43 lines
1.3 KiB
Diff
43 lines
1.3 KiB
Diff
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By default, with qemu version < 0.8.0 and with the command line
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qemu -monitor pty or -serial pty, local echo is
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enabled for the qemu side of the pty. This can result in infinite
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write/read loops and/or slowness of the simulation. Attached is a very
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small patch (against today's cvs) solving the problem. The 3 lines
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adjusting the tty fields could be replaced by "cfmakeraw(&tty)" if
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available on the host platform.
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-- David Decotigny (Dec 9 2005)
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Index: vl.c
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===================================================================
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RCS file: /cvsroot/qemu/qemu/vl.c,v
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retrieving revision 1.152
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diff -u -r1.152 vl.c
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--- vl.c 5 Dec 2005 20:31:52 -0000 1.152
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+++ vl.c 9 Dec 2005 15:07:46 -0000
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@@ -1396,6 +1396,7 @@
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#if defined(__linux__)
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CharDriverState *qemu_chr_open_pty(void)
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{
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+ struct termios tty;
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char slave_name[1024];
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int master_fd, slave_fd;
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@@ -1403,6 +1404,14 @@
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if (openpty(&master_fd, &slave_fd, slave_name, NULL, NULL) < 0) {
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return NULL;
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}
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+
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+ /* Disabling local echo and line-buffered output */
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+ tcgetattr (master_fd, &tty);
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+ tty.c_lflag &= ~(ECHO|ICANON|ISIG);
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+ tty.c_cc[VMIN] = 1;
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+ tty.c_cc[VTIME] = 0;
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+ tcsetattr (master_fd, TCSAFLUSH, &tty);
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+
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fprintf(stderr, "char device redirected to %s\n", slave_name);
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return qemu_chr_open_fd(master_fd, master_fd);
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}
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