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OT: A question about bash scripting
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Ralf Mardorf
Oct 29, 2012, 7:10:02 AM10/29/12
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Hi :)
how can I get rid of the variable "seconds"?
((seconds=(done-started)-(((done-started)/60)*60)+100))
min_sec=$(((done-started)/60))":"${seconds: -2}
^^^^^^^ the math should replace the
variable.
### Killall and Restore session
started=$(date +%s)
bash "$song_path/session/start-session-$startversion"
### Time
month=$(date +%B)
mon=$(date +%b)
d_y_t=$(date '+/%d/%Y %T')
done=$(date +%s)
((seconds=(done-started)-(((done-started)/60)*60)+100))
min_sec=$(((done-started)/60))":"${seconds: -2}
echo
echo "Attended time to restore session: $min_sec"
echo -n "Session restored at " ; printf %9.9s $month ; echo $d_y_t
echo
TIA,
Ralf
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how can I get rid of the variable "seconds"?
((seconds=(done-started)-(((done-started)/60)*60)+100))
min_sec=$(((done-started)/60))":"${seconds: -2}
^^^^^^^ the math should replace the
variable.
### Killall and Restore session
started=$(date +%s)
bash "$song_path/session/start-session-$startversion"
### Time
month=$(date +%B)
mon=$(date +%b)
d_y_t=$(date '+/%d/%Y %T')
done=$(date +%s)
((seconds=(done-started)-(((done-started)/60)*60)+100))
min_sec=$(((done-started)/60))":"${seconds: -2}
echo
echo "Attended time to restore session: $min_sec"
echo -n "Session restored at " ; printf %9.9s $month ; echo $d_y_t
echo
TIA,
Ralf
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Wolf Halton
Oct 29, 2012, 3:10:02 PM10/29/12
to
On Mon, Oct 29, 2012 at 6:57 AM, Ralf Mardorf
<ralf.m...@alice-dsl.net> wrote:
> Hi :)
>
> how can I get rid of the variable "seconds"?
>
> ((seconds=(done-started)-(((done-started)/60)*60)+100))
> min_sec=$(((done-started)/60))":"${seconds: -2}
> ^^^^^^^ the math should replace the
> variable.
>
> ### Killall and Restore session
> started=$(date +%s)
> bash "$song_path/session/start-session-$startversion"
>
> ### Time
> month=$(date +%B)
> mon=$(date +%b)
> d_y_t=$(date '+/%d/%Y %T')
> done=$(date +%s)
> ((seconds=(done-started)-(((done-started)/60)*60)+100))
> min_sec=$(((done-started)/60))":"${seconds: -2}
> echo
> echo "Attended time to restore session: $min_sec"
> echo -n "Session restored at " ; printf %9.9s $month ; echo $d_y_t
> echo
>
> TIA,
> Ralf
>
>
Ralf,
<ralf.m...@alice-dsl.net> wrote:
> Hi :)
>
> how can I get rid of the variable "seconds"?
>
> ((seconds=(done-started)-(((done-started)/60)*60)+100))
> min_sec=$(((done-started)/60))":"${seconds: -2}
> ^^^^^^^ the math should replace the
> variable.
>
> ### Killall and Restore session
> started=$(date +%s)
> bash "$song_path/session/start-session-$startversion"
>
> ### Time
> month=$(date +%B)
> mon=$(date +%b)
> d_y_t=$(date '+/%d/%Y %T')
> done=$(date +%s)
> ((seconds=(done-started)-(((done-started)/60)*60)+100))
> min_sec=$(((done-started)/60))":"${seconds: -2}
> echo
> echo "Attended time to restore session: $min_sec"
> echo -n "Session restored at " ; printf %9.9s $month ; echo $d_y_t
> echo
>
> TIA,
> Ralf
>
>
I don't understand.
What are you wanting to do with the script?
If you don't like the name of the variable, make up another one.
Wolf
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Ralf Mardorf
Oct 29, 2012, 3:30:02 PM10/29/12
to
((done-started)-(((done-started)/60)*60)+100)) inside the formatted
string ${seconds: -2} , instead of a variable.
