Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 1 | |
Guido van Rossum | 3bbc62e | 1995-01-02 19:30:30 +0000 | [diff] [blame] | 2 | /* Signal module -- many thanks to Lance Ellinghaus */ |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 3 | |
Guido van Rossum | 644a12b | 1997-04-09 19:24:53 +0000 | [diff] [blame] | 4 | /* XXX Signals should be recorded per thread, now we have thread state. */ |
| 5 | |
Guido van Rossum | 602099a | 1994-09-14 13:32:22 +0000 | [diff] [blame] | 6 | #include "Python.h" |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 7 | #include "intrcheck.h" |
| 8 | |
Guido van Rossum | 644a12b | 1997-04-09 19:24:53 +0000 | [diff] [blame] | 9 | #ifdef MS_WIN32 |
| 10 | #include <process.h> |
| 11 | #endif |
| 12 | |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 13 | #include <signal.h> |
| 14 | |
Guido van Rossum | bb4ba12 | 1994-06-23 11:25:45 +0000 | [diff] [blame] | 15 | #ifndef SIG_ERR |
Guido van Rossum | d2cd7ad | 2000-09-16 16:35:28 +0000 | [diff] [blame] | 16 | #define SIG_ERR ((PyOS_sighandler_t)(-1)) |
Guido van Rossum | bb4ba12 | 1994-06-23 11:25:45 +0000 | [diff] [blame] | 17 | #endif |
| 18 | |
Andrew MacIntyre | 7bf6833 | 2002-03-03 02:59:16 +0000 | [diff] [blame] | 19 | #if defined(PYOS_OS2) && !defined(PYCC_GCC) |
Guido van Rossum | 8e9ebfd | 1997-11-22 21:53:48 +0000 | [diff] [blame] | 20 | #define NSIG 12 |
| 21 | #include <process.h> |
| 22 | #endif |
| 23 | |
Guido van Rossum | 3bbc62e | 1995-01-02 19:30:30 +0000 | [diff] [blame] | 24 | #ifndef NSIG |
Marc-André Lemburg | 8bcfb8a | 2000-07-04 14:17:33 +0000 | [diff] [blame] | 25 | # if defined(_NSIG) |
| 26 | # define NSIG _NSIG /* For BSD/SysV */ |
| 27 | # elif defined(_SIGMAX) |
| 28 | # define NSIG (_SIGMAX + 1) /* For QNX */ |
| 29 | # elif defined(SIGMAX) |
| 30 | # define NSIG (SIGMAX + 1) /* For djgpp */ |
| 31 | # else |
| 32 | # define NSIG 64 /* Use a reasonable default value */ |
| 33 | # endif |
Guido van Rossum | 3bbc62e | 1995-01-02 19:30:30 +0000 | [diff] [blame] | 34 | #endif |
| 35 | |
| 36 | |
Guido van Rossum | bb4ba12 | 1994-06-23 11:25:45 +0000 | [diff] [blame] | 37 | /* |
| 38 | NOTES ON THE INTERACTION BETWEEN SIGNALS AND THREADS |
| 39 | |
| 40 | When threads are supported, we want the following semantics: |
| 41 | |
| 42 | - only the main thread can set a signal handler |
| 43 | - any thread can get a signal handler |
| 44 | - signals are only delivered to the main thread |
| 45 | |
| 46 | I.e. we don't support "synchronous signals" like SIGFPE (catching |
| 47 | this doesn't make much sense in Python anyway) nor do we support |
| 48 | signals as a means of inter-thread communication, since not all |
| 49 | thread implementations support that (at least our thread library |
| 50 | doesn't). |
| 51 | |
| 52 | We still have the problem that in some implementations signals |
| 53 | generated by the keyboard (e.g. SIGINT) are delivered to all |
| 54 | threads (e.g. SGI), while in others (e.g. Solaris) such signals are |
| 55 | delivered to one random thread (an intermediate possibility would |
Guido van Rossum | a3c04b0 | 1995-01-12 11:29:01 +0000 | [diff] [blame] | 56 | be to deliver it to the main thread -- POSIX?). For now, we have |
Guido van Rossum | bb4ba12 | 1994-06-23 11:25:45 +0000 | [diff] [blame] | 57 | a working implementation that works in all three cases -- the |
| 58 | handler ignores signals if getpid() isn't the same as in the main |
| 59 | thread. XXX This is a hack. |
| 60 | |
Guido van Rossum | 9e8181b | 2000-09-19 00:46:46 +0000 | [diff] [blame] | 61 | GNU pth is a user-space threading library, and as such, all threads |
| 62 | run within the same process. In this case, if the currently running |
| 63 | thread is not the main_thread, send the signal to the main_thread. |
Guido van Rossum | bb4ba12 | 1994-06-23 11:25:45 +0000 | [diff] [blame] | 64 | */ |
| 65 | |
| 66 | #ifdef WITH_THREAD |
Guido van Rossum | 295b8e5 | 1997-06-06 21:16:41 +0000 | [diff] [blame] | 67 | #include <sys/types.h> /* For pid_t */ |
Guido van Rossum | 49b5606 | 1998-10-01 20:42:43 +0000 | [diff] [blame] | 68 | #include "pythread.h" |
Guido van Rossum | bb4ba12 | 1994-06-23 11:25:45 +0000 | [diff] [blame] | 69 | static long main_thread; |
| 70 | static pid_t main_pid; |
| 71 | #endif |
| 72 | |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 73 | static struct { |
| 74 | int tripped; |
| 75 | PyObject *func; |
| 76 | } Handlers[NSIG]; |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 77 | |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 78 | static int is_tripped = 0; /* Speed up sigcheck() when none tripped */ |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 79 | |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 80 | static PyObject *DefaultHandler; |
| 81 | static PyObject *IgnoreHandler; |
| 82 | static PyObject *IntHandler; |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 83 | |
Martin v. Löwis | f58de1b | 2001-03-06 12:13:56 +0000 | [diff] [blame] | 84 | /* On Solaris 8, gcc will produce a warning that the function |
| 85 | declaration is not a prototype. This is caused by the definition of |
| 86 | SIG_DFL as (void (*)())0; the correct declaration would have been |
| 87 | (void (*)(int))0. */ |
| 88 | |
Guido van Rossum | d2cd7ad | 2000-09-16 16:35:28 +0000 | [diff] [blame] | 89 | static PyOS_sighandler_t old_siginthandler = SIG_DFL; |
Guido van Rossum | 08c1661 | 1997-08-02 03:01:42 +0000 | [diff] [blame] | 90 | |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 91 | |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 92 | static PyObject * |
Peter Schneider-Kamp | e89b156 | 2000-07-10 12:04:18 +0000 | [diff] [blame] | 93 | signal_default_int_handler(PyObject *self, PyObject *args) |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 94 | { |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 95 | PyErr_SetNone(PyExc_KeyboardInterrupt); |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 96 | return NULL; |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 97 | } |
