--- /dev/null
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * COPYING NOTES
+ *
+ * timeout.c -- a timeout handler for shell commands
+ *
+ * Copyright (C) 2005-6, Roberto A. Foglietta <me@roberto.foglietta.name>
+ *
+ * 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; version 2 of the License.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ */
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * REVISION NOTES:
+ * released 17-11-2005 by Roberto A. Foglietta
+ * talarm 04-12-2005 by Roberto A. Foglietta
+ * modified 05-12-2005 by Roberto A. Foglietta
+ * sizerdct 06-12-2005 by Roberto A. Foglietta
+ * splitszf 12-05-2006 by Roberto A. Foglietta
+ * rewrite 14-11-2008 vda
+ */
+
+#include "libbb.h"
+
+int timeout_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int timeout_main(int argc UNUSED_PARAM, char **argv)
+{
+ int signo;
+ int status;
+ int parent = 0;
+ int timeout = 10;
+ pid_t pid;
+#if !BB_MMU
+ char *sv1, *sv2;
+#endif
+ const char *opt_s = "TERM";
+
+ /* -p option is not documented, it is needed to support NOMMU. */
+
+ /* -t SECONDS; -p PARENT_PID */
+ opt_complementary = "t+" USE_FOR_NOMMU(":p+");
+ getopt32(argv, "s:t" USE_FOR_NOMMU(":p:"), &opt_s, &timeout, &parent);
+ /*argv += optind; - no, wait for bb_daemonize_or_rexec! */
+ signo = get_signum(opt_s);
+ if (signo < 0)
+ bb_error_msg_and_die("unknown signal '%s'", opt_s);
+
+ /* We want to create a grandchild which will watch
+ * and kill the grandparent. Other methods:
+ * making parent watch child disrupts parent<->child link
+ * (example: "tcpsvd 0.0.0.0 1234 timeout service_prog" -
+ * it's better if service_prog is a child of tcpsvd!),
+ * making child watch parent results in programs having
+ * unexpected children. */
+
+ if (parent) /* we were re-execed, already grandchild */
+ goto grandchild;
+ if (!argv[optind]) /* no PROG? */
+ bb_show_usage();
+
+ pid = vfork();
+ if (pid < 0)
+ bb_perror_msg_and_die("vfork");
+#if !BB_MMU
+ sv1 = argv[optind];
+ sv2 = argv[optind + 1];
+#endif
+ if (pid == 0) {
+ /* Child: spawn grandchild and exit */
+ parent = getppid();
+#if !BB_MMU
+ argv[optind] = xasprintf("-p%u", parent);
+ argv[optind + 1] = NULL;
+#endif
+ /* NB: exits with nonzero on error: */
+ bb_daemonize_or_rexec(0, argv);
+ /* Here we are grandchild. Sleep, then kill grandparent */
+ grandchild:
+ /* Just sleep(NUGE_NUM); kill(parent) may kill wrong process! */
+ while (1) {
+ sleep(1);
+ if (--timeout <= 0)
+ break;
+ if (kill(parent, 0)) {
+ /* process is gone */
+ return EXIT_SUCCESS;
+ }
+ }
+ kill(parent, signo);
+ return EXIT_SUCCESS;
+ }
+
+ /* Parent */
+ wait(&status); /* wait for child to die */
+ /* Did intermediate [v]fork or exec fail? */
+ if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
+ return EXIT_FAILURE;
+ /* Ok, exec a program as requested */
+ argv += optind;
+#if !BB_MMU
+ argv[0] = sv1;
+ argv[1] = sv2;
+#endif
+ BB_EXECVP(argv[0], argv);
+ bb_perror_msg_and_die("exec '%s'", argv[0]);
+}
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * COPYING NOTES
+ *
+ * timeout.c -- a timeout handler for shell commands
+ *
+ * Copyright (C) 2005-6, Roberto A. Foglietta <me@roberto.foglietta.name>
+ *
+ * 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; version 2 of the License.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ */
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * REVISION NOTES:
+ * released 17-11-2005 by Roberto A. Foglietta
+ * talarm 04-12-2005 by Roberto A. Foglietta
+ * modified 05-12-2005 by Roberto A. Foglietta
+ * sizerdct 06-12-2005 by Roberto A. Foglietta
+ * splitszf 12-05-2006 by Roberto A. Foglietta
+ * rewrite 14-11-2008 vda
+ */
+
+#include "libbb.h"
+
+int timeout_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int timeout_main(int argc UNUSED_PARAM, char **argv)
+{
+ int signo;
+ int status;
+ int parent = 0;
+ int timeout = 10;
+ pid_t pid;
+#if !BB_MMU
+ char *sv1, *sv2;
+#endif
+ const char *opt_s = "TERM";
+
+ /* -p option is not documented, it is needed to support NOMMU. */
+
+ /* -t SECONDS; -p PARENT_PID */
+ opt_complementary = "t+" USE_FOR_NOMMU(":p+");
+ getopt32(argv, "s:t" USE_FOR_NOMMU(":p:"), &opt_s, &timeout, &parent);
+ /*argv += optind; - no, wait for bb_daemonize_or_rexec! */
+ signo = get_signum(opt_s);
+ if (signo < 0)
+ bb_error_msg_and_die("unknown signal '%s'", opt_s);
+
+ /* We want to create a grandchild which will watch
+ * and kill the grandparent. Other methods:
+ * making parent watch child disrupts parent<->child link
+ * (example: "tcpsvd 0.0.0.0 1234 timeout service_prog" -
+ * it's better if service_prog is a child of tcpsvd!),
+ * making child watch parent results in programs having
+ * unexpected children. */
+
+ if (parent) /* we were re-execed, already grandchild */
+ goto grandchild;
+ if (!argv[optind]) /* no PROG? */
+ bb_show_usage();
+
+ pid = vfork();
+ if (pid < 0)
+ bb_perror_msg_and_die("vfork");
+#if !BB_MMU
+ sv1 = argv[optind];
+ sv2 = argv[optind + 1];
+#endif
+ if (pid == 0) {
+ /* Child: spawn grandchild and exit */
+ parent = getppid();
+#if !BB_MMU
+ argv[optind] = xasprintf("-p%u", parent);
+ argv[optind + 1] = NULL;
+#endif
+ /* NB: exits with nonzero on error: */
+ bb_daemonize_or_rexec(0, argv);
+ /* Here we are grandchild. Sleep, then kill grandparent */
+ grandchild:
+ /* Just sleep(NUGE_NUM); kill(parent) may kill wrong process! */
+ while (1) {
+ sleep(1);
+ if (--timeout <= 0)
+ break;
+ if (kill(parent, 0)) {
+ /* process is gone */
+ return EXIT_SUCCESS;
+ }
+ }
+ kill(parent, signo);
+ return EXIT_SUCCESS;
+ }
+
+ /* Parent */
+ wait(&status); /* wait for child to die */
+ /* Did intermediate [v]fork or exec fail? */
+ if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
+ return EXIT_FAILURE;
+ /* Ok, exec a program as requested */
+ argv += optind;
+#if !BB_MMU
+ argv[0] = sv1;
+ argv[1] = sv2;
+#endif
+ BB_EXECVP(argv[0], argv);
+ bb_perror_msg_and_die("exec '%s'", argv[0]);
+}
projects / platform / upstream / busybox.git / commitdiff