+/*
+ script.c -- call an external script
+ Copyright (C) 1999-2005 Ivo Timmermans,
+ 2000-2013 Guus Sliepen <guus@tinc-vpn.org>
+
+ This program 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 of the License, or
+ (at your option) any later version.
+
+ This program 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.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "system.h"
+
+#include "conf.h"
+#include "logger.h"
+#include "names.h"
+#include "script.h"
+#include "xalloc.h"
+
+bool execute_script(const char *name, char **envp) {
+#ifdef HAVE_SYSTEM
+ char *scriptname;
+ char *command;
+
+ xasprintf(&scriptname, "%s" SLASH "%s%s", confbase, name, scriptextension);
+
+ /* First check if there is a script */
+
+#ifdef HAVE_MINGW
+ if(!*scriptextension) {
+ const char *pathext = getenv("PATHEXT") ?: ".COM;.EXE;.BAT;.CMD";
+ char fullname[strlen(scriptname) + strlen(pathext)];
+ char *ext = fullname + strlen(scriptname);
+ strcpy(fullname, scriptname);
+
+ const char *p = pathext;
+ bool found = false;
+ while(p && *p) {
+ const char *q = strchr(p, ';');
+ if(q) {
+ memcpy(ext, p, q - p);
+ ext[q - p] = 0;
+ *q++;
+ } else {
+ strcpy(ext, p);
+ }
+ if((found = !access(fullname, F_OK)))
+ break;
+ p = q;
+ }
+ if(!found) {
+ free(scriptname);
+ return true;
+ }
+ } else
+#endif
+
+ if(access(scriptname, F_OK)) {
+ free(scriptname);
+ return true;
+ }
+
+ logger(DEBUG_STATUS, LOG_INFO, "Executing script %s", name);
+
+#ifdef HAVE_PUTENV
+ /* Set environment */
+
+ for(int i = 0; envp[i]; i++)
+ putenv(envp[i]);
+#endif
+
+ if(scriptinterpreter)
+ xasprintf(&command, "%s \"%s\"", scriptinterpreter, scriptname);
+ else
+ xasprintf(&command, "\"%s\"", scriptname);
+
+ int status = system(command);
+
+ free(command);
+ free(scriptname);
+
+ /* Unset environment */
+
+ for(int i = 0; envp[i]; i++) {
+ char *e = strchr(envp[i], '=');
+ if(e) {
+ char p[e - envp[i] + 1];
+ strncpy(p, envp[i], e - envp[i]);
+ p[e - envp[i]] = '\0';
+ putenv(p);
+ }
+ }
+
+ if(status != -1) {
+#ifdef WEXITSTATUS
+ if(WIFEXITED(status)) { /* Child exited by itself */
+ if(WEXITSTATUS(status)) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Script %s exited with non-zero status %d",
+ name, WEXITSTATUS(status));
+ return false;
+ }
+ } else if(WIFSIGNALED(status)) { /* Child was killed by a signal */
+ logger(DEBUG_ALWAYS, LOG_ERR, "Script %s was killed by signal %d (%s)",
+ name, WTERMSIG(status), strsignal(WTERMSIG(status)));
+ return false;
+ } else { /* Something strange happened */
+ logger(DEBUG_ALWAYS, LOG_ERR, "Script %s terminated abnormally", name);
+ return false;
+ }
+#endif
+ } else {
+ logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "system", strerror(errno));
+ return false;
+ }
+#endif
+ return true;
+}