| 98 | |
Guido van Rossum | 1d8fb2d | 1998-06-28 16:54:49 +0000 | [diff] [blame] | 99 | static char default_int_handler_doc[] = |
| 100 | "default_int_handler(...)\n\ |
| 101 | \n\ |
| 102 | The default handler for SIGINT instated by Python.\n\ |
| 103 | It raises KeyboardInterrupt."; |
| 104 | |
Thomas Wouters | 0796b00 | 2000-07-22 23:49:30 +0000 | [diff] [blame] | 105 | |
| 106 | static int |
| 107 | checksignals_witharg(void * unused) |
| 108 | { |
| 109 | return PyErr_CheckSignals(); |
| 110 | } |
| 111 | |
Tim Peters | 4f1b208 | 2000-07-23 21:18:09 +0000 | [diff] [blame] | 112 | static void |
Peter Schneider-Kamp | e89b156 | 2000-07-10 12:04:18 +0000 | [diff] [blame] | 113 | signal_handler(int sig_num) |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 114 | { |
Guido van Rossum | bb4ba12 | 1994-06-23 11:25:45 +0000 | [diff] [blame] | 115 | #ifdef WITH_THREAD |
Guido van Rossum | 9e8181b | 2000-09-19 00:46:46 +0000 | [diff] [blame] | 116 | #ifdef WITH_PTH |
| 117 | if (PyThread_get_thread_ident() != main_thread) { |
| 118 | pth_raise(*(pth_t *) main_thread, sig_num); |
| 119 | return; |
| 120 | } |
| 121 | #endif |
Guido van Rossum | bb4ba12 | 1994-06-23 11:25:45 +0000 | [diff] [blame] | 122 | /* See NOTES section above */ |
| 123 | if (getpid() == main_pid) { |
| 124 | #endif |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 125 | is_tripped++; |
| 126 | Handlers[sig_num].tripped = 1; |
Thomas Wouters | 0796b00 | 2000-07-22 23:49:30 +0000 | [diff] [blame] | 127 | Py_AddPendingCall(checksignals_witharg, NULL); |
Guido van Rossum | bb4ba12 | 1994-06-23 11:25:45 +0000 | [diff] [blame] | 128 | #ifdef WITH_THREAD |
| 129 | } |
| 130 | #endif |
Guido van Rossum | 602099a | 1994-09-14 13:32:22 +0000 | [diff] [blame] | 131 | #ifdef SIGCHLD |
| 132 | if (sig_num == SIGCHLD) { |
| 133 | /* To avoid infinite recursion, this signal remains |
| 134 | reset until explicit re-instated. |
| 135 | Don't clear the 'func' field as it is our pointer |
| 136 | to the Python handler... */ |
Tim Peters | 4f1b208 | 2000-07-23 21:18:09 +0000 | [diff] [blame] | 137 | return; |
Guido van Rossum | 602099a | 1994-09-14 13:32:22 +0000 | [diff] [blame] | 138 | } |
| 139 | #endif |
Guido van Rossum | 1b23676 | 1998-09-21 14:46:00 +0000 | [diff] [blame] | 140 | #ifdef HAVE_SIGINTERRUPT |
| 141 | siginterrupt(sig_num, 1); |
| 142 | #endif |
Guido van Rossum | d2cd7ad | 2000-09-16 16:35:28 +0000 | [diff] [blame] | 143 | PyOS_setsig(sig_num, signal_handler); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 144 | } |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 145 | |
Guido van Rossum | 06d511d | 1995-03-10 15:13:48 +0000 | [diff] [blame] | 146 | |
Guido van Rossum | 1171ee6 | 1997-08-22 20:42:00 +0000 | [diff] [blame] | 147 | #ifdef HAVE_ALARM |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 148 | static PyObject * |
Peter Schneider-Kamp | e89b156 | 2000-07-10 12:04:18 +0000 | [diff] [blame] | 149 | signal_alarm(PyObject *self, PyObject *args) |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 150 | { |
| 151 | int t; |
Neal Norwitz | ba3a16c | 2002-03-31 15:27:00 +0000 | [diff] [blame] | 152 | if (!PyArg_ParseTuple(args, "i:alarm", &t)) |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 153 | return NULL; |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 154 | /* alarm() returns the number of seconds remaining */ |
Fred Drake | dff3a37 | 2001-07-19 21:29:49 +0000 | [diff] [blame] | 155 | return PyInt_FromLong((long)alarm(t)); |
Guido van Rossum | aa0f4c7 | 1994-08-23 13:49:37 +0000 | [diff] [blame] | 156 | } |
Guido van Rossum | 1d8fb2d | 1998-06-28 16:54:49 +0000 | [diff] [blame] | 157 | |
| 158 | static char alarm_doc[] = |
| 159 | "alarm(seconds)\n\ |
| 160 | \n\ |
Guido van Rossum | 911ec18 | 1998-06-28 17:00:19 +0000 | [diff] [blame] | 161 | Arrange for SIGALRM to arrive after the given number of seconds."; |
Guido van Rossum | 06d511d | 1995-03-10 15:13:48 +0000 | [diff] [blame] | 162 | #endif |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 163 | |
Guido van Rossum | 1171ee6 | 1997-08-22 20:42:00 +0000 | [diff] [blame] | 164 | #ifdef HAVE_PAUSE |
Guido van Rossum | a597dde | 1995-01-10 20:56:29 +0000 | [diff] [blame] | 165 | static PyObject * |
Neal Norwitz | 3a6f978 | 2002-03-25 20:46:46 +0000 | [diff] [blame] | 166 | signal_pause(PyObject *self) |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 167 | { |
Guido van Rossum | a597dde | 1995-01-10 20:56:29 +0000 | [diff] [blame] | 168 | Py_BEGIN_ALLOW_THREADS |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 169 | (void)pause(); |
Guido van Rossum | a597dde | 1995-01-10 20:56:29 +0000 | [diff] [blame] | 170 | Py_END_ALLOW_THREADS |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 171 | /* make sure that any exceptions that got raised are propagated |
| 172 | * back into Python |
| 173 | */ |
| 174 | if (PyErr_CheckSignals()) |
| 175 | return NULL; |
| 176 | |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 177 | Py_INCREF(Py_None); |
| 178 | return Py_None; |
| 179 | } |
Guido van Rossum | 1d8fb2d | 1998-06-28 16:54:49 +0000 | [diff] [blame] | 180 | static char pause_doc[] = |
Barry Warsaw | 1ee36ff | 1998-07-21 22:41:18 +0000 | [diff] [blame] | 181 | "pause()\n\ |
| 182 | \n\ |
Guido van Rossum | 1d8fb2d | 1998-06-28 16:54:49 +0000 | [diff] [blame] | 183 | Wait until a signal arrives."; |
| 184 | |
Guido van Rossum | 06d511d | 1995-03-10 15:13:48 +0000 | [diff] [blame] | 185 | #endif |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 186 | |
Guido van Rossum | d2cd7ad | 2000-09-16 16:35:28 +0000 | [diff] [blame] | 187 | |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 188 | static PyObject * |
Peter Schneider-Kamp | e89b156 | 2000-07-10 12:04:18 +0000 | [diff] [blame] | 189 | signal_signal(PyObject *self, PyObject *args) |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 190 | { |
| 191 | PyObject *obj; |
| 192 | int sig_num; |
| 193 | PyObject *old_handler; |
