newlib-cygwin/winsup/cygwin/signal.cc

440 lines
9.6 KiB
C++
Raw Normal View History

2000-02-18 03:38:33 +08:00
/* signal.cc
Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Red Hat, Inc.
2000-02-18 03:38:33 +08:00
Written by Steve Chamberlain of Cygnus Support, sac@cygnus.com
Significant changes by Sergey Okhapkin <sos@prospect.com.ru>
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include "winsup.h"
#include <stdlib.h>
#include "cygerrno.h"
#include <sys/cygwin.h>
#include "sigproc.h"
#include "pinfo.h"
2000-02-18 03:38:33 +08:00
* exceptions.cc (set_console_handler): Don't allocate console_handler_thread_waiter. It is obsolete. (ctrl_c_handler): Don't use console_handler_thread_waiter. * path.cc (hash_path_name): Fix handling of relative names. Make case insensitive. * path.h (suffix_info): Use initializers. * pinfo.h (_pinfo): Avoid initializers for null case. * resource.cc (fill_rusage): Zero rest of rusage structure. * security.cc (set_process_privileges): Don't reopen parent process. Just use hMainProc. * signal.cc (signal): Track when a signal handler has been used. (sigaction): Ditto. * sigproc.cc (pchildren): Use default initializer. (zombies): Ditto. (sigproc_terminate): Avoid closing handles that will be closed on exit anyway. (wait_sig): Send signal to "parent" on EXECing, not FORKing. (wait_subproc): Send SIGCHLD here rather than in proc_wait to avoid potential muto conflicts. * sigproc.h (sigthread): Don't initialize to zero. It's the default. * spawn.cc (spawn_guts): Fill in resources from exec parent prior to termination. * sync.h (muto): Don't initialize to zero. * syscalls.cc (close_all_files): Use one lock around entire loop and call fhandler close/release stuff directly. (_read): Don't use ready_for_read if there are not signal handlers active. * dcrt0.cc (dll_crt0_1): Fix display of "title". (do_exit): Use pinfo exit method to exit. (__api_fatal): Ditto. * exceptions.cc (signal_exit): Ditto. * fork.cc (fork_child): Remove debugging stuff. Use pinfo_fixup_after fork in place of exec_fixup_after_fork. * pinfo.cc (pinfo_fixup_after_fork): New method. (pinfo_fixup_in_spawned_child): Ditto. (_pinfo::exit): New method. (_pinfo::init): Remove recursion. Detect pathological case where pinfo structure already exists for new pid. * pinfo.h (_pinfo): Reorganize slightly. Add new method and new function declarations. * sigproc.cc (proc_exists): Previous simplification was a little to simple. Try harder to detect if a process exists. (proc_terminate): Use PID_EXITED setting to determine if process is still around. (WFSO): Remove debugging statement. (WFMO): Ditto. * spawn.cc (exec_fixup_after_fork): Eliminate. (spawn_guts): Always set old_title to NULL. Is it really needed? Move hexec_proc to pinfo.cc. Call pinfo_fixup_in_spawned_child to eliminate handle link after a spawn. * include/sys/cygwin.h: Remove PID_NOT_IN_USE. Add PID_EXITED.
2000-10-15 09:37:07 +08:00
int sigcatchers; /* FIXME: Not thread safe. */
#define sigtrapped(func) ((func) != SIG_IGN && (func) != SIG_DFL)
static inline void
set_sigcatchers (void (*oldsig) (int), void (*cursig) (int))
{
#ifdef DEBUGGING
int last_sigcatchers = sigcatchers;
#endif
if (!sigtrapped (oldsig) && sigtrapped (cursig))
sigcatchers++;
else if (sigtrapped (oldsig) && !sigtrapped (cursig))
sigcatchers--;
#ifdef DEBUGGING
if (last_sigcatchers != sigcatchers)
sigproc_printf ("last %d, old %d, cur %p, cur %p", last_sigcatchers,
sigcatchers, oldsig, cursig);
#endif
}
extern "C" _sig_func_ptr
2000-02-18 03:38:33 +08:00
signal (int sig, _sig_func_ptr func)
{
sig_dispatch_pending ();
2000-02-18 03:38:33 +08:00
_sig_func_ptr prev;
/* check that sig is in right range */
if (sig < 0 || sig >= NSIG || sig == SIGKILL || sig == SIGSTOP)
2000-02-18 03:38:33 +08:00
{
set_errno (EINVAL);
syscall_printf ("SIG_ERR = signal (%d, %p)", sig, func);
return (_sig_func_ptr) SIG_ERR;
}
prev = myself->getsig (sig).sa_handler;
myself->getsig (sig).sa_handler = func;
myself->getsig (sig).sa_mask = 0;
/* SA_RESTART is set to maintain BSD compatible signal behaviour by default.
