[PATCH] ioctl_tty.2: Fix information about header include file

["Pali Rohár" <pali@kernel.org>]

Header file termios.h contains incompatible definitions for linux ioctl
calls. Correct definitions are exported by header file linux/termios.h but
this file conflicts with sys/ioctl.h header file (required for ioctl()
call). Therefore include direct asm header file asm/termbits.h which
contains compatible definitions and structures for ioctl calls.

Signed-off-by: Pali Rohár <pali@kernel.org>
---
 man2/ioctl_tty.2 | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/man2/ioctl_tty.2 b/man2/ioctl_tty.2
index c1875530f0b1..91aceddb7828 100644
--- a/man2/ioctl_tty.2
+++ b/man2/ioctl_tty.2
@@ -11,8 +11,8 @@ ioctl_tty \- ioctls for terminals and serial lines
 .SH SYNOPSIS
 .nf
 .B #include <sys/ioctl.h>
-.BR "#include <termios.h>" "      /* Definition of " CLOCAL ", and"
-.BR    "                             TC*" { FLUSH , ON , OFF "} constants */"
+.BR "#include <asm/termbits.h>"   "   /* Definition of " struct " " termios ", " struct " " termios2 ","
+.BR "                              " " " BOTHER ", " CLOCAL ", and " TC* { FLUSH , ON , OFF "} constants */"
 .PP
 .BI "int ioctl(int " fd ", int " cmd ", ...);"
 .fi
@@ -31,6 +31,19 @@ makes for nonportable programs.
 Use the POSIX interface described in
 .BR termios (3)
 whenever possible.
+.PP
+Please note that
+.B struct termios
+from
+.B #include <asm/termbits.h>
+is different and incompatible with
+.B struct termios
+from
+.BR "#include <termios.h>" .
+These ioctl calls require
+.B struct termios
+from
+.BR "#include <asm/termbits.h>" .
 .SS Get and set terminal attributes
 .TP
 .B TCGETS
-- 
2.20.1