Tim Peters | 4f1b208 | 2000-07-23 21:18:09 +0000 | [diff] [blame] | 194 | void (*func)(int); |
Neal Norwitz | ba3a16c | 2002-03-31 15:27:00 +0000 | [diff] [blame] | 195 | if (!PyArg_ParseTuple(args, "iO:signal", &sig_num, &obj)) |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 196 | return NULL; |
Guido van Rossum | bb4ba12 | 1994-06-23 11:25:45 +0000 | [diff] [blame] | 197 | #ifdef WITH_THREAD |
Guido van Rossum | 65d5b57 | 1998-12-21 19:32:43 +0000 | [diff] [blame] | 198 | if (PyThread_get_thread_ident() != main_thread) { |
Guido van Rossum | f4b012a | 1995-03-16 15:43:29 +0000 | [diff] [blame] | 199 | PyErr_SetString(PyExc_ValueError, |
| 200 | "signal only works in main thread"); |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 201 | return NULL; |
Guido van Rossum | bb4ba12 | 1994-06-23 11:25:45 +0000 | [diff] [blame] | 202 | } |
| 203 | #endif |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 204 | if (sig_num < 1 || sig_num >= NSIG) { |
Guido van Rossum | f4b012a | 1995-03-16 15:43:29 +0000 | [diff] [blame] | 205 | PyErr_SetString(PyExc_ValueError, |
| 206 | "signal number out of range"); |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 207 | return NULL; |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 208 | } |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 209 | if (obj == IgnoreHandler) |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 210 | func = SIG_IGN; |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 211 | else if (obj == DefaultHandler) |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 212 | func = SIG_DFL; |
Guido van Rossum | f4b012a | 1995-03-16 15:43:29 +0000 | [diff] [blame] | 213 | else if (!PyCallable_Check(obj)) { |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 214 | PyErr_SetString(PyExc_TypeError, |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 215 | "signal handler must be signal.SIG_IGN, signal.SIG_DFL, or a callable object"); |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 216 | return NULL; |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 217 | } |
| 218 | else |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 219 | func = signal_handler; |
Guido van Rossum | 1b23676 | 1998-09-21 14:46:00 +0000 | [diff] [blame] | 220 | #ifdef HAVE_SIGINTERRUPT |
| 221 | siginterrupt(sig_num, 1); |
| 222 | #endif |
Guido van Rossum | d2cd7ad | 2000-09-16 16:35:28 +0000 | [diff] [blame] | 223 | if (PyOS_setsig(sig_num, func) == SIG_ERR) { |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 224 | PyErr_SetFromErrno(PyExc_RuntimeError); |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 225 | return NULL; |
Guido van Rossum | bb4ba12 | 1994-06-23 11:25:45 +0000 | [diff] [blame] | 226 | } |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 227 | old_handler = Handlers[sig_num].func; |
| 228 | Handlers[sig_num].tripped = 0; |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 229 | Py_INCREF(obj); |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 230 | Handlers[sig_num].func = obj; |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 231 | return old_handler; |
| 232 | } |
| 233 | |
Guido van Rossum | 1d8fb2d | 1998-06-28 16:54:49 +0000 | [diff] [blame] | 234 | static char signal_doc[] = |
| 235 | "signal(sig, action) -> action\n\ |
| 236 | \n\ |
| 237 | Set the action for the given signal. The action can be SIG_DFL,\n\ |
| 238 | SIG_IGN, or a callable Python object. The previous action is\n\ |
| 239 | returned. See getsignal() for possible return values.\n\ |
| 240 | \n\ |
| 241 | *** IMPORTANT NOTICE ***\n\ |
| 242 | A signal handler function is called with two arguments:\n\ |
| 243 | the first is the signal number, the second is the interrupted stack frame."; |
| 244 | |
Guido van Rossum | d2cd7ad | 2000-09-16 16:35:28 +0000 | [diff] [blame] | 245 | |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 246 | static PyObject * |
Peter Schneider-Kamp | e89b156 | 2000-07-10 12:04:18 +0000 | [diff] [blame] | 247 | signal_getsignal(PyObject *self, PyObject *args) |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 248 | { |
| 249 | int sig_num; |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 250 | PyObject *old_handler; |
Neal Norwitz | ba3a16c | 2002-03-31 15:27:00 +0000 | [diff] [blame] | 251 | if (!PyArg_ParseTuple(args, "i:getsignal", &sig_num)) |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 252 | return NULL; |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 253 | if (sig_num < 1 || sig_num >= NSIG) { |
Guido van Rossum | f4b012a | 1995-03-16 15:43:29 +0000 | [diff] [blame] | 254 | PyErr_SetString(PyExc_ValueError, |
| 255 | "signal number out of range"); |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 256 | return NULL; |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 257 | } |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 258 | old_handler = Handlers[sig_num].func; |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 259 | Py_INCREF(old_handler); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 260 | return old_handler; |
| 261 | } |
| 262 | |
Guido van Rossum | 1d8fb2d | 1998-06-28 16:54:49 +0000 | [diff] [blame] | 263 | static char getsignal_doc[] = |
| 264 | "getsignal(sig) -> action\n\ |
| 265 | \n\ |
| 266 | Return the current action for the given signal. The return value can be:\n\ |
| 267 | SIG_IGN -- if the signal is being ignored\n\ |
| 268 | SIG_DFL -- if the default action for the signal is in effect\n\ |
| 269 | None -- if an unknown handler is in effect\n\ |
| 270 | anything else -- the callable Python object used as a handler\n\ |
| 271 | "; |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 272 | |
Michael W. Hudson | 34f20ea | 2002-05-27 15:08:24 +0000 | [diff] [blame^] | 273 | #ifdef HAVE_SIGPROCMASK /* we assume that having SIGPROCMASK is enough |
| 274 | to guarantee full POSIX signal handling */ |
| 275 | /* returns 0 for success, <0 for failure (with exception set) */ |
| 276 | static int |
| 277 | _signal_list_to_sigset(PyObject* seq, sigset_t* set, char* mesg) |