This is also compatible with the behaviour of signal(2) in Linux. */
myself->getsig (sig).sa_flags |= SA_RESTART;
set_sigcatchers (prev, func);
2000-02-18 03:38:33 +08:00
syscall_printf ("%p = signal (%d, %p)", prev, sig, func);
return prev;
}
extern "C" int
nanosleep (const struct timespec *rqtp, struct timespec *rmtp)
2000-02-18 03:38:33 +08:00
{
int res = 0;
sig_dispatch_pending ();
sigframe thisframe (mainthread);
2003-01-15 04:05:49 +08:00
pthread_testcancel ();
if (rqtp->tv_sec < 0 || rqtp->tv_nsec < 0 || rqtp->tv_nsec > 999999999)
{
set_errno (EINVAL);
return -1;
}
DWORD req = rqtp->tv_sec * 1000 + (rqtp->tv_nsec + 500000) / 1000000;
DWORD start_time = GetTickCount ();
DWORD end_time = start_time + req;
syscall_printf ("nanosleep (%ld)", req);
int rc = pthread::cancelable_wait (signal_arrived, req);
DWORD now = GetTickCount ();
DWORD rem = (rc == WAIT_TIMEOUT || now >= end_time) ? 0 : end_time - now;
if (rc == WAIT_OBJECT_0)
{
(void) thisframe.call_signal_handler ();
set_errno (EINTR);
res = -1;
}
if (rmtp)
{
rmtp->tv_sec = rem / 1000;
rmtp->tv_nsec = (rem % 1000) * 1000000;
}
syscall_printf ("%d = nanosleep (%ld, %ld)", res, req, rem);
return res;
2000-02-18 03:38:33 +08:00
}
extern "C" unsigned int
sleep (unsigned int seconds)
2000-02-18 03:38:33 +08:00
{
struct timespec req, rem;
req.tv_sec = seconds;
req.tv_nsec = 0;
nanosleep (&req, &rem);
return rem.tv_sec + (rem.tv_nsec + 500000000) / 1000000000;
}
2003-01-15 04:05:49 +08:00
extern "C" unsigned int
usleep (unsigned int useconds)
{
struct timespec req;
req.tv_sec = useconds / 1000000;
req.tv_nsec = (useconds % 1000000) * 1000;
int res = nanosleep (&req, 0);
return res;
2000-02-18 03:38:33 +08:00
}
extern "C" int
2000-02-18 03:38:33 +08:00
sigprocmask (int sig, const sigset_t *set, sigset_t *oldset)
{
sig_dispatch_pending ();
2000-02-18 03:38:33 +08:00
/* check that sig is in right range */
if (sig < 0 || sig >= NSIG)
{
set_errno (EINVAL);
syscall_printf ("SIG_ERR = sigprocmask signal %d out of range", sig);
2000-02-18 03:38:33 +08:00
return -1;
}
if (oldset)
*oldset = myself->getsigmask ();
if (set)
{
sigset_t newmask = myself->getsigmask ();
switch (sig)
{
case SIG_BLOCK:
/* add set to current mask */
newmask |= *set;
break;
case SIG_UNBLOCK:
/* remove set from current mask */
newmask &= ~*set;
break;
case SIG_SETMASK:
/* just set it */
newmask = *set;
break;
default:
set_errno (EINVAL);
return -1;
}
(void) set_process_mask (newmask);
}
return 0;
}
static int
kill_worker (pid_t pid, int sig)
{
sig_dispatch_pending ();
2000-02-18 03:38:33 +08:00
int res = 0;
* include/cygwin/version.h: Bump DLL minor version number to 5 due to all of the changes below. Redefine process structure to avoid a fixed size table. Redefine pinfo/_pinfo classes. Use these throughout. * dcrt0.cc (dll_crt0_1): Accomodate set_myself argument change. (__api_fatal): Accomodate _pinfo::record_death argument change. * exceptions.cc (really_exit): Ditto. (sig_handle_tty_stop): Use pinfo constructor to access process info. (events_init): Don't create pinfo_mutex since it is no longer required. * external.cc (fillout_pinfo): Use winpids class to iterate over all system pids. (cygwin_internal): lock_pinfo_for_update and unlock_pinfo are now noops. * fhandler_termios.cc (fhandler_termios::set_ctty): Use pinfo constructor to access process info. * fork.cc (fork): Reorganize to initialize child info after the child has started since that is when we know the child's winpid, which is necessary