static unsigned custom(struct svdir *s, char c)
{
int pid;
int w;
char a[10];
struct stat st;
char *prog[2];
if (s->islog) return 0;
strcpy(a, "control/?");
a[8] = c; /* replace '?' */
if (stat(a, &st) == 0) {
if (st.st_mode & S_IXUSR) {
pid = vfork();
if (pid == -1) {
warn_cannot("vfork for control/?");
return 0;
}
if (!pid) {
/* child */
if (haslog && dup2(logpipe.wr, 1) == -1)
warn_cannot("setup stdout for control/?");
prog[0] = a;
prog[1] = NULL;
execv(a, prog);
fatal_cannot("run control/?");
}
/* parent */
while (safe_waitpid(pid, &w, 0) == -1) {
warn_cannot("wait for child control/?");
return 0;
}
return !wait_exitcode(w);
}
} else {
if (errno != ENOENT)
warn_cannot("stat control/?");
}
return 0;
}
static unsigned custom(struct svdir *s, char c)
{
pid_t pid;
int w;
char a[10];
struct stat st;
if (s->islog)
return 0;
strcpy(a, "control/?");
a[8] = c; /* replace '?' */
if (stat(a, &st) == 0) {
if (st.st_mode & S_IXUSR) {
pid = vfork();
if (pid == -1) {
warn_cannot("vfork for control/?");
return 0;
}
if (pid == 0) {
/* child */
if (haslog && dup2(logpipe.wr, 1) == -1)
warn_cannot("setup stdout for control/?");
execl(a, a, (char *) NULL);
fatal_cannot("run control/?");
}
/* parent */
if (safe_waitpid(pid, &w, 0) == -1) {
warn_cannot("wait for child control/?");
return 0;
}
return WEXITSTATUS(w) == 0;
}
} else {
if (errno != ENOENT)
warn_cannot("stat control/?");
}
return 0;
}
int runsv_main(int argc UNUSED_PARAM, char **argv)
{
struct stat s;
int fd;
int r;
char buf[256];
INIT_G();
dir = single_argv(argv);
xpiped_pair(selfpipe);
close_on_exec_on(selfpipe.rd);
close_on_exec_on(selfpipe.wr);
ndelay_on(selfpipe.rd);
ndelay_on(selfpipe.wr);
sig_block(SIGCHLD);
bb_signals_recursive_norestart(1 << SIGCHLD, s_child);
sig_block(SIGTERM);
bb_signals_recursive_norestart(1 << SIGTERM, s_term);
xchdir(dir);
/* bss: svd[0].pid = 0; */
if (S_DOWN) svd[0].state = S_DOWN; /* otherwise already 0 (bss) */
if (C_NOOP) svd[0].ctrl = C_NOOP;
if (W_UP) svd[0].sd_want = W_UP;
/* bss: svd[0].islog = 0; */
/* bss: svd[1].pid = 0; */
gettimeofday_ns(&svd[0].start);
if (stat("down", &s) != -1)
svd[0].sd_want = W_DOWN;
if (stat("log", &s) == -1) {
if (errno != ENOENT)
warn_cannot("stat ./log");
} else {
if (!S_ISDIR(s.st_mode)) {
errno = 0;
warn_cannot("stat log/down: log is not a directory");
} else {
haslog = 1;
svd[1].state = S_DOWN;
svd[1].ctrl = C_NOOP;
svd[1].sd_want = W_UP;
svd[1].islog = 1;
gettimeofday_ns(&svd[1].start);
if (stat("log/down", &s) != -1)
svd[1].sd_want = W_DOWN;
xpiped_pair(logpipe);
close_on_exec_on(logpipe.rd);
close_on_exec_on(logpipe.wr);
}
}
if (mkdir("supervise", 0700) == -1) {
r = readlink("supervise", buf, sizeof(buf));
if (r != -1) {
if (r == sizeof(buf))
fatal2x_cannot("readlink ./supervise", ": name too long");
buf[r] = 0;
mkdir(buf, 0700);
} else {
if ((errno != ENOENT) && (errno != EINVAL))
fatal_cannot("readlink ./supervise");
}
}
svd[0].fdlock = xopen3("log/supervise/lock"+4,
O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600);
if (flock(svd[0].fdlock, LOCK_EX | LOCK_NB) == -1)
fatal_cannot("lock supervise/lock");
close_on_exec_on(svd[0].fdlock);
if (haslog) {
if (mkdir("log/supervise", 0700) == -1) {
r = readlink("log/supervise", buf, 256);
if (r != -1) {
if (r == 256)
