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-rw-r--r--gdb/gdbtk/library/tty.tcl55
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diff --git a/gdb/gdbtk/library/tty.tcl b/gdb/gdbtk/library/tty.tcl
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-# tty.tcl - xterm as tty for the inferior
-# Copyright (C) 1996, 2000 Red Hat, Inc
-# Written by Tom Tromey <tromey@cygnus.com>
-#
-# Interface to the inferior's terminal. This is very rough, and is
-# guaranteed to only work on Unix machines (if even there).
-#
-
-namespace eval tty {
- namespace export create
-
- variable _xterm_fd {}
-
- proc create {} {
- variable _xterm_fd
-
- destroy
-
- # Tricky: we exec /bin/cat so that the xterm will exit whenever we
- # close the write end of the pipe. Note that the stdin
- # redirection must come after tty is run; tty looks at its stdin.
- set shcmd {/bin/sh -c 'exec 1>&7; tty; exec /bin/cat 0<&6'}
-
- set fg [option get . foreground Foreground]
- if {$fg == ""} then {
- set fg black
- }
-
- set bg [. cget -background]
- if {$bg == ""} then {
- set bg [lindex [. configure -background] 3]
- }
-
- set xterm [list /bin/sh -c "exec xterm -T 'Gdb Child' -n Gdb -bg '$bg' -fg '$fg' -e $shcmd 6<&0 7>&1"]
-
- # Need both read and write access to xterm process.
- set _xterm_fd [open "| $xterm" w+]
- set tty [gets $_xterm_fd]
-
- # On failure we don't try the tty command.
- if {$tty != ""} {
- gdb_cmd "tty $tty"
- }
- }
-
- proc destroy {} {
- variable _xterm_fd
-
- if {$_xterm_fd != ""} then {
- # We don't care if this fails.
- catch {close $_xterm_fd}
- }
- set _xterm_fd {}
- }
-}