28 lines
937 B
Diff
28 lines
937 B
Diff
Index: xen-4.18.0-testing/tools/console/client/main.c
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===================================================================
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--- xen-4.18.0-testing.orig/tools/console/client/main.c
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+++ xen-4.18.0-testing/tools/console/client/main.c
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@@ -101,6 +101,7 @@ static int get_pty_fd(struct xs_handle *
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* Assumes there is already a watch set in the store for this path. */
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{
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struct timeval tv;
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+ struct flock lock;
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fd_set watch_fdset;
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int xs_fd = xs_fileno(xs), pty_fd = -1;
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time_t start, now;
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@@ -124,6 +125,14 @@ static int get_pty_fd(struct xs_handle *
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pty_fd = open(pty_path, O_RDWR | O_NOCTTY);
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if (pty_fd == -1)
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warn("Could not open tty `%s'", pty_path);
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+ else {
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+ memset(&lock, 0, sizeof(lock));
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+ lock.l_type = F_WRLCK;
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+ lock.l_whence = SEEK_SET;
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+ if (fcntl(pty_fd, F_SETLK, &lock) != 0)
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+ err(errno, "Could not lock tty '%s'",
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+ pty_path);
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+ }
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}
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free(pty_path);
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}
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