coprocess.sh revision 34f9b3eef6fdadbda0a846aa4d68691ac40eace5
########################################################################
# #
# This software is part of the ast package #
# Copyright (c) 1982-2009 AT&T Intellectual Property #
# and is licensed under the #
# Common Public License, Version 1.0 #
# by AT&T Intellectual Property #
# #
# A copy of the License is available at #
# http://www.opensource.org/licenses/cpl1.0.txt #
# (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) #
# #
# Information and Software Systems Research #
# AT&T Research #
# Florham Park NJ #
# #
# David Korn <dgk@research.att.com> #
# #
########################################################################
# test the behavior of co-processes
function err_exit
{
print -u2 -n "\t"
print -u2 -r ${Command}[$1]: "${@:2}"
let Errors+=1
}
alias err_exit='err_exit $LINENO'
Command=${0##*/}
integer Errors=0
tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
trap "cd /; rm -rf $tmp" EXIT
if [[ -d /cygdrive ]]
then err_exit cygwin detected - coprocess tests disabled - enable at the risk of wedging your system
exit $((Errors))
fi
function ping # id
{
integer x=0
while ((x++ < 5))
do read -r
print -r "$1 $REPLY"
done
}
cat |&
print -p "hello"
read -p line
[[ $line == hello ]] || err_exit 'coprocessing fails'
exec 5>&p 6<&p
print -u5 'hello again' || err_exit 'write on u5 fails'
read -u6 line
[[ $line == 'hello again' ]] || err_exit 'coprocess after moving fds fails'
exec 5<&- 6<&-
wait $!
ping three |&
exec 3>&p
ping four |&
exec 4>&p
ping pipe |&
integer count
for i in three four pipe four pipe four three pipe pipe three pipe
do case $i in
three) to=-u3;;
four) to=-u4;;
pipe) to=-p;;
esac
(( count++ ))
print $to $i $count
done
while ((count > 0))
do (( count-- ))
read -p
set -- $REPLY
if [[ $1 != $2 ]]
then err_exit "$1 does not match $2"
fi
case $1 in
three) ;;
four) ;;
pipe) ;;
*) err_exit "unknown message +|$REPLY|+" ;;
esac
done
kill $(jobs -p) 2>/dev/null
file=$tmp/regress
cat > $file <<\!
/bin/cat |&
!
chmod +x $file
sleep 10 |&
$file 2> /dev/null || err_exit "parent coprocess prevents script coprocess"
exec 5<&p 6>&p
exec 5<&- 6>&-
kill $(jobs -p) 2>/dev/null
${SHELL-ksh} |&
cop=$!
exp=Done
print -p $'print hello | cat\nprint '$exp
read -t 5 -p
read -t 5 -p
got=$REPLY
if [[ $got != $exp ]]
then err_exit "${SHELL-ksh} coprocess io failed -- got '$got', expected '$exp'"
fi
exec 5<&p 6>&p
exec 5<&- 6>&-
{ sleep 4; kill $cop; } 2>/dev/null &
spy=$!
if wait $cop 2>/dev/null
then kill $spy 2>/dev/null
else err_exit "coprocess hung after 'exec 5<&p 6>&p; exec 5<&- 6>&-'"
fi
wait
{
echo line1 | grep 'line2'
echo line2 | grep 'line1'
} |&
SECONDS=0 count=0
while read -p -t 10 line
do ((count++))
done
if (( SECONDS > 8 ))
then err_exit "read -p hanging (SECONDS=$SECONDS count=$count)"
fi
wait $!
( sleep 3 |& sleep 1 && kill $!; sleep 1; sleep 3 |& sleep 1 && kill $! ) ||
err_exit "coprocess cleanup not working correctly"
{ : |& } 2>/dev/null ||
err_exit "subshell coprocess lingers in parent"
wait $!
unset N r e
integer N=5
e=12345
(
integer i
for ((i = 1; i <= N; i++))
do print $i |&
read -p r
print -n $r
wait $!
done
print
) 2>/dev/null | read -t 10 r
[[ $r == $e ]] || err_exit "coprocess timing bug -- expected $e, got '$r'"
r=
(
integer i
for ((i = 1; i <= N; i++))
do print $i |&
sleep 0.01
r=$r$(cat <&p)
wait $!