fatal2x_cannot("readlink ./log/supervise", ": name too long");
buf[r] = 0;
fd = xopen(".", O_RDONLY|O_NDELAY);
xchdir("./log");
mkdir(buf, 0700);
if (fchdir(fd) == -1)
fatal_cannot("change back to service directory");
close(fd);
}
else {
if ((errno != ENOENT) && (errno != EINVAL))
fatal_cannot("readlink ./log/supervise");
}
}
svd[1].fdlock = xopen3("log/supervise/lock",
O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600);
if (flock(svd[1].fdlock, LOCK_EX) == -1)
fatal_cannot("lock log/supervise/lock");
close_on_exec_on(svd[1].fdlock);
}
mkfifo("log/supervise/control"+4, 0600);
svd[0].fdcontrol = xopen("log/supervise/control"+4, O_RDONLY|O_NDELAY);
close_on_exec_on(svd[0].fdcontrol);
svd[0].fdcontrolwrite = xopen("log/supervise/control"+4, O_WRONLY|O_NDELAY);
close_on_exec_on(svd[0].fdcontrolwrite);
update_status(&svd[0]);
if (haslog) {
mkfifo("log/supervise/control", 0600);
svd[1].fdcontrol = xopen("log/supervise/control", O_RDONLY|O_NDELAY);
close_on_exec_on(svd[1].fdcontrol);
svd[1].fdcontrolwrite = xopen("log/supervise/control", O_WRONLY|O_NDELAY);
close_on_exec_on(svd[1].fdcontrolwrite);
update_status(&svd[1]);
}
mkfifo("log/supervise/ok"+4, 0600);
fd = xopen("log/supervise/ok"+4, O_RDONLY|O_NDELAY);
close_on_exec_on(fd);
if (haslog) {
mkfifo("log/supervise/ok", 0600);
fd = xopen("log/supervise/ok", O_RDONLY|O_NDELAY);
close_on_exec_on(fd);
}
for (;;) {
struct pollfd x[3];
unsigned deadline;
char ch;
if (haslog)
if (!svd[1].pid && svd[1].sd_want == W_UP)
startservice(&svd[1]);
if (!svd[0].pid)
if (svd[0].sd_want == W_UP || svd[0].state == S_FINISH)
startservice(&svd[0]);
x[0].fd = selfpipe.rd;
x[0].events = POLLIN;
x[1].fd = svd[0].fdcontrol;
x[1].events = POLLIN;
/* x[2] is used only if haslog == 1 */
x[2].fd = svd[1].fdcontrol;
x[2].events = POLLIN;
sig_unblock(SIGTERM);
sig_unblock(SIGCHLD);
poll(x, 2 + haslog, 3600*1000);
sig_block(SIGTERM);
sig_block(SIGCHLD);
while (read(selfpipe.rd, &ch, 1) == 1)
continue;
for (;;) {
pid_t child;
int wstat;
child = wait_any_nohang(&wstat);
if (!child)
break;
if ((child == -1) && (errno != EINTR))
break;
if (child == svd[0].pid) {
svd[0].wstat = wstat;
svd[0].pid = 0;
pidchanged = 1;
svd[0].ctrl &= ~C_TERM;
if (svd[0].state != S_FINISH) {
fd = open("finish", O_RDONLY|O_NDELAY);
if (fd != -1) {
close(fd);
svd[0].state = S_FINISH;
update_status(&svd[0]);
continue;
}
}
svd[0].state = S_DOWN;
deadline = svd[0].start.tv_sec + 1;
gettimeofday_ns(&svd[0].start);
update_status(&svd[0]);
if (LESS(svd[0].start.tv_sec, deadline))
sleep(1);
}
if (haslog) {
if (child == svd[1].pid) {
svd[0].wstat = wstat;
svd[1].pid = 0;
pidchanged = 1;
svd[1].state = S_DOWN;
svd[1].ctrl &= ~C_TERM;
deadline = svd[1].start.tv_sec + 1;
gettimeofday_ns(&svd[1].start);
update_status(&svd[1]);
if (LESS(svd[1].start.tv_sec, deadline))
sleep(1);
}
}
} /* for (;;) */
if (read(svd[0].fdcontrol, &ch, 1) == 1)
ctrl(&svd[0], ch);
if (haslog)
if (read(svd[1].fdcontrol, &ch, 1) == 1)
ctrl(&svd[1], ch);
if (sigterm) {
ctrl(&svd[0], 'x');
sigterm = 0;
}
if (svd[0].sd_want == W_EXIT && svd[0].state == S_DOWN) {
if (svd[1].pid == 0)
_exit(EXIT_SUCCESS);
if (svd[1].sd_want != W_EXIT) {
svd[1].sd_want = W_EXIT;
/* stopservice(&svd[1]); */
update_status(&svd[1]);
close(logpipe.wr);
