# Copyright (C) 2015 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Check that "gdb -batch -ex run" does not leave the terminal in the
# wrong state.

standard_testfile

if {[build_executable "failed to prepare" $testfile $srcfile debug] == -1} {
    return -1
}

set file_arg $binfile
if [is_remote host] {
  set file_arg [remote_download host $file_arg]
}

global GDBFLAGS
set saved_gdbflags $GDBFLAGS

# The shell's prompt.
set shell_prompt "$ "
set shell_prompt_re [string_to_regexp $shell_prompt]

# Spawn shell.  Returns true on success, false otherwise.

proc spawn_shell {} {
    global shell_prompt_re

    set res [remote_spawn host "/bin/sh"]
    if { $res < 0 || $res == "" } {
	unsupported "Spawning shell failed."
	return 0
    }

    set gotit 0
    set test "spawn shell"
    gdb_expect {
	-re "$shell_prompt_re$" {
	    pass $test
	    set gotit 1
	}
	timeout {
	    fail "$test (timeout)"
	}
	eof {
	    fail "$test (eof)"
	}
    }

    return $gotit
}

# Exit the shell.

proc exit_shell {} {
    global shell_prompt_re

    set test "exit shell"
    send_gdb "exit\n"
    gdb_expect {
	timeout {
	    fail "$test (timeout)"
	    return 0
	}
	eof {
	    pass "$test"
	}
    }
    if ![is_remote host] {
	remote_close host
    }
}

# Run "stty" and store the output in $result.  Returns true on
# success, false otherwise.

proc run_stty {message result} {
    global shell_prompt_re

    upvar $result output

    send_gdb "stty || echo \"not found\"\n"
    set gotit 0
    gdb_expect {
	-re "not found.*not found.*$shell_prompt_re$" {
	    pass "$message (not found)"
	}
	-re "(.*)$shell_prompt_re$" {
	    set output $expect_out(1,string)
	    set gotit 1
	    pass $message
	}
	timeout {
	    fail "$message (timeout)"
	}
	eof {
	    fail "$message (eof)"
	}
    }
    return $gotit
}

# Check that "gdb -batch -ex run" does not leave the terminal in the
# wrong state.

proc test_terminal_settings_preserved {} {
    global file_arg
    global GDB INTERNAL_GDBFLAGS GDBFLAGS
    global gdb_prompt pagination_prompt
    global saved_gdbflags
    global shell_prompt_re

    if ![spawn_shell] {
	return
    }

    set stty_supported [run_stty "stty before" stty_before]

    set test "gdb -batch -ex run"
    set GDBFLAGS $saved_gdbflags
    append GDBFLAGS " -batch"
    append GDBFLAGS " -ex \"set height unlimited\""
    append GDBFLAGS " -ex \"start\""
    append GDBFLAGS " --args \"$file_arg\""
    send_gdb "$GDB $INTERNAL_GDBFLAGS $GDBFLAGS [host_info gdb_opts]\n"
    gdb_expect {
	-re "Don't know how to run.*$shell_prompt_re$" {
	    unsupported $test
	}
	-re "$gdb_prompt $" {
	    # -batch implies no GDB prompt.
	    fail $test
	}
	-re "Temporary breakpoint .*$shell_prompt_re$" {
	    pass $test
	}
	timeout {
	    fail "$test (timeout)"
	}
	eof {
	    fail "$test (eof)"
	}
    }

    set test "echo test_echo"
    send_gdb "echo test_echo\n"
    gdb_expect {
	-re "^echo test_echo\r\ntest_echo\r\n.*$shell_prompt_re$" {
	    pass $test
	}
	timeout {
	    fail "$test (timeout)"
	}
	eof {
	    fail "$test (eof)"
	}
    }

    set test "terminal settings preserved"
    if $stty_supported {
	run_stty "stty after" stty_after

	gdb_assert [string equal $stty_before $stty_after] $test
    } else {
	unsupported "$test (no stty)"
    }

    exit_shell
}

test_terminal_settings_preserved

set GDBFLAGS $saved_gdbflags