diff options
Diffstat (limited to 'kbx')
| -rw-r--r-- | kbx/kbx-client-util.c | 54 | ||||
| -rw-r--r-- | kbx/kbxserver.c | 26 | ||||
| -rw-r--r-- | kbx/keyboxd.c | 381 |
3 files changed, 280 insertions, 181 deletions
diff --git a/kbx/kbx-client-util.c b/kbx/kbx-client-util.c index f6456a508..b900586c8 100644 --- a/kbx/kbx-client-util.c +++ b/kbx/kbx-client-util.c @@ -53,6 +53,7 @@ struct kbx_client_data_s /* Condition variable to sync the datastream with the command. */ npth_mutex_t mutex; npth_cond_t cond; + npth_t thd; /* The data received from the keyboxd and an error code if there was * a problem (in which case DATA is also set to NULL. This is only @@ -103,7 +104,6 @@ prepare_data_pipe (kbx_client_data_t kcd) int rc; int inpipe[2]; estream_t infp; - npth_t thread; npth_attr_t tattr; kcd->fp = NULL; @@ -118,14 +118,18 @@ prepare_data_pipe (kbx_client_data_t kcd) return err; /* That should not happen. */ } - err = assuan_sendfd (kcd->ctx, INT2FD (inpipe[1])); +#ifdef HAVE_W32_SYSTEM + err = assuan_sendfd (kcd->ctx, (HANDLE)_get_osfhandle (inpipe[1])); +#else + err = assuan_sendfd (kcd->ctx, inpipe[1]); +#endif if (err) { - log_error ("sending sending fd %d to keyboxd: %s <%s>\n", + log_error ("sending fd %d to keyboxd: %s <%s>\n", inpipe[1], gpg_strerror (err), gpg_strsource (err)); es_fclose (infp); gnupg_close_pipe (inpipe[1]); - return 0; /* Server may not support fd-passing. */ + return err; } err = assuan_transact (kcd->ctx, "OUTPUT FD", @@ -135,12 +139,12 @@ prepare_data_pipe (kbx_client_data_t kcd) log_info ("keyboxd does not accept our fd: %s <%s>\n", gpg_strerror (err), gpg_strsource (err)); es_fclose (infp); - return 0; + return err; } + close (inpipe[1]); kcd->fp = infp; - rc = npth_attr_init (&tattr); if (rc) { @@ -150,8 +154,8 @@ prepare_data_pipe (kbx_client_data_t kcd) kcd->fp = NULL; return err; } - npth_attr_setdetachstate (&tattr, NPTH_CREATE_DETACHED); - rc = npth_create (&thread, &tattr, datastream_thread, kcd); + npth_attr_setdetachstate (&tattr, NPTH_CREATE_JOINABLE); + rc = npth_create (&kcd->thd, &tattr, datastream_thread, kcd); if (rc) { err = gpg_error_from_errno (rc); @@ -162,6 +166,7 @@ prepare_data_pipe (kbx_client_data_t kcd) return err; } + npth_attr_destroy (&tattr); return 0; } @@ -193,13 +198,8 @@ datastream_thread (void *arg) gnupg_sleep (1); continue; } - if (nread != 4) - { - err = gpg_error (GPG_ERR_EIO); - log_error ("error reading data length from keyboxd: %s\n", - "short read"); - continue; - } + if (nread < 4) + break; datalen = buf32_to_size_t (lenbuf); /* log_debug ("keyboxd announced %zu bytes\n", datalen); */ @@ -294,8 +294,7 @@ kbx_client_data_new (kbx_client_data_t *r_kcd, assuan_context_t ctx, { err = gpg_error_from_errno (rc); log_error ("error initializing mutex: %s\n", gpg_strerror (err)); - xfree (kcd); - return err; + goto leave; /* Use D-lines. */ } rc = npth_cond_init (&kcd->cond, NULL); if (rc) @@ -303,8 +302,7 @@ kbx_client_data_new (kbx_client_data_t *r_kcd, assuan_context_t ctx, err = gpg_error_from_errno (rc); log_error ("error initializing condition: %s\n", gpg_strerror (err)); npth_mutex_destroy (&kcd->mutex); - xfree (kcd); - return err; + goto leave; /* Use D-lines. */ } err = prepare_data_pipe (kcd); @@ -312,8 +310,7 @@ kbx_client_data_new (kbx_client_data_t *r_kcd, assuan_context_t ctx, { npth_cond_destroy (&kcd->cond); npth_mutex_destroy (&kcd->mutex); - xfree (kcd); - return err; + /* Use D-lines. */ } leave: @@ -329,11 +326,20 @@ kbx_client_data_release (kbx_client_data_t kcd) if (!kcd) return; + fp = kcd->fp; + if (!fp) + { + xfree (kcd); + return; + } + + if (npth_join (kcd->thd, NULL)) + log_error ("kbx_client_data_release failed on npth_join"); + kcd->fp = NULL; - es_fclose (fp); /* That close should let the thread run into an error. */ - /* FIXME: Make thread killing explicit. Otherwise we run in a - * log_fatal due to the destroyed mutex. */ + es_fclose (fp); + npth_cond_destroy (&kcd->cond); npth_mutex_destroy (&kcd->mutex); xfree (kcd); diff --git a/kbx/kbxserver.c b/kbx/kbxserver.c index ae9ae5c75..d09a8f8eb 100644 --- a/kbx/kbxserver.c +++ b/kbx/kbxserver.c @@ -131,21 +131,25 @@ get_assuan_ctx_from_ctrl (ctrl_t ctrl) static gpg_error_t prepare_outstream (ctrl_t ctrl) { - int fd; + gnupg_fd_t fd; + estream_t out_fp = NULL; log_assert (ctrl && ctrl->server_local); if (ctrl->server_local->outstream) return 0; /* Already enabled. */ - fd = translate_sys2libc_fd - (assuan_get_output_fd (get_assuan_ctx_from_ctrl (ctrl)), 1); - if (fd == -1) + fd = assuan_get_output_fd (get_assuan_ctx_from_ctrl (ctrl)); + if (fd == GNUPG_INVALID_FD) return 0; /* No Output command active. */ + else + { + out_fp = open_stream_nc (fd, "w"); + if (!out_fp) + return gpg_err_code_from_syserror (); + } - ctrl->server_local->outstream = es_fdopen_nc (fd, "w"); - if (!ctrl->server_local->outstream) - return gpg_err_code_from_syserror (); + ctrl->server_local->outstream = out_fp; return 0; } @@ -946,15 +950,9 @@ kbxd_start_command_handler (ctrl_t ctrl, gnupg_fd_t fd, unsigned int session_id) } else { - /* The fd-passing does not work reliable on Windows, and even it - * it is not used by gpg and gpgsm the current libassuan slows - * down things if it is allowed for the server.*/ rc = assuan_init_socket_server (ctx, fd, (ASSUAN_SOCKET_SERVER_ACCEPTED -#ifndef HAVE_W32_SYSTEM - |ASSUAN_SOCKET_SERVER_FDPASSING -#endif - )); + |ASSUAN_SOCKET_SERVER_FDPASSING)); } if (rc) diff --git a/kbx/keyboxd.c b/kbx/keyboxd.c index f875e115d..73905eb7d 100644 --- a/kbx/keyboxd.c +++ b/kbx/keyboxd.c @@ -144,14 +144,13 @@ static struct debug_flags_s debug_flags [] = { 77, NULL } /* 77 := Do not exit on "help" or "?". */ }; -/* The timer tick used for housekeeping stuff. Note that on Windows - * we use a SetWaitableTimer seems to signal earlier than about 2 - * seconds. Thus we use 4 seconds on all platforms. - * CHECK_OWN_SOCKET_INTERVAL defines how often we check - * our own socket in standard socket mode. If that value is 0 we - * don't check at all. All values are in seconds. */ -# define TIMERTICK_INTERVAL (4) -# define CHECK_OWN_SOCKET_INTERVAL (60) +/* CHECK_OWN_SOCKET_INTERVAL defines how often we check our own socket + * in standard socket mode. If that value is 0 we don't check at all. + * Values is in seconds. */ +#define CHECK_OWN_SOCKET_INTERVAL (60) +/* CHECK_PROBLEMS_INTERVAL defines how often we check the existence of + * homedir. Value is in seconds. */ +#define CHECK_PROBLEMS_INTERVAL (4) /* The list of open file descriptors at startup. Note that this list * has been allocated using the