Import sources from 2011-03-30 iso image

1 files changed, 101 insertions, 0 deletions

diff --git a/sys/src/cmd/aux/reboot.c b/sys/src/cmd/aux/reboot.c
new file mode 100755
index 000000000..653f0b3fc
--- /dev/null
+++ b/sys/src/cmd/aux/reboot.c
@@ -0,0 +1,101 @@
+#include <u.h>
+#include <libc.h>
+
+void
+reboot(void)
+{
+	int fd;
+	fd = open("/dev/reboot", OWRITE);
+	if(fd >= 0)
+		write(fd, "reboot", 6);
+	exits(0);
+}
+
+char*
+readenv(char *name, char *buf, int n)
+{
+	char *ans;
+	int f;
+	char ename[200];
+
+	ans = buf;
+	ename[0] = 0;
+	strcat(ename, "/env/");
+	strcat(ename, name);
+	f = open(ename, OREAD);
+	if(f < 0)
+		return 0;
+	n = read(f, ans, n-1);
+	if(n < 0)
+		ans = 0;
+	else
+		ans[n] = 0;
+	close(f);
+	return ans;
+}
+
+int alarmed;
+
+void
+ding(void*, char*msg)
+{
+	if(strstr(msg, "alarm")){
+		alarmed = 1;
+		noted(NCONT);
+	}
+	noted(NDFLT);
+}
+
+void
+main(int argc, char **argv)
+{
+	int fd;
+	char buf[256];
+	char file[128];
+	char *p;
+	Dir *d;
+
+	if(argc > 1)
+		strecpy(file, file+sizeof file, argv[1]);
+	else{
+		p = readenv("cputype", buf, sizeof buf);
+		if(p == 0)
+			exits(0);
+		file[0] = 0;
+		strcat(file, "/");
+		strcat(file, p);
+		strcat(file, "/lib");
+	}
+	if (access(file, AREAD) < 0)
+		sysfatal("%s not readable: %r", file);
+
+	switch(rfork(RFPROC|RFNOWAIT|RFNOTEG|RFCFDG)){
+	case 0:
+		break;
+	default:
+		exits(0);
+	}
+
+	notify(ding);
+	fd = open(file, OREAD);
+	if (fd < 0)
+		exits("no file");
+
+	//  the logic here is to make a request every 5 minutes.
+	//  If the request alarms out, that's OK, the file server
+	//  may just be busy.  If the request fails for any other
+	//  reason, it's probably because the connection went
+	//  away so reboot.
+	for(;;){
+		alarm(1000*60);
+		alarmed = 0;
+
+		d = dirfstat(fd);
+		free(d);
+		if(d == nil)
+			if(!alarmed)
+				reboot();
+		alarm(0);
+		sleep(60*1000*5);
+	}
+}