Name

strchr, strrchr, strchrnul — locate character in string

Synopsis

#include <string.h>
char *strchr( const char *s,
  int c);
 
char *strrchr( const char *s,
  int c);
 

#define _GNU_SOURCE
#include <string.h>
char *strchrnul( const char *s,
  int c);
 

DESCRIPTION

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.

RETURN VALUE

The strchr() and strrchr() functions return a pointer to the matched character or NULL if the character is not found.

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.

VERSIONS

strchrnul() first appeared in glibc in version 2.1.1.

CONFORMING TO

strchr() and strrchr() are in SVr4, 4.3BSD, C89, C99. strchrnul() is a GNU extension.

SEE ALSO

index(3), memchr(3), rindex(3), strlen(3), strpbrk(3), strsep(3), strspn(3), strstr(3), strtok(3), wcschr(3), wcsrchr(3), feature_test_macros(7)

COLOPHON

This page is part of release 3.24 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


  Copyright 1993 David Metcalfe (davidprism.demon.co.uk)

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Formatted or processed versions of this manual, if unaccompanied by
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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).