php-src/ext/standard/link.c

/*
   +----------------------------------------------------------------------+
   | PHP version 4.0                                                      |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997, 1998, 1999 The PHP Group                         |
   +----------------------------------------------------------------------+
   | This source file is subject to version 2.0 of the PHP license,       |
   | that is bundled with this package in the file LICENSE, and is        |
   | available at through the world-wide-web at                           |
   | http://www.php.net/license/2_0.txt.                                  |
   | If you did not receive a copy of the PHP license and are unable to   |
   | obtain it through the world-wide-web, please send a note to          |
   | license@php.net so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Authors:                                                             |
   +----------------------------------------------------------------------+
 */

/* $Id$ */

#include "php.h"
#include "php3_filestat.h"
#include "php_globals.h"

#include <stdlib.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <sys/stat.h>
#include <string.h>
#if HAVE_PWD_H
#if MSVC5
#include "win32/pwd.h"
#else
#include <pwd.h>
#endif
#endif
#if HAVE_GRP_H
#if MSVC5
#include "win32/grp.h"
#else
#include <grp.h>
#endif
#endif
#include <errno.h>
#include <ctype.h>

#include "safe_mode.h"
#include "php3_link.h"

/* {{{ proto string readlink(string filename)
   Return the target of a symbolic link */
PHP_FUNCTION(readlink)
{
#if HAVE_SYMLINK
	pval *filename;
	char buff[256];
	int ret;

	if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &filename) == FAILURE) {
		WRONG_PARAM_COUNT;
	}
	convert_to_string(filename);

	ret = readlink(filename->value.str.val, buff, 255);
	if (ret == -1) {
		php_error(E_WARNING, "readlink failed (%s)", strerror(errno));
		RETURN_FALSE;
	}
	/* Append NULL to the end of the string */
	buff[ret] = '\0';
	RETURN_STRING(buff,1);
#endif
}
/* }}} */

/* {{{ proto int linkinfo(string filename)
   Returns the st_dev field of the UNIX C stat structure describing the link */
PHP_FUNCTION(linkinfo)
{
#if HAVE_SYMLINK
	pval *filename;
	struct stat sb;
	int ret;

	if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &filename) == FAILURE) {
		WRONG_PARAM_COUNT;
	}
	convert_to_string(filename);

	ret = lstat(filename->value.str.val, &sb);
	if (ret == -1) {
		php_error(E_WARNING, "LinkInfo failed (%s)", strerror(errno));
		RETURN_LONG(-1L);
	}
	RETURN_LONG((long) sb.st_dev);
#endif
}
/* }}} */

/* {{{ proto int symlink(string target, string link)
   Create a symbolic link */
PHP_FUNCTION(symlink)
{
#if HAVE_SYMLINK
	pval *topath, *frompath;
	int ret;
	PLS_FETCH();

	if (ARG_COUNT(ht) != 2 || getParameters(ht, 2, &topath, &frompath) == FAILURE) {
		WRONG_PARAM_COUNT;
	}
	convert_to_string(topath);
	convert_to_string(frompath);

	if (PG(safe_mode) && !_php3_checkuid(topath->value.str.val, 2)) {
		RETURN_FALSE;
	}

	ret = symlink(topath->value.str.val, frompath->value.str.val);
	if (ret == -1) {
		php_error(E_WARNING, "SymLink failed (%s)", strerror(errno));
		RETURN_FALSE;
	}
	RETURN_TRUE;
#endif
}
/* }}} */

/* {{{ proto int link(string target, string link)
   Create a hard link */
PHP_FUNCTION(link)
{
#if HAVE_LINK
	pval *topath, *frompath;
	int ret;
	PLS_FETCH();

	if (ARG_COUNT(ht) != 2 || getParameters(ht, 2, &topath, &frompath) == FAILURE) {
		WRONG_PARAM_COUNT;
	}
	convert_to_string(topath);
	convert_to_string(frompath);

	if (PG(safe_mode) && !_php3_checkuid(topath->value.str.val, 2)) {
		RETURN_FALSE;
	}

	ret = link(topath->value.str.val, frompath->value.str.val);
	if (ret == -1) {
		php_error(E_WARNING, "Link failed (%s)", strerror(errno));
		RETURN_FALSE;
	}
	RETURN_TRUE;
#endif
}
/* }}} */

/* {{{ proto int unlink(string filename)
   Delete a file */
PHP_FUNCTION(unlink)
{
	pval *filename;
	int ret;
	PLS_FETCH();
	
	if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &filename) == FAILURE) {
		WRONG_PARAM_COUNT;
	}
	convert_to_string(filename);

	if (PG(safe_mode) && !_php3_checkuid(filename->value.str.val, 2)) {
		RETURN_FALSE;
	}

	ret = unlink(filename->value.str.val);
	if (ret == -1) {
		php_error(E_WARNING, "Unlink failed (%s)", strerror(errno));
		RETURN_FALSE;
	}
	/* Clear stat cache */
	php3_clearstatcache(INTERNAL_FUNCTION_PARAM_PASSTHRU);
	RETURN_TRUE;
}
/* }}} */


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 * tab-width: 4
 * c-basic-offset: 4
 * End:
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