usr/src/lib/passwdutil/utils.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #include <sys/types.h>
  27 #include <sys/time.h>
  28 #include <string.h>
  29 #include <thread.h>
  30 #include <unistd.h>
  31 #include <stdlib.h>
  32 #include <crypt.h>
  33 #include <pwd.h>
  34 #include <shadow.h>
  35
  36 #include <deflt.h>
  37
  38 #include "passwdutil.h"
  39
  40 #define PWADMIN "/etc/default/passwd"
  41
  42 #define MINWEEKS        -1
  43 #define MAXWEEKS        -1
  44 #define WARNWEEKS       -1
  45
  46 extern repops_t files_repops, nis_repops, ldap_repops, nss_repops;
  47
  48 repops_t *rops[REP_LAST+1] = {
  49         NULL,
  50         &files_repops,
  51         &nis_repops,
  52         NULL,
  53         &ldap_repops,
  54         NULL,
  55         NULL,
  56         NULL,
  57         &nss_repops,
  58 };
  59
  60 void
  61 free_pwd(struct passwd *pw)
  62 {
  63         if (pw->pw_name) free(pw->pw_name);
  64         if (pw->pw_passwd) free(pw->pw_passwd);
  65         if (pw->pw_gecos) free(pw->pw_gecos);
  66         if (pw->pw_dir) free(pw->pw_dir);
  67         if (pw->pw_shell) free(pw->pw_shell);
  68         free(pw);
  69 }
  70
  71 void
  72 free_spwd(struct spwd *spw)
  73 {
  74         if (spw->sp_namp) free(spw->sp_namp);
  75         if (spw->sp_pwdp) free(spw->sp_pwdp);
  76         free(spw);
  77 }
  78
  79 int
  80 dup_pw(struct passwd **d, struct passwd *s)
  81 {
  82         if (s == NULL) {
  83                 *d = NULL;
  84                 return (PWU_NOT_FOUND);
  85         }
  86         if ((*d = calloc(1, sizeof (**d))) == NULL)
  87                 return (PWU_NOMEM);
  88
  89         if (s->pw_name) {
  90                 if (((*d)->pw_name = strdup(s->pw_name)) == NULL)
  91                         goto no_mem;
  92         }
  93         if (s->pw_passwd) {
  94                 if (((*d)->pw_passwd = strdup(s->pw_passwd)) == NULL)
  95                         goto no_mem;
  96         }
  97         (*d)->pw_uid = s->pw_uid;
  98         (*d)->pw_gid = s->pw_gid;
  99
 100         if (s->pw_gecos) {
 101                 if (((*d)->pw_gecos = strdup(s->pw_gecos)) == NULL)
 102                         goto no_mem;
 103         }
 104         if (s->pw_dir) {
 105                 if (((*d)->pw_dir = strdup(s->pw_dir)) == NULL)
 106                         goto no_mem;
 107         }
 108         if (s->pw_shell) {
 109                 if (((*d)->pw_shell = strdup(s->pw_shell)) == NULL)
 110                         goto no_mem;
 111         }
 112
 113         return (PWU_SUCCESS);
 114
 115 no_mem:
 116         free_pwd(*d);
 117         *d = NULL;
 118         return (PWU_NOMEM);
 119 }
 120
 121 int
 122 dup_spw(struct spwd **d, struct spwd *s)
 123 {
 124         if (s == NULL) {
 125                 *d = NULL;
 126                 return (PWU_NOT_FOUND);
 127         }
 128         if ((*d = calloc(1, sizeof (**d))) == NULL)
 129                 return (PWU_NOMEM);
 130
 131         **d = *s;
 132
 133         if (s->sp_namp)
 134                 if (((*d)->sp_namp = strdup(s->sp_namp)) == NULL)
 135                         goto no_mem;
 136         if (s->sp_pwdp)
 137                 if (((*d)->sp_pwdp = strdup(s->sp_pwdp)) == NULL)
 138                         goto no_mem;
 139         return (PWU_SUCCESS);
 140
 141 no_mem:
 142         free_spwd(*d);
 143         return (PWU_NOMEM);
 144 }
 145
 146 /*
 147  * read a value from the defaults file, and return it if it is
 148  * a positive integer. If the value is not defined, or negative,
 149  * return the supplied default value
 150  */
 151 int
 152 def_getuint(char *name, int defvalue, void *defp)
 153 {
 154         char *p;
 155         int val = -1;   /* -1 is a guard to catch undefined values */
 156
 157         if ((p = defread_r(name, defp)) != NULL)
 158                 val = atoi(p);
 159
 160         return (val >= 0 ? val : defvalue);
 161 }
 162
 163 void
 164 turn_on_default_aging(struct spwd *spw)
 165 {
 166         int minweeks;
 167         int maxweeks;
 168         int warnweeks;
 169         void    *defp;
 170
 171         if ((defp = defopen_r(PWADMIN)) == NULL) {
 172                 minweeks = MINWEEKS;
 173                 maxweeks = MAXWEEKS;
 174                 warnweeks = WARNWEEKS;
 175         } else {
 176                 minweeks = def_getuint("MINWEEKS=", MINWEEKS, defp);
 177                 maxweeks = def_getuint("MAXWEEKS=", MAXWEEKS, defp);
 178                 warnweeks = def_getuint("WARNWEEKS=", WARNWEEKS, defp);
 179                 defclose_r(defp);
 180         }
 181
 182         /*
 183          * The values specified in /etc/default/passwd are interpreted
 184          * in a specific way. Special cases are
 185          *   MINWEEKS==0 (results in sp_min = -1)
 186          *   MAXWEEKS==0 (results in sp_max = default)
 187          */
 188         spw->sp_min = 7 * minweeks;
 189         if (spw->sp_min <= 0)
 190                 spw->sp_min = -1;
 191
 192         spw->sp_max = 7 * maxweeks;
 193         if (spw->sp_max == 0)
 194                 spw->sp_max = 7 * MAXWEEKS;
 195         if (spw->sp_max < 0)
 196                 spw->sp_max = -1;
 197
 198         spw->sp_warn = 7 * warnweeks;
 199         if (spw->sp_warn <= 0)
 200                 spw->sp_warn = -1;
 201 }
 202
 203 /*
 204  * open and read a value from the defaults file,
 205  * return value found or default value if not found.
 206  */
 207 int
 208 def_getint(char *name, int defvalue)
 209 {
 210         int     val;
 211         void    *defp;
 212
 213         if ((defp = defopen_r(PWADMIN)) == NULL) {
 214                 val = defvalue;
 215         } else {
 216                 val = def_getuint(name, defvalue, defp);
 217                 defclose_r(defp);
 218         }
 219
 220         return (val);
 221 }