| 278 | { |
| 279 | int i, len, val; |
| 280 | |
| 281 | seq = PySequence_Fast(seq, mesg); |
| 282 | if (!seq) |
| 283 | return -1; |
| 284 | |
| 285 | len = PySequence_Fast_GET_SIZE(seq); |
| 286 | |
| 287 | sigemptyset(set); |
| 288 | |
| 289 | for (i = 0; i < len; i++) { |
| 290 | val = PyInt_AsLong(PySequence_Fast_GET_ITEM(seq, i)); |
| 291 | if (val == -1 && PyErr_Occurred()) { |
| 292 | Py_DECREF(seq); |
| 293 | return -1; |
| 294 | } |
| 295 | if (sigaddset(set, val) < 0) { |
| 296 | Py_DECREF(seq); |
| 297 | PyErr_SetFromErrno(PyExc_ValueError); |
| 298 | return -1; |
| 299 | } |
| 300 | } |
| 301 | |
| 302 | Py_DECREF(seq); |
| 303 | return 0; |
| 304 | } |
| 305 | |
| 306 | static PyObject* |
| 307 | _signal_sigset_to_list(sigset_t* set) |
| 308 | { |
| 309 | PyObject* ret; |
| 310 | PyObject* ob; |
| 311 | int i; |
| 312 | |
| 313 | ret = PyList_New(0); |
| 314 | if (!ret) |
| 315 | return NULL; |
| 316 | |
| 317 | for (i = 1; i < NSIG; i++) { |
| 318 | if (sigismember(set, i)) { |
| 319 | ob = PyInt_FromLong(i); |
| 320 | if (!ob) { |
| 321 | Py_DECREF(ret); |
| 322 | return NULL; |
| 323 | } |
| 324 | PyList_Append(ret, ob); |
| 325 | Py_DECREF(ob); |
| 326 | } |
| 327 | } |
| 328 | |
| 329 | return ret; |
| 330 | } |
| 331 | |
| 332 | static PyObject* |
| 333 | signal_sigprocmask(PyObject* self, PyObject* args) |
| 334 | { |
| 335 | int how; |
| 336 | sigset_t newset, oldset; |
| 337 | PyObject* seq; |
| 338 | |
| 339 | if (!PyArg_ParseTuple(args, "iO", &how, &seq)) |
| 340 | return NULL; |
| 341 | |
| 342 | if (_signal_list_to_sigset(seq, &newset, |
| 343 | "sigprocmask requires a sequence") < 0) |
| 344 | return NULL; |
| 345 | |
| 346 | if (sigprocmask(how, &newset, &oldset) < 0) { |
| 347 | return PyErr_SetFromErrno(PyExc_ValueError); |
| 348 | } |
| 349 | |
| 350 | if (PyErr_CheckSignals()) |
| 351 | return NULL; |
| 352 | |
| 353 | return _signal_sigset_to_list(&oldset); |
| 354 | } |
| 355 | |
| 356 | static char sigprocmask_doc[] = |
| 357 | "sigprocmask(how, sigset) -> sigset\n\ |
| 358 | \n\ |
| 359 | Change the list of currently blocked signals. The parameter how should be\n\ |
| 360 | one of SIG_BLOCK, SIG_UNBLOCK or SIG_SETMASK and sigset should be a\n\ |
| 361 | sequence of signal numbers. The behaviour of the call depends on the value\n\ |
| 362 | of how:\n\ |
| 363 | \n\ |
| 364 | SIG_BLOCK\n\ |
| 365 | The set of blocked signals is the union of the current set and the\n\ |
| 366 | sigset argument.\n\ |
| 367 | SIG_UNBLOCK\n\ |
| 368 | The signals in sigset are removed from the current set of blocked\n\ |
| 369 | signals. It is legal to attempt to unblock a signal which is not\n\ |
| 370 | blocked.\n\ |
| 371 | SIG_SETMASK\n\ |
| 372 | The set of blocked signals is set to the argument set.\n\ |
| 373 | \n\ |
| 374 | A list contating the numbers of the previously blocked signals is returned."; |
| 375 | |
| 376 | static PyObject* |
| 377 | signal_sigpending(PyObject* self) |
| 378 | { |
| 379 | sigset_t set; |
| 380 | |
| 381 | if (sigpending(&set) < 0) { |
| 382 | return PyErr_SetFromErrno(PyExc_ValueError); |
| 383 | } |
| 384 | |
| 385 | return _signal_sigset_to_list(&set); |
| 386 | } |
| 387 | |
| 388 | static char sigpending_doc[] = |
| 389 | "sigpending() -> sigset\n\ |
| 390 | \n\ |
| 391 | Return the set of pending signals, i.e. a list containing the numbers of\n\ |
| 392 | those signals that have been raised while blocked."; |
| 393 | |
| 394 | static PyObject* |
| 395 | signal_sigsuspend(PyObject* self, PyObject* arg) |
| 396 | { |
| 397 | sigset_t set; |
| 398 | |
| 399 | if (_signal_list_to_sigset(arg, &set, |
| 400 | "sigsuspend requires a sequence") < 0) |
| 401 | return NULL; |
| 402 | |
| 403 | Py_BEGIN_ALLOW_THREADS |
| 404 | sigsuspend(&set); |
| 405 | Py_END_ALLOW_THREADS |
| 406 | |
| 407 | if (PyErr_CheckSignals()) |
| 408 | return NULL; |
| 409 | |
| 410 | Py_INCREF(Py_None); |
| 411 | return Py_None; |
| 412 | } |
| 413 | |
| 414 | static char sigsuspend_doc[] = |
| 415 | "sigsuspend(sigset) -> None\n\ |
| 416 | \n\ |
| 417 | Temporarily replace the signal mask with sigset (which should be a sequence\n\ |
| 418 | of signal numbers) and suspend the process until a signal is received."; |
| 419 | #endif |
Guido van Rossum | d2cd7ad | 2000-09-16 16:35:28 +0000 | [diff] [blame] | 420 | |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 421 | /* List of functions defined in the module */ |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 422 | static PyMethodDef signal_methods[] = { |
Guido van Rossum | 1171ee6 | 1997-08-22 20:42:00 +0000 | [diff] [blame] | 423 | #ifdef HAVE_ALARM |
Neal Norwitz | ba3a16c | 2002-03-31 15:27:00 +0000 | [diff] [blame] | 424 | {"alarm", signal_alarm, METH_VARARGS, alarm_doc}, |
Guido van Rossum | 06d511d | 1995-03-10 15:13:48 +0000 | [diff] [blame] | 425 | #endif |
Neal Norwitz | ba3a16c | 2002-03-31 15:27:00 +0000 | [diff] [blame] | 426 | {"signal", signal_signal, METH_VARARGS, signal_doc}, |
| 427 | {"getsignal", signal_getsignal, METH_VARARGS, getsignal_doc}, |
Guido van Rossum | 1171ee6 | 1997-08-22 20:42:00 +0000 | [diff] [blame] | 428 | #ifdef HAVE_PAUSE |
Neil Schemenauer | 78662cf | 2002-03-28 21:04:14 +0000 | [diff] [blame] | 429 | {"pause", (PyCFunction)signal_pause, |
| 430 | METH_NOARGS,pause_doc}, |
Guido van Rossum | 06d511d | 1995-03-10 15:13:48 +0000 | [diff] [blame] | 431 | #endif |
Andrew M. Kuchling | a1abb72 | 2000-08-03 02:34:44 +0000 | [diff] [blame] | 432 | {"default_int_handler", signal_default_int_handler, |
Neal Norwitz | ba3a16c | 2002-03-31 15:27:00 +0000 | [diff] [blame] | 433 | METH_VARARGS, default_int_handler_doc}, |
Michael W. Hudson | 34f20ea | 2002-05-27 15:08:24 +0000 | [diff] [blame^] | 434 | #ifdef HAVE_SIGPROCMASK |
| 435 | {"sigprocmask", (PyCFunction)signal_sigprocmask, |
| 436 | METH_VARARGS, sigprocmask_doc}, |
| 437 | {"sigpending", (PyCFunction)signal_sigpending, |
| 438 | METH_NOARGS, sigpending_doc}, |
| 439 | {"sigsuspend", (PyCFunction)signal_sigsuspend, |
