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Date:: Sat May 7 22:41:59 2005 UTC
Message:: OS X Tiger changes
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  1 a0a331aa 2005-01-06 devnull #include <u.h>
  2 a0a331aa 2005-01-06 devnull #include <sys/time.h>
  3 a0a331aa 2005-01-06 devnull #include <sys/resource.h>
  4 ddb664da 2004-12-28 devnull #include "threadimpl.h"
  5 ddb664da 2004-12-28 devnull 
  6 230ead2f 2005-01-04 devnull #undef waitpid
  7 ddb664da 2004-12-28 devnull #undef pipe
  8 ddb664da 2004-12-28 devnull #undef wait
  9 ddb664da 2004-12-28 devnull 
 10 ddb664da 2004-12-28 devnull static int sigpid;
 11 ddb664da 2004-12-28 devnull static int threadpassfd;
 12 e9dbe11d 2005-01-11 devnull static int gotsigchld;
 13 ddb664da 2004-12-28 devnull 
 14 ddb664da 2004-12-28 devnull static void
 15 ddb664da 2004-12-28 devnull child(void)
 16 ddb664da 2004-12-28 devnull {
 17 1d2533d0 2004-12-28 devnull 	int status, pid;
 18 a0a331aa 2005-01-06 devnull 	struct rlimit rl;
 19 230ead2f 2005-01-04 devnull 
 20 230ead2f 2005-01-04 devnull 	notedisable("sys: child");
 21 230ead2f 2005-01-04 devnull 	pid = waitpid(sigpid, &status, 0);
 22 230ead2f 2005-01-04 devnull 	if(pid < 0){
 23 230ead2f 2005-01-04 devnull 		fprint(2, "%s: wait: %r\n", argv0);
 24 230ead2f 2005-01-04 devnull 		_exit(97);
 25 230ead2f 2005-01-04 devnull 	}
 26 230ead2f 2005-01-04 devnull 	if(WIFEXITED(status))
 27 1d2533d0 2004-12-28 devnull 		 _exit(WEXITSTATUS(status));
 28 230ead2f 2005-01-04 devnull 	if(WIFSIGNALED(status)){
 29 a0a331aa 2005-01-06 devnull 		/*
 30 a0a331aa 2005-01-06 devnull 		 * Make sure we don't scribble over the nice
 31 a0a331aa 2005-01-06 devnull 		 * core file that our child just wrote out.
 32 a0a331aa 2005-01-06 devnull 		 */
 33 a0a331aa 2005-01-06 devnull 		rl.rlim_cur = 0;
 34 a0a331aa 2005-01-06 devnull 		rl.rlim_max = 0;
 35 a0a331aa 2005-01-06 devnull 		setrlimit(RLIMIT_CORE, &rl);
 36 a0a331aa 2005-01-06 devnull 
 37 230ead2f 2005-01-04 devnull 		signal(WTERMSIG(status), SIG_DFL);
 38 230ead2f 2005-01-04 devnull 		raise(WTERMSIG(status));
 39 230ead2f 2005-01-04 devnull 		_exit(98);	/* not reached */
 40 230ead2f 2005-01-04 devnull 	}
 41 37cc72d3 2005-01-11 devnull 	if(WIFSTOPPED(status)){
 42 37cc72d3 2005-01-11 devnull 		fprint(2, "%s: wait pid %d stopped\n", argv0, pid);
 43 37cc72d3 2005-01-11 devnull 		return;
 44 37cc72d3 2005-01-11 devnull 	}
 45 c8b6342d 2005-01-13 devnull #ifdef WIFCONTINUED
 46 37cc72d3 2005-01-11 devnull 	if(WIFCONTINUED(status)){
 47 37cc72d3 2005-01-11 devnull 		fprint(2, "%s: wait pid %d continued\n", argv0, pid);
 48 37cc72d3 2005-01-11 devnull 		return;
 49 37cc72d3 2005-01-11 devnull 	}
 50 c8b6342d 2005-01-13 devnull #endif
 51 37cc72d3 2005-01-11 devnull 	fprint(2, "%s: wait pid %d status 0x%ux\n", argv0, pid, status);
 52 230ead2f 2005-01-04 devnull 	_exit(99);
