Mercurial > masqmail-0.2

annotate src/permissions.c @ 75:257a9e6d1a8e

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fixed correct processing of mails with data lines longer 4096 chars Mail messages with lines longer than 4096 chars were already read correctly, i.e. the spool files were correct. This commit fixes the reading of spool files with long lines. The old behavior was that the message body was truncated right before the first line longer 4096 chars. The number comes from MAX_DATALINE.
author meillo@marmaro.de
date Wed, 16 Jun 2010 19:06:34 +0200
parents f671821d8222
children ffeff2c33799
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1 /* MasqMail
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2 Copyright (C) 2000 Oliver Kurth
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3
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4 This program is free software; you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 2 of the License, or
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7 (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program; if not, write to the Free Software
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16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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17 */
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18
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19 #include <pwd.h>
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20 #include <grp.h>
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21
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22 #include "masqmail.h"
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23
0
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24 /* is there really no function in libc for this? */
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25 gboolean
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26 is_ingroup(uid_t uid, gid_t gid)
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27 {
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28 struct group *grent = getgrgid(gid);
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29
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30 if (grent) {
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31 struct passwd *pwent = getpwuid(uid);
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32 if (pwent) {
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33 char *entry;
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34 int i = 0;
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35 while ((entry = grent->gr_mem[i++])) {
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36 if (strcmp(pwent->pw_name, entry) == 0)
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37 return TRUE;
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38 }
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39 }
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40 }
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41 return FALSE;
0
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42 }
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43
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44 gboolean
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45 is_privileged_user(uid_t uid)
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46 {
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47 return (uid == 0) || (uid == conf.mail_uid) || (is_ingroup(uid, conf.mail_gid));
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48 }
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49
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50 void
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51 set_euidgid(gint uid, gint gid, uid_t * old_uid, gid_t * old_gid)
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52 {
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53 if (old_uid)
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54 *old_uid = geteuid();
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55 if (old_gid)
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56 *old_gid = getegid();
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57
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58 seteuid(0);
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59
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60 if (setegid(gid) != 0) {
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61 logwrite(LOG_ALERT, "could not change gid to %d: %s\n", gid, strerror(errno));
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62 exit(EXIT_FAILURE);
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63 }
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64 if (seteuid(uid) != 0) {
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65 logwrite(LOG_ALERT, "could not change uid to %d: %s\n", uid, strerror(errno));
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66 exit(EXIT_FAILURE);
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67 }
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68 }
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69
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70 void
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71 set_identity(uid_t old_uid, gchar * task_name)
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72 {
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73 if (!conf.run_as_user) {
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74 if (!is_privileged_user(old_uid)) {
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75 fprintf(stderr, "must be root, %s or in group %s for %s.\n", DEF_MAIL_USER, DEF_MAIL_GROUP, task_name);
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76 exit(EXIT_FAILURE);
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77 }
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78
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79 set_euidgid(conf.mail_uid, conf.mail_gid, NULL, NULL);
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80 }
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81 }