v7 man page for strchr

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

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	   /* See feature_test_macros(7) */
       #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 terminating null
       byte is considered part of the string, so that if c is specified as '', 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

       strchrnul() first appeared in glibc in version 2.1.1.

ATTRIBUTES

       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

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

       strchrnul() is a GNU extension.

SEE ALSO

       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

       This page is part of release 4.15 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
								    2017-09-15								 STRCHR(3)