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  charac‐
       ters.

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 '\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
       strchrnul() first appeared in glibc in version 2.1.1.

ATTRIBUTES
   Multithreading (see pthreads(7))
       The strchr(), strrchr(), and strchrnul() functions are thread-safe.

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), 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 3.74 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 http://www.kernel.org/doc/man-pages/.



GNU                                         2014-01-20                                  STRCHR(3)