usr.sbin/rpc.yppasswdd/pw_copy.c

   1 /*-
   2  * Copyright (c) 1990, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)pw_copy.c        8.4 (Berkeley) 4/2/94
  34  * $FreeBSD: src/usr.sbin/rpc.yppasswdd/pw_copy.c,v 1.4.2.1 2000/07/12 11:09:40 davidn Exp $
  35  * $DragonFly: src/usr.sbin/rpc.yppasswdd/pw_copy.c,v 1.4 2005/11/25 00:32:49 swildner Exp $
  36  */
  37
  38 /*
  39  * This module is used to copy the master password file, replacing a single
  40  * record, by chpass(1) and passwd(1).
  41  */
  42
  43 #include <err.h>
  44 #include <pwd.h>
  45 #include <stdio.h>
  46 #include <string.h>
  47
  48 #include <pw_util.h>
  49 #include "yppasswdd_extern.h"
  50
  51 int
  52 pw_copy(int ffd, int tfd, struct passwd *pw)
  53 {
  54         FILE *from, *to;
  55         int done;
  56         char *p, buf[8192];
  57         char uidstr[20];
  58         char gidstr[20];
  59         char chgstr[20];
  60         char expstr[20];
  61
  62         snprintf(uidstr, sizeof(uidstr), "%d", pw->pw_uid);
  63         snprintf(gidstr, sizeof(gidstr), "%d", pw->pw_gid);
  64         snprintf(chgstr, sizeof(chgstr), "%ld", pw->pw_change);
  65         snprintf(expstr, sizeof(expstr), "%ld", pw->pw_expire);
  66
  67         if (!(from = fdopen(ffd, "r"))) {
  68                 pw_error(passfile, 1, 1);
  69                 return(-1);
  70         }
  71         if (!(to = fdopen(tfd, "w"))) {
  72                 pw_error(tempname, 1, 1);
  73                 return(-1);
  74         }
  75         for (done = 0; fgets(buf, sizeof(buf), from);) {
  76                 if (!strchr(buf, '\n')) {
  77                         yp_error("%s: line too long", passfile);
  78                         pw_error(NULL, 0, 1);
  79                         goto err;
  80                 }
  81                 if (done) {
  82                         fprintf(to, "%s", buf);
  83                         if (ferror(to))
  84                                 goto err;
  85                         continue;
  86                 }
  87                 /*
  88                  * Just copy comments and blank lines
  89                  */
  90                 p = buf + strspn(buf, " \t\n");
  91                 if (*p == '\0' || *p == '#') {
  92                         fprintf(to, "%s", buf);
  93                         if (ferror(to))
  94                                 goto err;
  95                         continue;
  96                 }
  97                 if (!(p = strchr(buf, ':'))) {
  98                         yp_error("%s: corrupted entry", passfile);
  99                         pw_error(NULL, 0, 1);
 100                         goto err;
 101                 }
 102                 *p = '\0';
 103                 if (strcmp(buf, pw->pw_name)) {
 104                         *p = ':';
 105                         fprintf(to, "%s", buf);
 106                         if (ferror(to))
 107                                 goto err;
 108                         continue;
 109                 }
 110                 fprintf(to, "%s:%s:%s:%s:%s:%s:%s:%s:%s:%s\n",
 111                     pw->pw_name, pw->pw_passwd,
 112                     pw->pw_fields & _PWF_UID ? uidstr : "",
 113                     pw->pw_fields & _PWF_GID ? gidstr : "",
 114                     pw->pw_class,
 115                     pw->pw_fields & _PWF_CHANGE ? chgstr : "",
 116                     pw->pw_fields & _PWF_EXPIRE ? expstr : "",
 117                     pw->pw_gecos, pw->pw_dir, pw->pw_shell);
 118                 done = 1;
 119                 if (ferror(to))
 120                         goto err;
 121         }
 122         if (!done) {
 123                 if (allow_additions) {
 124                         fprintf(to, "%s:%s:%s:%s:%s:%s:%s:%s:%s:%s\n",
 125                             pw->pw_name, pw->pw_passwd,
 126                             pw->pw_fields & _PWF_UID ? uidstr : "",
 127                             pw->pw_fields & _PWF_GID ? gidstr : "",
 128                             pw->pw_class,
 129                             pw->pw_fields & _PWF_CHANGE ? chgstr : "",
 130                             pw->pw_fields & _PWF_EXPIRE ? expstr : "",
 131                             pw->pw_gecos, pw->pw_dir, pw->pw_shell);
 132                 } else {
 133                         yp_error("user \"%s\" not found in %s -- \
 134 NIS maps and password file possibly out of sync", pw->pw_name, passfile);
 135                         goto err;
 136                 }
 137         }
 138         if (ferror(to)) {
 139 err:            pw_error(NULL, 1, 1);
 140                 fclose(to);
 141                 fclose(from);
 142                 return(-1);
 143         }
 144         fclose(to);
 145         fclose(from);
 146         return(0);
 147 }