to allocate the pinfo shared memory. * mmap.cc (recreate_mmaps_after_fork): Change arg type to _pinfo. * pinfo.cc: Rename pinfo methods to _pinfo throughout. Eliminate pinfo_list stuff. (set_myself): Accept a pid argument now. Call pinfo initializer to initialize myself. Detect when this is an "execed" process and create an "indirect" pid block. (pinfo_init): Accomodate set_myself arg change. (procinfo): Remove. (pinfo::lock_pinfo): Remove. (pinfo::unlock_pinfo): Remove. (pinfo::init): New method. Allocates shared memory space for process pinfo structure. (pinfo::record_death): Don't call locking functions. (cygwin_winpid_to_pid): Simplify by using new pinfo constructor. (EnumProcessesW95): New function for iterating over processes on Windows 95. (winpids::winpids): New constructor for winpids class. Sets up a list of process ids. (enum_init): Initialize w95/wnt pid enumerators. * shared.cc (shared-info::initialize): Remove pid initialization. * shared.h: Move pinfo stuff into pinfo.h. (class shared_info): Remove pinfo_list element. * signal.cc (kill_worker): Use pinfo constructor to access process info. (kill_pgrp): Ditto. Use winpids methods to access list of processes. * sigproc.cc: Throughout, modify to use _pinfo where appropriate. (proc_exists (pid_t)): New function. Determines if a process exists based on the pid. (proc_exists (_pinfo *p): Use new proc_exists function above. (proc_subproc): Copy pinfo stuff around rather than _pinfo pointers. Try to be careful about releasing shared memory when we don't need it anymore. Remove pinfo locks. (remove_zombies): Remove pinfo memory when zombie is going away. * sigproc.h: Reflect _pinfo/pinfo changes in sigproc.cc. * spawn.cc (spawn_guts): Eliminate pinfo *child argument. Reorganize to only initialize child pinfo after process has been started and we know the windows pid. (_spawnve): Reflect spawn_guts changes. * syscalls.cc (setpgid): Use pinfo constructor to access process info. (getpgid): Ditto. (internal_getlogin): Use _pinfo. * winsup.h: Eliminate pinfo_mutex. Eliminate spawn_guts declaration since it is static now. Reflect set_myself argument change. * include/sys/cygwin.h: Add some PID_* enums to accomodate new pinfo stuff. * include/cygwin/version.h: Update minor version for cygdrive changes below.
2000-07-30 00:24:59 +08:00
pinfo dest (pid);
2000-02-18 03:38:33 +08:00
BOOL sendSIGCONT;
if (!dest)
{
set_errno (ESRCH);
return -1;
}
dest->setthread2signal (NULL);
2000-02-18 03:38:33 +08:00
if ((sendSIGCONT = (sig < 0)))
sig = -sig;
#if 0
if (dest == myself && !sendSIGCONT)
dest = myself_nowait_nonmain;
#endif
if (sig == 0)
{
res = proc_exists (dest) ? 0 : -1;
if (res < 0)
set_errno (ESRCH);
}
2000-02-18 03:38:33 +08:00
else if ((res = sig_send (dest, sig)))
{
sigproc_printf ("%d = sig_send, %E ", res);
res = -1;
}
else if (sendSIGCONT)
2000-02-18 03:38:33 +08:00
(void) sig_send (dest, SIGCONT);
syscall_printf ("%d = kill_worker (%d, %d)", res, pid, sig);
return res;
}
int
raise (int sig)
{
return kill (myself->pid, sig);
}
2000-02-18 03:38:33 +08:00
int
kill (pid_t pid, int sig)
2000-02-18 03:38:33 +08:00
{
sigframe thisframe (mainthread);
2000-02-18 03:38:33 +08:00
syscall_printf ("kill (%d, %d)", pid, sig);
/* check that sig is in right range */
if (sig < 0 || sig >= NSIG)
{
set_errno (EINVAL);
syscall_printf ("signal %d out of range", sig);
2000-02-18 03:38:33 +08:00
return -1;
}
/* Silently ignore stop signals from a member of orphaned process group.
