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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | VERSIONS | ATTRIBUTES | CONFORMING TO | SEE ALSO | COLOPHON |
STRCHR(3) Linux Programmer's Manual STRCHR(3)
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.
strchrnul() first appeared in glibc in version 2.1.1.
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 4.12 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/.
GNU 2015-08-08 STRCHR(3)
Pages that refer to this page: index(3), memchr(3), string(3), strpbrk(3), strsep(3), strspn(3), strstr(3), strtok(3), wcschr(3), wcsrchr(3), signal-safety(7)