standard malloc. */ @@ -171,8 +170,10 @@ static int shutdown_pending; /* Flag indicating to start the daemon even if one already runs. */ static int steal_socket; -/* Counter for the currently running own socket checks. */ -static int check_own_socket_running; +/* Flag to monitor problems. */ +static int problem_detected; +#define KEYBOXD_PROBLEM_SOCKET_TAKEOVER (1 << 0) +#define KEYBOXD_PROBLEM_HOMEDIR_REMOVED (1 << 1) /* Flag to indicate that we shall not watch our own socket. */ static int disable_check_own_socket; @@ -192,6 +193,17 @@ static assuan_sock_nonce_t socket_nonce; * Let's try this as default. Change at runtime with --listen-backlog. */ static int listen_backlog = 64; +#ifdef HAVE_W32_SYSTEM +/* The event to break the select call. */ +static HANDLE the_event2; +#elif defined(HAVE_PSELECT_NO_EINTR) +/* An FD to break the select call. */ +static int event_pipe_fd; +#else +/* PID of the main thread. */ +static pid_t main_thread_pid; +#endif + /* Name of a config file, which will be reread on a HUP if it is not NULL. */ static char *config_filename; @@ -199,16 +211,6 @@ static char *config_filename; * the log file after a SIGHUP if it didn't changed. Malloced. */ static char *current_logfile; -/* This flag is true if the inotify mechanism for detecting the - * removal of the homedir is active. This flag is used to disable the - * alternative but portable stat based check. */ -static int have_homedir_inotify; - -/* Depending on how keyboxd was started, the homedir inotify watch may - * not be reliable. This flag is set if we assume that inotify works - * reliable. */ -static int reliable_homedir_inotify; - /* Number of active connections. */ static int active_connections; @@ -255,12 +257,11 @@ static void kbxd_init_default_ctrl (ctrl_t ctrl); static void kbxd_deinit_default_ctrl (ctrl_t ctrl); static void handle_connections (gnupg_fd_t listen_fd); -static void check_own_socket (void); static int check_for_running_kbxd (int silent); - -/* Pth wrapper function definitions. */ -ASSUAN_SYSTEM_NPTH_IMPL; - +#if CHECK_OWN_SOCKET_INTERVAL > 0 +static void *check_own_socket_thread (void *arg); +#endif +static void *check_others_thread (void *arg); /* * Functions. @@ -440,6 +441,7 @@ thread_init_once (void) * initialized and thus Libgcrypt could not set its system call * clamp. */ gcry_control (GCRYCTL_REINIT_SYSCALL_CLAMP, 0, 0); + assuan_control (ASSUAN_CONTROL_REINIT_SYSCALL_CLAMP, NULL); } @@ -447,7 +449,6 @@ static void initialize_modules (void) { thread_init_once (); - assuan_set_system_hooks (ASSUAN_SYSTEM_NPTH); } @@ -497,7 +498,6 @@ main (int argc, char **argv ) assuan_set_malloc_hooks (&malloc_hooks); assuan_set_gpg_err_source (GPG_ERR_SOURCE_DEFAULT); assuan_sock_init (); - assuan_sock_set_system_hooks (ASSUAN_SYSTEM_NPTH); setup_libassuan_logging (&opt.debug, kbxd_assuan_log_monitor); setup_libgcrypt_logging (); @@ -809,11 +809,6 @@ main (int argc, char **argv ) log_get_prefix (&oldflags); log_set_prefix (NULL, oldflags | GPGRT_LOG_RUN_DETACHED); opt.running_detached = 1; - - /* Because we don't support running a program on the command - * line we can assume that the inotify things works and thus - * we can avoid the regular stat calls. */ - reliable_homedir_inotify = 1; } { @@ -1070,6 +1065,44 @@ get_kbxd_active_connection_count (void) } +/* Under W32, this function returns the handle of the scdaemon + notification event. Calling it the first time creates that + event. */ +#if defined(HAVE_W32_SYSTEM) +static void * +create_an_event (void) +{ + HANDLE h, h2; + SECURITY_ATTRIBUTES sa = { sizeof (SECURITY_ATTRIBUTES), NULL, TRUE}; + + /* We need to use a manual reset event object due to the way our + w32-pth wait function works: If we would use an automatic + reset event we are not able to figure out which handle has + been signaled because at the time we single out the signaled + handles using WFSO the event has already been reset due to + the WFMO. */ + h = CreateEvent (&sa, TRUE, FALSE, NULL); + if (!h) + log_error ("can't create an event: %s\n", w32_strerror (-1) ); + else if (!DuplicateHandle (GetCurrentProcess(), h, + GetCurrentProcess(), &h2, + EVENT_MODIFY_STATE|SYNCHRONIZE, TRUE, 0)) + { + log_error ("setting synchronize for an event failed: %s\n", + w32_strerror (-1) ); + CloseHandle (h); + } + else + { + CloseHandle (h); + return h2; + } + + return INVALID_HANDLE_VALUE; +} +#endif /*HAVE_W32_SYSTEM*/ + + /* Create a name for the socket in the home directory as using * STANDARD_NAME. We also check for valid characters as well as * against a maximum allowed length for a Unix domain socket is done. @@ -1282,38 +1315,6 @@ create_directories (void) -/* This is the worker for the ticker. It is called every few seconds - * and may only do fast operations. */ -static void -handle_tick (void) -{ - static time_t last_minute; - struct stat statbuf; - - if (!last_minute) - last_minute = time (NULL); - - /* Code to be run from time to time. */ -#if CHECK_OWN_SOCKET_INTERVAL > 0 - if (last_minute + CHECK_OWN_SOCKET_INTERVAL <= time (NULL)) - { - check_own_socket (); - last_minute = time (NULL); - } -#endif - - - /* Check whether the homedir is still available. */ - if (!shutdown_pending - && (!have_homedir_inotify || !reliable_homedir_inotify) - && gnupg_stat (gnupg_homedir (), &statbuf) && errno == ENOENT) - { - shutdown_pending = 1; - log_info ("homedir has been removed - shutting down\n"); - } -} - - /* A global function which allows us to call the reload stuff from * other places too. This is only used when build for W32. */ void @@ -1359,6 +1360,11 @@ handle_signal (int signo) kbxd_sigusr2_action (); break; + case SIGCONT: + /* Do nothing, but break the syscall. */ + log_debug ("SIGCONT received - breaking select\n"); + break; + case SIGTERM: if (!shutdown_pending) log_info ("SIGTERM received - shutting down ...\n"); @@ -1396,7 +1402,7 @@ check_nonce (ctrl_t ctrl, assuan_sock_nonce_t *nonce) if (assuan_sock_check_nonce (ctrl->thread_startup.fd, nonce)) { log_info (_("error reading nonce on fd %d: %s\n"), - FD2INT(ctrl->thread_startup.fd), strerror (errno)); + FD_DBG (ctrl->thread_startup.fd), strerror (errno)); assuan_sock_close (ctrl->thread_startup.fd); xfree (ctrl); return -1; @@ -1416,7 +1422,7 @@ do_start_connection_thread (ctrl_t ctrl) kbxd_init_default_ctrl (ctrl); if (opt.verbose && !DBG_IPC) log_info (_("handler 0x%lx for fd %d started\n"), - (unsigned long) npth_self(), FD2INT(ctrl->thread_startup.fd)); + (unsigned long) npth_self(), FD_DBG (ctrl->thread_startup.fd)); session_id = ++last_session_id; if (!session_id) @@ -1424,7 +1430,7 @@ do_start_connection_thread (ctrl_t ctrl) kbxd_start_command_handler (ctrl, ctrl->thread_startup.fd, session_id); if (opt.verbose && !DBG_IPC) log_info (_("handler 0x%lx for fd %d terminated\n"), - (unsigned long) npth_self(), FD2INT(ctrl->thread_startup.fd)); + (unsigned long) npth_self(), FD_DBG (ctrl->thread_startup.fd)); kbxd_deinit_default_ctrl (ctrl); xfree (ctrl); @@ -1450,6 +1456,28 @@ start_connection_thread (void *arg) } +static void +keyboxd_kick_the_loop (void) +{ + /* Kick the select loop. */ +#ifdef HAVE_W32_SYSTEM + int ret = SetEvent (the_event2); + if (ret == 0) + log_error ("SetEvent for agent_kick_the_loop failed: %s\n", + w32_strerror (-1)); +#else +# ifdef HAVE_PSELECT_NO_EINTR + write (event_pipe_fd, "", 1); +# else + int ret = kill (main_thread_pid, SIGCONT); + if (ret < 0) + log_error ("sending signal for agent_kick_the_loop failed: %s\n", + gpg_strerror (gpg_error_from_syserror ())); +# endif +#endif +} + + /* Connection handler loop. Wait for connection requests and spawn a * thread after accepting a connection. */ static void @@ -1464,12 +1492,14 @@ handle_connections (gnupg_fd_t listen_fd) gnupg_fd_t fd; int nfd; int saved_errno; - struct timespec abstime; - struct timespec curtime; - struct timespec timeout; #ifdef HAVE_W32_SYSTEM HANDLE events[2]; unsigned int events_set; +#else + int signo; +# ifdef HAVE_PSELECT_NO_EINTR + int pipe_fd[2]; +# endif #endif int sock_inotify_fd = -1; int home_inotify_fd = -1; @@ -1480,7 +1510,7 @@ handle_connections (gnupg_fd_t listen_fd) } listentbl[] = { { "std", start_connection_thread }, }; - + int have_homedir_inotify = 0; ret = npth_attr_init(&tattr); if (ret) @@ -1493,10 +1523,23 @@ handle_connections (gnupg_fd_t listen_fd) npth_sigev_add (SIGUSR1); npth_sigev_add (SIGUSR2); npth_sigev_add (SIGINT); + npth_sigev_add (SIGCONT); npth_sigev_add (SIGTERM); npth_sigev_fini (); +# ifdef HAVE_PSELECT_NO_EINTR + ret = gnupg_create_pipe (pipe_fd); + if (ret) + { + log_error ("pipe creation failed: %s\n", gpg_strerror (ret)); + return; + } + event_pipe_fd = pipe_fd[1]; +# else + main_thread_pid = getpid (); +# endif #else - events[0] = INVALID_HANDLE_VALUE; + events[0] = the_event2 = create_an_event (); + events[1] = INVALID_HANDLE_VALUE; #endif if (disable_check_own_socket) @@ -1508,10 +1551,8 @@ handle_connections (gnupg_fd_t listen_fd) gpg_strerror (err)); } - if (disable_check_own_socket) - home_inotify_fd = -1; - else if ((err = gnupg_inotify_watch_delete_self (&home_inotify_fd, - gnupg_homedir ()))) + if ((err = gnupg_inotify_watch_delete_self (&home_inotify_fd, + gnupg_homedir ()))) { if (gpg_err_code (err) != GPG_ERR_NOT_SUPPORTED) log_info ("error enabling daemon termination by homedir removal: %s\n", @@ -1520,9 +1561,29 @@ handle_connections (gnupg_fd_t listen_fd) else have_homedir_inotify = 1; +#if CHECK_OWN_SOCKET_INTERVAL > 0 + if (!disable_check_own_socket && sock_inotify_fd == -1) + { + npth_t thread; + + err = npth_create (&thread, &tattr, check_own_socket_thread, NULL); + if (err) + log_error ("error spawning check_own_socket_thread: %s\n", strerror (err)); + } +#endif + + if (!have_homedir_inotify) + { + npth_t thread; + + err = npth_create (&thread, &tattr, check_others_thread, NULL); + if (err) + log_error ("error