FIXME: Why??? */
if (ISSTATE (myself, PID_ORPHANED) &&
2000-02-18 03:38:33 +08:00
(sig == SIGTSTP || sig == SIGTTIN || sig == SIGTTOU))
sig = 0;
return (pid > 0) ? kill_worker (pid, sig) : kill_pgrp (-pid, sig);
}
int
kill_pgrp (pid_t pid, int sig)
{
int res = 0;
int found = 0;
int killself = 0;
sigframe thisframe (mainthread);
2000-02-18 03:38:33 +08:00
sigproc_printf ("pid %d, signal %d", pid, sig);
2000-02-18 03:38:33 +08:00
* include/cygwin/version.h: Bump DLL minor version number to 5 due to all of the changes below. Redefine process structure to avoid a fixed size table. Redefine pinfo/_pinfo classes. Use these throughout. * dcrt0.cc (dll_crt0_1): Accomodate set_myself argument change. (__api_fatal): Accomodate _pinfo::record_death argument change. * exceptions.cc (really_exit): Ditto. (sig_handle_tty_stop): Use pinfo constructor to access process info. (events_init): Don't create pinfo_mutex since it is no longer required. * external.cc (fillout_pinfo): Use winpids class to iterate over all system pids. (cygwin_internal): lock_pinfo_for_update and unlock_pinfo are now noops. * fhandler_termios.cc (fhandler_termios::set_ctty): Use pinfo constructor to access process info. * fork.cc (fork): Reorganize to initialize child info after the child has started since that is when we know the child's winpid, which is necessary to allocate the pinfo shared memory. * mmap.cc (recreate_mmaps_after_fork): Change arg type to _pinfo. * pinfo.cc: Rename pinfo methods to _pinfo throughout. Eliminate pinfo_list stuff. (set_myself): Accept a pid argument now. Call pinfo initializer to initialize myself. Detect when this is an "execed" process and create an "indirect" pid block. (pinfo_init): Accomodate set_myself arg change. (procinfo): Remove. (pinfo::lock_pinfo): Remove. (pinfo::unlock_pinfo): Remove. (pinfo::init): New method. Allocates shared memory space for process pinfo structure. (pinfo::record_death): Don't call locking functions. (cygwin_winpid_to_pid): Simplify by using new pinfo constructor. (EnumProcessesW95): New function for iterating over processes on Windows 95. (winpids::winpids): New constructor for winpids class. Sets up a list of process ids. (enum_init): Initialize w95/wnt pid enumerators. * shared.cc (shared-info::initialize): Remove pid initialization. * shared.h: Move pinfo stuff into pinfo.h. (class shared_info): Remove pinfo_list element. * signal.cc (kill_worker): Use pinfo constructor to access process info. (kill_pgrp): Ditto. Use winpids methods to access list of processes. * sigproc.cc: Throughout, modify to use _pinfo where appropriate. (proc_exists (pid_t)): New function. Determines if a process exists based on the pid. (proc_exists (_pinfo *p): Use new proc_exists function above. (proc_subproc): Copy pinfo stuff around rather than _pinfo pointers. Try to be careful about releasing shared memory when we don't need it anymore. Remove pinfo locks. (remove_zombies): Remove pinfo memory when zombie is going away. * sigproc.h: Reflect _pinfo/pinfo changes in sigproc.cc. * spawn.cc (spawn_guts): Eliminate pinfo *child argument. Reorganize to only initialize child pinfo after process has been started and we know the windows pid. (_spawnve): Reflect spawn_guts changes. * syscalls.cc (setpgid): Use pinfo constructor to access process info. (getpgid): Ditto. (internal_getlogin): Use _pinfo. * winsup.h: Eliminate pinfo_mutex. Eliminate spawn_guts declaration since it is static now. Reflect set_myself argument change. * include/sys/cygwin.h: Add some PID_* enums to accomodate new pinfo stuff. * include/cygwin/version.h: Update minor version for cygdrive changes below.
2000-07-30 00:24:59 +08:00
winpids pids;
for (unsigned i = 0; i < pids.npids; i++)
2000-02-18 03:38:33 +08:00
{
_pinfo *p = pids[i];
2000-02-18 03:38:33 +08:00
if (!proc_exists (p))
continue;
/* Is it a process we want to kill? */
if ((pid == 0 && (p->pgid != myself->pgid || p->ctty != myself->ctty)) ||
(pid > 1 && p->pgid != pid) ||
(sig < 0 && NOTSTATE (p, PID_STOPPED)))
continue;
2000-02-18 03:38:33 +08:00
sigproc_printf ("killing pid %d, pgrp %d, p->ctty %d, myself->ctty %d",
p->pid, p->pgid, p->ctty, myself->ctty);
if (p == myself)
killself++;
else if (kill_worker (p->pid, sig))
res = -1;
found++;
}
if (killself && kill_worker (myself->pid, sig))
res = -1;
if (!found)
{
set_errno (ESRCH);
res = -1;
}
syscall_printf ("%d = kill (%d, %d)", res, pid, sig);
return res;
}
extern "C" int
killpg (pid_t pgrp, int sig)
2000-02-18 03:38:33 +08:00
{
return kill (-pgrp, sig);
2000-02-18 03:38:33 +08:00
}
extern "C" void
abort (void)
{
sig_dispatch_pending ();
sigframe thisframe (mainthread);
/* Flush all streams as per SUSv2.
From my reading of this document, this isn't strictly correct.
The streams are supposed to be flushed prior to exit. However,
if there is I/O in any signal handler that will not necessarily
be flushed.
