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);
}