| 440 | METH_O, sigsuspend_doc}, |
| 441 | #endif |
Guido van Rossum | 1d8fb2d | 1998-06-28 16:54:49 +0000 | [diff] [blame] | 442 | {NULL, NULL} /* sentinel */ |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 443 | }; |
| 444 | |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 445 | |
Guido van Rossum | 1d8fb2d | 1998-06-28 16:54:49 +0000 | [diff] [blame] | 446 | static char module_doc[] = |
| 447 | "This module provides mechanisms to use signal handlers in Python.\n\ |
| 448 | \n\ |
| 449 | Functions:\n\ |
| 450 | \n\ |
| 451 | alarm() -- cause SIGALRM after a specified time [Unix only]\n\ |
| 452 | signal() -- set the action for a given signal\n\ |
| 453 | getsignal() -- get the signal action for a given signal\n\ |
| 454 | pause() -- wait until a signal arrives [Unix only]\n\ |
| 455 | default_int_handler() -- default SIGINT handler\n\ |
| 456 | \n\ |
Michael W. Hudson | 34f20ea | 2002-05-27 15:08:24 +0000 | [diff] [blame^] | 457 | sigpending() |\n\ |
| 458 | sigprocmask() |-- posix signal mask handling [Unix only]\n\ |
| 459 | sigsuspend() |\n\ |
| 460 | \n\ |
Guido van Rossum | 1d8fb2d | 1998-06-28 16:54:49 +0000 | [diff] [blame] | 461 | Constants:\n\ |
| 462 | \n\ |
| 463 | SIG_DFL -- used to refer to the system default handler\n\ |
| 464 | SIG_IGN -- used to ignore the signal\n\ |
| 465 | NSIG -- number of defined signals\n\ |
| 466 | \n\ |
| 467 | SIGINT, SIGTERM, etc. -- signal numbers\n\ |
| 468 | \n\ |
| 469 | *** IMPORTANT NOTICE ***\n\ |
| 470 | A signal handler function is called with two arguments:\n\ |
| 471 | the first is the signal number, the second is the interrupted stack frame."; |
| 472 | |
Guido van Rossum | 3886bb6 | 1998-12-04 18:50:17 +0000 | [diff] [blame] | 473 | DL_EXPORT(void) |
Thomas Wouters | f3f33dc | 2000-07-21 06:00:07 +0000 | [diff] [blame] | 474 | initsignal(void) |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 475 | { |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 476 | PyObject *m, *d, *x; |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 477 | int i; |
Guido van Rossum | bb4ba12 | 1994-06-23 11:25:45 +0000 | [diff] [blame] | 478 | |
| 479 | #ifdef WITH_THREAD |
Guido van Rossum | 65d5b57 | 1998-12-21 19:32:43 +0000 | [diff] [blame] | 480 | main_thread = PyThread_get_thread_ident(); |
Guido van Rossum | bb4ba12 | 1994-06-23 11:25:45 +0000 | [diff] [blame] | 481 | main_pid = getpid(); |
| 482 | #endif |
| 483 | |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 484 | /* Create the module and add the functions */ |
Guido van Rossum | 1d8fb2d | 1998-06-28 16:54:49 +0000 | [diff] [blame] | 485 | m = Py_InitModule3("signal", signal_methods, module_doc); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 486 | |
| 487 | /* Add some symbolic constants to the module */ |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 488 | d = PyModule_GetDict(m); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 489 | |
Guido van Rossum | 276fa43 | 2000-06-30 23:04:18 +0000 | [diff] [blame] | 490 | x = DefaultHandler = PyLong_FromVoidPtr((void *)SIG_DFL); |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 491 | if (!x || PyDict_SetItemString(d, "SIG_DFL", x) < 0) |
| 492 | goto finally; |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 493 | |
Guido van Rossum | 276fa43 | 2000-06-30 23:04:18 +0000 | [diff] [blame] | 494 | x = IgnoreHandler = PyLong_FromVoidPtr((void *)SIG_IGN); |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 495 | if (!x || PyDict_SetItemString(d, "SIG_IGN", x) < 0) |
| 496 | goto finally; |
| 497 | |
| 498 | x = PyInt_FromLong((long)NSIG); |
| 499 | if (!x || PyDict_SetItemString(d, "NSIG", x) < 0) |
| 500 | goto finally; |
Guido van Rossum | 08c1661 | 1997-08-02 03:01:42 +0000 | [diff] [blame] | 501 | Py_DECREF(x); |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 502 | |
| 503 | x = IntHandler = PyDict_GetItemString(d, "default_int_handler"); |
| 504 | if (!x) |
| 505 | goto finally; |
Guido van Rossum | 08c1661 | 1997-08-02 03:01:42 +0000 | [diff] [blame] | 506 | Py_INCREF(IntHandler); |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 507 | |
| 508 | Handlers[0].tripped = 0; |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 509 | for (i = 1; i < NSIG; i++) { |
Tim Peters | 4f1b208 | 2000-07-23 21:18:09 +0000 | [diff] [blame] | 510 | void (*t)(int); |
Guido van Rossum | d2cd7ad | 2000-09-16 16:35:28 +0000 | [diff] [blame] | 511 | t = PyOS_getsig(i); |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 512 | Handlers[i].tripped = 0; |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 513 | if (t == SIG_DFL) |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 514 | Handlers[i].func = DefaultHandler; |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 515 | else if (t == SIG_IGN) |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 516 | Handlers[i].func = IgnoreHandler; |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 517 | else |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 518 | Handlers[i].func = Py_None; /* None of our business */ |
| 519 | Py_INCREF(Handlers[i].func); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 520 | } |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 521 | if (Handlers[SIGINT].func == DefaultHandler) { |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 522 | /* Install default int handler */ |
Guido van Rossum | 08c1661 | 1997-08-02 03:01:42 +0000 | [diff] [blame] | 523 | Py_INCREF(IntHandler); |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 524 | Py_DECREF(Handlers[SIGINT].func); |
| 525 | Handlers[SIGINT].func = IntHandler; |
Guido van Rossum | d2cd7ad | 2000-09-16 16:35:28 +0000 | [diff] [blame] | 526 | old_siginthandler = PyOS_setsig(SIGINT, &signal_handler); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 527 | } |
| 528 | |
| 529 | #ifdef SIGHUP |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 530 | x = PyInt_FromLong(SIGHUP); |
