INDEX(3)               FreeBSD Library Functions Manual               INDEX(3)

NAME
     index, rindex - locate character in string

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <strings.h>

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

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

DESCRIPTION
     The index() and rindex() functions have been deprecated in favor of
     strchr(3) and strrchr(3).

     The index() function locates the first occurrence of c (converted to a
     char) in the string pointed to by s.  The terminating null character is
     considered part of the string; therefore if c is `\0', the functions
     locate the terminating `\0'.

     The rindex() function is identical to index(), except it locates the last
     occurrence of c.

RETURN VALUES
     The functions index() and rindex() return a pointer to the located
     character, or NULL if the character does not appear in the string.

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

HISTORY
     The index() and rindex() functions appeared in Version 6 AT&T UNIX.
     Their prototypes existed previously in <string.h> before they were moved
     to <strings.h> for IEEE Std 1003.1-2001 ("POSIX.1") compliance.  The
     functions are not specified by IEEE Std 1003.1-2008 ("POSIX.1").

FreeBSD 13.1-RELEASE-p6         March 20, 2011         FreeBSD 13.1-RELEASE-p6