diff options
Diffstat (limited to 'common/signal.c')
| -rw-r--r-- | common/signal.c | 226 |
1 files changed, 0 insertions, 226 deletions
diff --git a/common/signal.c b/common/signal.c deleted file mode 100644 index b150fa90a..000000000 --- a/common/signal.c +++ /dev/null @@ -1,226 +0,0 @@ -/* signal.c - signal handling - * Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. - * - * This file is part of GnuPG. - * - * GnuPG is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * GnuPG is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA - */ - -#include <config.h> -#include <stdio.h> -#include <stdlib.h> -#include <signal.h> -#include <unistd.h> -#include <string.h> -#include <errno.h> -#include <assert.h> - -#include "util.h" - - -static volatile int caught_fatal_sig = 0; -static volatile int caught_sigusr1 = 0; -static void (*cleanup_fnc)(void); - - -static void -init_one_signal (int sig, RETSIGTYPE (*handler)(int), int check_ign ) -{ -#ifndef HAVE_DOSISH_SYSTEM -# ifdef HAVE_SIGACTION - struct sigaction oact, nact; - - if (check_ign) - { - /* we don't want to change an IGN handler */ - sigaction (sig, NULL, &oact ); - if (oact.sa_handler == SIG_IGN ) - return; - } - - nact.sa_handler = handler; - sigemptyset (&nact.sa_mask); - nact.sa_flags = 0; - sigaction ( sig, &nact, NULL); -# else - RETSIGTYPE (*ohandler)(int); - - ohandler = signal (sig, handler); - if (check_ign && ohandler == SIG_IGN) - { - /* Change it back if it was already set to IGN */ - signal (sig, SIG_IGN); - } -# endif -#endif /*!HAVE_DOSISH_SYSTEM*/ -} - -static const char * -get_signal_name( int signum ) -{ -#if defined(SYS_SIGLIST_DECLARED) && defined(NSIG) - return (signum >= 0 && signum < NSIG) ? sys_siglist[signum] : "?"; -#else - return "some signal"; -#endif -} - -static RETSIGTYPE -got_fatal_signal (int sig) -{ - const char *s; - - if (caught_fatal_sig) - raise (sig); - caught_fatal_sig = 1; - - if (cleanup_fnc) - cleanup_fnc (); - /* better don't translate these messages */ - write (2, "\n", 1 ); - s = log_get_prefix (NULL); - if (s) - write(2, s, strlen (s)); - write (2, ": ", 2 ); - s = get_signal_name(sig); - write (2, s, strlen(s) ); - write (2, " caught ... exiting\n", 20); - - /* reset action to default action and raise signal again */ - init_one_signal (sig, SIG_DFL, 0); - /* fixme: remove_lockfiles ();*/ -#ifdef __riscos__ - close_fds (); -#endif /* __riscos__ */ - raise( sig ); -} - - -static RETSIGTYPE -got_usr_signal (int sig) -{ - caught_sigusr1 = 1; -} - - -void -gnupg_init_signals (int mode, void (*fast_cleanup)(void)) -{ - assert (!mode); - - cleanup_fnc = fast_cleanup; -#ifndef HAVE_DOSISH_SYSTEM - init_one_signal (SIGINT, got_fatal_signal, 1 ); - init_one_signal (SIGHUP, got_fatal_signal, 1 ); - init_one_signal (SIGTERM, got_fatal_signal, 1 ); - init_one_signal (SIGQUIT, got_fatal_signal, 1 ); - init_one_signal (SIGSEGV, got_fatal_signal, 1 ); - init_one_signal (SIGUSR1, got_usr_signal, 0 ); - init_one_signal (SIGPIPE, SIG_IGN, 0 ); -#endif -} - -void -gnupg_pause_on_sigusr (int which) -{ -#ifndef HAVE_DOSISH_SYSTEM -# ifdef HAVE_SIGPROCMASK - sigset_t mask, oldmask; - - assert (which == 1); - sigemptyset( &mask ); - sigaddset( &mask, SIGUSR1 ); - - sigprocmask( SIG_BLOCK, &mask, &oldmask ); - while (!caught_sigusr1) - sigsuspend (&oldmask); - caught_sigusr1 = 0; - sigprocmask (SIG_UNBLOCK, &mask, NULL); -# else - assert (which == 1); - sighold (SIGUSR1); - while (!caught_sigusr1) - sigpause(SIGUSR1); - caught_sigusr1 = 0; - sigrelease(SIGUSR1); -# endif /*!HAVE_SIGPROCMASK*/ -#endif -} - - -static void -do_block( int block ) -{ -#ifndef HAVE_DOSISH_SYSTEM - static int is_blocked; -#ifdef HAVE_SIGPROCMASK - static sigset_t oldmask; - - if (block) - { - sigset_t newmask; - - if (is_blocked) - log_bug ("signals are already blocked\n"); - sigfillset( &newmask ); - sigprocmask( SIG_BLOCK, &newmask, &oldmask ); - is_blocked = 1; - } - else - { - if (!is_blocked) - log_bug("signals are not blocked\n"); - sigprocmask (SIG_SETMASK, &oldmask, NULL); - is_blocked = 0; - } -#else /*!HAVE_SIGPROCMASK*/ - static void (*disposition[MAXSIG])(); - int sig; - - if (block) - { - if (is_blocked) - log_bug("signals are already blocked\n"); - for (sig=1; sig < MAXSIG; sig++) - { - disposition[sig] = sigset (sig, SIG_HOLD); - } - is_blocked = 1; - } - else - { - if (!is_blocked) - log_bug ("signals are not blocked\n"); - for (sig=1; sig < MAXSIG; sig++) { - sigset (sig, disposition[sig]); - } - is_blocked = 0; - } -#endif /*!HAVE_SIGPROCMASK*/ -#endif /*HAVE_DOSISH_SYSTEM*/ -} - - -void -gnupg_block_all_signals () -{ - do_block(1); -} - -void -gnupg_unblock_all_signals () -{ - do_block(0); -} |