| 531 | PyDict_SetItemString(d, "SIGHUP", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 532 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 533 | #endif |
| 534 | #ifdef SIGINT |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 535 | x = PyInt_FromLong(SIGINT); |
| 536 | PyDict_SetItemString(d, "SIGINT", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 537 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 538 | #endif |
Tim Peters | 1ce3cf7 | 2001-10-01 17:58:40 +0000 | [diff] [blame] | 539 | #ifdef SIGBREAK |
| 540 | x = PyInt_FromLong(SIGBREAK); |
| 541 | PyDict_SetItemString(d, "SIGBREAK", x); |
| 542 | Py_XDECREF(x); |
| 543 | #endif |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 544 | #ifdef SIGQUIT |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 545 | x = PyInt_FromLong(SIGQUIT); |
| 546 | PyDict_SetItemString(d, "SIGQUIT", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 547 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 548 | #endif |
| 549 | #ifdef SIGILL |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 550 | x = PyInt_FromLong(SIGILL); |
| 551 | PyDict_SetItemString(d, "SIGILL", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 552 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 553 | #endif |
| 554 | #ifdef SIGTRAP |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 555 | x = PyInt_FromLong(SIGTRAP); |
| 556 | PyDict_SetItemString(d, "SIGTRAP", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 557 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 558 | #endif |
| 559 | #ifdef SIGIOT |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 560 | x = PyInt_FromLong(SIGIOT); |
| 561 | PyDict_SetItemString(d, "SIGIOT", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 562 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 563 | #endif |
| 564 | #ifdef SIGABRT |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 565 | x = PyInt_FromLong(SIGABRT); |
| 566 | PyDict_SetItemString(d, "SIGABRT", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 567 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 568 | #endif |
| 569 | #ifdef SIGEMT |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 570 | x = PyInt_FromLong(SIGEMT); |
| 571 | PyDict_SetItemString(d, "SIGEMT", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 572 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 573 | #endif |
| 574 | #ifdef SIGFPE |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 575 | x = PyInt_FromLong(SIGFPE); |
| 576 | PyDict_SetItemString(d, "SIGFPE", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 577 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 578 | #endif |
| 579 | #ifdef SIGKILL |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 580 | x = PyInt_FromLong(SIGKILL); |
| 581 | PyDict_SetItemString(d, "SIGKILL", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 582 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 583 | #endif |
| 584 | #ifdef SIGBUS |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 585 | x = PyInt_FromLong(SIGBUS); |
| 586 | PyDict_SetItemString(d, "SIGBUS", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 587 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 588 | #endif |
| 589 | #ifdef SIGSEGV |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 590 | x = PyInt_FromLong(SIGSEGV); |
| 591 | PyDict_SetItemString(d, "SIGSEGV", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 592 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 593 | #endif |
| 594 | #ifdef SIGSYS |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 595 | x = PyInt_FromLong(SIGSYS); |
| 596 | PyDict_SetItemString(d, "SIGSYS", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 597 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 598 | #endif |
| 599 | #ifdef SIGPIPE |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 600 | x = PyInt_FromLong(SIGPIPE); |
| 601 | PyDict_SetItemString(d, "SIGPIPE", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 602 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 603 | #endif |
| 604 | #ifdef SIGALRM |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 605 | x = PyInt_FromLong(SIGALRM); |
| 606 | PyDict_SetItemString(d, "SIGALRM", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 607 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 608 | #endif |
| 609 | #ifdef SIGTERM |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 610 | x = PyInt_FromLong(SIGTERM); |
| 611 | PyDict_SetItemString(d, "SIGTERM", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 612 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 613 | #endif |
| 614 | #ifdef SIGUSR1 |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 615 | x = PyInt_FromLong(SIGUSR1); |
| 616 | PyDict_SetItemString(d, "SIGUSR1", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 617 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 618 | #endif |
| 619 | #ifdef SIGUSR2 |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 620 | x = PyInt_FromLong(SIGUSR2); |
| 621 | PyDict_SetItemString(d, "SIGUSR2", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 622 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 623 | #endif |
| 624 | #ifdef SIGCLD |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 625 | x = PyInt_FromLong(SIGCLD); |
| 626 | PyDict_SetItemString(d, "SIGCLD", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 627 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 628 | #endif |
| 629 | #ifdef SIGCHLD |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 630 | x = PyInt_FromLong(SIGCHLD); |
| 631 | PyDict_SetItemString(d, "SIGCHLD", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 632 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 633 | #endif |
| 634 | #ifdef SIGPWR |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 635 | x = PyInt_FromLong(SIGPWR); |
| 636 | PyDict_SetItemString(d, "SIGPWR", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 637 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 638 | #endif |
