Why does my while loop ignore the condition and keep going forever?
I have the following bash script which is supposed to record temperature data of my 2 cpu cores and send it to a file until the file is 10000 lines long, however the 10000 line while loop condition is not doing anything and it keeps going past 10000 lines. Can anyone see why it would do that?
lc=`wc -l temps.log2 | grep -o '[0-9]*'`
while [ $lc -lt 10000 ]
do
sensors | grep ^Core |
(
DATE=$(date +%m/%d/%y-%H:%M:%S)
while read LINE
do
echo "$DATE $LINE"
done
) >> temps.log2
done
bash
edited 1 hour ago
Rui F Ribeiro
39.6k1479132
asked Nov 26 '16 at 4:54
wes1099wes1099
2015
add a comment |
I have the following bash script which is supposed to record temperature data of my 2 cpu cores and send it to a file until the file is 10000 lines long, however the 10000 line while loop condition is not doing anything and it keeps going past 10000 lines. Can anyone see why it would do that?
lc=`wc -l temps.log2 | grep -o '[0-9]*'`
while [ $lc -lt 10000 ]
do
sensors | grep ^Core |
(
DATE=$(date +%m/%d/%y-%H:%M:%S)
while read LINE
do
echo "$DATE $LINE"
done
) >> temps.log2
done
bash
edited 1 hour ago
Rui F Ribeiro
39.6k1479132
asked Nov 26 '16 at 4:54
wes1099wes1099
2015
add a comment |
I have the following bash script which is supposed to record temperature data of my 2 cpu cores and send it to a file until the file is 10000 lines long, however the 10000 line while loop condition is not doing anything and it keeps going past 10000 lines. Can anyone see why it would do that?
lc=`wc -l temps.log2 | grep -o '[0-9]*'`
while [ $lc -lt 10000 ]
do
sensors | grep ^Core |
(
DATE=$(date +%m/%d/%y-%H:%M:%S)
while read LINE
do
echo "$DATE $LINE"
done
) >> temps.log2
done
bash
edited 1 hour ago
Rui F Ribeiro
39.6k1479132
asked Nov 26 '16 at 4:54
wes1099wes1099
2015
I have the following bash script which is supposed to record temperature data of my 2 cpu cores and send it to a file until the file is 10000 lines long, however the 10000 line while loop condition is not doing anything and it keeps going past 10000 lines. Can anyone see why it would do that?
lc=`wc -l temps.log2 | grep -o '[0-9]*'`
while [ $lc -lt 10000 ]
do
sensors | grep ^Core |
(
DATE=$(date +%m/%d/%y-%H:%M:%S)
while read LINE
do
echo "$DATE $LINE"
done
) >> temps.log2
done
bash
bash
edited 1 hour ago
Rui F Ribeiro
39.6k1479132
asked Nov 26 '16 at 4:54
wes1099wes1099
2015
edited 1 hour ago
Rui F Ribeiro
39.6k1479132
asked Nov 26 '16 at 4:54
wes1099wes1099
2015
edited 1 hour ago
Rui F Ribeiro
39.6k1479132
edited 1 hour ago
Rui F Ribeiro
39.6k1479132
edited 1 hour ago
Rui F Ribeiro
39.6k1479132
39.6k1479132
asked Nov 26 '16 at 4:54
wes1099wes1099
2015
asked Nov 26 '16 at 4:54
wes1099wes1099
2015
asked Nov 26 '16 at 4:54
wes1099wes1099
2015
2015
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
$lc isn't being incremented in the loop
answered Nov 26 '16 at 5:06
John KerlJohn Kerl
1465
wait, now it is sayingtemplogv2.sh: 2: [: 1: unexpected operatorand all i did was copy the first line and put it inside the while loop.
– wes1099
Nov 26 '16 at 5:49
im a moron again. my grep statement was returning more than what I wanted it to.
– wes1099
Nov 26 '16 at 6:06
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
$lc isn't being incremented in the loop
answered Nov 26 '16 at 5:06
John KerlJohn Kerl
1465
wait, now it is sayingtemplogv2.sh: 2: [: 1: unexpected operatorand all i did was copy the first line and put it inside the while loop.
– wes1099
Nov 26 '16 at 5:49
im a moron again. my grep statement was returning more than what I wanted it to.
– wes1099
Nov 26 '16 at 6:06
add a comment |
$lc isn't being incremented in the loop
answered Nov 26 '16 at 5:06
John KerlJohn Kerl
1465
wait, now it is sayingtemplogv2.sh: 2: [: 1: unexpected operatorand all i did was copy the first line and put it inside the while loop.
– wes1099
Nov 26 '16 at 5:49
im a moron again. my grep statement was returning more than what I wanted it to.
– wes1099
Nov 26 '16 at 6:06
add a comment |
$lc isn't being incremented in the loop
answered Nov 26 '16 at 5:06
John KerlJohn Kerl
1465
$lc isn't being incremented in the loop
answered Nov 26 '16 at 5:06
John KerlJohn Kerl
1465
answered Nov 26 '16 at 5:06
John KerlJohn Kerl
1465
answered Nov 26 '16 at 5:06
John KerlJohn Kerl
1465
answered Nov 26 '16 at 5:06
John KerlJohn Kerl
1465
1465
wait, now it is sayingtemplogv2.sh: 2: [: 1: unexpected operatorand all i did was copy the first line and put it inside the while loop.
– wes1099
Nov 26 '16 at 5:49
im a moron again. my grep statement was returning more than what I wanted it to.
– wes1099
Nov 26 '16 at 6:06
add a comment |
wait, now it is sayingtemplogv2.sh: 2: [: 1: unexpected operatorand all i did was copy the first line and put it inside the while loop.
– wes1099
Nov 26 '16 at 5:49
im a moron again. my grep statement was returning more than what I wanted it to.
– wes1099
Nov 26 '16 at 6:06
wait, now it is saying
templogv2.sh: 2: [: 1: unexpected operator and all i did was copy the first line and put it inside the while loop.– wes1099
Nov 26 '16 at 5:49
wait, now it is saying
templogv2.sh: 2: [: 1: unexpected operator and all i did was copy the first line and put it inside the while loop.– wes1099
Nov 26 '16 at 5:49
im a moron again. my grep statement was returning more than what I wanted it to.
– wes1099
Nov 26 '16 at 6:06
im a moron again. my grep statement was returning more than what I wanted it to.
– wes1099
Nov 26 '16 at 6:06
add a comment |
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