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Command: strchr | Section: 3 | Source: OpenBSD | File: strchr.3
STRCHR(3) FreeBSD Library Functions Manual STRCHR(3)
NAME
strchr, index - locate first occurrence of a character in a string
SYNOPSIS
#include <string.h>
char *
strchr(const char *s, int c);
#include <strings.h>
char *
index(const char *s, int c);
DESCRIPTION
The strchr() function locates the first occurrence of the character c
(converted to a char) in the string s. The terminating NUL character is
considered part of the string. If c is `\0', strchr() locates the
terminating `\0'.
The index() function is an old synonym for strchr().
RETURN VALUES
The strchr() function returns a pointer to the located character or NULL
if the character does not appear in the string.
EXAMPLES
After the following call to strchr(), p will point to the string "oobar":
char *p;
char *s = "foobar";
p = strchr(s, 'o');
SEE ALSO
memchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3), strspn(3),
strstr(3), strtok(3), wcschr(3)
STANDARDS
The strchr() function conforms to ANSI X3.159-1989 ("ANSI C89").
The index() function is deprecated and shouldn't be used in new code.
HISTORY
The index() function first appeared in Version 7 AT&T UNIX. The strchr()
function first appeared in AT&T System III UNIX and was reimplemented for
4.3BSD.
FreeBSD 14.1-RELEASE-p8 December 11, 2024 FreeBSD 14.1-RELEASE-p8