1 files changed, 0 insertions, 297 deletions
diff --git a/src/lib9/notify.c b/src/lib9/notify.c
deleted file mode 100644
index 84999b887..000000000
--- a/src/lib9/notify.c
+++ /dev/null
@@ -1,297 +0,0 @@
-/*
-Plan 9 from User Space src/lib9/notify.c
-http://code.swtch.com/plan9port/src/tip/src/lib9/notify.c
-
-Copyright 2001-2007 Russ Cox.  All Rights Reserved.
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
-*/
-
-/*
- * Signal handling for Plan 9 programs.
- * We stubbornly use the strings from Plan 9 instead
- * of the enumerated Unix constants.
- * There are some weird translations.  In particular,
- * a "kill" note is the same as SIGTERM in Unix.
- * There is no equivalent note to Unix's SIGKILL, since
- * it's not a deliverable signal anyway.
- *
- * We do not handle SIGABRT or SIGSEGV, mainly because
- * the thread library queues its notes for later, and we want
- * to dump core with the state at time of delivery.
- *
- * We have to add some extra entry points to provide the
- * ability to tweak which signals are deliverable and which
- * are acted upon.  Notifydisable and notifyenable play with
- * the process signal mask.  Notifyignore enables the signal
- * but will not call notifyf when it comes in.  This is occasionally
- * useful.
- */
-
-#include <u.h>
-#include <signal.h>
-#define NOPLAN9DEFINES
-#include <libc.h>
-
-extern char *_p9sigstr(int, char*);
-extern int _p9strsig(char*);
-
-typedef struct Sig Sig;
-struct Sig
-{
-	int sig;			/* signal number */
-	int flags;
-};
-
-enum
-{
-	Restart = 1<<0,
-	Ignore = 1<<1
-};
-
-static Sig sigs[] = {
-	SIGHUP,		0,
-	SIGINT,		0,
-	SIGQUIT,		0,
-	SIGILL,		0,
-	SIGTRAP,		0,
-/*	SIGABRT, 		0, 	*/
-#ifdef SIGEMT
-	SIGEMT,		0,
-#endif
-	SIGFPE,		0,
-	SIGBUS,		0,
-/*	SIGSEGV, 		0, 	*/
-	SIGCHLD,		Restart|Ignore,
-	SIGSYS,		0,
-	SIGPIPE,		Ignore,
-	SIGALRM,		0,
-	SIGTERM,		0,
-	SIGTSTP,		Restart|Ignore,
-/*	SIGTTIN,		Restart|Ignore, */
-/*	SIGTTOU,		Restart|Ignore, */
-	SIGXCPU,		0,
-	SIGXFSZ,		0,
-	SIGVTALRM,	0,
-	SIGUSR1,		0,
-	SIGUSR2,		0,
-#ifdef SIGWINCH
-	SIGWINCH,	Restart|Ignore,
-#endif
-#ifdef SIGINFO
-	SIGINFO,		Restart|Ignore,
-#endif
-};
-
-static Sig*
-findsig(int s)
-{
-	int i;
-
-	for(i=0; i<nelem(sigs); i++)
-		if(sigs[i].sig == s)
-			return &sigs[i];
-	return nil;
-}
-
-/*
- * The thread library initializes _notejmpbuf to its own
- * routine which provides a per-pthread jump buffer.
- * If we're not using the thread library, we assume we are
- * single-threaded.
- */
-typedef struct Jmp Jmp;
-struct Jmp
-{
-	p9jmp_buf b;
-};
-
-static Jmp onejmp;
-
-static Jmp*
-getonejmp(void)
-{
-	return &onejmp;
-}
-
-Jmp *(*_notejmpbuf)(void) = getonejmp;
-static void noteinit(void);
-
-/*
- * Actual signal handler.
- */
-
-static void (*notifyf)(void*, char*);	/* Plan 9 handler */
-
-static void
-signotify(int sig)
-{
-	char tmp[64];
-	Jmp *j;
-	Sig *s;
-
-	j = (*_notejmpbuf)();
-	switch(p9setjmp(j->b)){
-	case 0:
-		if(notifyf)
-			(*notifyf)(nil, _p9sigstr(sig, tmp));
-		/* fall through */
-	case 1:	/* noted(NDFLT) */
-		if(0)print("DEFAULT %d\n", sig);
-		s = findsig(sig);
-		if(s && (s->flags&Ignore))
-			return;
-		signal(sig, SIG_DFL);
-		raise(sig);
-		_exit(1);
-	case 2:	/* noted(NCONT) */
-		if(0)print("HANDLED %d\n", sig);
-		return;
-	}
-}
-
-static void
-signonotify(int sig)
-{
-	USED(sig);
-}
-
-int
-noted(int v)
-{
-	p9longjmp((*_notejmpbuf)()->b, v==NCONT ? 2 : 1);
-	abort();
-	return 0;
-}
-
-int
-notify(void (*f)(void*, char*))
-{
-	static int init;
-
-	notifyf = f;
-	if(!init){
-		init = 1;
-		noteinit();
-	}
-	return 0;
-}
-
-/*
- * Nonsense about enabling and disabling signals.
- */
-typedef void Sighandler(int);
-static Sighandler*
-handler(int s)
-{
-	struct sigaction sa;
-
-	sigaction(s, nil, &sa);
-	return sa.sa_handler;
-}
-
-static int
-notesetenable(int sig, int enabled)
-{
-	sigset_t mask, omask;
-
-	if(sig == 0)
-		return -1;
-
-	sigemptyset(&mask);
-	sigaddset(&mask, sig);
-	sigprocmask(enabled ? SIG_UNBLOCK : SIG_BLOCK, &mask, &omask);
-	return !sigismember(&omask, sig);
-}
-
-int
-noteenable(char *msg)
-{
-	return notesetenable(_p9strsig(msg), 1);
-}
-
-int
-notedisable(char *msg)
-{
-	return notesetenable(_p9strsig(msg), 0);
-}
-
-static int
-notifyseton(int s, int on)
-{
-	Sig *sig;
-	struct sigaction sa, osa;
-
-	sig = findsig(s);
-	if(sig == nil)
-		return -1;
-	memset(&sa, 0, sizeof sa);
-	sa.sa_handler = on ? signotify : signonotify;
-	if(sig->flags&Restart)
-		sa.sa_flags |= SA_RESTART;
-
-	/*
-	 * We can't allow signals within signals because there's
-	 * only one jump buffer.
-	 */
-	sigfillset(&sa.sa_mask);
-
-	/*
-	 * Install handler.
-	 */
-	sigaction(sig->sig, &sa, &osa);
-	return osa.sa_handler == signotify;
-}
-
-int
-notifyon(char *msg)
-{
-	return notifyseton(_p9strsig(msg), 1);
-}
-
-int
-notifyoff(char *msg)
-{
-	return notifyseton(_p9strsig(msg), 0);
-}
-
-/*
- * Initialization follows sigs table.
- */
-static void
-noteinit(void)
-{
-	int i;
-	Sig *sig;
-
-	for(i=0; i<nelem(sigs); i++){
-		sig = &sigs[i];
-		/*
-		 * If someone has already installed a handler,
-		 * It's probably some ld preload nonsense,
-		 * like pct (a SIGVTALRM-based profiler).
-		 * Or maybe someone has already called notifyon/notifyoff.
-		 * Leave it alone.
-		 */
-		if(handler(sig->sig) != SIG_DFL)
-			continue;
-		notifyseton(sig->sig, 1);
-	}
-}
-