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Remove the internal tmux locking and instead detach each client and run the

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command specified by a new option "lock-command" (by default "lock -np") in
each client.

This means each terminal has to be unlocked individually but simplifies the
code and allows the system password to be used to unlock.

Note that the set-password command is gone, so it will need to be removed from
configuration files, and the -U command line flag has been removed.

This is the third protocol version change so again it is best to stop the tmux
server before upgrading.
This commit is contained in:
Nicholas Marriott
2009-09-23 06:18:47 +00:00
parent 962fa20b36
commit b01dcd7971
13 changed files with 55 additions and 449 deletions
Download Patch File Download Diff File Expand all files Collapse all files

110
server-fn.c
View File

@ -18,16 +18,12 @@
#include <sys/types.h>
#include <login_cap.h>
#include <pwd.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "tmux.h"
int server_lock_callback(void *, const char *);
void
server_fill_environ(struct session *s, struct environ *env)
{
@ -161,110 +157,30 @@ server_status_window(struct window *w)
void
server_lock(void)
{
struct client *c;
static struct passwd *pw, pwstore;
static char pwbuf[_PW_BUF_LEN];
u_int i;
if (server_locked)
return;
if (getpwuid_r(getuid(), &pwstore, pwbuf, sizeof pwbuf, &pw) != 0) {
server_locked_pw = NULL;
return;
}
server_locked_pw = pw;
struct client *c;
const char *cmd;
struct msg_lock_data lockdata;
u_int i;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL || c->session == NULL)
continue;
status_prompt_clear(c);
status_prompt_set(c,
"Password:", server_lock_callback, NULL, c, PROMPT_HIDDEN);
server_redraw_client(c);
}
server_locked = 1;
}
int
server_lock_callback(unused void *data, const char *s)
{
return (server_unlock(s));
}
int
server_unlock(const char *s)
{
struct client *c;
login_cap_t *lc;
u_int i;
char *out;
u_int failures, tries, backoff;
if (!server_locked || server_locked_pw == NULL)
return (0);
server_activity = time(NULL);
if (server_activity < password_backoff)
return (-2);
if (server_password != NULL) {
if (s == NULL)
return (-1);
out = crypt(s, server_password);
if (strcmp(out, server_password) != 0)
goto wrong;
}
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL)
if (c->flags & CLIENT_SUSPENDED)
continue;
status_prompt_clear(c);
server_redraw_client(c);
}
server_locked = 0;
password_failures = 0;
password_backoff = 0;
return (0);
wrong:
password_failures++;
password_backoff = 0;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL || c->prompt_buffer == NULL)
cmd = options_get_string(&c->session->options, "lock-command");
if (strlcpy(lockdata.cmd,
cmd, sizeof lockdata.cmd) >= sizeof lockdata.cmd)
continue;
*c->prompt_buffer = '\0';
c->prompt_index = 0;
server_redraw_client(c);
}
tty_stop_tty(&c->tty);
tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_SMCUP));
tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_CLEAR));
/*
* Start slowing down after "login-backoff" attempts and reset every
* "login-tries" attempts.
*/
lc = login_getclass(server_locked_pw->pw_class);
if (lc != NULL) {
tries = login_getcapnum(lc, (char *) "login-tries", 10, 10);
backoff = login_getcapnum(lc, (char *) "login-backoff", 3, 3);
} else {
tries = 10;
backoff = 3;
c->flags |= CLIENT_SUSPENDED;
server_write_client(c, MSG_LOCK, &lockdata, sizeof lockdata);
}
failures = password_failures % tries;
if (failures > backoff) {
password_backoff =
server_activity + ((failures - backoff) * tries / 2);
return (-2);
}
return (-1);
}
void