BSD 4_3_Net_2 release

[unix-history] / usr / src / usr.sbin / pwd_mkdb / pw_scan.c

/*-
* Copyright (c) 1990 The Regents of the University of California.
* 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. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University 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 THE REGENTS 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 THE REGENTS 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.
*/

#ifndef lint
static char sccsid[] = "@(#)pw_scan.c   5.1 (Berkeley) 2/12/91";
#endif /* not lint */

/*
* This module is used to "verify" password entries by chpass(1) and
* pwd_mkdb(8).
*/

#include <sys/param.h>
#include <fcntl.h>
#include <pwd.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

extern char *progname;

pw_scan(bp, pw)
       char *bp;
       struct passwd *pw;
{
       register long id;
       register int root;
       register char *p, *sh;
       char *getusershell();

       if (!(pw->pw_name = strsep(&bp, ":")))          /* login */
               goto fmt;
       root = !strcmp(pw->pw_name, "root");

       if (!(pw->pw_passwd = strsep(&bp, ":")))        /* passwd */
               goto fmt;

       if (!(p = strsep(&bp, ":")))                    /* uid */
               goto fmt;
       id = atol(p);
       if (root && id) {
               (void)fprintf(stderr, "%s: root uid should be 0", progname);
               return(0);
       }
       if (id > USHRT_MAX) {
               (void)fprintf(stderr,
                   "%s: %s > max uid value (%d)", progname, p, USHRT_MAX);
               return(0);
       }
       pw->pw_uid = id;

       if (!(p = strsep(&bp, ":")))                    /* gid */
               goto fmt;
       id = atol(p);
       if (id > USHRT_MAX) {
               (void)fprintf(stderr,
                   "%s: %s > max gid value (%d)", progname, p, USHRT_MAX);
               return(0);
       }
       pw->pw_gid = id;

       pw->pw_class = strsep(&bp, ":");                /* class */
       if (!(p = strsep(&bp, ":")))                    /* change */
               goto fmt;
       pw->pw_change = atol(p);
       if (!(p = strsep(&bp, ":")))                    /* expire */
               goto fmt;
       pw->pw_expire = atol(p);
       pw->pw_gecos = strsep(&bp, ":");                /* gecos */
       pw->pw_dir = strsep(&bp, ":");                  /* directory */
       if (!(pw->pw_shell = strsep(&bp, ":")))         /* shell */
               goto fmt;

       p = pw->pw_shell;
       if (root && *p)                                 /* empty == /bin/sh */
               for (setusershell();;) {
                       if (!(sh = getusershell())) {
                               (void)fprintf(stderr,
                                   "%s: warning, unknown root shell\n",
                                   progname);
                               break;
                       }
                       if (!strcmp(p, sh))
                               break;  
               }

       if (p = strsep(&bp, ":")) {                     /* too many */
fmt:            (void)fprintf(stderr, "%s: corrupted entry\n", progname);
               return(0);
       }
       return(1);
}