child_listener(const struct vev *e, int what) { if ((what & ~EV_RD) || VLU_Fd(child_output, child_std_vlu)) { ev_listen = NULL; if (e != NULL) mgt_reap_child(); return (1); } return (0); }
int VSUB_run(struct vsb *sb, vsub_func_f *func, void *priv, const char *name, int maxlines) { int rv, p[2], sfd, status; pid_t pid; struct vlu *vlu; struct vsub_priv sp; sp.sb = sb; sp.name = name; sp.lines = 0; sp.maxlines = maxlines; if (pipe(p) < 0) { VSB_printf(sb, "Starting %s: pipe() failed: %s", name, strerror(errno)); return (-1); } assert(p[0] > STDERR_FILENO); assert(p[1] > STDERR_FILENO); if ((pid = fork()) < 0) { VSB_printf(sb, "Starting %s: fork() failed: %s", name, strerror(errno)); AZ(close(p[0])); AZ(close(p[1])); return (-1); } if (pid == 0) { AZ(close(STDIN_FILENO)); assert(open("/dev/null", O_RDONLY) == STDIN_FILENO); assert(dup2(p[1], STDOUT_FILENO) == STDOUT_FILENO); assert(dup2(p[1], STDERR_FILENO) == STDERR_FILENO); /* Close all other fds */ for (sfd = STDERR_FILENO + 1; sfd < 100; sfd++) (void)close(sfd); func(priv); _exit(1); } AZ(close(p[1])); vlu = VLU_New(&sp, vsub_vlu, 0); while (!VLU_Fd(p[0], vlu)) continue; AZ(close(p[0])); VLU_Destroy(vlu); if (sp.maxlines >= 0 && sp.lines > sp.maxlines) VSB_printf(sb, "[%d lines truncated]\n", sp.lines - sp.maxlines); do { rv = waitpid(pid, &status, 0); if (rv < 0 && errno != EINTR) { VSB_printf(sb, "Running %s: waitpid() failed: %s\n", name, strerror(errno)); return (-1); } } while (rv < 0); if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { VSB_printf(sb, "Running %s failed", name); if (WIFEXITED(status)) VSB_printf(sb, ", exit %d", WEXITSTATUS(status)); if (WIFSIGNALED(status)) VSB_printf(sb, ", signal %d", WTERMSIG(status)); if (WCOREDUMP(status)) VSB_printf(sb, ", core dumped"); VSB_printf(sb, "\n"); return (-1); } return (0); }