Mail Archives: cygwin/2011/04/28/13:58:00
Nellis, Kenneth wrote:
> In .bash_profile I use cygpath to convert several environment
> variables that contain Windows paths to instead contain Unix
> paths. One in particular, SYSTEMROOT, has caused several
> problems, one of which is causing ClearCase's cleartool to be
> non-functional. Another is strictly within Cygwin itself
> where there seems to be some funny relationship between
> SYSTEMROOT, having the working directory be /proc, and the
> cygpath command.
>
> The script, below, demonstrates the problem. It takes the
> following options:
> 0: run with defaults
> 1: run with cd /proc
> 2: run with SYSTEMROOT cygpath'd
> 3: run with both options
-----
I tried your script on my system and couldn't reproduce
the results.
I altered the script to run all cases in succession.
My results on all 4 cases (calling script with "test.sh all 3")
case=all, count=3
5572: old priority 0, new priority -19
case = 0, PWD=/tmp, SYSTEMROOT=C:\Windows,
Iter 0 @ 10:51:30: 0.07sec 0.01usr 0.00sys (19.73% cpu)
Iter 0 @ 10:51:31: 0.07sec 0.01usr 0.00sys (19.23% cpu)
Iter 0 @ 10:51:32: 0.07sec 0.01usr 0.00sys (19.23% cpu)
case = 1, PWD=/proc, SYSTEMROOT=C:\Windows,
Iter 1 @ 10:51:32: 0.08sec 0.00usr 0.03sys (37.80% cpu)
Iter 1 @ 10:51:33: 0.07sec 0.03usr 0.00sys (39.24% cpu)
Iter 1 @ 10:51:33: 0.08sec 0.00usr 0.01sys (18.75% cpu)
case = 2, PWD=/tmp, SYSTEMROOT=/Windows,
Iter 2 @ 10:51:34: 0.08sec 0.00usr 0.00sys (0.00% cpu)
Iter 2 @ 10:51:35: 0.07sec 0.00usr 0.01sys (19.23% cpu)
Iter 2 @ 10:51:35: 0.07sec 0.01usr 0.01sys (38.46% cpu)
case = 3, PWD=/proc, SYSTEMROOT=/Windows,
Iter 3 @ 10:51:36: 0.07sec 0.00usr 0.01sys (19.48% cpu)
Iter 3 @ 10:51:36: 0.07sec 0.00usr 0.03sys (41.33% cpu)
Iter 3 @ 10:51:37: 0.07sec 0.01usr 0.01sys (40.25% cpu)
Script:
#!/bin/bash
TIMEFORMAT="%2Rsec %2Uusr %2Ssys (%P%% cpu)"
case=-1
count=20
uname -a
function usage {
echo "Usage: $0 {0|1|2|3|all}"
exit 1
}
function _setup {
local case=$1
count=${2:-$count}
#echo "_setup1: case=$case, count=$count"
case $case in
0) ;;
1) cd /proc
;;
2) SYSTEMROOT=$(cygpath "$SYSTEMROOT")
;;
3) cd /proc
SYSTEMROOT=$(cygpath "$SYSTEMROOT")
;;
all)
;;
*) echo "$0: invalid parameter: $1"
usage
exit 1
;;
esac
echo "$case $count"
}
function do_test {
case=$1
use_count=$2
echo " case = $case, PWD=$PWD, SYSTEMROOT=$SYSTEMROOT, "
for ((n=1; n<=use_count; n++)); do
echo -n "Iter $1 @ $(date +'%H:%M:%S'): "
time cygpath /proc &>/dev/null
sleep 0.3
done
}
#get case & count from initial setup
read case count<<< "$(_setup "$@")"
echo "case=$case, count=$count"
# try for highest priority to minimize other procs 'stealing' cpu cycles
renice -19 $$
if [[ $case != all ]] ;then
do_test $case $count
elif [[ $case == all ]]; then
for ((case=0; case<=3; ++case)); do
# call setup before each 'do_test' to simulate original script and do
# each in a subshell to isolate any unanticipated side-effects
(
_setup $case $count &>/dev/null
do_test $case $count
)
done
fi
--
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