forked from pool/glibc
54 lines
1.6 KiB
Diff
54 lines
1.6 KiB
Diff
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Index: sysdeps/unix/sysv/linux/tcsetattr.c
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===================================================================
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RCS file: /cvs/glibc/libc/sysdeps/unix/sysv/linux/tcsetattr.c,v
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retrieving revision 1.14
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retrieving revision 1.13
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diff -u -r1.14 -r1.13
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--- sysdeps/unix/sysv/linux/tcsetattr.c 21 Feb 2003 00:09:04 -0000 1.14
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+++ sysdeps/unix/sysv/linux/tcsetattr.c 17 Feb 2003 19:48:44 -0000 1.13
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@@ -56,6 +56,7 @@
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{
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struct __kernel_termios k_termios;
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unsigned long int cmd;
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+ int retval;
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switch (optional_actions)
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{
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@@ -87,6 +88,35 @@
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memcpy (&k_termios.c_cc[0], &termios_p->c_cc[0],
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__KERNEL_NCCS * sizeof (cc_t));
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- return INLINE_SYSCALL (ioctl, 3, fd, cmd, &k_termios);
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+ retval = INLINE_SYSCALL (ioctl, 3, fd, cmd, &k_termios);
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+
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+ if (retval == 0 && cmd == TCSETS)
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+ {
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+ /* The Linux kernel has a bug which silently ignore the invalid
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+ c_cflag on pty. We have to check it here. */
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+ int save = errno;
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+ retval = INLINE_SYSCALL (ioctl, 3, fd, TCGETS, &k_termios);
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+ if (retval)
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+ {
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+ /* We cannot verify if the setting is ok. We don't return
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+ an error (?). */
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+ __set_errno (save);
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+ retval = 0;
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+ }
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+ else if ((termios_p->c_cflag & (PARENB | CREAD))
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+ != (k_termios.c_cflag & (PARENB | CREAD))
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+ || ((termios_p->c_cflag & CSIZE)
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+ && ((termios_p->c_cflag & CSIZE)
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+ != (k_termios.c_cflag & CSIZE))))
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+ {
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+ /* It looks like the Linux kernel silently changed the
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+ PARENB/CREAD/CSIZE bits in c_cflag. Report it as an
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+ error. */
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+ __set_errno (EINVAL);
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+ retval = -1;
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+ }
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+ }
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+
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+ return retval;
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}
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libc_hidden_def (tcsetattr)
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