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90cc41de32
Join the new session keyring when the server starts rather than once the configuration file has been loaded, and control it at build time with --enable-keyring, on by default if linux/keyctl.h is found. Rename keyring_join and keyring_revoke to new_session_keyring and revoke_session_keyring.
43 lines
1.0 KiB
C
43 lines
1.0 KiB
C
#include <sys/types.h>
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#include <sys/syscall.h>
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#include <linux/keyctl.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include "tmux.h"
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/* Serial of the session keyring we joined, or 0 if none. */
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static long keyring_serial;
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/*
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* Create a new session keyring since the current one belongs to the login
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* session which we're meant to outlive (and pam_keyinit(8) is likely to revoke
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* the login session's keyring when it ends).
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*/
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void
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new_session_keyring(void)
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{
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long serial;
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serial = syscall(SYS_keyctl, KEYCTL_JOIN_SESSION_KEYRING, NULL);
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if (serial == -1) {
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log_debug("%s: join failed: %s", __func__, strerror(errno));
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return;
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}
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if (syscall(SYS_keyctl, KEYCTL_LINK, KEY_SPEC_USER_KEYRING,
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KEY_SPEC_SESSION_KEYRING) == -1)
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log_debug("%s: link failed: %s", __func__, strerror(errno));
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keyring_serial = serial;
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}
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void
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revoke_session_keyring(void)
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{
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if (keyring_serial == 0)
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return;
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if (syscall(SYS_keyctl, KEYCTL_REVOKE, keyring_serial) == -1)
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log_debug("%s: revoke failed: %s", __func__, strerror(errno));
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}
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