However this is the way FreeBSD does it, and it is much easier to
do things this way, so... */
if (_REENT->__cleanup)
_REENT->__cleanup (_REENT);
/* Ensure that SIGABRT can be caught regardless of blockage. */
sigset_t sig_mask;
sigfillset (&sig_mask);
sigdelset (&sig_mask, SIGABRT);
set_process_mask (sig_mask);
raise (SIGABRT);
(void) thisframe.call_signal_handler (); /* Call any signal handler */
do_exit (1); /* signal handler didn't exit. Goodbye. */
}
extern "C" int
* exceptions.cc (set_console_handler): Don't allocate console_handler_thread_waiter. It is obsolete. (ctrl_c_handler): Don't use console_handler_thread_waiter. * path.cc (hash_path_name): Fix handling of relative names. Make case insensitive. * path.h (suffix_info): Use initializers. * pinfo.h (_pinfo): Avoid initializers for null case. * resource.cc (fill_rusage): Zero rest of rusage structure. * security.cc (set_process_privileges): Don't reopen parent process. Just use hMainProc. * signal.cc (signal): Track when a signal handler has been used. (sigaction): Ditto. * sigproc.cc (pchildren): Use default initializer. (zombies): Ditto. (sigproc_terminate): Avoid closing handles that will be closed on exit anyway. (wait_sig): Send signal to "parent" on EXECing, not FORKing. (wait_subproc): Send SIGCHLD here rather than in proc_wait to avoid potential muto conflicts. * sigproc.h (sigthread): Don't initialize to zero. It's the default. * spawn.cc (spawn_guts): Fill in resources from exec parent prior to termination. * sync.h (muto): Don't initialize to zero. * syscalls.cc (close_all_files): Use one lock around entire loop and call fhandler close/release stuff directly. (_read): Don't use ready_for_read if there are not signal handlers active. * dcrt0.cc (dll_crt0_1): Fix display of "title". (do_exit): Use pinfo exit method to exit. (__api_fatal): Ditto. * exceptions.cc (signal_exit): Ditto. * fork.cc (fork_child): Remove debugging stuff. Use pinfo_fixup_after fork in place of exec_fixup_after_fork. * pinfo.cc (pinfo_fixup_after_fork): New method. (pinfo_fixup_in_spawned_child): Ditto. (_pinfo::exit): New method. (_pinfo::init): Remove recursion. Detect pathological case where pinfo structure already exists for new pid. * pinfo.h (_pinfo): Reorganize slightly. Add new method and new function declarations. * sigproc.cc (proc_exists): Previous simplification was a little to simple. Try harder to detect if a process exists. (proc_terminate): Use PID_EXITED setting to determine if process is still around. (WFSO): Remove debugging statement. (WFMO): Ditto. * spawn.cc (exec_fixup_after_fork): Eliminate. (spawn_guts): Always set old_title to NULL. Is it really needed? Move hexec_proc to pinfo.cc. Call pinfo_fixup_in_spawned_child to eliminate handle link after a spawn. * include/sys/cygwin.h: Remove PID_NOT_IN_USE. Add PID_EXITED.
2000-10-15 09:37:07 +08:00
sigaction (int sig, const struct sigaction *newact, struct sigaction *oldact)
2000-02-18 03:38:33 +08:00
{
sig_dispatch_pending ();
sigproc_printf ("signal %d, newact %p, oldact %p", sig, newact, oldact);
2000-02-18 03:38:33 +08:00
/* check that sig is in right range */
if (sig < 0 || sig >= NSIG)
{
set_errno (EINVAL);
syscall_printf ("SIG_ERR = sigaction signal %d out of range", sig);
2000-02-18 03:38:33 +08:00
return -1;
}
* exceptions.cc (set_console_handler): Don't allocate console_handler_thread_waiter. It is obsolete. (ctrl_c_handler): Don't use console_handler_thread_waiter. * path.cc (hash_path_name): Fix handling of relative names. Make case insensitive. * path.h (suffix_info): Use initializers. * pinfo.h (_pinfo): Avoid initializers for null case. * resource.cc (fill_rusage): Zero rest of rusage structure. * security.cc (set_process_privileges): Don't reopen parent process. Just use hMainProc. * signal.cc (signal): Track when a signal handler has been used. (sigaction): Ditto. * sigproc.cc (pchildren): Use default initializer. (zombies): Ditto. (sigproc_terminate): Avoid closing handles that will be closed on exit anyway. (wait_sig): Send signal to "parent" on EXECing, not FORKing. (wait_subproc): Send SIGCHLD here rather than in proc_wait to avoid potential muto conflicts. * sigproc.h (sigthread): Don't initialize to zero. It's the default. * spawn.cc (spawn_guts): Fill in resources from exec parent prior to termination. * sync.h (muto): Don't initialize to zero. * syscalls.cc (close_all_files): Use one lock around entire loop and call fhandler close/release stuff directly. (_read): Don't use ready_for_read if there are not signal handlers active. * dcrt0.cc (dll_crt0_1): Fix display of "title". (do_exit): Use pinfo exit method to exit. (__api_fatal): Ditto. * exceptions.cc (signal_exit): Ditto. * fork.cc (fork_child): Remove debugging stuff. Use pinfo_fixup_after fork in place of exec_fixup_after_fork. * pinfo.cc (pinfo_fixup_after_fork): New method. (pinfo_fixup_in_spawned_child): Ditto. (_pinfo::exit): New method. (_pinfo::init): Remove recursion. Detect pathological case where pinfo structure already exists for new pid. * pinfo.h (_pinfo): Reorganize slightly. Add new method and new function declarations. * sigproc.cc (proc_exists): Previous simplification was a little to simple. Try harder to detect if a process exists. (proc_terminate): Use PID_EXITED setting to determine if process is still around. (WFSO): Remove debugging statement. (WFMO): Ditto. * spawn.cc (exec_fixup_after_fork): Eliminate. (spawn_guts): Always set old_title to NULL. Is it really needed? Move hexec_proc to pinfo.cc. Call pinfo_fixup_in_spawned_child to eliminate handle link after a spawn. * include/sys/cygwin.h: Remove PID_NOT_IN_USE. Add PID_EXITED.
