import the plan 9 libraries libc (lib9) and libbio into the tree.

remove the dependency on /home/r.

SVN=122482

1 files changed, 179 insertions, 0 deletions

diff --git a/src/lib9/await.c b/src/lib9/await.c
new file mode 100644
index 000000000..90be598a1
--- /dev/null
+++ b/src/lib9/await.c
@@ -0,0 +1,179 @@
+/*
+Plan 9 from User Space src/lib9/await.c
+http://code.swtch.com/plan9port/src/tip/src/lib9/await.c
+
+Copyright 2001-2007 Russ Cox.  All Rights Reserved.
+Portions Copyright 2009 The Go Authors.  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.
+*/
+
+#define NOPLAN9DEFINES
+#include <u.h>
+#include <libc.h>
+
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+
+#ifndef WCOREDUMP	/* not on Mac OS X Tiger */
+#define WCOREDUMP(status) 0
+#endif
+
+static struct {
+	int sig;
+	char *str;
+} tab[] = {
+	SIGHUP,		"hangup",
+	SIGINT,		"interrupt",
+	SIGQUIT,		"quit",
+	SIGILL,		"sys: illegal instruction",
+	SIGTRAP,		"sys: breakpoint",
+	SIGABRT,		"sys: abort",
+#ifdef SIGEMT
+	SIGEMT,		"sys: emulate instruction executed",
+#endif
+	SIGFPE,		"sys: fp: trap",
+	SIGKILL,		"sys: kill",
+	SIGBUS,		"sys: bus error",
+	SIGSEGV,		"sys: segmentation violation",
+	SIGALRM,		"alarm",
+	SIGTERM,		"kill",
+	SIGURG,		"sys: urgent condition on socket",
+	SIGSTOP,		"sys: stop",
+	SIGTSTP,		"sys: tstp",
+	SIGCONT,		"sys: cont",
+	SIGCHLD,		"sys: child",
+	SIGTTIN,		"sys: ttin",
+	SIGTTOU,		"sys: ttou",
+#ifdef SIGIO	/* not on Mac OS X Tiger */
+	SIGIO,		"sys: i/o possible on fd",
+#endif
+	SIGXCPU,		"sys: cpu time limit exceeded",
+	SIGXFSZ,		"sys: file size limit exceeded",
+	SIGVTALRM,	"sys: virtual time alarm",
+	SIGPROF,		"sys: profiling timer alarm",
+#ifdef SIGWINCH	/* not on Mac OS X Tiger */
+	SIGWINCH,	"sys: window size change",
+#endif
+#ifdef SIGINFO
+	SIGINFO,		"sys: status request",
+#endif
+	SIGUSR1,		"sys: usr1",
+	SIGUSR2,		"sys: usr2",
+	SIGPIPE,		"sys: write on closed pipe",
+};
+
+char*
+_p9sigstr(int sig, char *tmp)
+{
+	int i;
+
+	for(i=0; i<nelem(tab); i++)
+		if(tab[i].sig == sig)
+			return tab[i].str;
+	if(tmp == nil)
+		return nil;
+	sprint(tmp, "sys: signal %d", sig);
+	return tmp;
+}
+
+int
+_p9strsig(char *s)
+{
+	int i;
+
+	for(i=0; i<nelem(tab); i++)
+		if(strcmp(s, tab[i].str) == 0)
+			return tab[i].sig;
+	return 0;
+}
+
+static Waitmsg*
+_wait(int pid4, int opt)
+{
+	int pid, status, cd;
+	struct rusage ru;
+	char tmp[64];
+	ulong u, s;
+	Waitmsg *w;
+
+	w = malloc(sizeof *w + 200);
+	if(w == nil)
+		return nil;
+	memset(w, 0, sizeof *w);
+	w->msg = (char*)&w[1];
+
+	for(;;){
+		/* On Linux, pid==-1 means anyone; on SunOS, it's pid==0. */
+		if(pid4 == -1)
+			pid = wait3(&status, opt, &ru);
+		else
+			pid = wait4(pid4, &status, opt, &ru);
+		if(pid <= 0) {
+			free(w);
+			return nil;
+		}
+		u = ru.ru_utime.tv_sec*1000+((ru.ru_utime.tv_usec+500)/1000);
+		s = ru.ru_stime.tv_sec*1000+((ru.ru_stime.tv_usec+500)/1000);
+		w->pid = pid;
+		w->time[0] = u;
+		w->time[1] = s;
+		w->time[2] = u+s;
+		if(WIFEXITED(status)){
+			if(status)
+				sprint(w->msg, "%d", status);
+			return w;
+		}
+		if(WIFSIGNALED(status)){
+			cd = WCOREDUMP(status);
+			sprint(w->msg, "signal: %s", _p9sigstr(WTERMSIG(status), tmp));
+			if(cd)
+				strcat(w->msg, " (core dumped)");
+			return w;
+		}
+	}
+}
+
+Waitmsg*
+p9wait(void)
+{
+	return _wait(-1, 0);
+}
+
+Waitmsg*
+p9waitfor(int pid)
+{
+	return _wait(pid, 0);
+}
+
+Waitmsg*
+p9waitnohang(void)
+{
+	return _wait(-1, WNOHANG);
+}
+
+int
+p9waitpid(void)
+{
+	int status;
+	return wait(&status);
+}