1 | //lib.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008 |
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5 | * |
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6 | * This file is part of roard a part of RoarAudio, |
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7 | * a cross-platform sound system for both, home and professional use. |
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8 | * See README for details. |
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9 | * |
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10 | * This file is free software; you can redistribute it and/or modify |
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11 | * it under the terms of the GNU General Public License version 3 |
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12 | * as published by the Free Software Foundation. |
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13 | * |
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14 | * RoarAudio is distributed in the hope that it will be useful, |
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | * GNU General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with this software; see the file COPYING. If not, write to |
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21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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22 | * |
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23 | */ |
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24 | |
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25 | #include "roard.h" |
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26 | |
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27 | int lib_run_bg(char * cmd, int infh, int outfh, int errfh, int * closefh, int lenclose) { |
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28 | #ifdef ROAR_HAVE_FORK |
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29 | pid_t child = fork(); |
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30 | int fh[3] = {-1, -1, -1}; |
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31 | int i; |
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32 | |
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33 | if ( child == -1 ) { |
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34 | ROAR_ERR("lib_run_bg(*): Can not fork: %s", strerror(errno)); |
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35 | return -1; |
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36 | } |
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37 | |
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38 | if ( child ) { |
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39 | // we are the parent! |
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40 | return child; |
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41 | } |
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42 | |
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43 | // we are the child. |
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44 | // first we need to close a lot of open files! |
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45 | |
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46 | // before we do this we need to keep backups of our handles: |
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47 | fh[0] = dup(infh); |
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48 | fh[1] = dup(outfh); |
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49 | fh[2] = dup(errfh); |
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50 | |
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51 | // TODO: test for errors here. |
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52 | |
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53 | #ifdef ROAR_SUPPORT_LISTEN |
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54 | for (i = 0; i < ROAR_MAX_LISTEN_SOCKETS; i++) |
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55 | if ( g_listen_socket[i] != -1 ) |
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56 | close(g_listen_socket[i]); // listen socket. |
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57 | #endif |
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58 | |
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59 | // this breaks the new driver interface |
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60 | // clients_free(); // delete all clients!, this allso delets all streams |
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61 | |
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62 | #ifndef ROAR_WITHOUT_DCOMP_MIDI |
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63 | midi_free(); // close midi devices |
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64 | #endif |
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65 | |
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66 | // close fh's we got ask to close: |
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67 | #ifdef ROAR_HAVE_IO_POSIX |
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68 | for (i = 0; i < lenclose; i++) |
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69 | close(closefh[i]); |
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70 | #else |
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71 | if ( lenclose ) { |
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72 | ROAR_WARN("lib_run_bg(*): lenclose > 0 and no way known to close fds"); |
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73 | } |
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74 | #endif |
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75 | |
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76 | // next we need to remap our stdio: |
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77 | // stdio: fh 0..2 |
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78 | |
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79 | for (i = 0; i < 3; i++) { |
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80 | #ifdef ROAR_HAVE_IO_POSIX |
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81 | close(i); |
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82 | #endif |
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83 | dup2(fh[i], i); // todo test if this is ok. |
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84 | close(fh[i]); |
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85 | } |
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86 | |
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87 | // OK, now we should have set up all our fh properbly, exec our command: |
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88 | |
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89 | execl("/bin/sh", "sh", "-c", cmd, (char*)NULL); |
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90 | |
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91 | // still alive? BAD! |
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92 | ROAR_ERR("lib_run_bg(*): We are still alive! BAD!"); |
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93 | ROAR_U_EXIT(3); |
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94 | return -1; |
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95 | #else |
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96 | return -1; |
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97 | #endif |
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98 | } |
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99 | |
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100 | //ll |
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