aux/trampoline patch

aux/trampoline patch

[Alex Musolino]

Hello,

The intent of this patch is to fix a couple quirks of aux/trampoline
that I don't particularly like.  Firstly, when running aux/trampoline
interactively, it can't be killed with DEL.  Secondly, deleting the
rio window it was invoked from leaves it running.

Thoughts?  Now that I think of it, perhaps the parent proc should
forward any notes it receives to its children...

diff -r d416b601a9df sys/src/cmd/aux/trampoline.c
--- a/sys/src/cmd/aux/trampoline.c	Thu Mar 26 18:24:39 2020 +1030
+++ b/sys/src/cmd/aux/trampoline.c	Fri Mar 27 12:29:43 2020 +1030
@@ -9,6 +9,8 @@
 	Maxpath=	128,
 };
 
+char notestr[] = "die yankee pig dog";
+
 typedef struct Endpoints Endpoints;
 struct Endpoints
 {
@@ -37,6 +39,7 @@
 main(int argc, char **argv)
 {
 	char *altaddr, *checkmac, *mac;
+	int c1, c2;
 	int fd, fd0, fd1;
 	void (*x)(int, int);
 	Endpoints *ep;
@@ -83,19 +86,27 @@
 	if(fd < 0)
 		sysfatal("dial %s: %r", argv[0]);
 
-	rfork(RFNOTEG);
-	switch(fork()){
+	switch(c1 = fork()){
 	case -1:
 		fprint(2, "%s: fork: %r\n", argv0);
 		exits("dial");
 	case 0:
 		(*x)(fd0, fd);
-		break;
-	default:
+		exits(0);
+	}
+
+	switch(c2 = fork()){
+	case -1:
+		fprint(2, "%s: fork: %r\n", argv0);
+		exits("dial");
+	case 0:
 		(*x)(fd, fd1);
-		break;
+		exits(0);
 	}
-	postnote(PNGROUP, getpid(), "die yankee pig dog");
+
+	waitpid();
+	postnote(PNPROC, c1, notestr);
+	postnote(PNPROC, c2, notestr);
 	exits(0);
 }
 
--
Cheers,
Alex Musolino