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1 /* compatibility hack for old systems lacking daemon() */ |
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2 |
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3 #include "dcc_config.h" |
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4 #include "dcc_paths.h" |
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5 |
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6 #include <stdio.h> |
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7 #include <unistd.h> |
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8 #include <stdlib.h> |
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9 #include <fcntl.h> |
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10 |
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11 int |
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12 dcc_daemon(int nochdir, int noclose) |
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13 { |
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14 int retv; |
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15 |
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16 if (!nochdir) { |
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17 if (chdir("/") == -1) |
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18 perror("chdir /"); |
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19 } |
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20 retv = fork(); |
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21 if (retv == -1) |
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22 return -1; /* fork() failed */ |
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23 |
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24 if (retv != 0) |
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25 _exit(0); /* parent of new child */ |
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26 |
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27 /* fork again after setsid() so that the PID is not the session |
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28 * group leader so that opening a tty device won't make a |
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29 * controlling terminal. */ |
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30 setsid(); |
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31 retv = fork(); |
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32 if (retv == -1) { |
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33 perror("fork"); /* second fork() failed */ |
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34 exit(1); /* cannot tell caller */ |
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35 } |
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36 if (retv != 0) |
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37 _exit(0); /* parent of final child */ |
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38 |
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39 if (!noclose) { |
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40 close(0); |
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41 close(1); |
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42 close(2); |
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43 open(_PATH_DEVNULL, O_RDWR, 0666); |
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44 dup2(0, 1); |
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45 dup2(0, 2); |
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46 } |
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47 return 0; |
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48 } |
