+static char *run_with_timeout(const void *ctx,
+ const char *cmd,
+ bool *ok,
+ unsigned *timeout_ms)
+{
+ pid_t pid;
+ int p[2];
+ char *ret;
+ int status, ms;
+ struct timeval start, end;
+
+ *ok = false;
+ if (pipe(p) != 0)
+ return talloc_asprintf(ctx, "Failed to create pipe: %s",
+ strerror(errno));
+
+ pid = fork();
+ if (pid == -1) {
+ close_noerr(p[0]);
+ close_noerr(p[1]);
+ return talloc_asprintf(ctx, "Failed to fork: %s",
+ strerror(errno));
+ return NULL;
+ }
+
+ if (pid == 0) {
+ struct itimerval itim;
+
+ if (dup2(p[1], STDOUT_FILENO) != STDOUT_FILENO
+ || dup2(p[1], STDERR_FILENO) != STDERR_FILENO
+ || close(p[0]) != 0
+ || close(STDIN_FILENO) != 0
+ || open("/dev/null", O_RDONLY) != STDIN_FILENO)
+ exit(128);
+
+ itim.it_interval.tv_sec = itim.it_interval.tv_usec = 0;
+ itim.it_value.tv_sec = *timeout_ms / 1000;
+ itim.it_value.tv_usec = (*timeout_ms % 1000) * 1000;
+ setitimer(ITIMER_REAL, &itim, NULL);
+
+ status = system(cmd);
+ if (WIFEXITED(status))
+ exit(WEXITSTATUS(status));
+ /* Here's a hint... */
+ exit(128 + WTERMSIG(status));
+ }
+
+ close(p[1]);
+ gettimeofday(&start, NULL);
+ ret = grab_fd(ctx, p[0], NULL);
+ /* This shouldn't fail... */
+ if (waitpid(pid, &status, 0) != pid)
+ err(1, "Failed to wait for child");
+
+ gettimeofday(&end, NULL);
+ if (WIFSIGNALED(status)) {
+ *timeout_ms = 0;
+ return ret;
+ }
+ if (end.tv_usec < start.tv_usec) {
+ end.tv_usec += 1000000;
+ end.tv_sec--;
+ }
+ ms = (end.tv_sec - start.tv_sec) * 1000
+ + (end.tv_usec - start.tv_usec) / 1000;
+ if (ms > *timeout_ms)
+ *timeout_ms = 0;
+ else
+ *timeout_ms -= ms;
+
+ *ok = (WEXITSTATUS(status) == 0);
+ return ret;
+}
+
projects / ccan / commitdiff