Subject:
Re: X11 works well
From:
Daniel R Risacher ####@####.####
Date:
4 Dec 1999 06:29:34 -0000
Message-Id: <m2wvqvp6pa.fsf@alum.mit.edu>
My sincere apologies for my previous message, which contained a patch
that wouldn't apply correctly. Somehow, in preparing the message, the
whitespace in the patch got garbled up. Mea culpa.
Here it is again. Hopefully more correct this time.
(Alert readers are warned that Greg's message may include a simpler
solution that I haven't tried yet..)
--- demos/microwin/mterm.c.old Fri Dec 3 07:03:39 1999
+++ demos/microwin/mterm.c Fri Dec 3 07:16:23 1999
@@ -248,15 +248,16 @@
char * argv[2];
again:
- sprintf(pty_name, "/dev/ptyp%d", n);
- if ((tfd = open(pty_name, O_RDWR | O_NONBLOCK)) < 0) {
- if ((errno == EBUSY) && (n < 3)) {
- ++n;
- goto again;
- }
- fprintf(stderr, "Can't create pty %s\n", pty_name);
+ if ((tfd = getpt())<0) {
+ fprintf(stderr, "Can't create master pty\n");
return -1;
}
+
+ if (grantpt(tfd))
+ perror("failure");
+ if (unlockpt(tfd))
+ perror("failure");
+
signal(SIGCHLD, ptysignaled);
signal(SIGINT, ptysignaled);
if ((pid = fork()) == -1) {
@@ -264,13 +265,13 @@
return -1;
}
if (!pid) {
+ ptsname_r(tfd, pty_name, 12);
close(STDIN_FILENO);
close(STDOUT_FILENO);
close(STDERR_FILENO);
close(tfd);
setsid();
- pty_name[5] = 't';
if ((tfd = open(pty_name, O_RDWR)) < 0) {
fprintf(stderr, "Child: Can't open pty %s\n", pty_name);
exit(1);
--- demos/nanox/nterm.c.old Fri Dec 3 07:03:39 1999
+++ demos/nanox/nterm.c Fri Dec 3 07:16:20 1999
@@ -162,15 +162,16 @@
pid_t pid;
again:
- sprintf(pty_name, "/dev/ptyp%d", n);
- if ((tfd = open(pty_name, O_RDWR | O_NONBLOCK)) < 0) {
- if ((errno == EBUSY || errno == EIO) && n < 10) {
- n++;
- goto again;
- }
- fprintf(stderr, "Can't create pty %s\n", pty_name);
+ if ((tfd = getpt())<0) {
+ fprintf(stderr, "Can't create master pty\n");
return -1;
}
+
+ if (grantpt(tfd))
+ perror("failure");
+ if (unlockpt(tfd))
+ perror("failure");
+
signal(SIGCHLD, sigchild);
signal(SIGINT, sigchild);
if ((pid = fork()) == -1) {
@@ -178,13 +179,13 @@
return -1;
}
if (!pid) {
+ ptsname_r(tfd, pty_name, 12);
close(STDIN_FILENO);
close(STDOUT_FILENO);
close(STDERR_FILENO);
close(tfd);
setsid();
- pty_name[5] = 't';
if ((tfd = open(pty_name, O_RDWR)) < 0) {
fprintf(stderr, "Child: Can't open pty %s\n", pty_name);
exit(1);
--
"So, shall we go act innocent now?"
Daniel Risacher ####@####.####
