INDEX(3)

NAME
index - locate character in string

LIBRARY
libc

SYNOPSIS
#include <strings.h>
char *
index(const char *s, int c);

DESCRIPTION
The index() function locates the first character matching c (converted to a char) in the nul-terminated string s.

This function is obsolete. The equivalent function strchr(3) should be used instead.

RETURN VALUES
A pointer to the character is returned if it is found; otherwise NULL is returned. If c is '\0', index() locates the terminating '\0'.

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

STANDARDS
The index() function conforms to p1003.1-2001. The p1003.1-2004 revision marked it as legacy and recommended the use of strchr(3) instead. The p1003.1-2008 revision removed index() from the specification.

HISTORY
An index() function appeared in AT&T UNIX.