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Add an ACL list for users connecting to the tmux socket. Users may be forbidden

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from attaching, forced to attach read-only, or allowed to attach read-write. A
new command, server-access, configures the list. tmux gets the user using
getpeereid(3) of the client socket. Users must still configure file system
permissions manually.
This commit is contained in:
Nicholas Marriott
2022-04-06 14:28:50 +01:00
parent 6e9a9d265e
commit d6306b634e
12 changed files with 445 additions and 14 deletions
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26
cmd-queue.c
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@ -19,9 +19,11 @@
#include <sys/types.h>
#include <ctype.h>
#include <pwd.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "tmux.h"
@ -558,17 +560,31 @@ cmdq_add_message(struct cmdq_item *item)
{
struct client *c = item->client;
struct cmdq_state *state = item->state;
const char *name, *key;
const char *key;
char *tmp;
uid_t uid;
struct passwd *pw;
char *user = NULL;
tmp = cmd_print(item->cmd);
if (c != NULL) {
name = c->name;
uid = proc_get_peer_uid(c->peer);
if (uid != getuid()) {
if ((pw = getpwuid(uid)) != NULL)
xasprintf(&user, "[%s]", pw->pw_name);
else
user = xstrdup("[unknown]");
} else
user = xstrdup("");
if (c->session != NULL && state->event.key != KEYC_NONE) {
key = key_string_lookup_key(state->event.key, 0);
server_add_message("%s key %s: %s", name, key, tmp);
} else
server_add_message("%s command: %s", name, tmp);
server_add_message("%s%s key %s: %s", c->name, user,
key, tmp);
} else {
server_add_message("%s%s command: %s", c->name, user,
tmp);
}
free(user);
} else
server_add_message("command: %s", tmp);
free(tmp);