STRCASECMP
Section: Linux Programmer's Manual (3)
Updated: 2014-05-10
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NAME
strcasecmp, strncasecmp - compare two strings ignoring case
SYNOPSIS
#include <strings.h>
int strcasecmp(const char *s1, const char *s2);
int strncasecmp(const char *s1, const char *s2, size_t n);
DESCRIPTION
The
strcasecmp()
function compares the two strings
s1
and
s2,
ignoring the case of the characters.
It returns an integer
less than, equal to, or greater than zero if
s1
is found,
respectively, to be less than, to match, or be greater than
s2.
The
strncasecmp()
function is similar, except it compares
the only first
n
bytes of
s1.
RETURN VALUE
The
strcasecmp()
and
strncasecmp()
functions return
an integer less than, equal to, or greater than zero if
s1
(or the first
n
bytes thereof) is found, respectively, to be
less than, to match, or be greater than
s2.
CONFORMING TO
4.4BSD, POSIX.1-2001.
NOTES
The
strcasecmp()
and
strncasecmp()
functions first appeared in 4.4BSD, where they were declared in
<string.h>.
Thus, for reasons of historical compatibility, the glibc
<string.h>
header file also declares these functions, if the
_DEFAULT_SOURCE
(or, in glibc 2.19 and earlier,
_BSD_SOURCE)
feature test macro is defined.
SEE ALSO
bcmp(3),
memcmp(3),
strcmp(3),
strcoll(3),
string(3),
strncmp(3),
wcscasecmp(3),
wcsncasecmp(3)
COLOPHON
This page is part of release 3.74 of the Linux
man-pages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
http://www.kernel.org/doc/man-pages/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- CONFORMING TO
-
- NOTES
-
- SEE ALSO
-
- COLOPHON
-