 53 ddb664da 2004-12-28 devnull }
 54 ddb664da 2004-12-28 devnull 
 55 ddb664da 2004-12-28 devnull static void
 56 ddb664da 2004-12-28 devnull sigpass(int sig)
 57 ddb664da 2004-12-28 devnull {
 58 e9dbe11d 2005-01-11 devnull 	if(sigpid == 1){
 59 e9dbe11d 2005-01-11 devnull 		gotsigchld = 1;
 60 e9dbe11d 2005-01-11 devnull 		return;
 61 e9dbe11d 2005-01-11 devnull 	}
 62 e9dbe11d 2005-01-11 devnull 
 63 ddb664da 2004-12-28 devnull 	if(sig == SIGCHLD)
 64 ddb664da 2004-12-28 devnull 		child();
 65 ddb664da 2004-12-28 devnull 	else
 66 ddb664da 2004-12-28 devnull 		kill(sigpid, sig);
 67 ddb664da 2004-12-28 devnull }
 68 ddb664da 2004-12-28 devnull 
 69 e9dbe11d 2005-01-11 devnull static int sigs[] = 
 70 e9dbe11d 2005-01-11 devnull {
 71 e9dbe11d 2005-01-11 devnull 	SIGHUP, SIGINT, SIGQUIT, SIGILL,
 72 e9dbe11d 2005-01-11 devnull 	SIGTRAP, SIGABRT, SIGBUS, SIGFPE,
 73 e9dbe11d 2005-01-11 devnull 	SIGUSR1, SIGSEGV, SIGUSR2, SIGPIPE,
 74 e9dbe11d 2005-01-11 devnull 	SIGALRM, SIGTERM, SIGCHLD, SIGSTOP,
 75 72f4d44f 2005-03-18 devnull 	/*SIGTSTP, SIGTTIN, SIGTTOU,*/ SIGURG, 
 76 e9dbe11d 2005-01-11 devnull 	SIGXCPU, SIGXFSZ, SIGVTALRM, SIGPROF,
 77 bc7da029 2005-05-07 devnull #ifdef SIGWINCH
 78 bc7da029 2005-05-07 devnull 	SIGWINCH,
 79 bc7da029 2005-05-07 devnull #endif
 80 bc7da029 2005-05-07 devnull #ifdef SIGIO
 81 bc7da029 2005-05-07 devnull 	SIGIO,
 82 bc7da029 2005-05-07 devnull #endif
 83 1ac19816 2005-01-14 devnull #ifdef SIGEMT
 84 1ac19816 2005-01-14 devnull 	SIGEMT,
 85 1ac19816 2005-01-14 devnull #endif
 86 1ac19816 2005-01-14 devnull #ifdef SIGPWR
 87 1ac19816 2005-01-14 devnull 	SIGPWR, 
 88 1ac19816 2005-01-14 devnull #endif
 89 1ac19816 2005-01-14 devnull #ifdef SIGINFO
 90 1ac19816 2005-01-14 devnull 	SIGINFO,
 91 1ac19816 2005-01-14 devnull #endif
 92 1ac19816 2005-01-14 devnull 	SIGSYS
 93 e9dbe11d 2005-01-11 devnull };
 94 e9dbe11d 2005-01-11 devnull 
 95 ddb664da 2004-12-28 devnull void
 96 ddb664da 2004-12-28 devnull _threadsetupdaemonize(void)
 97 ddb664da 2004-12-28 devnull {
 98 ddb664da 2004-12-28 devnull 	int i, n, pid;
 99 ddb664da 2004-12-28 devnull 	int p[2];
100 ddb664da 2004-12-28 devnull 	char buf[20];
101 ddb664da 2004-12-28 devnull 
102 ddb664da 2004-12-28 devnull 	sigpid = 1;
103 ddb664da 2004-12-28 devnull 
104 ddb664da 2004-12-28 devnull 	if(pipe(p) < 0)
105 ddb664da 2004-12-28 devnull 		sysfatal("passer pipe: %r");
106 ddb664da 2004-12-28 devnull 
107 ddb664da 2004-12-28 devnull 	/* hide these somewhere they won't cause harm */
108 a0d2173c 2005-01-16 devnull 	/* can't go too high: NetBSD max is 64, for example */
109 a0d2173c 2005-01-16 devnull 	if(dup(p[0], 28) < 0 || dup(p[1], 29) < 0)
110 ddb664da 2004-12-28 devnull 		sysfatal("passer pipe dup: %r");
111 ddb664da 2004-12-28 devnull 	close(p[0]);
112 ddb664da 2004-12-28 devnull 	close(p[1]);
