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/* $OpenBSD: btd.c,v 1.1 2008/11/24 23:34:42 uwe Exp $ */
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <dev/bluetooth/btdev.h>
#include <err.h>
#include <errno.h>
#include <event.h>
#include <fcntl.h>
#include <libgen.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "btd.h"
void sighdlr(int, short, void *);
__dead void usage(void);
int check_child(pid_t, const char *);
static const char *progname;
static int quit = 0;
static int reconfig = 0;
static int sigchld = 0;
static struct event ev_sigchld;
static struct event ev_sighup;
static struct event ev_sigint;
static struct event ev_sigterm;
static struct bufferevent *ev_bt;
static void readcb(struct bufferevent *, void *);
static void writecb(struct bufferevent *, void *);
static void errorcb(struct bufferevent *, short, void *);
void
sighdlr(int sig, short what, void *arg)
{
switch (sig) {
case SIGTERM:
case SIGINT:
quit = 1;
break;
case SIGCHLD:
sigchld = 1;
break;
case SIGHUP:
reconfig = 1;
break;
}
}
__dead void
usage(void)
{
fprintf(stderr, "usage: %s [-d]\n", progname);
exit(2);
}
int
main(int argc, char *argv[])
{
struct btd env;
pid_t chld_pid, pid;
int pipe_chld[2];
struct passwd *pw;
int ch;
progname = basename(argv[0]);
bzero(&env, sizeof(env));
TAILQ_INIT(&env.interfaces);
TAILQ_INIT(&env.devices);
while ((ch = getopt(argc, argv, "d")) != -1) {
switch (ch) {
case 'd':
env.debug = 1;
break;
default:
usage();
/* NOTREACHED */
}
}
argc -= optind;
argv += optind;
if (argc > 0) {
usage();
/* NOTREACHED */
}
if (geteuid() != 0)
errx(1, "need root privileges");
if ((pw = getpwnam(BTD_USER)) == NULL)
errx(1, "unknown user %s", BTD_USER);
endpwent();
log_init(env.debug);
if (!env.debug && daemon(1, 0))
fatal("daemon");
if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_chld) == -1)
fatal("socketpair");
/* fork child process */
sigchld = 1;
chld_pid = bt_main(pipe_chld, &env, pw);
setproctitle("[priv]");
/* only after daemon() */
event_init();
signal_set(&ev_sigchld, SIGCHLD, sighdlr, &env);
signal_set(&ev_sighup, SIGHUP, sighdlr, &env);
signal_set(&ev_sigint, SIGINT, sighdlr, &env);
signal_set(&ev_sigterm, SIGTERM, sighdlr, &env);
signal_add(&ev_sigchld, NULL);
signal_add(&ev_sighup, NULL);
signal_add(&ev_sigint, NULL);
signal_add(&ev_sigterm, NULL);
close(pipe_chld[1]);
if ((ev_bt = bufferevent_new(pipe_chld[0], readcb,
writecb, errorcb, &env)) == NULL)
fatalx("bufferevent_new ev_bt");
bufferevent_enable(ev_bt, EV_READ);
while (quit == 0) {
if (!event_loop(EVLOOP_ONCE))
quit = 1;
if (sigchld) {
if (check_child(chld_pid, "child")) {
quit = 1;
chld_pid = 0;
}
sigchld = 0;
}
}
signal_del(&ev_sigchld);
if (chld_pid)
kill(chld_pid, SIGTERM);
do {
if ((pid = wait(NULL)) == -1 &&
errno != EINTR && errno != ECHILD)
fatal("wait");
} while (pid != -1 || (pid == -1 && errno == EINTR));
log_info("Terminating");
control_cleanup();
return 0;
}
int
check_child(pid_t pid, const char *pname)
{
int status, sig;
char *signame;
if (waitpid(pid, &status, WNOHANG) > 0) {
if (WIFEXITED(status)) {
log_warnx("Lost child: %s exited", pname);
return (1);
}
if (WIFSIGNALED(status)) {
sig = WTERMSIG(status);
signame = strsignal(sig) ? strsignal(sig) : "unknown";
log_warnx("Lost child: %s terminated; signal %d (%s)",
pname, sig, signame);
return (1);
}
}
return (0);
}
static void
readcb(struct bufferevent *ev, void *arg)
{
log_warnx("readcb");
}
static void
writecb(struct bufferevent *ev, void *arg)
{
/* nothing to do here */
log_warnx("writecb");
}
static void
errorcb(struct bufferevent *ev, short what, void *arg)
{
log_warnx("Pipe error");
quit = 1;
}
#ifdef notyet
void
btd_devctl(struct imsg *imsg)
{
struct btdev_attach_args baa;
char buf[sizeof(int) + sizeof(bdaddr_t)];
unsigned long cmd;
int res;
int fd;
if (devinfo_load_attach_args(&baa, imsg->data,
imsg->hdr.len - IMSG_HEADER_SIZE))
fatalx("invalid IMSG_ATTACH/DETACH received");
if ((fd = open(BTHUB_PATH, O_WRONLY, 0)) == -1) {
res = errno;
log_warn("can't open %s", BTHUB_PATH);
goto ret;
}
cmd = imsg->hdr.type == IMSG_ATTACH ? BTDEV_ATTACH : BTDEV_DETACH;
if (ioctl(fd, cmd, &baa) == -1)
res = errno;
res = 0;
(void)close(fd);
ret:
devinfo_unload_attach_args(&baa);
memcpy(buf, &res, sizeof(res));
memcpy((int *)buf + 1, &baa.bd_raddr, sizeof(bdaddr_t));
/* send reply */
}
#endif
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