1 .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
3 .\" Permission is granted to make and distribute verbatim copies of this
4 .\" manual provided the copyright notice and this permission notice are
5 .\" preserved on all copies.
7 .\" Permission is granted to copy and distribute modified versions of this
8 .\" manual under the conditions for verbatim copying, provided that the
9 .\" entire resulting derived work is distributed under the terms of a
10 .\" permission notice identical to this one.
12 .\" Since the Linux kernel and libraries are constantly changing, this
13 .\" manual page may be incorrect or out-of-date. The author(s) assume no
14 .\" responsibility for errors or omissions, or for damages resulting from
15 .\" the use of the information contained herein. The author(s) may not
16 .\" have taken the same level of care in the production of this manual,
17 .\" which is licensed free of charge, as they might when working
20 .\" Formatted or processed versions of this manual, if unaccompanied by
21 .\" the source, must acknowledge the copyright and authors of this work.
23 .\" References consulted:
24 .\" Linux libc source code
25 .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
27 .\" Modified Mon Apr 12 12:54:34 1993, David Metcalfe
28 .\" Modified Sat Jul 24 19:13:52 1993, Rik Faith (faith@cs.unc.edu)
29 .TH INDEX 3 2011-09-21 "GNU" "Linux Programmer's Manual"
31 index, rindex \- locate character in string
34 .B #include <strings.h>
36 .BI "char *index(const char *" s ", int " c );
38 .BI "char *rindex(const char *" s ", int " c );
43 function returns a pointer to the first occurrence
44 of the character \fIc\fP in the string \fIs\fP.
48 function returns a pointer to the last occurrence
49 of the character \fIc\fP in the string \fIs\fP.
51 The terminating null byte (\(aq\\0\(aq) is considered to be a part of the
58 functions return a pointer to
59 the matched character or NULL if the character is not found.
61 4.3BSD; marked as LEGACY in POSIX.1-2001.
62 POSIX.1-2008 removes the specifications of