113 a0d2173c 2005-01-16 devnull 	p[0] = 28;
114 a0d2173c 2005-01-16 devnull 	p[1] = 29;
115 ddb664da 2004-12-28 devnull 
116 ddb664da 2004-12-28 devnull 	/* close on exec */
117 ddb664da 2004-12-28 devnull 	if(fcntl(p[0], F_SETFD, 1) < 0 || fcntl(p[1], F_SETFD, 1) < 0)
118 ddb664da 2004-12-28 devnull 		sysfatal("passer pipe pipe fcntl: %r");
119 ddb664da 2004-12-28 devnull 
120 230ead2f 2005-01-04 devnull 	noteenable("sys: child");
121 1d2533d0 2004-12-28 devnull 	signal(SIGCHLD, sigpass);
122 ddb664da 2004-12-28 devnull 	switch(pid = fork()){
123 ddb664da 2004-12-28 devnull 	case -1:
124 ddb664da 2004-12-28 devnull 		sysfatal("passer fork: %r");
125 ddb664da 2004-12-28 devnull 	default:
126 ddb664da 2004-12-28 devnull 		close(p[1]);
127 ddb664da 2004-12-28 devnull 		break;
128 ddb664da 2004-12-28 devnull 	case 0:
129 230ead2f 2005-01-04 devnull 		notedisable("sys: child");
130 1d2533d0 2004-12-28 devnull 		signal(SIGCHLD, SIG_DFL);
131 e9dbe11d 2005-01-11 devnull 	/*	rfork(RFNOTEG); */
132 ddb664da 2004-12-28 devnull 		close(p[0]);
133 ddb664da 2004-12-28 devnull 		threadpassfd = p[1];
134 ddb664da 2004-12-28 devnull 		return;
135 ddb664da 2004-12-28 devnull 	}
136 ddb664da 2004-12-28 devnull 
137 ddb664da 2004-12-28 devnull 	sigpid = pid;
138 e9dbe11d 2005-01-11 devnull 	if(gotsigchld)
139 e9dbe11d 2005-01-11 devnull 		sigpass(SIGCHLD);
140 e9dbe11d 2005-01-11 devnull 
141 e9dbe11d 2005-01-11 devnull 	for(i=0; i<nelem(sigs); i++){
142 ddb664da 2004-12-28 devnull 		struct sigaction sa;
143 ddb664da 2004-12-28 devnull 
144 ddb664da 2004-12-28 devnull 		memset(&sa, 0, sizeof sa);
145 ddb664da 2004-12-28 devnull 		sa.sa_handler = sigpass;
146 ddb664da 2004-12-28 devnull 		sa.sa_flags |= SA_RESTART;
147 e9dbe11d 2005-01-11 devnull 		sigaction(sigs[i], &sa, nil);
148 ddb664da 2004-12-28 devnull 	}
149 ddb664da 2004-12-28 devnull 
150 ddb664da 2004-12-28 devnull 	for(;;){
151 ddb664da 2004-12-28 devnull 		n = read(p[0], buf, sizeof buf-1);
152 230ead2f 2005-01-04 devnull 		if(n == 0){	/* program exited */
153 ddb664da 2004-12-28 devnull 			child();
154 230ead2f 2005-01-04 devnull 		}
155 ddb664da 2004-12-28 devnull 		if(n > 0)
156 ddb664da 2004-12-28 devnull 			break;
157 d54ead7f 2004-12-28 devnull 		print("passer read: %r\n");
158 ddb664da 2004-12-28 devnull 	}
159 ddb664da 2004-12-28 devnull 	buf[n] = 0;
160 ddb664da 2004-12-28 devnull 	_exit(atoi(buf));
161 ddb664da 2004-12-28 devnull }
162 ddb664da 2004-12-28 devnull 
163 ddb664da 2004-12-28 devnull void
164 230ead2f 2005-01-04 devnull _threaddaemonize(void)
165 ddb664da 2004-12-28 devnull {
166 1d2533d0 2004-12-28 devnull 	if(threadpassfd >= 0){
167 1d2533d0 2004-12-28 devnull 		write(threadpassfd, "0", 1);
168 1d2533d0 2004-12-28 devnull 		close(threadpassfd);
169 1d2533d0 2004-12-28 devnull 		threadpassfd = -1;
170 1d2533d0 2004-12-28 devnull 	}
171 ddb664da 2004-12-28 devnull }