diff options
Diffstat (limited to 'ruby_1_8_6/signal.c')
| -rw-r--r-- | ruby_1_8_6/signal.c | 1120 |
1 files changed, 0 insertions, 1120 deletions
diff --git a/ruby_1_8_6/signal.c b/ruby_1_8_6/signal.c deleted file mode 100644 index b6cad9dc84..0000000000 --- a/ruby_1_8_6/signal.c +++ /dev/null @@ -1,1120 +0,0 @@ -/********************************************************************** - - signal.c - - - $Author$ - $Date$ - created at: Tue Dec 20 10:13:44 JST 1994 - - Copyright (C) 1993-2003 Yukihiro Matsumoto - Copyright (C) 2000 Network Applied Communication Laboratory, Inc. - Copyright (C) 2000 Information-technology Promotion Agency, Japan - -**********************************************************************/ - -#include "ruby.h" -#include "rubysig.h" -#include <signal.h> -#include <stdio.h> - -#ifdef __BEOS__ -#undef SIGBUS -#endif - -#if defined HAVE_SIGPROCMASK || defined HAVE_SIGSETMASK -#define USE_TRAP_MASK 1 -#else -#define USE_TRAP_MASK 0 -#endif - -#ifndef NSIG -# ifdef DJGPP -# define NSIG SIGMAX -# else -# define NSIG (_SIGMAX + 1) /* For QNX */ -# endif -#endif - -static struct signals { - char *signm; - int signo; -} siglist [] = { - {"EXIT", 0}, -#ifdef SIGHUP - {"HUP", SIGHUP}, -#endif - {"INT", SIGINT}, -#ifdef SIGQUIT - {"QUIT", SIGQUIT}, -#endif -#ifdef SIGILL - {"ILL", SIGILL}, -#endif -#ifdef SIGTRAP - {"TRAP", SIGTRAP}, -#endif -#ifdef SIGIOT - {"IOT", SIGIOT}, -#endif -#ifdef SIGABRT - {"ABRT", SIGABRT}, -#endif -#ifdef SIGEMT - {"EMT", SIGEMT}, -#endif -#ifdef SIGFPE - {"FPE", SIGFPE}, -#endif -#ifdef SIGKILL - {"KILL", SIGKILL}, -#endif -#ifdef SIGBUS - {"BUS", SIGBUS}, -#endif -#ifdef SIGSEGV - {"SEGV", SIGSEGV}, -#endif -#ifdef SIGSYS - {"SYS", SIGSYS}, -#endif -#ifdef SIGPIPE - {"PIPE", SIGPIPE}, -#endif -#ifdef SIGALRM - {"ALRM", SIGALRM}, -#endif -#ifdef SIGTERM - {"TERM", SIGTERM}, -#endif -#ifdef SIGURG - {"URG", SIGURG}, -#endif -#ifdef SIGSTOP - {"STOP", SIGSTOP}, -#endif -#ifdef SIGTSTP - {"TSTP", SIGTSTP}, -#endif -#ifdef SIGCONT - {"CONT", SIGCONT}, -#endif -#ifdef SIGCHLD - {"CHLD", SIGCHLD}, -#endif -#ifdef SIGCLD - {"CLD", SIGCLD}, -#else -# ifdef SIGCHLD - {"CLD", SIGCHLD}, -# endif -#endif -#ifdef SIGTTIN - {"TTIN", SIGTTIN}, -#endif -#ifdef SIGTTOU - {"TTOU", SIGTTOU}, -#endif -#ifdef SIGIO - {"IO", SIGIO}, -#endif -#ifdef SIGXCPU - {"XCPU", SIGXCPU}, -#endif -#ifdef SIGXFSZ - {"XFSZ", SIGXFSZ}, -#endif -#ifdef SIGVTALRM - {"VTALRM", SIGVTALRM}, -#endif -#ifdef SIGPROF - {"PROF", SIGPROF}, -#endif -#ifdef SIGWINCH - {"WINCH", SIGWINCH}, -#endif -#ifdef SIGUSR1 - {"USR1", SIGUSR1}, -#endif -#ifdef SIGUSR2 - {"USR2", SIGUSR2}, -#endif -#ifdef SIGLOST - {"LOST", SIGLOST}, -#endif -#ifdef SIGMSG - {"MSG", SIGMSG}, -#endif -#ifdef SIGPWR - {"PWR", SIGPWR}, -#endif -#ifdef SIGPOLL - {"POLL", SIGPOLL}, -#endif -#ifdef SIGDANGER - {"DANGER", SIGDANGER}, -#endif -#ifdef SIGMIGRATE - {"MIGRATE", SIGMIGRATE}, -#endif -#ifdef SIGPRE - {"PRE", SIGPRE}, -#endif -#ifdef SIGGRANT - {"GRANT", SIGGRANT}, -#endif -#ifdef SIGRETRACT - {"RETRACT", SIGRETRACT}, -#endif -#ifdef SIGSOUND - {"SOUND", SIGSOUND}, -#endif -#ifdef SIGINFO - {"INFO", SIGINFO}, -#endif - {NULL, 0} -}; - -static int -signm2signo(nm) - const char *nm; -{ - struct