| 639 | #ifdef SIGIO |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 640 | x = PyInt_FromLong(SIGIO); |
| 641 | PyDict_SetItemString(d, "SIGIO", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 642 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 643 | #endif |
| 644 | #ifdef SIGURG |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 645 | x = PyInt_FromLong(SIGURG); |
| 646 | PyDict_SetItemString(d, "SIGURG", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 647 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 648 | #endif |
| 649 | #ifdef SIGWINCH |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 650 | x = PyInt_FromLong(SIGWINCH); |
| 651 | PyDict_SetItemString(d, "SIGWINCH", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 652 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 653 | #endif |
| 654 | #ifdef SIGPOLL |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 655 | x = PyInt_FromLong(SIGPOLL); |
| 656 | PyDict_SetItemString(d, "SIGPOLL", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 657 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 658 | #endif |
| 659 | #ifdef SIGSTOP |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 660 | x = PyInt_FromLong(SIGSTOP); |
| 661 | PyDict_SetItemString(d, "SIGSTOP", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 662 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 663 | #endif |
| 664 | #ifdef SIGTSTP |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 665 | x = PyInt_FromLong(SIGTSTP); |
| 666 | PyDict_SetItemString(d, "SIGTSTP", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 667 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 668 | #endif |
| 669 | #ifdef SIGCONT |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 670 | x = PyInt_FromLong(SIGCONT); |
| 671 | PyDict_SetItemString(d, "SIGCONT", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 672 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 673 | #endif |
| 674 | #ifdef SIGTTIN |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 675 | x = PyInt_FromLong(SIGTTIN); |
| 676 | PyDict_SetItemString(d, "SIGTTIN", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 677 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 678 | #endif |
| 679 | #ifdef SIGTTOU |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 680 | x = PyInt_FromLong(SIGTTOU); |
| 681 | PyDict_SetItemString(d, "SIGTTOU", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 682 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 683 | #endif |
| 684 | #ifdef SIGVTALRM |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 685 | x = PyInt_FromLong(SIGVTALRM); |
| 686 | PyDict_SetItemString(d, "SIGVTALRM", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 687 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 688 | #endif |
| 689 | #ifdef SIGPROF |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 690 | x = PyInt_FromLong(SIGPROF); |
| 691 | PyDict_SetItemString(d, "SIGPROF", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 692 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 693 | #endif |
Barry Warsaw | 14ed5fb | 1996-12-16 20:24:22 +0000 | [diff] [blame] | 694 | #ifdef SIGXCPU |
| 695 | x = PyInt_FromLong(SIGXCPU); |
| 696 | PyDict_SetItemString(d, "SIGXCPU", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 697 | Py_XDECREF(x); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 698 | #endif |
Barry Warsaw | 14ed5fb | 1996-12-16 20:24:22 +0000 | [diff] [blame] | 699 | #ifdef SIGXFSZ |
| 700 | x = PyInt_FromLong(SIGXFSZ); |
| 701 | PyDict_SetItemString(d, "SIGXFSZ", x); |
Barry Warsaw | 73a75eb | 1997-01-09 23:50:28 +0000 | [diff] [blame] | 702 | Py_XDECREF(x); |
Barry Warsaw | 14ed5fb | 1996-12-16 20:24:22 +0000 | [diff] [blame] | 703 | #endif |
Martin v. Löwis | 175af25 | 2002-01-12 11:43:25 +0000 | [diff] [blame] | 704 | #ifdef SIGINFO |
| 705 | x = PyInt_FromLong(SIGINFO); |
| 706 | PyDict_SetItemString(d, "SIGINFO", x); |
| 707 | Py_XDECREF(x); |
| 708 | #endif |
Michael W. Hudson | 34f20ea | 2002-05-27 15:08:24 +0000 | [diff] [blame^] | 709 | #ifdef HAVE_SIGPROCMASK |
| 710 | x = PyInt_FromLong(SIG_BLOCK); |
| 711 | PyDict_SetItemString(d, "SIG_BLOCK", x); |
| 712 | Py_XDECREF(x); |
| 713 | x = PyInt_FromLong(SIG_UNBLOCK); |
| 714 | PyDict_SetItemString(d, "SIG_UNBLOCK", x); |
| 715 | Py_XDECREF(x); |
| 716 | x = PyInt_FromLong(SIG_SETMASK); |
| 717 | PyDict_SetItemString(d, "SIG_SETMASK", x); |
| 718 | Py_XDECREF(x); |
| 719 | #endif |
| 720 | |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 721 | if (!PyErr_Occurred()) |
| 722 | return; |
| 723 | |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 724 | /* Check for errors */ |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 725 | finally: |
Guido van Rossum | 08c1661 | 1997-08-02 03:01:42 +0000 | [diff] [blame] | 726 | return; |
| 727 | } |
| 728 | |
| 729 | static void |
Thomas Wouters | f3f33dc | 2000-07-21 06:00:07 +0000 | [diff] [blame] | 730 | finisignal(void) |
Guido van Rossum | 08c1661 | 1997-08-02 03:01:42 +0000 | [diff] [blame] | 731 | { |
| 732 | int i; |
Guido van Rossum | 7ff20ac | 1997-11-03 21:53:55 +0000 | [diff] [blame] | 733 | PyObject *func; |
Guido van Rossum | 08c1661 | 1997-08-02 03:01:42 +0000 | [diff] [blame] | 734 | |
Guido van Rossum | d2cd7ad | 2000-09-16 16:35:28 +0000 | [diff] [blame] | 735 | PyOS_setsig(SIGINT, old_siginthandler); |
Guido van Rossum | 7ff20ac | 1997-11-03 21:53:55 +0000 | [diff] [blame] | 736 | old_siginthandler = SIG_DFL; |
Guido van Rossum | 08c1661 | 1997-08-02 03:01:42 +0000 | [diff] [blame] | 737 | |
| 738 | for (i = 1; i < NSIG; i++) { |
Guido van Rossum | 7ff20ac | 1997-11-03 21:53:55 +0000 | [diff] [blame] | 739 | func = Handlers[i].func; |
Guido van Rossum | 08c1661 | 1997-08-02 03:01:42 +0000 | [diff] [blame] | 740 | Handlers[i].tripped = 0; |
Guido van Rossum | 08c1661 | 1997-08-02 03:01:42 +0000 | [diff] [blame] | 741 | Handlers[i].func = NULL; |
