diff options
Diffstat (limited to 'winsup/cygwin/signal.cc')
| -rw-r--r-- | winsup/cygwin/signal.cc | 551 |
1 files changed, 0 insertions, 551 deletions
diff --git a/winsup/cygwin/signal.cc b/winsup/cygwin/signal.cc deleted file mode 100644 index bd75dff32..000000000 --- a/winsup/cygwin/signal.cc +++ /dev/null @@ -1,551 +0,0 @@ -/* signal.cc - - Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Red Hat, Inc. - - 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 "pinfo.h" -#include "sigproc.h" -#include "hires.h" -#include "security.h" -#include "cygtls.h" - -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 -signal (int sig, _sig_func_ptr func) -{ - sig_dispatch_pending (); - _sig_func_ptr prev; - - /* check that sig is in right range */ - if (sig < 0 || sig >= NSIG || sig == SIGKILL || sig == SIGSTOP) - { - set_errno (EINVAL); - syscall_printf ("SIG_ERR = signal (%d, %p)", sig, func); - return (_sig_func_ptr) SIG_ERR; - } - - prev = global_sigs[sig].sa_handler; - global_sigs[sig].sa_handler = func; - global_sigs[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. */ - global_sigs[sig].sa_flags |= SA_RESTART; - set_sigcatchers (prev, func); - - syscall_printf ("%p = signal (%d, %p)", prev, sig, func); - return prev; -} - -extern "C" int -nanosleep (const struct timespec *rqtp, struct timespec *rmtp) -{ - int res = 0; - sig_dispatch_pending (); - pthread_testcancel (); - - if ((unsigned int) rqtp->tv_sec > (HIRES_DELAY_MAX / 1000 - 1) - || (unsigned int) rqtp->tv_nsec > 999999999) - { - set_errno (EINVAL); - return -1; - } - DWORD resolution = gtod.resolution (); - DWORD req = ((rqtp->tv_sec * 1000 + (rqtp->tv_nsec + 999999) / 1000000 - + resolution - 1) / resolution) * resolution; - DWORD end_time = gtod.dmsecs () + req; - syscall_printf ("nanosleep (%ld)", req); - - int rc = pthread::cancelable_wait (signal_arrived, req); - DWORD rem; - if ((rem = end_time - gtod.dmsecs ()) > HIRES_DELAY_MAX) - rem = 0; - if (rc == WAIT_OBJECT_0) - { - (void) _my_tls.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; -} - -extern "C" unsigned int -sleep (unsigned int seconds) -{ - struct timespec req, rem; - req.tv_sec = seconds; - req.tv_nsec = 0; - nanosleep (&req, &rem); - return rem.tv_sec + (rem.tv_nsec > 0); -} - -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; -} - -extern "C" int -sigprocmask (int sig, const sigset_t *set, sigset_t *oldset) -{ - return handle_sigprocmask (sig, set, oldset, myself->getsigmask ()); -} - -int __stdcall -handle_sigprocmask (int sig, const sigset_t *set, sigset_t *oldset, sigset_t& opmask) -{ - sig_dispatch_pending (); - /* check that sig is in right range */ - if (sig < 0 || sig >= NSIG) - { - set_errno (EINVAL); - syscall_printf ("signal %d out of range", sig); - return -1; - } - - if (oldset) - { - if (check_null_invalid_struct_errno (oldset)) - return -1; - *oldset = opmask; - } - - if (set) - { - if (check_invalid_read_struct_errno (set)) - return -1; - sigset_t newmask = opmask; - 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_signal_mask (newmask, opmask); - } - return 0; -} - -static int -kill_worker (pid_t pid, siginfo_t& si) -{ - sig_dispatch_pending (); - - int res = 0; - pinfo dest (pid); - bool sendSIGCONT; - - if (!dest) - { - set_errno (ESRCH); - return -1; - } - - if ((sendSIGCONT = (si.si_signo < 0))) - si.si_signo = -si.si_signo; - - DWORD process_state = dest->process_state; - if (si.si_signo == 0) - { - res = proc_exists (dest) ? 0 : -1; - if (res < 0) - set_errno (ESRCH); - } - else if ((res = sig_send (dest, si))) - { - sigproc_printf ("%d = sig_send, %E ", res); - res = -1; - } - else if (sendSIGCONT) - { - siginfo_t si2; - si2.si_signo = SIGCONT; - si2.si_code = SI_KERNEL; - si2.si_pid = si2.si_uid = si2.si_errno = 0; - (void) sig_send (dest, si2); - } - - syscall_printf ("%d = kill_worker (%d, %d), process_state %p", res, pid, - si.si_signo, process_state); - return res; -} - -int -raise (int sig) -{ - return kill (myself->pid, sig); -} - -static int -kill0 (pid_t pid, siginfo_t& si) -{ - syscall_printf ("kill (%d, %d)", pid, si.si_signo); - /* check that sig is in right range */ - if (si.si_signo < 0 || si.si_signo >= NSIG) - { - set_errno (EINVAL); - syscall_printf ("signal %d out of range", si.si_signo); - return -1; - } - - /* Silently ignore stop signals from a member of orphaned process group. - FIXME: Why??? */ - if (ISSTATE (myself, PID_ORPHANED) && - (si.si_signo == SIGTSTP || si.si_signo == SIGTTIN || si.si_signo == SIGTTOU)) - si.si_signo = 0; - - return (pid > 0) ? kill_worker (pid, si) : kill_pgrp (-pid, si); -} - -int -killsys (pid_t pid, int sig) -{ - siginfo_t si; - si.si_signo = sig; - si.si_code = SI_KERNEL; - si.si_pid = si.si_uid = si.si_errno = 0; - return kill0 (pid, si); -} -int -kill (pid_t pid, int sig) -{ - siginfo_t si; - si.si_signo = sig; - si.si_code = SI_USER; - si.si_pid = si.si_uid = si.si_errno = 0; - return kill0 (pid, si); -} - -int -kill_pgrp (pid_t pid, siginfo_t& si) -{ - int res = 0; - int found = 0; - int killself = 0; - - sigproc_printf ("pid %d, signal %d", pid, si.si_signo); - - winpids pids ((DWORD) PID_MAP_RW); - for (unsigned i = 0; i < pids.npids; i++) - { - _pinfo *p = pids[i]; - - 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) || - (si.si_signo < 0 && NOTSTATE (p, PID_STOPPED))) - continue; - 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, si)) - res = -1; - found++; - } - - if (killself && !exit_state && kill_worker (myself->pid, si)) - res = -1; - - if (!found) - { - set_errno (ESRCH); - res = -1; - } - syscall_printf ("%d = kill (%d, %d)", res, pid, si.si_signo); - return res; -} - -extern "C" int -killpg (pid_t pgrp, int sig) -{ - return kill (-pgrp, sig); -} - -extern "C" void -abort (void) -{ - sig_dispatch_pending (); - /* 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_signal_mask (sig_mask); - - raise (SIGABRT); - (void) _my_tls.call_signal_handler (); /* Call any signal handler */ - do_exit (1); /* signal handler didn't exit. Goodbye. */ -} - -extern "C" int -sigaction (int sig, const struct sigaction *newact, struct sigaction *oldact) -{ - sig_dispatch_pending (); - /* check that sig is in right range */ - if (sig < 0 || sig >= NSIG) - { - set_errno (EINVAL); - sigproc_printf ("signal %d, newact %p, oldact %p", sig, newact, oldact); - syscall_printf ("SIG_ERR = sigaction signal %d out of range", sig); - return -1; - } - - struct sigaction oa = global_sigs[sig]; - - if (newact) - sigproc_printf ("signal %d, newact %p (handler %p), oa %p", sig, newact, newact->sa_handler, oa, oa.sa_handler); - else - sigproc_printf ("signal %d, newact %p, oa %p", sig, newact, oa, oa.sa_handler); - - if (newact) - { - if (sig == SIGKILL || sig == SIGSTOP) - { - set_errno (EINVAL); - return -1; - } - global_sigs[sig] = *newact; - if (newact->sa_handler == SIG_IGN) - sig_clear (sig); - if (newact->sa_handler == SIG_DFL && sig == SIGCHLD) - sig_clear (sig); - set_sigcatchers (oa.sa_handler, newact->sa_handler); - if (sig == SIGCHLD) - { - myself->process_state &= ~PID_NOCLDSTOP; - if (newact->sa_flags & SA_NOCLDSTOP) - myself->process_state |= PID_NOCLDSTOP; - } - } - - if (oldact) - *oldact = oa; - - return 0; -} - -extern "C" int -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); - return -1; - } - - *set |= SIGTOMASK (sig); - return 0; -} - -extern "C" int -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); - return -1; - } - - *set &= ~SIGTOMASK (sig); - return 0; -} - -extern "C" int -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); - return -1; - } - - if (*set & SIGTOMASK (sig)) - return 1; - else - return 0; -} - -extern "C" int -sigemptyset (sigset_t *set) -{ - *set = (sigset_t) 0; - return 0; -} - -extern "C" int -sigfillset (sigset_t *set) -{ - *set = ~((sigset_t) 0); - return 0; -} - -extern "C" int -sigsuspend (const sigset_t *set) -{ - return handle_sigsuspend (*set); -} - -extern "C" int -sigpause (int signal_mask) -{ - return handle_sigsuspend ((sigset_t) signal_mask); -} - -extern "C" int -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); -} - -extern "C" int -sigwait (const sigset_t *set, int *sig_ptr) -{ - int sig = sigwaitinfo (set, NULL); - if (sig > 0) - *sig_ptr = sig; - return sig > 0 ? 0 : -1; -} - -extern "C" int -sigwaitinfo (const sigset_t *set, siginfo_t *info) -{ - pthread_testcancel (); - HANDLE h; - h = _my_tls.event = CreateEvent (&sec_none_nih, FALSE, FALSE, NULL); - if (!h) - { - __seterrno (); - return -1; - } - - _my_tls.sigwait_mask = *set; - sig_dispatch_pending (true); - - int res; - switch (WaitForSingleObject (h, INFINITE)) - { - case WAIT_OBJECT_0: - if (!sigismember (set, _my_tls.infodata.si_signo)) - { - set_errno (EINTR); - res = -1; - } - else - { - if (info) - *info = _my_tls.infodata; - res = _my_tls.infodata.si_signo; - InterlockedExchange ((LONG *) &_my_tls.sig, (LONG) 0); - } - break; - default: - __seterrno (); - res = -1; - } - CloseHandle (h); - sigproc_printf ("returning sig %d", res); - return res; -} - -extern "C" int -sigqueue (pid_t pid, int sig, const union sigval value) -{ - siginfo_t si; - pinfo dest (pid); - if (!dest) - { - set_errno (ESRCH); - return -1; - } - si.si_signo = sig; - si.si_code = SI_USER; - si.si_pid = si.si_uid = si.si_errno = 0; - si.si_value = value; - return sig_send (dest, si); -} |