close(logpipe.rd);
}
}
} /* for (;;) */
/* not reached */
return 0;
}
int sv_main(int argc, char **argv)
{
unsigned opt;
unsigned i, want_exit;
char *x;
for (i = strlen(*argv); i; --i)
if ((*argv)[i-1] == '/')
break;
*argv += i;
service = argv;
services = 1;
if ((x = getenv("SVDIR"))) varservice = x;
if ((x = getenv("SVWAIT"))) waitsec = xatoul(x);
/* TODO: V can be handled internally by getopt_ulflags */
opt = getopt32(argc, argv, "w:vV", &x);
if (opt & 1) waitsec = xatoul(x);
if (opt & 2) verbose = 1;
if (opt & 4) usage();
if (!(action = *argv++)) usage();
--argc;
service = argv; services = argc;
if (!*service) usage();
taia_now(&tnow); tstart = tnow;
if ((curdir = open_read(".")) == -1)
fatal_cannot("open current directory");
act = &control; acts = "s";
if (verbose) cbk = ✓
switch (*action) {
case 'x': case 'e':
acts = "x"; break;
case 'X': case 'E':
acts = "x"; kll = 1; cbk = ✓ break;
case 'D':
acts = "d"; kll = 1; cbk = ✓ break;
case 'T':
acts = "tc"; kll = 1; cbk = ✓ break;
case 'c':
if (!str_diff(action, "check")) {
act = 0;
acts = "c";
cbk = ✓
break;
}
case 'u': case 'd': case 'o': case 't': case 'p': case 'h':
case 'a': case 'i': case 'k': case 'q': case '1': case '2':
action[1] = 0; acts = action; break;
case 's':
if (!str_diff(action, "shutdown")) {
acts = "x";
cbk = ✓
break;
}
if (!str_diff(action, "start")) {
acts = "u";
cbk = ✓
break;
}
if (!str_diff(action, "stop")) {
acts = "d";
cbk = ✓
break;
}
act = &status; cbk = 0; break;
case 'r':
if (!str_diff(action, "restart")) {
acts = "tcu";
cbk = ✓
break;
}
usage();
case 'f':
if (!str_diff(action, "force-reload"))
{ acts = "tc"; kll = 1; cbk = ✓ break; }
if (!str_diff(action, "force-restart"))
{ acts = "tcu"; kll = 1; cbk = ✓ break; }
if (!str_diff(action, "force-shutdown"))
{ acts = "x"; kll = 1; cbk = ✓ break; }
if (!str_diff(action, "force-stop"))
{ acts = "d"; kll = 1; cbk = ✓ break; }
default:
usage();
}
servicex = service;
for (i = 0; i < services; ++i) {
if ((**service != '/') && (**service != '.')) {
if ((chdir(varservice) == -1) || (chdir(*service) == -1)) {
fail("cannot change to service directory");
*service = 0;
}
} else if (chdir(*service) == -1) {
fail("cannot change to service directory");
*service = 0;
}
if (*service) if (act && (act(acts) == -1)) *service = 0;
if (fchdir(curdir) == -1) fatal_cannot("change to original directory");
service++;
}
if (*cbk)
for (;;) {
taia_sub(&tdiff, &tnow, &tstart);
service = servicex; want_exit = 1;
for (i = 0; i < services; ++i, ++service) {
if (!*service) continue;
if ((**service != '/') && (**service != '.')) {
if ((chdir(varservice) == -1) || (chdir(*service) == -1)) {
fail("cannot change to service directory");
*service = 0;
}
} else if (chdir(*service) == -1) {
fail("cannot change to service directory");
*service = 0;
}
if (*service) { if (cbk(acts) != 0) *service = 0; else want_exit = 0; }
if (*service && taia_approx(&tdiff) > waitsec) {
kll ? printf(KILL) : printf(TIMEOUT);
if (svstatus_get() > 0) { svstatus_print(*service); ++rc; }
puts(""); /* will also flush the output */
if (kll) control("k");
*service = 0;
}
if (fchdir(curdir) == -1)
fatal_cannot("change to original directory");
}
if (want_exit) break;
usleep(420000);
taia_now(&tnow);
}
return rc > 99 ? 99 : rc;
}