2000-10-15 09:37:07 +08:00
struct sigaction oa = myself->getsig (sig);
2000-02-18 03:38:33 +08:00
* exceptions.cc (set_console_handler): Don't allocate console_handler_thread_waiter. It is obsolete. (ctrl_c_handler): Don't use console_handler_thread_waiter. * path.cc (hash_path_name): Fix handling of relative names. Make case insensitive. * path.h (suffix_info): Use initializers. * pinfo.h (_pinfo): Avoid initializers for null case. * resource.cc (fill_rusage): Zero rest of rusage structure. * security.cc (set_process_privileges): Don't reopen parent process. Just use hMainProc. * signal.cc (signal): Track when a signal handler has been used. (sigaction): Ditto. * sigproc.cc (pchildren): Use default initializer. (zombies): Ditto. (sigproc_terminate): Avoid closing handles that will be closed on exit anyway. (wait_sig): Send signal to "parent" on EXECing, not FORKing. (wait_subproc): Send SIGCHLD here rather than in proc_wait to avoid potential muto conflicts. * sigproc.h (sigthread): Don't initialize to zero. It's the default. * spawn.cc (spawn_guts): Fill in resources from exec parent prior to termination. * sync.h (muto): Don't initialize to zero. * syscalls.cc (close_all_files): Use one lock around entire loop and call fhandler close/release stuff directly. (_read): Don't use ready_for_read if there are not signal handlers active. * dcrt0.cc (dll_crt0_1): Fix display of "title". (do_exit): Use pinfo exit method to exit. (__api_fatal): Ditto. * exceptions.cc (signal_exit): Ditto. * fork.cc (fork_child): Remove debugging stuff. Use pinfo_fixup_after fork in place of exec_fixup_after_fork. * pinfo.cc (pinfo_fixup_after_fork): New method. (pinfo_fixup_in_spawned_child): Ditto. (_pinfo::exit): New method. (_pinfo::init): Remove recursion. Detect pathological case where pinfo structure already exists for new pid. * pinfo.h (_pinfo): Reorganize slightly. Add new method and new function declarations. * sigproc.cc (proc_exists): Previous simplification was a little to simple. Try harder to detect if a process exists. (proc_terminate): Use PID_EXITED setting to determine if process is still around. (WFSO): Remove debugging statement. (WFMO): Ditto. * spawn.cc (exec_fixup_after_fork): Eliminate. (spawn_guts): Always set old_title to NULL. Is it really needed? Move hexec_proc to pinfo.cc. Call pinfo_fixup_in_spawned_child to eliminate handle link after a spawn. * include/sys/cygwin.h: Remove PID_NOT_IN_USE. Add PID_EXITED.
