shadow/lib/sgetspent.c

/*
 * Copyright 1989 - 1994, Julianne Frances Haugh
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of Julianne F. Haugh nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <config.h>

#ifdef SHADOWPWD	/*{*/

#include "rcsid.h"
RCSID("$Id: sgetspent.c,v 1.5 1998/04/02 21:51:47 marekm Exp $")

#include <sys/types.h>
#include "prototypes.h"
#include "defines.h"
#include <stdio.h>

#define	FIELDS	9
#define	OFIELDS	5

/*
 * sgetspent - convert string in shadow file format to (struct spwd *)
 */

struct spwd *
sgetspent(const char *string)
{
	static char spwbuf[1024];
	static struct spwd spwd;
	char	*fields[FIELDS];
	char	*cp;
	char	*cpp;
	int	i;

	/*
	 * Copy string to local buffer.  It has to be tokenized and we
	 * have to do that to our private copy.
	 */

	if (strlen(string) >= sizeof spwbuf)
		return 0;  /* fail if too long */
	strcpy(spwbuf, string);

	if ((cp = strrchr (spwbuf, '\n')))
		*cp = '\0';

	/*
	 * Tokenize the string into colon separated fields.  Allow up to
	 * FIELDS different fields.
	 */

	for (cp = spwbuf, i = 0;*cp && i < FIELDS;i++) {
		fields[i] = cp;
		while (*cp && *cp != ':')
			cp++;

		if (*cp)
			*cp++ = '\0';
	}

	/*
	 * It is acceptable for the last SVR4 field to be blank.  This
	 * results in the loop being terminated early.  In which case,
	 * we just make the last field be blank and be done with it.
	 */

	if (i == (FIELDS-1))
		fields[i++] = cp;

	if ((cp && *cp) || (i != FIELDS && i != OFIELDS))
		return 0;

	/*
	 * Start populating the structure.  The fields are all in
	 * static storage, as is the structure we pass back.
	 */

	spwd.sp_namp = fields[0];
	spwd.sp_pwdp = fields[1];

	/*
	 * Get the last changed date.  For all of the integer fields,
	 * we check for proper format.  It is an error to have an
	 * incorrectly formatted number.
	 */

	if ((spwd.sp_lstchg = strtol (fields[2], &cpp, 10)) == 0 && *cpp) {
		return 0;
	} else if (fields[2][0] == '\0')
		spwd.sp_lstchg = -1;

	/*
	 * Get the minimum period between password changes.
	 */

	if ((spwd.sp_min = strtol (fields[3], &cpp, 10)) == 0 && *cpp) {
		return 0;
	} else if (fields[3][0] == '\0')
		spwd.sp_min = -1;

	/*
	 * Get the maximum number of days a password is valid.
	 */

	if ((spwd.sp_max = strtol (fields[4], &cpp, 10)) == 0 && *cpp) {
		return 0;
	} else if (fields[4][0] == '\0')
		spwd.sp_max = -1;

	/*
	 * If there are only OFIELDS fields (this is a SVR3.2 /etc/shadow
	 * formatted file), initialize the other field members to -1.
	 */

#if 0  /* SVR4 */
	if (i == OFIELDS)
		return 0;
#else
	if (i == OFIELDS) {
		spwd.sp_warn = spwd.sp_inact = spwd.sp_expire =
			spwd.sp_flag = -1;

		return &spwd;
	}
#endif

	/*
	 * The rest of the fields are mandatory for SVR4, but optional
	 * for anything else.  However, if one is present the others
	 * must be as well.
	 */

	/*
	 * Get the number of days of password expiry warning.
	 */

	if ((spwd.sp_warn = strtol (fields[5], &cpp, 10)) == 0 && *cpp) {
		return 0;
	} else if (fields[5][0] == '\0')
		spwd.sp_warn = -1;

	/*
	 * Get the number of days of inactivity before an account is
	 * disabled.
	 */

	if ((spwd.sp_inact = strtol (fields[6], &cpp, 10)) == 0 && *cpp) {
		return 0;
	} else if (fields[6][0] == '\0')
		spwd.sp_inact = -1;

	/*
	 * Get the number of days after the epoch before the account is
	 * set to expire.
	 */

	if ((spwd.sp_expire = strtol (fields[7], &cpp, 10)) == 0 && *cpp) {
		return 0;
	} else if (fields[7][0] == '\0')
		spwd.sp_expire = -1;

	/*
	 * This field is reserved for future use.  But it isn't supposed
	 * to have anything other than a valid integer in it.
	 */

	if ((spwd.sp_flag = strtol (fields[8], &cpp, 10)) == 0 && *cpp) {
		return 0;
	} else if (fields[8][0] == '\0')
		spwd.sp_flag = -1;

	return (&spwd);
}
#endif	/*}*/