Something similar to
${((done-started)-(((done-started)/60)*60)+100)): -2}
Similar, because I'm missing something.
Regards,
Ralf
PS: In German:
Das "${seconds: -2}" formatiert den String und statt "seconds" soll dort
((done-started)-(((done-started)/60)*60)+100)) eingefügt werden. Doch
wie?
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Neal Murphy
Oct 29, 2012, 4:00:02 PM10/29/12
to
You missed the $((...)) syntax as exemplified by the '(done-started)/60' just before it:
min_sec=$(((done-started)/60))":"
min_sec=${min_sec}$(((done-started)-(((done-started)/60)*60)+100))
Ralf Mardorf
Oct 29, 2012, 4:40:02 PM10/29/12
to
((seconds=(done-started)-(((done-started)/60)*60)+100))
min_sec=$(((done-started)/60))":"${seconds: -2}
I don't understand your reply.
Even if I would add ${min_sec: 2} to each "echo" command (there will be
a second output to a log file, it wouldn't be formatted as needed.
FOR YOUR EXAMPLE, IIUC IT SHOULD BE? ...
### Killall and Restore session
started=$(date +%s)
### Time
month=$(date +%B)
mon=$(date +%b)
d_y_t=$(date '+/%d/%Y %T')
done=$(date +%s)
#min_sec=$(((done-started)/60))":"${seconds: -2}
min_sec=$(((done-started)/60))":"$(((done-started)-(((done-started)/60)*60)+100))
echo
echo "Attended time to restore session: $min_sec"
echo -n "Session restored at " ; printf %9.9s $month ; echo $d_y_t
echo
... RESULT ...
echo "Attended time to restore session: $min_sec"
echo -n "Session restored at " ; printf %9.9s $month ; echo $d_y_t
echo
Attended time to restore session: 0:102
Session restored at October/29/2012 21:11:43
... RESP. ...
### Killall and Restore session
started=$(date +%s)
### Time
month=$(date +%B)
mon=$(date +%b)
d_y_t=$(date '+/%d/%Y %T')
done=$(date +%s)
#min_sec=$(((done-started)/60))":"${seconds: -2}
min_sec=$(((done-started)/60))":"$(((done-started)-(((done-started)/60)*60)+100))
min_sec=${min_sec: 2}
echo
echo "Attended time to restore session: $min_sec"
echo -n "Session restored at " ; printf %9.9s $month ; echo $d_y_t
echo
... RESULT ...
echo "Attended time to restore session: $min_sec"
echo -n "Session restored at " ; printf %9.9s $month ; echo $d_y_t
echo
Attended time to restore session: 102
Session restored at October/29/2012 21:17:26
BUT I NEED ...
### Killall and Restore session
started=$(date +%s)
### Time
month=$(date +%B)
mon=$(date +%b)
d_y_t=$(date '+/%d/%Y %T')
done=$(date +%s)
((seconds=(done-started)-(((done-started)/60)*60)+100))
min_sec=$(((done-started)/60))":"${seconds: -2}
echo
echo "Attended time to restore session: $min_sec"
echo -n "Session restored at " ; printf %9.9s $month ; echo $d_y_t
echo
Attended time to restore session: 0:02
Session restored at October/29/2012 21:21:32
... WHILE I WONT THIS 2 lines, AS ONE LINE, INCLUDING THE FORMATTING:
((seconds=(done-started)-(((done-started)/60)*60)+100))
min_sec=$(((done-started)/60))":"${seconds: -2}
Ralf
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Ralf Mardorf
Oct 29, 2012, 4:40:02 PM10/29/12
to
> ... WHILE I WONT THIS 2 lines, AS ONE LINE, INCLUDING THE FORMATTING:
letters aren't for shouting, just to distinguish the mail's text from
the script.
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Dom
Oct 29, 2012, 5:40:04 PM10/29/12
to
On 29/10/12 20:31, Ralf Mardorf wrote:
(trimmed)
Would this do what you are after?
### Killall and Restore session
started=$(date +%s)
sleep 2
### Time
month=$(date +%B)
mon=$(date +%b)
d_y_t=$(date '+/%d/%Y %T')
done=$(date +%s)
echo
printf "Attended time to restore session: %4d:%02d\n"
$(((done-started)/60)) $(((done-started)%60))
printf "Session restored at %9.9s%s\n" "$month" "$d_y_t"
echo
(The first "printf" is a long line that will probably get spilt by
email. It should all be on one line).
