f14fb60209
* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
100 lines
2.8 KiB
Groff
100 lines
2.8 KiB
Groff
.\" Copyright (c) 1990, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" Chris Torek.
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)index.3 8.1 (Berkeley) 6/4/93
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.\" $NetBSD: index.3,v 1.15 2012/05/05 21:18:43 dholland Exp $
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.\"
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.Dd May 5, 2012
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.Dt INDEX 3
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.Os
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.Sh NAME
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.Nm index
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.Nd locate character in string
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In strings.h
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.Ft char *
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.Fn index "const char *s" "int c"
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.Sh DESCRIPTION
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The
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.Fn index
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function
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locates the first character matching
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.Fa c
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(converted to a
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.Em char )
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in the nul-terminated string
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.Fa s .
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.Pp
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This function is obsolete.
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The equivalent function
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.Xr strchr 3
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should be used instead.
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.Sh RETURN VALUES
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A pointer to the character is returned if it is found; otherwise
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.Dv NULL
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is returned.
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If
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.Fa c
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is '\e0',
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.Fn index
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locates the terminating '\e0'.
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.Sh SEE ALSO
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.Xr memchr 3 ,
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.Xr rindex 3 ,
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.Xr strchr 3 ,
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.Xr strcspn 3 ,
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.Xr strpbrk 3 ,
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.Xr strrchr 3 ,
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.Xr strsep 3 ,
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.Xr strspn 3 ,
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.Xr strstr 3 ,
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.Xr strtok 3
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.Sh STANDARDS
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The
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.Fn index
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function conforms to
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.St -p1003.1-2001 .
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The
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.St -p1003.1-2004
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revision marked it as legacy and recommended the use of
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.Xr strchr 3
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instead.
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The
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.St -p1003.1-2008
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revision removed
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.Fn index
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from the specification.
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.Sh HISTORY
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An
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.Fn index
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function appeared in
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.At v6 .
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