2000-10-15 09:37:07 +08:00
if (newact)
2000-02-18 03:38:33 +08:00
{
if (sig == SIGKILL || sig == SIGSTOP)
2000-02-18 03:38:33 +08:00
{
set_errno (EINVAL);
return -1;
}
* exceptions.cc (set_console_handler): Don't allocate console_handler_thread_waiter. It is obsolete. (ctrl_c_handler): Don't use console_handler_thread_waiter. * path.cc (hash_path_name): Fix handling of relative names. Make case insensitive. * path.h (suffix_info): Use initializers. * pinfo.h (_pinfo): Avoid initializers for null case. * resource.cc (fill_rusage): Zero rest of rusage structure. * security.cc (set_process_privileges): Don't reopen parent process. Just use hMainProc. * signal.cc (signal): Track when a signal handler has been used. (sigaction): Ditto. * sigproc.cc (pchildren): Use default initializer. (zombies): Ditto. (sigproc_terminate): Avoid closing handles that will be closed on exit anyway. (wait_sig): Send signal to "parent" on EXECing, not FORKing. (wait_subproc): Send SIGCHLD here rather than in proc_wait to avoid potential muto conflicts. * sigproc.h (sigthread): Don't initialize to zero. It's the default. * spawn.cc (spawn_guts): Fill in resources from exec parent prior to termination. * sync.h (muto): Don't initialize to zero. * syscalls.cc (close_all_files): Use one lock around entire loop and call fhandler close/release stuff directly. (_read): Don't use ready_for_read if there are not signal handlers active. * dcrt0.cc (dll_crt0_1): Fix display of "title". (do_exit): Use pinfo exit method to exit. (__api_fatal): Ditto. * exceptions.cc (signal_exit): Ditto. * fork.cc (fork_child): Remove debugging stuff. Use pinfo_fixup_after fork in place of exec_fixup_after_fork. * pinfo.cc (pinfo_fixup_after_fork): New method. (pinfo_fixup_in_spawned_child): Ditto. (_pinfo::exit): New method. (_pinfo::init): Remove recursion. Detect pathological case where pinfo structure already exists for new pid. * pinfo.h (_pinfo): Reorganize slightly. Add new method and new function declarations. * sigproc.cc (proc_exists): Previous simplification was a little to simple. Try harder to detect if a process exists. (proc_terminate): Use PID_EXITED setting to determine if process is still around. (WFSO): Remove debugging statement. (WFMO): Ditto. * spawn.cc (exec_fixup_after_fork): Eliminate. (spawn_guts): Always set old_title to NULL. Is it really needed? Move hexec_proc to pinfo.cc. Call pinfo_fixup_in_spawned_child to eliminate handle link after a spawn. * include/sys/cygwin.h: Remove PID_NOT_IN_USE. Add PID_EXITED.
2000-10-15 09:37:07 +08:00
myself->getsig (sig) = *newact;
if (newact->sa_handler == SIG_IGN)
2000-02-18 03:38:33 +08:00
sig_clear (sig);
* exceptions.cc (set_console_handler): Don't allocate console_handler_thread_waiter. It is obsolete. (ctrl_c_handler): Don't use console_handler_thread_waiter. * path.cc (hash_path_name): Fix handling of relative names. Make case insensitive. * path.h (suffix_info): Use initializers. * pinfo.h (_pinfo): Avoid initializers for null case. * resource.cc (fill_rusage): Zero rest of rusage structure. * security.cc (set_process_privileges): Don't reopen parent process. Just use hMainProc. * signal.cc (signal): Track when a signal handler has been used. (sigaction): Ditto. * sigproc.cc (pchildren): Use default initializer. (zombies): Ditto. (sigproc_terminate): Avoid closing handles that will be closed on exit anyway. (wait_sig): Send signal to "parent" on EXECing, not FORKing. (wait_subproc): Send SIGCHLD here rather than in proc_wait to avoid potential muto conflicts. * sigproc.h (sigthread): Don't initialize to zero. It's the default. * spawn.cc (spawn_guts): Fill in resources from exec parent prior to termination. * sync.h (muto): Don't initialize to zero. * syscalls.cc (close_all_files): Use one lock around entire loop and call fhandler close/release stuff directly. (_read): Don't use ready_for_read if there are not signal handlers active. * dcrt0.cc (dll_crt0_1): Fix display of "title". (do_exit): Use pinfo exit method to exit. (__api_fatal): Ditto. * exceptions.cc (signal_exit): Ditto. * fork.cc (fork_child): Remove debugging stuff. Use pinfo_fixup_after fork in place of exec_fixup_after_fork. * pinfo.cc (pinfo_fixup_after_fork): New method. (pinfo_fixup_in_spawned_child): Ditto. (_pinfo::exit): New method. (_pinfo::init): Remove recursion. Detect pathological case where pinfo structure already exists for new pid. * pinfo.h (_pinfo): Reorganize slightly. Add new method and new function declarations. * sigproc.cc (proc_exists): Previous simplification was a little to simple. Try harder to detect if a process exists. (proc_terminate): Use PID_EXITED setting to determine if process is still around. (WFSO): Remove debugging statement. (WFMO): Ditto. * spawn.cc (exec_fixup_after_fork): Eliminate. (spawn_guts): Always set old_title to NULL. Is it really needed? Move hexec_proc to pinfo.cc. Call pinfo_fixup_in_spawned_child to eliminate handle link after a spawn. * include/sys/cygwin.h: Remove PID_NOT_IN_USE. Add PID_EXITED.