done
print $r
) 2>/dev/null | read -t 10 r
[[ $r == $e ]] || err_exit "coprocess command substitution bug -- expected $e, got '$r'"
(
/bin/cat |&
sleep 0.01
exec 6>&p
print -u6 ok
exec 6>&-
sleep 1
kill $! 2> /dev/null
) && err_exit 'coprocess with subshell would hang'
for sig in IOT ABRT
do if ( trap - $sig ) 2> /dev/null
then if [[ $( { sig=$sig $SHELL 2> /dev/null <<- '++EOF++'
cat |&
pid=$!
trap "print TRAP" $sig
(
sleep 2
kill -$sig $$
sleep 2
kill -$sig $$
kill $pid
sleep 2
kill $$
) &
read -p
++EOF++
} ) != $'TRAP\nTRAP' ]] 2> /dev/null
then err_exit 'traps when reading from coprocess not working'
fi
break
fi
done
trap 'sleep_pid=; kill $pid; err_exit "coprocess 1 hung"' TERM
{ sleep 5; kill $$; } &
sleep_pid=$!
builtin cat
cat |&
pid=$!
exec 5<&p 6>&p
print -u6 hi; read -u5
[[ $REPLY == hi ]] || err_exit 'REPLY is $REPLY not hi'
exec 6>&-
wait $pid
trap - TERM
[[ $sleep_pid ]] && kill $sleep_pid
trap 'sleep_pid=; kill $pid; err_exit "coprocess 2 hung"' TERM
{ sleep 5; kill $$; } &
sleep_pid=$!
cat |&
pid=$!
print foo >&p 2> /dev/null || err_exit 'first write of foo to coprocess failed'
print foo >&p 2> /dev/null || err_exit 'second write of foo to coprocess failed'
kill $pid
wait $pid 2> /dev/null
trap - TERM
[[ $sleep_pid ]] && kill $sleep_pid
trap 'sleep_pid=; kill $pid; err_exit "coprocess 3 hung"' TERM
{ sleep 5; kill $$; } &
sleep_pid=$!
cat |&
pid=$!
print -p foo
print -p bar
read <&p || err_exit 'first read from coprocess failed'
[[ $REPLY == foo ]] || err_exit "first REPLY is $REPLY not foo"
read <&p || err_exit 'second read from coprocess failed'
[[ $REPLY == bar ]] || err_exit "second REPLY is $REPLY not bar"
kill $pid
wait $pid 2> /dev/null
trap - TERM
[[ $sleep_pid ]] && kill $sleep_pid
exp=ksh
got=$(print -r $'#00315
COATTRIBUTES=\'label=make \'
# @(#)$Id: libcoshell (AT&T Research) 2008-04-28 $
_COSHELL_msgfd=5
{ { (eval \'function fun { trap \":\" 0; return 1; }; trap \"exit 0\" 0; fun; exit 1\') && PATH= print -u$_COSHELL_msgfd ksh; } || { times && echo bsh >&$_COSHELL_msgfd; } || { echo osh >&$_COSHELL_msgfd; }; } >/dev/null 2>&1' | $SHELL 5>&1)
[[ $got == $exp ]] || err_exit "coshell(3) identification sequence failed -- expected '$exp', got '$got'"
function cop
{
read
print ok
}
exp=ok
cop |&
pid=$!
if print -p yo 2>/dev/null
then read -p got
else got='no coprocess'
fi
[[ $got == $exp ]] || err_exit "main coprocess main query failed -- expected $exp, got '$got'"
kill $pid 2>/dev/null
wait
cop |&
pid=$!
(
if print -p yo 2>/dev/null
then read -p got
else got='no coprocess'
fi
[[ $got == $exp ]] || err_exit "main coprocess subshell query failed -- expected $exp, got '$got'"
)
kill $pid 2>/dev/null
wait
exp='no coprocess'
(
cop |&
print $! > $tmp/pid
)
pid=$(<$tmp/pid)
if print -p yo 2>/dev/null
then read -p got
else got=$exp
fi
[[ $got == $exp ]] || err_exit "subshell coprocess main query failed -- expected $exp, got '$got'"
kill $pid 2>/dev/null
wait
(
cop |&
print $! > $tmp/pid
)
pid=$(<$tmp/pid)
(
if print -p yo 2>/dev/null
then read -p got
else got=$exp
fi
[[ $got == $exp ]] || err_exit "subshell coprocess subshell query failed -- expected $exp, got '$got'"
kill $pid 2>/dev/null
wait
)
exit $((Errors))