signals *sigs; - - for (sigs = siglist; sigs->signm; sigs++) - if (strcmp(sigs->signm, nm) == 0) - return sigs->signo; - return 0; -} - -static char* -signo2signm(no) - int no; -{ - struct signals *sigs; - - for (sigs = siglist; sigs->signm; sigs++) - if (sigs->signo == no) - return sigs->signm; - return 0; -} - -const char * -ruby_signal_name(no) - int no; -{ - return signo2signm(no); -} - -/* - * call-seq: - * SignalException.new(sig) => signal_exception - * - * Construct a new SignalException object. +sig+ should be a known - * signal name, or a signal number. - */ - -static VALUE -esignal_init(argc, argv, self) - int argc; - VALUE *argv; - VALUE self; -{ - int argnum = 1; - VALUE sig = Qnil; - int signo; - const char *signm; - char tmpnm[(sizeof(int)*CHAR_BIT)/3+4]; - - if (argc > 0) { - sig = argv[0]; - if (FIXNUM_P(sig)) argnum = 2; - } - if (argc < 1 || argnum < argc) { - rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)", - argc, argnum); - } - if (argnum == 2) { - signo = FIX2INT(sig); - if (signo < 0 || signo > NSIG) { - rb_raise(rb_eArgError, "invalid signal number (%d)", signo); - } - if (argc > 1) { - sig = argv[1]; - } - else { - signm = signo2signm(signo); - if (signm) { - snprintf(tmpnm, sizeof(tmpnm), "SIG%s", signm); - } - else { - snprintf(tmpnm, sizeof(tmpnm), "SIG%u", signo); - } - sig = rb_str_new2(signm = tmpnm); - } - } - else { - signm = SYMBOL_P(sig) ? rb_id2name(SYM2ID(sig)) : StringValuePtr(sig); - if (strncmp(signm, "SIG", 3) == 0) signm += 3; - signo = signm2signo(signm); - if (!signo) { - rb_raise(rb_eArgError, "unsupported name `SIG%s'", signm); - } - if (SYMBOL_P(sig)) { - sig = rb_str_new2(signm); - } - } - rb_call_super(1, &sig); - rb_iv_set(self, "signo", INT2NUM(signo)); - - return self; -} - -static VALUE -interrupt_init(self, mesg) - VALUE self, mesg; -{ - VALUE argv[2]; - - argv[0] = INT2FIX(SIGINT); - argv[1] = mesg; - return rb_call_super(2, argv); -} - -void -ruby_default_signal(sig) - int sig; -{ -#ifndef MACOS_UNUSE_SIGNAL - extern rb_pid_t getpid _((void)); - - signal(sig, SIG_DFL); - kill(getpid(), sig); -#endif -} - -/* - * call-seq: - * Process.kill(signal, pid, ...) => fixnum - * - * Sends the given signal to the specified process id(s), or to the - * current process if _pid_ is zero. _signal_ may be an - * integer signal number or a POSIX signal name (either with or without - * a +SIG+ prefix). If _signal_ is negative (or starts - * with a minus sign), kills process groups instead of - * processes. Not all signals are available on all platforms. - * - * pid = fork do - * Signal.trap("HUP") { puts "Ouch!"; exit } - * # ... do some work ... - * end - * # ... - * Process.kill("HUP", pid) - * Process.wait - * - * <em>produces:</em> - * - * Ouch! - */ - -VALUE -rb_f_kill(argc, argv) - int argc; - VALUE *argv; -{ - int negative = 0; - int sig; - int i; - char *s; - - rb_secure(2); - if (argc < 2) - rb_raise(rb_eArgError, "wrong number of arguments -- kill(sig, pid...)"); - switch (TYPE(argv[0])) { - case T_FIXNUM: - sig = FIX2INT(argv[0]); - break; - - case T_SYMBOL: - s = rb_id2name(SYM2ID(argv[0])); - if (!s) rb_raise(rb_eArgError, "bad signal"); - goto str_signal; - - case T_STRING: - s = RSTRING(argv[0])->ptr; - if (s[0] == '-') { - negative++; - s++; - } - str_signal: - if (strncmp("SIG", s, 3) == 0) - s += 3; - if((sig = signm2signo(s)) == 0) - rb_raise(rb_eArgError, "unsupported name `SIG%s'", s); - - if (negative) - sig = -sig; - break; - - default: - { - VALUE str; - - str = rb_check_string_type(argv[0]); - if (!NIL_P(str)) { - s = RSTRING(str)->ptr; - goto str_signal; - } - rb_raise(rb_eArgError, "bad signal type %s", - rb_obj_classname(argv[0])); - } - break; - } - - if (sig < 0) { - sig = -sig; - for (i=1; i<argc; i++) { - int pid = NUM2INT(argv[i]); -#ifdef HAS_KILLPG - if (killpg(pid, sig) < 0) -#else - if (kill(-pid, sig) < 0) -#endif - rb_sys_fail(0); - } - } - else { - for (i=1; i<argc; i++) { - Check_Type(argv[i], T_FIXNUM); - if (kill(FIX2INT(argv[i]), sig) < 0) - rb_sys_fail(0); - } - } - return INT2FIX(i-1); -} - -static struct { - VALUE cmd; - int safe; -} trap_list[NSIG]; -static rb_atomic_t trap_pending_list[NSIG]; -static char rb_trap_accept_nativethreads[NSIG]; -rb_atomic_t rb_trap_pending; -rb_atomic_t rb_trap_immediate; -int rb_prohibit_interrupt = 1; - -void -rb_gc_mark_trap_list() -{ -#ifndef MACOS_UNUSE_SIGNAL - int i; - - for (i=0; i<NSIG; i++) { - if (trap_list[i].cmd) - rb_gc_mark(trap_list[i].cmd); - } -#endif /* MACOS_UNUSE_SIGNAL */ -} - -#ifdef __dietlibc__ -#define sighandler_t sh_t -#endif - -typedef RETSIGTYPE (*sighandler_t)_((int)); - -#ifdef POSIX_SIGNAL -static sighandler_t -ruby_signal(signum, handler) - int signum; - sighandler_t handler; -{ - struct sigaction sigact, old; - - rb_trap_accept_nativethreads[signum] = 0; - - sigact.sa_handler = handler; - sigemptyset(&sigact.sa_mask); - sigact.sa_flags = 0; -# ifdef SA_NOCLDWAIT - if (signum == SIGCHLD && handler == SIG_IGN) - sigact.sa_flags |= SA_NOCLDWAIT; -# endif - sigaction(signum, &sigact, &old); - return old.sa_handler; -} - -void -posix_signal(signum, handler) - int signum; - sighandler_t handler; -{ - ruby_signal(signum, handler); -} - -# ifdef HAVE_NATIVETHREAD -static sighandler_t -ruby_nativethread_signal(signum, handler) - int signum; - sighandler_t handler; -{ - sighandler_t old; - - old = ruby_signal(signum, handler); - rb_trap_accept_nativethreads[signum] = 1; - return old; -} - -void -posix_nativethread_signal(signum, handler) - int signum; - sighandler_t handler; -{ - ruby_nativethread_signal(signum, handler); -} -# endif - -#else /* !POSIX_SIGNAL */ -#define ruby_signal(sig,handler) (rb_trap_accept_nativethreads[sig] = 0, signal((sig),(handler))) - -# ifdef HAVE_NATIVETHREAD -static sighandler_t -ruby_nativethread_signal(signum, handler) - int signum; - sighandler_t handler; -{ - sighandler_t old; - - old = signal(signum, handler); - rb_trap_accept_nativethreads[signum] = 1; - return old; -} -# endif -#endif /* POSIX_SIGNAL */ - -static void signal_exec _((int sig)); -static void -signal_exec(sig) - int sig; -{ - if (trap_list[sig].cmd == 0) { - switch (sig) { - case SIGINT: - rb_thread_interrupt(); - break; -#ifdef SIGHUP - case SIGHUP: -#endif -#ifdef SIGQUIT - case SIGQUIT: -#endif -#ifdef SIGTERM - case SIGTERM: -#endif -#ifdef SIGALRM - case SIGALRM: -#endif -#ifdef SIGUSR1 - case SIGUSR1: -#endif -#ifdef SIGUSR2 - case SIGUSR2: -#endif - rb_thread_signal_raise(sig); - break; - } - } - else