Also the SECONDS shell counter variable is useful for this sort of thing.
For example:
...
done=$SECONDS
--
Dom
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(trimmed)
### Killall and Restore session
started=$(date +%s)
sleep 2
### Time
month=$(date +%B)
mon=$(date +%b)
d_y_t=$(date '+/%d/%Y %T')
done=$(date +%s)
printf "Attended time to restore session: %4d:%02d\n"
$(((done-started)/60)) $(((done-started)%60))
printf "Session restored at %9.9s%s\n" "$month" "$d_y_t"
echo
(The first "printf" is a long line that will probably get spilt by
email. It should all be on one line).
Also the SECONDS shell counter variable is useful for this sort of thing.
For example:
### Killall and Restore session
SECONDS=0
...
done=$SECONDS
--
Dom
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Neal Murphy
Oct 29, 2012, 7:00:02 PM10/29/12
to
What's the '+100' supposed to do? Add 100 to the remaining seconds? Or subtract 100 from it? (That is, increase or decrease the number of seconds?) The way it is now, the number of seconds will never be less than 100 and your ': -2' tweak will never trigger anyway.
What you are asking cannot be done. You cannot nest substitutions in the manner you wish, and getting the leading zero on the seconds is problematic using only bash.
I don't think you can put that many conditionals on a single line and have it remain comprehendable.
However, you might be able to do it using awk:
### Killall and Restore session
started=$(date +%s)
sleep 2
### Time
month=$(date +%B)
mon=$(date +%b)
d_y_t=$(date '+/%d/%Y %T')
done=$(date +%s)
min_sec=$(((done-started)/60))":"$(echo $done $started | awk '{s=($1-$2)%60; if (s==0) {s=2;} printf ("%2.2d", s);}')
echo
echo "Attended time to restore session: $min_sec"
echo -n "Session restored at " ; printf %9.9s $month ; echo $d_y_t
echo
But regardless, the line is going to be rather long. Unless you use a shell function:
getSeconds () {
echo $done $started | \
awk '{
s=($1-$2)%60;
if (s==0) {s=2;}
printf ("%2.2d", s);
}'
Then use:
min_sec=$(((done-started)/60))":"$(getSeconds)
But I still don't see what the '+100" is supposed to do.
Ralf Mardorf
Oct 29, 2012, 7:30:01 PM10/29/12
to
On Mon, 2012-10-29 at 21:31 +0000, Dom wrote:
> Would this do what you are after?
>
> ### Killall and Restore session
> started=$(date +%s)
> sleep 2
>
> ### Time
> month=$(date +%B)
> mon=$(date +%b)
> d_y_t=$(date '+/%d/%Y %T')
> done=$(date +%s)
> echo
> printf "Attended time to restore session: %4d:%02d\n"
> $(((done-started)/60)) $(((done-started)%60))
> printf "Session restored at %9.9s%s\n" "$month" "$d_y_t"
> echo
>
> (The first "printf" is a long line that will probably get spilt by
> email. It should all be on one line).
>
> Also the SECONDS shell counter variable is useful for this sort of thing.
>
> For example:
> ### Killall and Restore session
> SECONDS=0
>
> ...
>
> done=$SECONDS
Thank you :)
> Would this do what you are after?
>
> ### Killall and Restore session
> started=$(date +%s)
> sleep 2
>
> ### Time
> month=$(date +%B)
> mon=$(date +%b)
> d_y_t=$(date '+/%d/%Y %T')
> done=$(date +%s)
> echo
> printf "Attended time to restore session: %4d:%02d\n"
> $(((done-started)/60)) $(((done-started)%60))
> printf "Session restored at %9.9s%s\n" "$month" "$d_y_t"
> echo
>
> (The first "printf" is a long line that will probably get spilt by
> email. It should all be on one line).
>
> Also the SECONDS shell counter variable is useful for this sort of thing.
>
> For example:
> ### Killall and Restore session
> SECONDS=0
>
> ...
