index(3) - NetBSD Manual Pages

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INDEX(3)                NetBSD Library Functions Manual               INDEX(3)


NAME
index -- locate character in string
LIBRARY
Standard C Library (libc, -lc)
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function locates the first character matching c (converted to a char) in the nul-terminated string s. This function is obsolete.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 IEEE Std 1003.1-2001 (``POSIX.1''). The IEEE Std 1003.1-2004 (``POSIX.1'') revision marked it as legacy and rec- ommended the use of strchr(3) instead. The IEEE Std 1003.1-2008 (``POSIX.1'') revision removed index() from the specification.
HISTORY
An index() function appeared in Version 6 AT&T UNIX. NetBSD 9.1 May 5, 2012 NetBSD 9.1
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