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00028 #include "asterisk.h"
00029
00030 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 177761 $")
00031
00032 #include "asterisk/pbx.h"
00033 #include "asterisk/module.h"
00034 #include "asterisk/app.h"
00035 #include "asterisk/channel.h"
00036 #include "asterisk/strings.h"
00037 #include "asterisk/threadstorage.h"
00038
00039 AST_THREADSTORAGE(buf_buf);
00040
00041 static char *app = "System";
00042
00043 static char *app2 = "TrySystem";
00044
00045 static char *synopsis = "Execute a system command";
00046
00047 static char *synopsis2 = "Try executing a system command";
00048
00049 static char *chanvar = "SYSTEMSTATUS";
00050
00051 static char *descrip =
00052 " System(command): Executes a command by using system(). If the command\n"
00053 "fails, the console should report a fallthrough. \n"
00054 "Result of execution is returned in the SYSTEMSTATUS channel variable:\n"
00055 " FAILURE Could not execute the specified command\n"
00056 " SUCCESS Specified command successfully executed\n";
00057
00058 static char *descrip2 =
00059 " TrySystem(command): Executes a command by using system().\n"
00060 "on any situation.\n"
00061 "Result of execution is returned in the SYSTEMSTATUS channel variable:\n"
00062 " FAILURE Could not execute the specified command\n"
00063 " SUCCESS Specified command successfully executed\n"
00064 " APPERROR Specified command successfully executed, but returned error code\n";
00065
00066 static int system_exec_helper(struct ast_channel *chan, void *data, int failmode)
00067 {
00068 int res = 0;
00069 struct ast_str *buf = ast_str_thread_get(&buf_buf, 16);
00070
00071 if (ast_strlen_zero(data)) {
00072 ast_log(LOG_WARNING, "System requires an argument(command)\n");
00073 pbx_builtin_setvar_helper(chan, chanvar, "FAILURE");
00074 return failmode;
00075 }
00076
00077 ast_autoservice_start(chan);
00078
00079
00080 ast_str_get_encoded_str(&buf, 0, (char *) data);
00081 res = ast_safe_system(ast_str_buffer(buf));
00082
00083 if ((res < 0) && (errno != ECHILD)) {
00084 ast_log(LOG_WARNING, "Unable to execute '%s'\n", (char *)data);
00085 pbx_builtin_setvar_helper(chan, chanvar, "FAILURE");
00086 res = failmode;
00087 } else if (res == 127) {
00088 ast_log(LOG_WARNING, "Unable to execute '%s'\n", (char *)data);
00089 pbx_builtin_setvar_helper(chan, chanvar, "FAILURE");
00090 res = failmode;
00091 } else {
00092 if (res < 0)
00093 res = 0;
00094 if (res != 0)
00095 pbx_builtin_setvar_helper(chan, chanvar, "APPERROR");
00096 else
00097 pbx_builtin_setvar_helper(chan, chanvar, "SUCCESS");
00098 res = 0;
00099 }
00100
00101 ast_autoservice_stop(chan);
00102
00103 return res;
00104 }
00105
00106 static int system_exec(struct ast_channel *chan, void *data)
00107 {
00108 return system_exec_helper(chan, data, -1);
00109 }
00110
00111 static int trysystem_exec(struct ast_channel *chan, void *data)
00112 {
00113 return system_exec_helper(chan, data, 0);
00114 }
00115
00116 static int unload_module(void)
00117 {
00118 int res;
00119
00120 res = ast_unregister_application(app);
00121 res |= ast_unregister_application(app2);
00122
00123 return res;
00124 }
00125
00126 static int load_module(void)
00127 {
00128 int res;
00129
00130 res = ast_register_application(app2, trysystem_exec, synopsis2, descrip2);
00131 res |= ast_register_application(app, system_exec, synopsis, descrip);
00132
00133 return res;
00134 }
00135
00136 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Generic System() application");