26 .\" Linux libc source code
27 .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
29 .\" Modified Sat Jul 24 18:08:52 1993 by Rik Faith (faith@cs.unc.edu)
30 .\" Modified 2001-08-31, aeb
32 .TH STRCMP 3 2015-08-08 "" "Linux Programmer's Manual"
34 strcmp, strncmp \- compare two strings
37 .B #include <string.h>
39 .BI "int strcmp(const char *" s1 ", const char *" s2 );
41 .BI "int strncmp(const char *" s1 ", const char *" s2 ", size_t " n );
46 function compares the two strings
50 The locale is not taken into account (for a locale-aware comparison, see
52 It returns an integer less than, equal to, or greater
55 is found, respectively, to be less than,
56 to match, or be greater than
61 function is similar, except it compares
62 only the first (at most)
73 functions return an integer
74 less than, equal to, or greater than zero if
78 bytes thereof) is found, respectively, to be less than, to
79 match, or be greater than
82 For an explanation of the terms used in this section, see
88 Interface Attribute Value
92 T} Thread safety MT-Safe
95 POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.