/* 

   Unix SMB/CIFS implementation.

   replacement routines for broken systems

   Copyright (C) Andrew Tridgell 1992-1998

   Copyright (C) Jelmer Vernooij 2005-2008

     ** NOTE! The following LGPL license applies to the replace

     ** library. This does NOT imply that all of Samba is released

     ** under the LGPL

   This library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 3 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with this library; if not, see <http://www.gnu.org/licenses/>.

*/

#include <sys/types.h>

#include <string.h>

#include <pwd.h>

#include "util.h"

/* glibc doesn't have strlcpy, strlcat. Ensure we do. JRA. We

 * don't link to libreplace so need them here. */

/* like strncpy but does not 0 fill the buffer and always null

 *    terminates. bufsize is the size of the destination buffer */

#ifndef HAVE_STRLCPY

size_t strlcpy(char *d, const char *s, size_t bufsize)

{

	size_t len = strlen(s);

	size_t ret = len;

	if (bufsize <= 0) return 0;

	if (len >= bufsize) len = bufsize-1;

	memcpy(d, s, len);

	d[len] = 0;

	return ret;

}

#endif

/* like strncat but does not 0 fill the buffer and always null

 *    terminates. bufsize is the length of the buffer, which should

 *       be one more than the maximum resulting string length */

#ifndef HAVE_STRLCAT

size_t strlcat(char *d, const char *s, size_t bufsize)

{

	size_t len1 = strlen(d);

	size_t len2 = strlen(s);

	size_t ret = len1 + len2;

	if (len1+len2 >= bufsize) {

		if (bufsize < (len1+1)) {

			return ret;

		}

		len2 = bufsize - (len1+1);

	}

	if (len2 > 0) {

		memcpy(d+len1, s, len2);

		d[len1+len2] = 0;

	}

	return ret;

}

#endif

/* caller frees username if necessary */

char *

getusername(uid_t uid)

{

	char *username = NULL;

	struct passwd *password = getpwuid(uid);

	if (password)

		username = password->pw_name;

	return username;

}