index(3)

index3

String search character

Usage

#include <strings.h>

[[deprecated]] char *index(const char *s, int c); [[deprecated]] char *rindex(const char *s, int c);

Library

Standard C library (libc, -lc)

Overview

index() is identical to strchr(3); user the latter instead.

rindex() is identical to strrchr(3); use the latter instead.

Releases

19 releases since Debian 1.1 (Buzz); the text changed 13 times.

  1. 1.1–2.2
  2. 3.0
  3. 3.1
  4. 4.0
  5. 5.0
  6. 6.0
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. Arch

Standards

None.

History

4.3BSD; marked as LEGACY in POSIX.1-2001; removed in POSIX.1-2008.

From man-pages 6.19-1 in Arch Linux 2026-11-01. Parsed by carta from the page's man source.