#   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/>.
#
export LC_ALL=C
export LANG=C

if [ $UID -eq 0 ]; then
        echo "execscript: the test suite should not be run as root" >&2
fi

# this should succeed silently
$cmd &

set -- one two three
echo before exec1.sub: "$@"
echo calling exec1.sub
./exec1.sub aa bb cc dd ee
echo after exec1.sub with args: $?
./exec1.sub
echo after exec1.sub without args: $?
echo after exec1.sub: "$@"

# set up a fixed path so we know notthere will not be found
PATH=/usr/bin:/bin:/usr/local/bin:
export PATH

notthere
echo $?

# now let's set up a command-not-found hook
command_not_found_handle()
{
        echo we would do something here with $1
}
notthere a b c
unset -f command_not_found_handle

# this is iffy, since the error messages may vary from system to system
# and /tmp might not exist
ln -s ${THIS_SH} /tmp/bash 2>/dev/null
if [ -f /tmp/bash ]; then
	/tmp/bash notthere
else
	${THIS_SH} notthere
fi
echo $?
rm -f /tmp/bash

# /bin/sh should be there on all systems
${THIS_SH} /bin/sh
echo $?

# try executing a directory
/
echo $?

${THIS_SH} /
echo $?

# trying to exec a directory is a fatal error
${THIS_SH} -c 'exec . ; default: after exec directory' bash
POSIXLY_CORRECT=1 ${THIS_SH} -c 'exec . ; posix: after exec directory' posix-bash

# even if preceded by `command'
${THIS_SH} -c 'command exec . ; default: after command exec directory 2' bash
POSIXLY_CORRECT=1 ${THIS_SH} -c 'command exec . ; posix: after command exec directory 2' posix-bash

# try sourcing a directory
. /
echo $?

# try sourcing a binary file -- post-2.04 versions don't do the binary file
# check, and will probably fail with `command not found', or status 127
# bash-4.1 and later check for 256 NUL characters and fail as binary files
# if there are more than that, it's probably binary
. ${THIS_SH} 2>/dev/null
echo $?

# post-bash-2.05 versions allow sourcing non-regular files
. /dev/null
echo $?

# kill two birds with one test -- test out the BASH_ENV code
echo echo this is bashenv > $TMPDIR/bashenv
export BASH_ENV=$TMPDIR/bashenv
${THIS_SH} ./exec3.sub
rm -f $TMPDIR/bashenv
unset BASH_ENV

# these results should be the same as with an empty PATH
PATH=.

notthere
echo $?
command notthere
echo $?
command -p notthere
echo $?

# we're resetting the $PATH to empty, so this should be last
PATH=

notthere
echo $?
command notthere
echo $?
command -p notthere
echo $?

# but -p should guarantee that we find all the standard utilities, even
# with an empty or unset $PATH
command -p sh -c 'echo this is $0'
unset PATH
command -p sh -c 'echo this is $0'

# a bug in bash before bash-2.01 caused PATH to be set to the empty string
# when command -p was run with PATH unset
echo ${PATH-unset}

echo "echo ok" | ${THIS_SH} -t

${THIS_SH} ./exec2.sub
echo $?

${THIS_SH} ./exec4.sub

# try exec'ing a command that cannot be found in $PATH
${THIS_SH} ./exec5.sub

# this was a bug in bash versions before bash-2.04
${THIS_SH} -c 'cat </dev/null | cat >/dev/null' >&-

# checks for proper return values in subshell commands with inverted return
# values

${THIS_SH} ./exec6.sub

# checks for properly deciding what constitutes an executable file
${THIS_SH} ./exec7.sub

${THIS_SH} -i ${PWD}/exec8.sub

${THIS_SH} ./exec9.sub

${THIS_SH} ./exec10.sub
${THIS_SH} ./exec11.sub

true | `echo true` &

echo after

# Problem with bash at least back to version 3.0
${THIS_SH} -c 'VAR=0; VAR=1 command exec; exit ${VAR}'

# problem with bash through bash-4.1
(
        exec /var/empty/nosuch
        echo bad
) 2>/dev/null
[ $? = 127 ] || echo FAIL: bad exit status $? at $LINENO

unset FALSE
if [ -x /bin/false ]; then
	FALSE=/bin/false
elif [ -x /usr/bin/false ]; then
	FALSE=/usr/bin/false
else
	FALSE='command false'
fi

# problem with undoing redirections before running exit trap through bash-4.3

${THIS_SH} ./exec12.sub false	# function
${THIS_SH} ./exec12.sub command false
${THIS_SH} ./exec12.sub $FALSE

${THIS_SH} ./exec12.sub notfound
${THIS_SH} ./exec12.sub syntaxerror
${THIS_SH} ./exec12.sub nosuchcommand

# problem with fork optimization in bash-4.4-alpha

$THIS_SH -c 'echo a && /bin/echo b && echo c'
$THIS_SH -c 'echo A && /bin/echo B'

$THIS_SH -c '/bin/echo c && echo d'
$THIS_SH -c '/bin/echo c && /bin/echo d && echo e'

${THIS_SH} ./exec13.sub
${THIS_SH} ./exec14.sub

# problems with fork optimization in bash-5.2
${THIS_SH} ./exec15.sub

# problems with set -e and inverting commands' return status
${THIS_SH} ./exec16.sub

# test behavior of redirections when exec fails and does not exit the shell
${THIS_SH} ./exec17.sub