Guido van Rossum | 7ff20ac | 1997-11-03 21:53:55 +0000 | [diff] [blame] | 742 | if (i != SIGINT && func != NULL && func != Py_None && |
| 743 | func != DefaultHandler && func != IgnoreHandler) |
Guido van Rossum | d2cd7ad | 2000-09-16 16:35:28 +0000 | [diff] [blame] | 744 | PyOS_setsig(i, SIG_DFL); |
Guido van Rossum | 7ff20ac | 1997-11-03 21:53:55 +0000 | [diff] [blame] | 745 | Py_XDECREF(func); |
Guido van Rossum | 08c1661 | 1997-08-02 03:01:42 +0000 | [diff] [blame] | 746 | } |
| 747 | |
| 748 | Py_XDECREF(IntHandler); |
| 749 | IntHandler = NULL; |
| 750 | Py_XDECREF(DefaultHandler); |
| 751 | DefaultHandler = NULL; |
| 752 | Py_XDECREF(IgnoreHandler); |
| 753 | IgnoreHandler = NULL; |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 754 | } |
| 755 | |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 756 | |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 757 | /* Declared in pyerrors.h */ |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 758 | int |
Thomas Wouters | f3f33dc | 2000-07-21 06:00:07 +0000 | [diff] [blame] | 759 | PyErr_CheckSignals(void) |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 760 | { |
| 761 | int i; |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 762 | PyObject *f; |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 763 | |
| 764 | if (!is_tripped) |
Guido van Rossum | 6299d1e | 1994-05-31 12:51:13 +0000 | [diff] [blame] | 765 | return 0; |
Guido van Rossum | bb4ba12 | 1994-06-23 11:25:45 +0000 | [diff] [blame] | 766 | #ifdef WITH_THREAD |
Guido van Rossum | 65d5b57 | 1998-12-21 19:32:43 +0000 | [diff] [blame] | 767 | if (PyThread_get_thread_ident() != main_thread) |
Guido van Rossum | bb4ba12 | 1994-06-23 11:25:45 +0000 | [diff] [blame] | 768 | return 0; |
| 769 | #endif |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 770 | if (!(f = PyEval_GetFrame())) |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 771 | f = Py_None; |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 772 | |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 773 | for (i = 1; i < NSIG; i++) { |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 774 | if (Handlers[i].tripped) { |
| 775 | PyObject *result = NULL; |
| 776 | PyObject *arglist = Py_BuildValue("(iO)", i, f); |
| 777 | Handlers[i].tripped = 0; |
| 778 | |
| 779 | if (arglist) { |
| 780 | result = PyEval_CallObject(Handlers[i].func, |
| 781 | arglist); |
Guido van Rossum | e4485b0 | 1994-09-07 14:32:49 +0000 | [diff] [blame] | 782 | Py_DECREF(arglist); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 783 | } |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 784 | if (!result) |
Guido van Rossum | fcdd0e4 | 1997-01-21 06:13:09 +0000 | [diff] [blame] | 785 | return -1; |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 786 | |
| 787 | Py_DECREF(result); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 788 | } |
| 789 | } |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 790 | is_tripped = 0; |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 791 | return 0; |
| 792 | } |
| 793 | |
Guido van Rossum | d2cd7ad | 2000-09-16 16:35:28 +0000 | [diff] [blame] | 794 | |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 795 | /* Replacements for intrcheck.c functionality |
| 796 | * Declared in pyerrors.h |
| 797 | */ |
| 798 | void |
Thomas Wouters | f3f33dc | 2000-07-21 06:00:07 +0000 | [diff] [blame] | 799 | PyErr_SetInterrupt(void) |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 800 | { |
| 801 | is_tripped++; |
| 802 | Handlers[SIGINT].tripped = 1; |
Thomas Wouters | 334fb89 | 2000-07-25 12:56:38 +0000 | [diff] [blame] | 803 | Py_AddPendingCall((int (*)(void *))PyErr_CheckSignals, NULL); |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 804 | } |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 805 | |
| 806 | void |
Thomas Wouters | f3f33dc | 2000-07-21 06:00:07 +0000 | [diff] [blame] | 807 | PyOS_InitInterrupts(void) |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 808 | { |
| 809 | initsignal(); |
Guido van Rossum | 08c1661 | 1997-08-02 03:01:42 +0000 | [diff] [blame] | 810 | _PyImport_FixupExtension("signal", "signal"); |
| 811 | } |
| 812 | |
| 813 | void |
Thomas Wouters | f3f33dc | 2000-07-21 06:00:07 +0000 | [diff] [blame] | 814 | PyOS_FiniInterrupts(void) |
Guido van Rossum | 08c1661 | 1997-08-02 03:01:42 +0000 | [diff] [blame] | 815 | { |
| 816 | finisignal(); |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 817 | } |
| 818 | |
| 819 | int |
Thomas Wouters | f3f33dc | 2000-07-21 06:00:07 +0000 | [diff] [blame] | 820 | PyOS_InterruptOccurred(void) |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 821 | { |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 822 | if (Handlers[SIGINT].tripped) { |
Guido van Rossum | bb4ba12 | 1994-06-23 11:25:45 +0000 | [diff] [blame] | 823 | #ifdef WITH_THREAD |
Guido van Rossum | 65d5b57 | 1998-12-21 19:32:43 +0000 | [diff] [blame] | 824 | if (PyThread_get_thread_ident() != main_thread) |
Guido van Rossum | bb4ba12 | 1994-06-23 11:25:45 +0000 | [diff] [blame] | 825 | return 0; |
| 826 | #endif |
Barry Warsaw | 9297117 | 1997-01-03 00:14:25 +0000 | [diff] [blame] | 827 | Handlers[SIGINT].tripped = 0; |
Guido van Rossum | 6299d1e | 1994-05-31 12:51:13 +0000 | [diff] [blame] | 828 | return 1; |
| 829 | } |
| 830 | return 0; |
Guido van Rossum | 398d9fe | 1994-05-11 08:59:13 +0000 | [diff] [blame] | 831 | } |
Guido van Rossum | 359bcaa | 1997-11-14 22:24:28 +0000 | [diff] [blame] | 832 | |
| 833 | void |
Thomas Wouters | f3f33dc | 2000-07-21 06:00:07 +0000 | [diff] [blame] | 834 | PyOS_AfterFork(void) |
Guido van Rossum | 359bcaa | 1997-11-14 22:24:28 +0000 | [diff] [blame] | 835 | { |
| 836 | #ifdef WITH_THREAD |
Guido van Rossum | fee3a2d | 2000-08-27 17:34:07 +0000 | [diff] [blame] | 837 | PyEval_ReInitThreads(); |
Guido van Rossum | 65d5b57 | 1998-12-21 19:32:43 +0000 | [diff] [blame] | 838 | main_thread = PyThread_get_thread_ident(); |
Guido van Rossum | 359bcaa | 1997-11-14 22:24:28 +0000 | [diff] [blame] | 839 | main_pid = getpid(); |
| 840 | #endif |
| 841 | } |