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# Copyright 2015-2018 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/>.
# This file is part of the gdb testsuite.
# Test the setting of "history size" via the GDBHISTSIZE environment variable
# We cannot expect remote hosts to see environment variables set on the
# local machine.
if { [is_remote host] } {
unsupported "can't set environment variables on remote host"
return -1
}
# Check that the history size is properly set to SIZE when the environment
# variable ENV_VAR is set to GDBHISTSIZE.
proc test_histsize_history_setting { histsize size { env_var "GDBHISTSIZE" } } {
global env
save_vars { env(GDBHISTFILE) env(GDBHISTSIZE) env($env_var) } {
# These environment variables take precedence over whatever
# history size is set in .gdbinit. Make sure the former is not
# set.
unset -nocomplain env(GDBHISTFILE)
unset -nocomplain env(GDBHISTSIZE)
set env($env_var) $histsize
with_test_prefix "histsize=$histsize" {
gdb_exit
gdb_start
gdb_test "show history size" "The size of the command history is $size."
if { $size == "0" } {
gdb_test_no_output "show commands"
} elseif { $size != "1" } {
gdb_test "show commands" \
" . show history size\r\n . show commands"
}
}
}
}
test_histsize_history_setting "" "unlimited"
test_histsize_history_setting "0" "0"
test_histsize_history_setting "20" "20"
test_histsize_history_setting " 20 " "20"
test_histsize_history_setting "-5" "unlimited"
# Test defaulting to 256 upon encountering a non-numeric GDBHISTSIZE.
test_histsize_history_setting "not_an_integer" "256"
test_histsize_history_setting "10zab" "256"
test_histsize_history_setting "-5ab" "256"
# A huge number (hopefully larger than INT_MAX)
test_histsize_history_setting "99999999999999999999999999999999999" "unlimited"
# We no longer read HISTSIZE
test_histsize_history_setting "50" "256" "HISTSIZE"
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