mirror of
https://github.com/tmux/tmux.git
synced 2026-10-16 00:14:23 +00:00
bba451c959
The server otherwise keeps the session keyring of the login session that started it, which pam_keyinit(8) may revoke when that session ends, leaving the server and its panes unable to use the kernel keyring. Join a new session keyring with the user keyring linked in once the configuration file has been loaded, and revoke it when the server exits. This is controlled by a new session-keyring server option, on by default.
43 lines
1.0 KiB
C
43 lines
1.0 KiB
C
#include <sys/types.h>
|
|
#include <sys/syscall.h>
|
|
|
|
#include <linux/keyctl.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "tmux.h"
|
|
|
|
/* Serial of the session keyring we joined, or 0 if none. */
|
|
static long keyring_serial;
|
|
|
|
/*
|
|
* Create a new session keyring since the current one belongs to the login
|
|
* session which we're meant to outlive (and pam_keyinit(8) is likely to revoke
|
|
* the login session's keyring when it ends).
|
|
*/
|
|
void
|
|
keyring_join(void)
|
|
{
|
|
long serial;
|
|
|
|
serial = syscall(SYS_keyctl, KEYCTL_JOIN_SESSION_KEYRING, NULL);
|
|
if (serial == -1) {
|
|
log_debug("%s: join failed: %s", __func__, strerror(errno));
|
|
return;
|
|
}
|
|
if (syscall(SYS_keyctl, KEYCTL_LINK, KEY_SPEC_USER_KEYRING,
|
|
KEY_SPEC_SESSION_KEYRING) == -1)
|
|
log_debug("%s: link failed: %s", __func__, strerror(errno));
|
|
keyring_serial = serial;
|
|
}
|
|
|
|
void
|
|
keyring_revoke(void)
|
|
{
|
|
if (keyring_serial == 0)
|
|
return;
|
|
if (syscall(SYS_keyctl, KEYCTL_REVOKE, keyring_serial) == -1)
|
|
log_debug("%s: revoke failed: %s", __func__, strerror(errno));
|
|
}
|