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
   strrchr(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 4.09 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/.

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