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



NAME
       index, rindex - locate character in string

SYNOPSIS
       #include <strings.h>

       char *index(const char *s, int c);

       char *rindex(const char *s, int c);

DESCRIPTION
       The  index()  function returns a pointer to the first occurrence of the
       character c in the string s.

       The rindex() function returns a pointer to the last occurrence  of  the
       character c in the string s.

       The  terminating  null  byte  ('\0')  is considered to be a part of the
       strings.

RETURN VALUE
       The index() and rindex() functions return  a  pointer  to  the  matched
       character or NULL if the character is not found.

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

       +------------------+---------------+---------+
       |Interface         | Attribute     | Value   |
       +------------------+---------------+---------+
       |index(), rindex() | Thread safety | MT-Safe |
       +------------------+---------------+---------+
CONFORMING TO
       4.3BSD; marked as LEGACY in  POSIX.1-2001.   POSIX.1-2008  removes  the
       specifications of index() and rindex(), recommending strchr(3) and str-
       rchr(3) instead.

SEE ALSO
       memchr(3), strchr(3),  string(3),  strpbrk(3),  strrchr(3),  strsep(3),
       strspn(3), strstr(3), strtok(3)

COLOPHON
       This  page  is  part of release 4.16 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                               2015-03-02                          INDEX(3)