NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | VERSIONS | ATTRIBUTES | CONFORMING TO | SEE ALSO | COLOPHON

STRCHR(3)                 Linux Programmer's Manual                STRCHR(3)

NAME         top

       strchr, strrchr, strchrnul - locate character in string

SYNOPSIS         top

       #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);

DESCRIPTION         top

       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         top

       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.

VERSIONS         top

       strchrnul() first appeared in glibc in version 2.1.1.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).

       ┌─────────────────────────────────┬───────────────┬─────────┐
       │Interface                        Attribute     Value   │
       ├─────────────────────────────────┼───────────────┼─────────┤
       │strchr(), strrchr(), strchrnul() │ Thread safety │ MT-Safe │
       └─────────────────────────────────┴───────────────┴─────────┘

CONFORMING TO         top

       strchr(), strrchr(): POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4,
       4.3BSD.

       strchrnul() is a GNU extension.

SEE ALSO         top

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

COLOPHON         top

       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/.

GNU                              2015-08-08                        STRCHR(3)