while loop comparing two numbers from a string
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I'm trying to create a simple bash script to run through a loop until size1=size2
I have a variable that I'm trying to extract size1 and size2
strvar=Size: 367.3 MiB/367.3 MiB Time: 2.04
can I use parameter expansion to extract just the numbers on each side of the "/" and split into two variables (size1,size2)? It's ok if the MiB stays as long as I can evaluate if size1 is the same as size2.
the variable $strvar is the output from a command. I use strvar=$(command | grep Size) to get it.
bash shell-script
edited Dec 8 at 12:42
RudiC
3,9541312
asked Dec 7 at 23:14
Bender
1
add a comment |
up vote
-1
down vote
favorite
I'm trying to create a simple bash script to run through a loop until size1=size2
I have a variable that I'm trying to extract size1 and size2
strvar=Size: 367.3 MiB/367.3 MiB Time: 2.04
can I use parameter expansion to extract just the numbers on each side of the "/" and split into two variables (size1,size2)? It's ok if the MiB stays as long as I can evaluate if size1 is the same as size2.
the variable $strvar is the output from a command. I use strvar=$(command | grep Size) to get it.
bash shell-script
edited Dec 8 at 12:42
RudiC
3,9541312
asked Dec 7 at 23:14
Bender
1
Where does the string come from and why do you have it in a variable? If it's the output of a program, then the check could be done directly in a pipeline, reading from that program, depending on what it is you'd like to achieve.
– Kusalananda
Dec 7 at 23:18
add a comment |
up vote
-1
down vote
favorite
up vote
-1
down vote
favorite
I'm trying to create a simple bash script to run through a loop until size1=size2
I have a variable that I'm trying to extract size1 and size2
strvar=Size: 367.3 MiB/367.3 MiB Time: 2.04
can I use parameter expansion to extract just the numbers on each side of the "/" and split into two variables (size1,size2)? It's ok if the MiB stays as long as I can evaluate if size1 is the same as size2.
the variable $strvar is the output from a command. I use strvar=$(command | grep Size) to get it.
bash shell-script
edited Dec 8 at 12:42
RudiC
3,9541312
asked Dec 7 at 23:14
Bender
1
I'm trying to create a simple bash script to run through a loop until size1=size2
I have a variable that I'm trying to extract size1 and size2
strvar=Size: 367.3 MiB/367.3 MiB Time: 2.04
can I use parameter expansion to extract just the numbers on each side of the "/" and split into two variables (size1,size2)? It's ok if the MiB stays as long as I can evaluate if size1 is the same as size2.
the variable $strvar is the output from a command. I use strvar=$(command | grep Size) to get it.
bash shell-script
bash shell-script
edited Dec 8 at 12:42
RudiC
3,9541312
asked Dec 7 at 23:14
Bender
1
edited Dec 8 at 12:42
RudiC
3,9541312
asked Dec 7 at 23:14
Bender
1
edited Dec 8 at 12:42
RudiC
3,9541312
edited Dec 8 at 12:42
RudiC
3,9541312
edited Dec 8 at 12:42
RudiC
3,9541312
3,9541312
asked Dec 7 at 23:14
Bender
1
asked Dec 7 at 23:14
Bender
1
asked Dec 7 at 23:14
Bender
1
1
Where does the string come from and why do you have it in a variable? If it's the output of a program, then the check could be done directly in a pipeline, reading from that program, depending on what it is you'd like to achieve.
– Kusalananda
Dec 7 at 23:18
add a comment |
Where does the string come from and why do you have it in a variable? If it's the output of a program, then the check could be done directly in a pipeline, reading from that program, depending on what it is you'd like to achieve.
– Kusalananda
Dec 7 at 23:18
Where does the string come from and why do you have it in a variable? If it's the output of a program, then the check could be done directly in a pipeline, reading from that program, depending on what it is you'd like to achieve.
– Kusalananda
Dec 7 at 23:18
Where does the string come from and why do you have it in a variable? If it's the output of a program, then the check could be done directly in a pipeline, reading from that program, depending on what it is you'd like to achieve.
