mirror of
https://git.FreeBSD.org/ports.git
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118 lines
3.0 KiB
C
118 lines
3.0 KiB
C
/* pnohang: executes command ($4-) with output in file ($3)
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* kills command if no output with $1 seconds with message in $2
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* usage: pnohang timeout file command args ...
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*/
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <sys/stat.h>
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#include <signal.h>
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#include <unistd.h>
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#include <time.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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int
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main(int argc, char *argv[])
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{
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int timeout, status, i, result, ofd;
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char *command, *outfile, *message, args[MAXPATHLEN + 1];
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char logstr[BUFSIZ + 1];
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pid_t pid, pid1, pid2, child;
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time_t now;
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struct stat st;
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struct sigaction sv;
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if (argc < 3) {
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printf("usage: %s timeout outfile message command [args...]\n",
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argv[0]);
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exit(1);
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}
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timeout = atoi(argv[1]);
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outfile = argv[2];
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message = argv[3];
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command = argv[4];
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bzero(args, MAXPATHLEN + 1);
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for (i = 4; i < argc; i++) {
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strlcat(args, argv[i], MAXPATHLEN - strlen(args));
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strlcat(args, " ", MAXPATHLEN - strlen(args));
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}
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pid = getpid();
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/*printf("timeout is %d\n", timeout);
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printf("outfile is %s\n", outfile);
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printf("message is %s\n", message);
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printf("arguments are %s", args);*/
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if ((ofd = open(outfile, O_CREAT|O_TRUNC|O_WRONLY, 0600)) == -1)
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err(1, "open");
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if (dup2(ofd, STDOUT_FILENO) == -1)
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err(1, "dup2 stdout");
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if (dup2(ofd, STDERR_FILENO) == -1)
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err(1, "dup2 stderr");
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if ((pid1 = fork()) > 0) {
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if ((pid2 = fork()) > 0) {
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sv.sa_handler = SIG_IGN;
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sigemptyset(&sv.sa_mask);
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sv.sa_flags = 0;
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sigaction(SIGTERM, &sv, 0);
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/* parent */
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child = wait(&status);
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/*printf("exited child is %d, status is %d\n", child, status);*/
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if (pid1 = child) {
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/*printf("killing process %d (second child)\n", pid2);*/
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kill(pid2, SIGTERM);
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} else {
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/*printf("killing process %d (first child)\n", pid1);*/
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kill(pid1, SIGTERM);
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}
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/* exit status in upper 8 bits, killed signal (if any) in
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* lower 8 bits
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*/
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exit((status >> 8) | (status & 0xff));
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} else {
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/* second child */
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for (;;) {
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sleep(timeout/10);
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now = time(NULL);
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stat(outfile, &st);
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if ((now - st.st_mtime) > timeout) {
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/*snprintf(logstr, BUFSIZ, "logger -t %s killing %s %s, pid %d since no output in %d seconds", argv[0], args, message, pid, timeout);
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system(logstr);*/
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printf("%s: killing %s (%s, pid %d and %d) since no output in %d seconds since %s", argv[0], args, message, pid1, pid, timeout, ctime(&now));
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printf("ps jgx before the singal\n");
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system("ps jgxww");
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sleep(1); /* give it a chance to output the message */
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kill(pid1, SIGTERM);
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sleep(1);
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kill(pid, SIGTERM);
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sleep(1);
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system("ps jgxww");
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exit(1);
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}
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}
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}
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} else {
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/* first child */
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/*printf("executing %s\n", args);*/
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result = execvp(command, argv + 4);
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if (result < 0) {
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printf("Failed to exec %s: %s\n", args, strerror(errno));
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exit(1);
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}
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}
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return 0;
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}
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