if (trap_list[sig].cmd == Qundef) { - rb_thread_signal_exit(); - } - else { - rb_thread_trap_eval(trap_list[sig].cmd, sig, trap_list[sig].safe); - } -} - -#if defined(HAVE_NATIVETHREAD) && defined(HAVE_NATIVETHREAD_KILL) -static void -sigsend_to_ruby_thread(int sig) -{ -# ifdef HAVE_SIGPROCMASK - sigset_t mask, old_mask; -# else - int mask, old_mask; -# endif - -# ifdef HAVE_SIGPROCMASK - sigfillset(&mask); - sigprocmask(SIG_BLOCK, &mask, &old_mask); -# else - mask = sigblock(~0); - sigsetmask(mask); -# endif - - ruby_native_thread_kill(sig); -} -#endif - -static RETSIGTYPE sighandler _((int)); -static RETSIGTYPE -sighandler(sig) - int sig; -{ -#ifdef _WIN32 -#define IN_MAIN_CONTEXT(f, a) (rb_w32_main_context(a, f) ? (void)0 : f(a)) -#else -#define IN_MAIN_CONTEXT(f, a) f(a) -#endif - - if (sig >= NSIG) { - rb_bug("trap_handler: Bad signal %d", sig); - } - -#if defined(HAVE_NATIVETHREAD) && defined(HAVE_NATIVETHREAD_KILL) - if (!is_ruby_native_thread() && !rb_trap_accept_nativethreads[sig]) { - sigsend_to_ruby_thread(sig); - return; - } -#endif - -#if !defined(BSD_SIGNAL) && !defined(POSIX_SIGNAL) - if (rb_trap_accept_nativethreads[sig]) { - ruby_nativethread_signal(sig, sighandler); - } - else { - ruby_signal(sig, sighandler); - } -#endif - - if (trap_list[sig].cmd == 0 && ATOMIC_TEST(rb_trap_immediate)) { - IN_MAIN_CONTEXT(signal_exec, sig); - ATOMIC_SET(rb_trap_immediate, 1); - } - else { - ATOMIC_INC(rb_trap_pending); - ATOMIC_INC(trap_pending_list[sig]); -#ifdef _WIN32 - rb_w32_interrupted(); -#endif - } -} - -#ifdef SIGBUS -static RETSIGTYPE sigbus _((int)); -static RETSIGTYPE -sigbus(sig) - int sig; -{ -#if defined(HAVE_NATIVETHREAD) && defined(HAVE_NATIVETHREAD_KILL) - if (!is_ruby_native_thread() && !rb_trap_accept_nativethreads[sig]) { - sigsend_to_ruby_thread(sig); - return; - } -#endif - - rb_bug("Bus Error"); -} -#endif - -#ifdef SIGSEGV -static RETSIGTYPE sigsegv _((int)); -static RETSIGTYPE -sigsegv(sig) - int sig; -{ -#if defined(HAVE_NATIVETHREAD) && defined(HAVE_NATIVETHREAD_KILL) - if (!is_ruby_native_thread() && !rb_trap_accept_nativethreads[sig]) { - sigsend_to_ruby_thread(sig); - return; - } -#endif - - rb_bug("Segmentation fault"); -} -#endif - -#ifdef SIGPIPE -static RETSIGTYPE sigpipe _((int)); -static RETSIGTYPE -sigpipe(sig) - int sig; -{ - /* do nothing */ -} -#endif - -void -rb_trap_exit() -{ -#ifndef MACOS_UNUSE_SIGNAL - if (trap_list[0].cmd) { - VALUE trap_exit = trap_list[0].cmd; - - trap_list[0].cmd = 0; - rb_eval_cmd(trap_exit, rb_ary_new3(1, INT2FIX(0)), trap_list[0].safe); - } -#endif -} - -void -rb_trap_exec() -{ -#ifndef MACOS_UNUSE_SIGNAL - int i; - - for (i=0; i<NSIG; i++) { - if (trap_pending_list[i]) { - trap_pending_list[i] = 0; - signal_exec(i); - } - } -#endif /* MACOS_UNUSE_SIGNAL */ - rb_trap_pending = 0; -} - -struct trap_arg { -#if USE_TRAP_MASK -# ifdef HAVE_SIGPROCMASK - sigset_t mask; -# else - int mask; -# endif -#endif - VALUE sig, cmd; -}; - -# ifdef HAVE_SIGPROCMASK -static sigset_t trap_last_mask; -# else -static int trap_last_mask; -# endif - -static RETSIGTYPE sigexit _((int)); -static RETSIGTYPE -sigexit(sig) - int sig; -{ - rb_thread_signal_exit(); -} - -static VALUE -trap(arg) - struct