205 lines
4.5 KiB
HTML
205 lines
4.5 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of STRCHR</TITLE>
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</HEAD><BODY>
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<H1>STRCHR</H1>
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Section: Linux Programmer's Manual (3)<BR>Updated: 2019-03-06<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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strchr, strrchr, strchrnul - locate character in string
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<PRE>
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<B>#include <<A HREF="file:///usr/include/string.h">string.h</A>></B>
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<B>char *strchr(const char *</B><I>s</I><B>, int </B><I>c</I><B>);</B>
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<B>char *strrchr(const char *</B><I>s</I><B>, int </B><I>c</I><B>);</B>
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<B>#define _GNU_SOURCE</B> /* See <A HREF="/cgi-bin/man/man2html?7+feature_test_macros">feature_test_macros</A>(7) */
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<B>#include <<A HREF="file:///usr/include/string.h">string.h</A>></B>
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<B>char *strchrnul(const char *</B><I>s</I><B>, int </B><I>c</I><B>);</B>
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</PRE>
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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The
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<B>strchr</B>()
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function returns a pointer to the first occurrence
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of the character
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<I>c</I>
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in the string
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<I>s</I>.
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<P>
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The
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<B>strrchr</B>()
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function returns a pointer to the last occurrence
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of the character
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<I>c</I>
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in the string
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<I>s</I>.
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<P>
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The
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<B>strchrnul</B>()
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function is like
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<B>strchr</B>()
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except that if
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<I>c</I>
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is not found in
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<I>s</I>,
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then it returns a pointer to the null byte
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at the end of
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<I>s</I>,
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rather than NULL.
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<P>
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Here "character" means "byte"; these functions do not work with
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wide or multibyte characters.
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<A NAME="lbAE"> </A>
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<H2>RETURN VALUE</H2>
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The
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<B>strchr</B>()
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and
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<B>strrchr</B>()
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functions return a pointer to
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the matched character or NULL if the character is not found.
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The terminating null byte is considered part of the string,
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so that if
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<I>c</I>
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is specified as '\0',
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these functions return a pointer to the terminator.
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<P>
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The
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<B>strchrnul</B>()
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function returns a pointer to the matched character,
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or a pointer to the null byte at the end of
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<I>s</I>
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(i.e.,
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<I>s+strlen(s)</I>)
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if the character is not found.
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<A NAME="lbAF"> </A>
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<H2>VERSIONS</H2>
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<B>strchrnul</B>()
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first appeared in glibc in version 2.1.1.
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<A NAME="lbAG"> </A>
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<H2>ATTRIBUTES</H2>
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For an explanation of the terms used in this section, see
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<B><A HREF="/cgi-bin/man/man2html?7+attributes">attributes</A></B>(7).
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<TABLE BORDER>
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<TR VALIGN=top><TD><B>Interface</B></TD><TD><B>Attribute</B></TD><TD><B>Value</B><BR></TD></TR>
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<TR VALIGN=top><TD>
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<B>strchr</B>(),
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<B>strrchr</B>(),
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<B>strchrnul</B>()
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</TD><TD>Thread safety</TD><TD>MT-Safe<BR></TD></TR>
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</TABLE>
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<A NAME="lbAH"> </A>
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<H2>CONFORMING TO</H2>
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<B>strchr</B>(),
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<B>strrchr</B>():
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POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
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<P>
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<B>strchrnul</B>()
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is a GNU extension.
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<A NAME="lbAI"> </A>
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<H2>SEE ALSO</H2>
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<B><A HREF="/cgi-bin/man/man2html?3+index">index</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+memchr">memchr</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+rindex">rindex</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+string">string</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+strlen">strlen</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+strpbrk">strpbrk</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+strsep">strsep</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+strspn">strspn</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+strstr">strstr</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+strtok">strtok</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+wcschr">wcschr</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+wcsrchr">wcsrchr</A></B>(3)
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<A NAME="lbAJ"> </A>
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<H2>COLOPHON</H2>
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This page is part of release 5.05 of the Linux
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<I>man-pages</I>
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project.
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A description of the project,
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information about reporting bugs,
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and the latest version of this page,
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can be found at
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<A HREF="https://www.kernel.org/doc/man-pages/.">https://www.kernel.org/doc/man-pages/.</A>
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="1"><A HREF="#lbAB">NAME</A><DD>
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<DT id="2"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="3"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="4"><A HREF="#lbAE">RETURN VALUE</A><DD>
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<DT id="5"><A HREF="#lbAF">VERSIONS</A><DD>
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<DT id="6"><A HREF="#lbAG">ATTRIBUTES</A><DD>
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<DT id="7"><A HREF="#lbAH">CONFORMING TO</A><DD>
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<DT id="8"><A HREF="#lbAI">SEE ALSO</A><DD>
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<DT id="9"><A HREF="#lbAJ">COLOPHON</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:05:58 GMT, March 31, 2021
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</BODY>
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