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annotate src/child.c @ 91:3e7136221104

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correct masqmail path in rmail script; remove docs on uninstall on install the correct path to the masqmail executable gets inserted into the rmail script now. now documentation, examples, and the templates are removed on uninstall. Empty directories are the only thing that may remain if one installs masqmail into an unusual path.
author meillo@marmaro.de
date Mon, 21 Jun 2010 09:40:16 +0200
parents 98cda87105a7
children fc1c6425c024
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08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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1 /* child.c, Copyright (C) 2000 by Oliver Kurth,
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2 *
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3 * This program is free software; you can redistribute it and/or modify
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4 * it under the terms of the GNU General Public License as published by
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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5 * the Free Software Foundation; either version 2 of the License, or
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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6 * (at your option) any later version.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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11 * GNU General Public License for more details.
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12 *
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13 * You should have received a copy of the GNU General Public License
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14 * along with this program; if not, write to the Free Software
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15 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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16 */
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17
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18 #include <errno.h>
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19 #include <stdio.h>
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20 #include <stdlib.h>
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21 #include <unistd.h>
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22 #include <signal.h>
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23 #include <sys/types.h>
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24 #include <sys/socket.h>
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25 #include <syslog.h>
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26 #include <string.h>
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27
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28 #include "masqmail.h"
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31 int
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32 child(const char *command)
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33 {
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34 int pipe[2];
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35
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36 if (socketpair(AF_UNIX, SOCK_STREAM, 0, pipe) == 0) {
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37 pid_t pid;
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39 pid = fork();
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40 if (pid == 0) {
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41 int i, max_fd = sysconf(_SC_OPEN_MAX);
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42 /* child */
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43 dup2(pipe[0], 0);
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44 dup2(pipe[0], 1);
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45 dup2(pipe[0], 2);
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47 if (max_fd <= 0)
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48 max_fd = 64;
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49 for (i = 3; i < max_fd; i++)
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50 close(i);
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52 {
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53 char *argv[] = { "/bin/sh", "-c", (char *) command, NULL };
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54 execve(*argv, argv, NULL);
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55 }
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56 logwrite(LOG_ALERT, "execve failed: %s\n", strerror(errno));
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57 _exit(EXIT_FAILURE);
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58 } else if (pid == -1) {
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59 return -1;
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60 } else {
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61 close(pipe[0]);
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62 return pipe[1];
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63 }
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64 }
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65 return -2;
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66 }