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Add a -D flag to ask tmux not to daemonize, useful both for running a

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debugger (lldb does not have follow-fork-mode) and for running with a
managed supervisor init system. GitHub issue 2190.
This commit is contained in:
nicm
2020-05-16 16:07:55 +00:00
parent 126bacb473
commit dceb6a15d0
7 changed files with 73 additions and 25 deletions
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44
server.c
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@ -161,29 +161,35 @@ server_start(struct tmuxproc *client, int flags, struct event_base *base,
struct client *c;
char *cause = NULL;
if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pair) != 0)
fatal("socketpair failed");
server_client_flags = flags;
sigfillset(&set);
sigprocmask(SIG_BLOCK, &set, &oldset);
switch (fork()) {
case -1:
fatal("fork failed");
case 0:
break;
default:
sigprocmask(SIG_SETMASK, &oldset, NULL);
close(pair[1]);
return (pair[0]);
if (~flags & CLIENT_NOFORK) {
if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pair) != 0)
fatal("socketpair failed");
switch (fork()) {
case -1:
fatal("fork failed");
case 0:
break;
default:
sigprocmask(SIG_SETMASK, &oldset, NULL);
close(pair[1]);
return (pair[0]);
}
close(pair[0]);
if (daemon(1, 0) != 0)
fatal("daemon failed");
}
close(pair[0]);
if (daemon(1, 0) != 0)
fatal("daemon failed");
server_client_flags = flags;
proc_clear_signals(client, 0);
if (event_reinit(base) != 0)
fatalx("event_reinit failed");
server_proc = proc_start("server");
proc_set_signals(server_proc, server_signal);
sigprocmask(SIG_SETMASK, &oldset, NULL);
@ -205,7 +211,10 @@ server_start(struct tmuxproc *client, int flags, struct event_base *base,
server_fd = server_create_socket(flags, &cause);
if (server_fd != -1)
server_update_socket();
c = server_client_create(pair[1]);
if (~flags & CLIENT_NOFORK)
c = server_client_create(pair[1]);
else
options_set_number(global_options, "exit-empty", 0);
if (lockfd >= 0) {
unlink(lockfile);
@ -396,6 +405,7 @@ server_signal(int sig)
log_debug("%s: %s", __func__, strsignal(sig));
switch (sig) {
case SIGINT:
case SIGTERM:
server_exit = 1;
server_send_exit();