oexportfs: move legacy code for cpu and import to separate program

The initial protocol handling in exportfs for
cpu and import services is a huge mess.

Saparate the code out into its own program with
its own oexportfs(4) manpage.

1 files changed, 15 insertions, 30 deletions

diff --git a/sys/src/cmd/srvfs.c b/sys/src/cmd/srvfs.c
index d5c028150..a500c8ed2 100644
--- a/sys/src/cmd/srvfs.c
+++ b/sys/src/cmd/srvfs.c
@@ -12,7 +12,7 @@ void
 main(int argc, char **argv)
 {
 	char *ename, *arglist[16], **argp;
-	int n, fd, pipefd[2];
+	int fd, pipefd[2];
 	char buf[64];
 	int perm = 0600;
 
@@ -39,14 +39,27 @@ main(int argc, char **argv)
 		*argp++ = "-R";
 		 break;
 	}ARGEND
-	*argp = 0;
 	if(argc != 2)
 		usage();
+	*argp++ = "-r";
+	*argp++ = argv[1];
+	*argp = 0;
 
 	if(pipe(pipefd) < 0){
 		fprint(2, "can't pipe: %r\n");
 		exits("pipe");
 	}
+	if(argv[0][0] == '/')
+		strecpy(buf, buf+sizeof buf, argv[0]);
+	else
+		snprint(buf, sizeof buf, "/srv/%s", argv[0]);
+	fd = create(buf, OWRITE|ORCLOSE, perm);
+	if(fd < 0){
+		fprint(2, "can't create %s: %r\n", buf);
+		exits("create");
+	}
+	fprint(fd, "%d", pipefd[1]);
+	close(pipefd[1]);
 
 	switch(rfork(RFPROC|RFNOWAIT|RFNOTEG|RFFDG)){
 	case -1:
@@ -56,39 +69,11 @@ main(int argc, char **argv)
 		dup(pipefd[0], 0);
 		dup(pipefd[0], 1);
 		close(pipefd[0]);
-		close(pipefd[1]);
 		exec(ename, arglist);
 		fprint(2, "can't exec exportfs: %r\n");
 		exits("exec");
 	default:
 		break;
 	}
-	close(pipefd[0]);
-	if(fprint(pipefd[1], "%s", argv[1]) < 0){
-		fprint(2, "can't write pipe: %r\n");
-		exits("write");
-	}
-	n = read(pipefd[1], buf, sizeof buf-1);
-	if(n < 0){
-		fprint(2, "can't read pipe: %r\n");
-		exits("read");
-	}
-	buf[n] = 0;
-	if(n != 2 || strcmp(buf, "OK") != 0){
-		fprint(2, "not OK (%d): %s\n", n, buf);
-		exits("OK");
-	}
-	if(argv[0][0] == '/')
-		strecpy(buf, buf+sizeof buf, argv[0]);
-	else
-		snprint(buf, sizeof buf, "/srv/%s", argv[0]);
-	fd = create(buf, OWRITE, perm);
-	if(fd < 0){
-		fprint(2, "can't create %s: %r\n", buf);
-		exits("create");
-	}
-	fprint(fd, "%d", pipefd[1]);
-	close(fd);
-	close(pipefd[1]);
 	exits(0);
 }