trap_arg *arg; -{ - sighandler_t func, oldfunc; - VALUE command, oldcmd; - int sig = -1; - char *s; - - func = sighandler; - command = arg->cmd; - if (NIL_P(command)) { - func = SIG_IGN; - } - else if (TYPE(command) == T_STRING) { - SafeStringValue(command); /* taint check */ - if (RSTRING(command)->len == 0) { - func = SIG_IGN; - } - else if (RSTRING(command)->len == 7) { - if (strncmp(RSTRING(command)->ptr, "SIG_IGN", 7) == 0) { - func = SIG_IGN; - } - else if (strncmp(RSTRING(command)->ptr, "SIG_DFL", 7) == 0) { - func = SIG_DFL; - } - else if (strncmp(RSTRING(command)->ptr, "DEFAULT", 7) == 0) { - func = SIG_DFL; - } - } - else if (RSTRING(command)->len == 6) { - if (strncmp(RSTRING(command)->ptr, "IGNORE", 6) == 0) { - func = SIG_IGN; - } - } - else if (RSTRING(command)->len == 4) { - if (strncmp(RSTRING(command)->ptr, "EXIT", 4) == 0) { - func = sigexit; - } - } - } - if (func == SIG_IGN || func == SIG_DFL) { - command = 0; - } - - switch (TYPE(arg->sig)) { - case T_FIXNUM: - sig = FIX2INT(arg->sig); - break; - - case T_SYMBOL: - s = rb_id2name(SYM2ID(arg->sig)); - if (!s) rb_raise(rb_eArgError, "bad signal"); - goto str_signal; - - case T_STRING: - s = RSTRING(arg->sig)->ptr; - - str_signal: - if (strncmp("SIG", s, 3) == 0) - s += 3; - sig = signm2signo(s); - if (sig == 0 && strcmp(s, "EXIT") != 0) - rb_raise(rb_eArgError, "unsupported signal SIG%s", s); - } - - if (sig < 0 || sig >= NSIG) { - rb_raise(rb_eArgError, "invalid signal number (%d)", sig); - } -#if defined(HAVE_SETITIMER) - if (sig == SIGVTALRM) { - rb_raise(rb_eArgError, "SIGVTALRM reserved for Thread; can't set handler"); - } -#endif - if (func == SIG_DFL) { - switch (sig) { - case SIGINT: -#ifdef SIGHUP - case SIGHUP: -#endif -#ifdef SIGQUIT - case SIGQUIT: -#endif -#ifdef SIGTERM - case SIGTERM: -#endif -#ifdef SIGALRM - case SIGALRM: -#endif -#ifdef SIGUSR1 - case SIGUSR1: -#endif -#ifdef SIGUSR2 - case SIGUSR2: -#endif - func = sighandler; - break; -#ifdef SIGBUS - case SIGBUS: - func = sigbus; - break; -#endif -#ifdef SIGSEGV - case SIGSEGV: - func = sigsegv; - break; -#endif -#ifdef SIGPIPE - case SIGPIPE: - func = sigpipe; - break; -#endif - } - } - oldfunc = ruby_signal(sig, func); - oldcmd = trap_list[sig].cmd; - if (!oldcmd) { - if (oldfunc == SIG_IGN) oldcmd = rb_str_new2("IGNORE"); - else if (oldfunc == sighandler) oldcmd = rb_str_new2("DEFAULT"); - else oldcmd = Qnil; - } - - trap_list[sig].cmd = command; - trap_list[sig].safe = ruby_safe_level; - /* enable at least specified signal. */ -#if USE_TRAP_MASK -#ifdef HAVE_SIGPROCMASK - sigdelset(&arg->mask, sig); -#else - arg->mask &= ~sigmask(sig); -#endif -#endif - return oldcmd; -} - -#if USE_TRAP_MASK -static VALUE -trap_ensure(arg) - struct trap_arg *arg; -{ - /* enable interrupt */ -#ifdef HAVE_SIGPROCMASK - sigprocmask(SIG_SETMASK, &arg->mask, NULL); -#else - sigsetmask(arg->mask); -#endif - trap_last_mask = arg->mask; - return 0; -} -#endif - -void -rb_trap_restore_mask() -{ -#if USE_TRAP_MASK -# ifdef HAVE_SIGPROCMASK - sigprocmask(SIG_SETMASK, &trap_last_mask, NULL); -# else - sigsetmask(trap_last_mask); -# endif -#endif -} - -/* - * call-seq: - * Signal.trap( signal, proc ) => obj - * Signal.trap( signal ) {| | block } => obj - * - * Specifies the handling of signals. The first parameter is a signal - * name (a string such as ``SIGALRM'', ``SIGUSR1'', and so on) or a - * signal number. The characters ``SIG'' may be omitted from the - * signal name. The command or block specifies code to be run when the - * signal is raised. If the command is the string ``IGNORE'' or - * ``SIG_IGN'', the signal will be ignored. If the command is - * ``DEFAULT'' or ``SIG_DFL'', the operating system's default handler - * will be invoked. If the command is ``EXIT'', the script will be - * terminated by the signal. Otherwise, the given command or block - * will be run. - * The special signal name ``EXIT'' or signal number zero will be - * invoked just prior to program termination. - * trap returns the previous handler for the given signal. - * - * Signal.trap(0, proc { puts "Terminating: #{$$}" }) - * Signal.trap("CLD") { puts "Child died" } - * fork && Process.wait - * - * produces: - * Terminating: 27461 - * Child died - * Terminating: 27460 - */ -static VALUE -sig_trap(argc, argv) - int argc; - VALUE *argv; -{ - struct trap_arg arg; - - rb_secure(2); - if (argc == 0 || argc > 2) { - rb_raise(rb_eArgError, "wrong number of arguments -- trap(sig, cmd)/trap(sig){...}"); - } - - arg.sig = argv[0]; - if (argc == 1) { - arg.cmd = rb_block_proc(); - } - else if (argc == 2) { - arg.cmd = argv[1]; - } - - if (OBJ_TAINTED(arg.cmd)) { - rb_raise(rb_eSecurityError, "Insecure: tainted signal trap"); - } -#if USE_TRAP_MASK - /* disable interrupt */ -# ifdef HAVE_SIGPROCMASK - sigfillset(&arg.mask); - sigprocmask(SIG_BLOCK, &arg.mask, &arg.mask); -# else - arg.mask = sigblock(~0); -# endif - - return rb_ensure(trap, (VALUE)&arg, trap_ensure, (VALUE)&arg); -#else - return trap(&arg); -#endif -} - -/* - * call-seq: - * Signal.list => a_hash - * - * Returns a list of signal names mapped to the corresponding - * underlying signal numbers. - * - * Signal.list #=> {"ABRT"=>6, "ALRM"=>14, "BUS"=>7, "CHLD"=>17, "CLD"=>17, "CONT"=>18, "FPE"=>8, "HUP"=>1, "ILL"=>4, "INT"=>2, "IO"=>29, "IOT"=>6, "KILL"=>9, "PIPE"=>13, "POLL"=>29, "PROF"=>27, "PWR"=>30, "QUIT"=>3, "SEGV"=>11, "STOP"=>19, "SYS"=>31, "TERM"=>15, "TRAP"=>5, "TSTP"=>20, "TTIN"=>21, "TTOU"=>22, "URG"=>23, "USR1"=>10, "USR2"=>12, "VTALRM"=>26, "WINCH"=>28, "XCPU"=>24, "XFSZ"=>25} - */ -static VALUE -sig_list() -{ - VALUE h = rb_hash_new(); - struct signals *sigs; - - for (sigs = siglist; sigs->signm; sigs++) { - rb_hash_aset(h, rb_str_new2(sigs->signm), INT2FIX(sigs->signo)); - } - return h; -} - -static void -install_sighandler(signum, handler) - int signum; - sighandler_t handler; -{ - sighandler_t old; - - old = ruby_signal(signum, handler); - if (old != SIG_DFL) { - ruby_signal(signum, old); - } -} - -#if 0 -/* - * If you write a handler which works on any native thread - * (even if the thread is NOT a ruby's one), please enable - * this function and use it to install the handler, instead - * of `install_sighandler()'. - */ -#ifdef HAVE_NATIVETHREAD -static void -install_nativethread_sighandler(signum, handler) - int signum; - sighandler_t handler; -{ - sighandler_t old; - int old_st; - - old_st = rb_trap_accept_nativethreads[signum]; - old = ruby_nativethread_signal(signum, handler); - if (old != SIG_DFL) { - if (old_st) { - ruby_nativethread_signal(signum, old); - } else { - ruby_signal(signum, old); - } - } -} -#endif -#endif - -static void -init_sigchld(sig) - int sig; -{ - sighandler_t oldfunc; -#if USE_TRAP_MASK -# ifdef HAVE_SIGPROCMASK - sigset_t mask; -# else - int mask; -# endif -#endif - -#if USE_TRAP_MASK - /* disable interrupt */ -# ifdef HAVE_SIGPROCMASK - sigfillset(&mask); - sigprocmask(SIG_BLOCK, &mask, &mask); -# else - mask = sigblock(~0); -# endif -#endif - - oldfunc = ruby_signal(sig, SIG_DFL); - if (oldfunc != SIG_DFL && oldfunc != SIG_IGN) { - ruby_signal(sig, oldfunc); - } else { - trap_list[sig].cmd = 0; - } - -#if USE_TRAP_MASK -#ifdef HAVE_SIGPROCMASK - sigdelset(&mask, sig); - sigprocmask(SIG_SETMASK, &mask, NULL); -#else - mask &= ~sigmask(sig); - sigsetmask(mask); -#endif - trap_last_mask = mask; -#endif -} - -/* - * Many operating systems allow signals to be sent to running - * processes. Some signals have a defined effect on the process, while - * others may be trapped at the code level and acted upon. For - * example, your process may trap the USR1 signal and use it to toggle - * debugging, and may use TERM to initiate a controlled shutdown. - * - * pid = fork do - * Signal.trap("USR1") do - * $debug = !$debug - * puts "Debug now: #$debug" - * end - * Signal.trap("TERM") do - * puts "Terminating..." - * shutdown() - * end - * # . . . do some work . . . - * end - * - * Process.detach(pid) - * - * # Controlling program: - * Process.kill("USR1", pid) - * # ... - * Process.kill("USR1", pid) - * # ... - * Process.kill("TERM", pid) - * - * produces: - * Debug now: true - * Debug now: false - * Terminating... - * - * The list of available signal names and their interpretation is - * system dependent. Signal delivery semantics may also vary between - * systems; in particular signal delivery may not always be reliable. - */ -void -Init_signal() -{ -#ifndef MACOS_UNUSE_SIGNAL - VALUE mSignal = rb_define_module("Signal"); - - rb_define_global_function("trap", sig_trap, -1); - rb_define_module_function(mSignal, "trap", sig_trap, -1); - rb_define_module_function(mSignal, "list", sig_list, 0); - - rb_define_method(rb_eSignal, "initialize", esignal_init, -1); - rb_attr(rb_eSignal, rb_intern("signo"), 1, 0, 0); - rb_alias(rb_eSignal, rb_intern("signm"), rb_intern("message")); - rb_define_method(rb_eInterrupt, "initialize", interrupt_init, 1); - - install_sighandler(SIGINT, sighandler); -#ifdef SIGHUP - install_sighandler(SIGHUP, sighandler); -#endif -#ifdef SIGQUIT - install_sighandler(SIGQUIT, sighandler); -#endif -#ifdef SIGTERM - install_sighandler(SIGTERM, sighandler); -#endif -#ifdef SIGALRM - install_sighandler(SIGALRM, sighandler); -#endif -#ifdef SIGUSR1 - install_sighandler(SIGUSR1, sighandler); -#endif -#ifdef SIGUSR2 - install_sighandler(SIGUSR2, sighandler); -#endif - -#ifdef SIGBUS - install_sighandler(SIGBUS, sigbus); -#endif -#ifdef SIGSEGV - install_sighandler(SIGSEGV, sigsegv); -#endif -#ifdef SIGPIPE - install_sighandler(SIGPIPE, sigpipe); -#endif - -#if defined(SIGCLD) - init_sigchld(SIGCLD); -#elif defined(SIGCHLD) - init_sigchld(SIGCHLD); -#endif - -#endif /* MACOS_UNUSE_SIGNAL */ -} |