spawning check_others_thread: %s\n", strerror (err)); + } + FD_ZERO (&fdset); FD_SET (FD2INT (listen_fd), &fdset); - nfd = FD2INT (listen_fd); + nfd = FD2NUM (listen_fd); if (sock_inotify_fd != -1) { FD_SET (sock_inotify_fd, &fdset); @@ -1538,9 +1599,6 @@ handle_connections (gnupg_fd_t listen_fd) listentbl[0].l_fd = listen_fd; - npth_clock_gettime (&abstime); - abstime.tv_sec += TIMERTICK_INTERVAL; - for (;;) { /* Shutdown test. */ @@ -1573,28 +1631,21 @@ handle_connections (gnupg_fd_t listen_fd) read_fdset = fdset; - npth_clock_gettime (&curtime); - if (!(npth_timercmp (&curtime, &abstime, <))) - { - /* Timeout. */ - handle_tick (); - npth_clock_gettime (&abstime); - abstime.tv_sec += TIMERTICK_INTERVAL; - } - npth_timersub (&abstime, &curtime, &timeout); +#ifdef HAVE_PSELECT_NO_EINTR + FD_SET (pipe_fd[0], &read_fdset); + if (nfd < pipe_fd[0]) + nfd = pipe_fd[0]; +#endif #ifndef HAVE_W32_SYSTEM - ret = npth_pselect (nfd+1, &read_fdset, NULL, NULL, &timeout, + ret = npth_pselect (nfd+1, &read_fdset, NULL, NULL, NULL, npth_sigev_sigmask ()); saved_errno = errno; - { - int signo; - while (npth_sigev_get_pending (&signo)) - handle_signal (signo); - } + while (npth_sigev_get_pending (&signo)) + handle_signal (signo); #else - ret = npth_eselect (nfd+1, &read_fdset, NULL, NULL, &timeout, + ret = npth_eselect (nfd+1, &read_fdset, NULL, NULL, NULL, events, &events_set); saved_errno = errno; @@ -1610,6 +1661,22 @@ handle_connections (gnupg_fd_t listen_fd) gnupg_sleep (1); continue; } + + if ((problem_detected & KEYBOXD_PROBLEM_SOCKET_TAKEOVER)) + { + /* We may not remove the socket as it is now in use by another + server. */ + inhibit_socket_removal = 1; + shutdown_pending = 2; + log_info ("this process is useless - shutting down\n"); + } + + if ((problem_detected & KEYBOXD_PROBLEM_HOMEDIR_REMOVED)) + { + shutdown_pending = 1; + log_info ("homedir has been removed - shutting down\n"); + } + if (ret <= 0) { /* Interrupt or timeout. Will be handled when calculating the @@ -1617,6 +1684,15 @@ handle_connections (gnupg_fd_t listen_fd) continue; } +#ifdef HAVE_PSELECT_NO_EINTR + if (FD_ISSET (pipe_fd[0], &read_fdset)) + { + char buf[256]; + + read (pipe_fd[0], buf, sizeof buf); + } +#endif + /* The inotify fds are set even when a shutdown is pending (see * above). So we must handle them in any case. To avoid that * they trigger a second time we close them immediately. */ @@ -1653,8 +1729,8 @@ handle_connections (gnupg_fd_t listen_fd) continue; plen = sizeof paddr; - fd = INT2FD (npth_accept (FD2INT(listentbl[idx].l_fd), - (struct sockaddr *)&paddr, &plen)); + fd = assuan_sock_accept (listentbl[idx].l_fd, + (struct sockaddr *)&paddr, &plen); if (fd == GNUPG_INVALID_FD) { log_error ("accept failed for %s: %s\n", @@ -1687,13 +1763,21 @@ handle_connections (gnupg_fd_t listen_fd) close (sock_inotify_fd); if (home_inotify_fd != -1) close (home_inotify_fd); +#ifdef HAVE_W32_SYSTEM + if (the_event2 != INVALID_HANDLE_VALUE) + CloseHandle (the_event2); +#endif +#ifdef HAVE_PSELECT_NO_EINTR + close (pipe_fd[0]); + close (pipe_fd[1]); +#endif cleanup (); log_info (_("%s %s stopped\n"), gpgrt_strusage(11), gpgrt_strusage(13)); npth_attr_destroy (&tattr); } - +#if CHECK_OWN_SOCKET_INTERVAL > 0 /* Helper for check_own_socket. */ static gpg_error_t