2000-10-15 09:37:07 +08:00
if (newact->sa_handler == SIG_DFL && sig == SIGCHLD)
2000-02-18 03:38:33 +08:00
sig_clear (sig);
set_sigcatchers (oa.sa_handler, newact->sa_handler);
2000-02-18 03:38:33 +08:00
}
* exceptions.cc (set_console_handler): Don't allocate console_handler_thread_waiter. It is obsolete. (ctrl_c_handler): Don't use console_handler_thread_waiter. * path.cc (hash_path_name): Fix handling of relative names. Make case insensitive. * path.h (suffix_info): Use initializers. * pinfo.h (_pinfo): Avoid initializers for null case. * resource.cc (fill_rusage): Zero rest of rusage structure. * security.cc (set_process_privileges): Don't reopen parent process. Just use hMainProc. * signal.cc (signal): Track when a signal handler has been used. (sigaction): Ditto. * sigproc.cc (pchildren): Use default initializer. (zombies): Ditto. (sigproc_terminate): Avoid closing handles that will be closed on exit anyway. (wait_sig): Send signal to "parent" on EXECing, not FORKing. (wait_subproc): Send SIGCHLD here rather than in proc_wait to avoid potential muto conflicts. * sigproc.h (sigthread): Don't initialize to zero. It's the default. * spawn.cc (spawn_guts): Fill in resources from exec parent prior to termination. * sync.h (muto): Don't initialize to zero. * syscalls.cc (close_all_files): Use one lock around entire loop and call fhandler close/release stuff directly. (_read): Don't use ready_for_read if there are not signal handlers active. * dcrt0.cc (dll_crt0_1): Fix display of "title". (do_exit): Use pinfo exit method to exit. (__api_fatal): Ditto. * exceptions.cc (signal_exit): Ditto. * fork.cc (fork_child): Remove debugging stuff. Use pinfo_fixup_after fork in place of exec_fixup_after_fork. * pinfo.cc (pinfo_fixup_after_fork): New method. (pinfo_fixup_in_spawned_child): Ditto. (_pinfo::exit): New method. (_pinfo::init): Remove recursion. Detect pathological case where pinfo structure already exists for new pid. * pinfo.h (_pinfo): Reorganize slightly. Add new method and new function declarations. * sigproc.cc (proc_exists): Previous simplification was a little to simple. Try harder to detect if a process exists. (proc_terminate): Use PID_EXITED setting to determine if process is still around. (WFSO): Remove debugging statement. (WFMO): Ditto. * spawn.cc (exec_fixup_after_fork): Eliminate. (spawn_guts): Always set old_title to NULL. Is it really needed? Move hexec_proc to pinfo.cc. Call pinfo_fixup_in_spawned_child to eliminate handle link after a spawn. * include/sys/cygwin.h: Remove PID_NOT_IN_USE. Add PID_EXITED.
2000-10-15 09:37:07 +08:00
if (oldact)
*oldact = oa;
2000-02-18 03:38:33 +08:00
return 0;
}
extern "C" int
2000-02-18 03:38:33 +08:00
sigaddset (sigset_t *set, const int sig)
{
/* check that sig is in right range */
if (sig <= 0 || sig >= NSIG)
{
set_errno (EINVAL);
syscall_printf ("SIG_ERR = sigaddset signal %d out of range", sig);
2000-02-18 03:38:33 +08:00
return -1;
}
*set |= SIGTOMASK (sig);
return 0;
}
extern "C" int
2000-02-18 03:38:33 +08:00
sigdelset (sigset_t *set, const int sig)
{
/* check that sig is in right range */
if (sig <= 0 || sig >= NSIG)
{
set_errno (EINVAL);
syscall_printf ("SIG_ERR = sigdelset signal %d out of range", sig);
2000-02-18 03:38:33 +08:00
return -1;
}
*set &= ~SIGTOMASK (sig);
return 0;
}
extern "C" int
2000-02-18 03:38:33 +08:00
sigismember (const sigset_t *set, int sig)
{
/* check that sig is in right range */
if (sig <= 0 || sig >= NSIG)
{
set_errno (EINVAL);
syscall_printf ("SIG_ERR = sigdelset signal %d out of range", sig);
2000-02-18 03:38:33 +08:00
return -1;
}
if (*set & SIGTOMASK (sig))
return 1;
else
return 0;
}
extern "C" int
2000-02-18 03:38:33 +08:00
sigemptyset (sigset_t *set)
{
*set = (sigset_t) 0;
return 0;
}
extern "C" int
2000-02-18 03:38:33 +08:00
sigfillset (sigset_t *set)
{
*set = ~((sigset_t) 0);
return 0;
}
extern "C" int
2000-02-18 03:38:33 +08:00
sigsuspend (const sigset_t *set)
{
return handle_sigsuspend (*set);
}
extern "C" int
2000-02-18 03:38:33 +08:00
sigpause (int signal_mask)
{
return handle_sigsuspend ((sigset_t) signal_mask);
}
extern "C" int
2000-02-18 03:38:33 +08:00
pause (void)
{
return handle_sigsuspend (myself->getsigmask ());
}
extern "C" int
siginterrupt (int sig, int flag)
{
struct sigaction act;
(void)sigaction(sig, NULL, &act);
if (flag)
act.sa_flags &= ~SA_RESTART;
else
act.sa_flags |= SA_RESTART;
return sigaction(sig, &act, NULL);
}