>
> done=$SECONDS
that's it.
started=$(date +%s)
SECONDS=0
sleep 72
### Time
month=$(date +%B)
mon=$(date +%b)
d_y_t=$(date '+/%d/%Y %T')
done=$(date +%s)
((seconds=(done-started)-(((done-started)/60)*60)+100))
min_sec=$(((done-started)/60))":"${seconds: -2}
echo
echo "Attended time to restore session: $min_sec"
echo -n "Session restored at " ; printf %9.9s $month ; echo $d_y_t
echo
echo
printf "Attended time to restore session: %9d:%02d\n" $min $sec
printf "Session restored at %9.9s%s\n" "$month" "$d_y_t"
echo
### Log file
echo
grep "Write to log file enabled." $log_file > /dev/null
if [ $? -eq 0 ] ; then
echo " Restore: $min_sec $mon$d_y_t" >> $log_file
printf " Restore: %s:%02d %s%s\n" "$min" $sec "$mon" "$d_y_t" >> $log_file
fi
Regards,
Ralf
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Ralf Mardorf
Oct 29, 2012, 7:50:02 PM10/29/12
to
On Mon, 2012-10-29 at 18:52 -0400, Neal Murphy wrote:
> What's the '+100' supposed to do?
> What's the '+100' supposed to do?
### Killall and Restore session
started=$(date +%s)
SECONDS=0
started=$(date +%s)
sleep 2
### Time
month=$(date +%B)
mon=$(date +%b)
d_y_t=$(date '+/%d/%Y %T')
done=$(date +%s)
done_2=$SECONDS
### Time
month=$(date +%B)
mon=$(date +%b)
d_y_t=$(date '+/%d/%Y %T')
done=$(date +%s)
((seconds=(done-started)-(((done-started)/60)*60)))
seconds="0$seconds" ### THIS EXPLAINS AND REPLACES THE +100
min_sec=$(((done-started)/60))":"${seconds: -2}
echo
echo "Attended time to restore session: $min_sec"
echo -n "Session restored at " ; printf %9.9s $month ; echo $d_y_t
echo
### THIS IS WHAT I LIKE THE BEST
echo
echo "Attended time to restore session: $min_sec"
echo -n "Session restored at " ; printf %9.9s $month ; echo $d_y_t
echo
((min=(done_2/60))) ; ((sec=(done_2%60)))
echo
printf "Attended time to restore session: %9d:%02d\n" $min $sec
printf "Session restored at %9.9s%s\n" "$month" "$d_y_t"
echo
http://lists.debian.org/debian-user/2012/10/msg01286.html
echo
printf "Attended time to restore session: %9d:%02d\n" $min $sec
printf "Session restored at %9.9s%s\n" "$month" "$d_y_t"
echo
Regards,
Ralf
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Chris Davies
Oct 30, 2012, 4:30:02 AM10/30/12
to
Ralf Mardorf <ralf.m...@alice-dsl.net> wrote:
> month=$(date +%B)
> mon=$(date +%b)
> d_y_t=$(date '+/%d/%Y %T')
> done=$(date +%s)
You've got a horrible race condition in there just waiting to bite
> month=$(date +%B)
> mon=$(date +%b)
> d_y_t=$(date '+/%d/%Y %T')
> done=$(date +%s)
you. Try this instead:
done=$(date +%s)
month=$(date --date @$done +%B)
mon=$(date --date @$done +%b)
d_y_t=$(date --date @$done +'/%d/%Y %T')
Chris
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Ralf Mardorf
Oct 30, 2012, 9:20:02 AM10/30/12
to
On Tue, 30 Oct 2012 08:58:31 +0100, Chris Davies
<chris-...@roaima.co.uk> wrote:
> done=$(date +%s)
> month=$(date --date @$done +%B)
> mon=$(date --date @$done +%b)
> d_y_t=$(date --date @$done +'/%d/%Y %T')
I agree, good idea.
<chris-...@roaima.co.uk> wrote:
> done=$(date +%s)
> month=$(date --date @$done +%B)
> mon=$(date --date @$done +%b)
> d_y_t=$(date --date @$done +'/%d/%Y %T')
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