strchr, strrchr, strchrnul — locate character in string
#include <string.h>
char
*strchr( |
const char *s, |
int c); |
char
*strrchr( |
const char *s, |
int c); |
#define _GNU_SOURCE /* See feature_test_macros(7) */ #include <string.h>
char
*strchrnul( |
const char *s, |
int c); |
The strchr() function
returns a pointer to the first occurrence of the character
c in the string
s.
The strrchr() function
returns a pointer to the last occurrence of the character
c in the string
s.
The strchrnul() function is
like strchr() except that if
c is not found in
s, then it returns a
pointer to the null byte at the end of s, rather than NULL.
Here "character" means "byte"; these functions do not work with wide or multibyte characters.
The strchr() and
strrchr() functions return a
pointer to the matched character or NULL if the character is
not found. The terminating null byte is considered part of
the string, so that if c is specified as '\0', these
functions return a pointer to the terminator.
The strchrnul() function
returns a pointer to the matched character, or a pointer to
the null byte at the end of s (i.e., s+strlen(s)) if the character
is not found.
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
strchr(), strrchr(), strchrnul() |
Thread safety | MT-Safe |
strchr(), strrchr(): POSIX.1-2001, POSIX.1-2008, C89,
C99, SVr4, 4.3BSD.
strchrnul() is a GNU
extension.
index(3), memchr(3), rindex(3), string(3), strlen(3), strpbrk(3), strsep(3), strspn(3), strstr(3), strtok(3), wcschr(3), wcsrchr(3)
This page is part of release 4.07 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
https://www.kernel.org/doc/man−pages/.
|
Copyright 1993 David Metcalfe (davidprism.demon.co.uk) %%%LICENSE_START(VERBATIM) Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one. Since the Linux kernel and libraries are constantly changing, this manual page may be incorrect or out-of-date. The author(s) assume no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein. The author(s) may not have taken the same level of care in the production of this manual, which is licensed free of charge, as they might when working professionally. Formatted or processed versions of this manual, if unaccompanied by the source, must acknowledge the copyright and authors of this work. %%%LICENSE_END References consulted: Linux libc source code Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) 386BSD man pages Modified Mon Apr 12 12:51:24 1993, David Metcalfe 2006-05-19, Justin Pryzby <pryzbyjjustinpryzby.com> Document strchrnul(3). |