check_own_socket_pid_cb (void *opaque, const void *buffer, size_t length) @@ -1704,20 +1788,18 @@ check_own_socket_pid_cb (void *opaque, const void *buffer, size_t length) } -/* The thread running the actual check. We need to run this in a - * separate thread so that check_own_thread can be called from the - * timer tick. */ -static void * -check_own_socket_thread (void *arg) +/* Check whether we are still listening on our own socket. In case + another gpg-agent process started after us has taken ownership of + our socket, we would linger around without any real task. Thus we + better check once in a while whether we are really needed. */ +static int +do_check_own_socket (const char *sockname) { int rc; - char *sockname = arg; assuan_context_t ctx = NULL; membuf_t mb; char *buffer; - check_own_socket_running++; - rc = assuan_new (&ctx); if (rc) { @@ -1755,57 +1837,70 @@ check_own_socket_thread (void *arg) xfree (buffer); leave: - xfree (sockname); if (ctx) assuan_release (ctx); - if (rc) - { - /* We may not remove the socket as it is now in use by another - * server. */ - inhibit_socket_removal = 1; - shutdown_pending = 2; - log_info ("this process is useless - shutting down\n"); - } - check_own_socket_running--; - return NULL; -} + return rc; +} -/* Check whether we are still listening on our own socket. In case - * another keyboxd process started after us has taken ownership of our - * socket, we would linger around without any real task. Thus we - * better check once in a while whether we are really needed. */ -static void -check_own_socket (void) +/* The thread running the actual check. */ +static void * +check_own_socket_thread (void *arg) { char *sockname; - npth_t thread; - npth_attr_t tattr; - int err; - if (disable_check_own_socket) - return; - - if (check_own_socket_running || shutdown_pending) - return; /* Still running or already shutting down. */ + (void)arg; sockname = make_filename_try (gnupg_socketdir (), KEYBOXD_SOCK_NAME, NULL); if (!sockname) - return; /* Out of memory. */ + return NULL; /* Out of memory. */ - err = npth_attr_init (&tattr); - if (err) + while (!problem_detected) { - xfree (sockname); - return; + if (shutdown_pending) + goto leave; + + gnupg_sleep (CHECK_OWN_SOCKET_INTERVAL); + + if (do_check_own_socket (sockname)) + problem_detected |= KEYBOXD_PROBLEM_SOCKET_TAKEOVER; } - npth_attr_setdetachstate (&tattr, NPTH_CREATE_DETACHED); - err = npth_create (&thread, &tattr, check_own_socket_thread, sockname); - if (err) - log_error ("error spawning check_own_socket_thread: %s\n", strerror (err)); - npth_attr_destroy (&tattr); + + keyboxd_kick_the_loop (); + + leave: + xfree (sockname); + return NULL; } +#endif + +/* The thread running other checks. */ +static void * +check_others_thread (void *arg) +{ + const char *homedir = gnupg_homedir (); + (void)arg; + + while (!problem_detected) + { + struct stat statbuf; + + if (shutdown_pending) + goto leave; + + gnupg_sleep (CHECK_PROBLEMS_INTERVAL); + + /* Check whether the homedir is still available. */ + if (gnupg_stat (homedir, &statbuf) && errno == ENOENT) + problem_detected |= KEYBOXD_PROBLEM_HOMEDIR_REMOVED; + } + + keyboxd_kick_the_loop (); + + leave: + return NULL; +} /* Figure out whether a keyboxd is available and running. Prints an |