/* $Id$ * $URL$ * * plugin that forks and exec's once a key is pressed. the difference to the exec plugin is: this can also only be done once! * * Copyright (C) 2008, Wolfgang Henerbichler * * This file is part of LCD4Linux. * * LCD4Linux is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * LCD4Linux is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * */ /* * exported functions: * * int plugin_init_button_exec(void) * adds various functions * */ /* define the include files you need */ #include "config.h" #include #include #include #include #include #include /* these should always be included */ #include "debug.h" #include "plugin.h" #ifdef WITH_DMALLOC #include #endif /* sample function 'button_exec' */ /* takes as many arguments as you want, first arguemnt is the command that will be called via exec, all the following are parameters you want to add to your command - you won't know what has happened after forking - no return codes available */ /* Note: all local functions should be declared 'static' */ static void my_button_exec(RESULT * result, int argc, RESULT * argv[]) { int pid; int i; int errsv; char *args[argc + 1]; char *arg; char *prog; signal(SIGCHLD, SIG_IGN); prog = R2S(argv[0]); info(prog); for (i = 1; i < argc; i++) { arg = R2S(argv[i]); args[i] = arg; info(arg); } args[0] = prog; args[i] = (char *) 0; pid = fork(); if (pid == 0) { /* child-process */ /* char *args[] = {"-r", "-t", "-l", (char *) 0 }; */ info("executing program"); execvp(prog, args); errsv = errno; info("executing program failed"); info(strerror(errsv)); exit(0); } else if (pid == -1) { info("weird error has occured. couldn't fork."); } else { SetResult(&result, R_STRING, "0"); } } /* plugin initialization */ /* MUST NOT be declared 'static'! */ int plugin_init_button_exec(void) { /* register all our cool functions */ /* the second parameter is the number of arguments */ /* -1 stands for variable argument list */ AddFunction("button_exec", -1, my_button_exec); return 0; } void plugin_exit_button_exec(void) { /* free any allocated memory */ /* close filedescriptors */ } f='#n6'>6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164