– Kusalananda
Dec 7 at 23:18
add a comment |
1 Answer
1
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oldest
votes
up vote
0
down vote
How about
read size1 unit1 size2 unit2 <<< $(command | sed -n '/Size/ s/^[^ ]* //; s/ Time:.*$//; s#/# #; p')
?
answered Dec 8 at 12:48
RudiC
3,9541312
1
Just FYI, @RudiC (and feel free to flag this as "no longer necessary"), some of your answers are showing up in the "low quality" review queue, likely because the post is largely code. If you provide a bit of commentary to explain what the code is doing, you'll be at less risk of someone voting to delete the answer. On a side note, my (opinion/suggestion) would be to rephrase the text to be more of a statement than a question. It could confuse someone who's reviewing too quickly and thinks you're asking a question of the OP instead of answering. Thanks!
– Jeff Schaller
Dec 8 at 13:44
Thanks @Jeff Schaller for these hints. I acknowledge there may be (unwritten) rules in these fora, but there's a (my?) personal approach / style as well. Not feeling too comfortable discussing via comments, and not knowing the ropes in here - is there a forum / room for such discussion?
– RudiC
Dec 8 at 16:51
There is a U&L chat room, at chat.stackexchange.com/rooms/26/dev-chat . It's occasionally busy, but often quiet. I think there may also be a way to create a separate room, although I'm not as familiar with that. Feel free to ping me in chat (join the room, then send something @JeffSchaller) if you'd like to discuss anything further!
– Jeff Schaller
Dec 8 at 18:10
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
up vote
0
down vote
How about
read size1 unit1 size2 unit2 <<< $(command | sed -n '/Size/ s/^[^ ]* //; s/ Time:.*$//; s#/# #; p')
?
answered Dec 8 at 12:48
RudiC
3,9541312
1
Just FYI, @RudiC (and feel free to flag this as "no longer necessary"), some of your answers are showing up in the "low quality" review queue, likely because the post is largely code. If you provide a bit of commentary to explain what the code is doing, you'll be at less risk of someone voting to delete the answer. On a side note, my (opinion/suggestion) would be to rephrase the text to be more of a statement than a question. It could confuse someone who's reviewing too quickly and thinks you're asking a question of the OP instead of answering. Thanks!
– Jeff Schaller
Dec 8 at 13:44
Thanks @Jeff Schaller for these hints. I acknowledge there may be (unwritten) rules in these fora, but there's a (my?) personal approach / style as well. Not feeling too comfortable discussing via comments, and not knowing the ropes in here - is there a forum / room for such discussion?
– RudiC
Dec 8 at 16:51
There is a U&L chat room, at chat.stackexchange.com/rooms/26/dev-chat . It's occasionally busy, but often quiet. I think there may also be a way to create a separate room, although I'm not as familiar with that. Feel free to ping me in chat (join the room, then send something @JeffSchaller) if you'd like to discuss anything further!
– Jeff Schaller
Dec 8 at 18:10
add a comment |
up vote
0
down vote
How about
read size1 unit1 size2 unit2 <<< $(command | sed -n '/Size/ s/^[^ ]* //; s/ Time:.*$//; s#/# #; p')
?
answered Dec 8 at 12:48
RudiC
3,9541312
1
Just FYI, @RudiC (and feel free to flag this as "no longer necessary"), some of your answers are showing up in the "low quality" review queue, likely because the post is largely code. If you provide a bit of commentary to explain what the code is doing, you'll be at less risk of someone voting to delete the answer. On a side note, my (opinion/suggestion) would be to rephrase the text to be more of a statement than a question. It could confuse someone who's reviewing too quickly and thinks you're asking a question of the OP instead of answering. Thanks!
– Jeff Schaller
Dec 8 at 13:44
Thanks @Jeff Schaller for these hints. I acknowledge there may be (unwritten) rules in these fora, but there's a (my?) personal approach / style as well. Not feeling too comfortable discussing via comments, and not knowing the ropes in here - is there a forum / room for such discussion?
– RudiC
Dec 8 at 16:51
There is a U&L chat room, at chat.stackexchange.com/rooms/26/dev-chat . It's occasionally busy, but often quiet. I think there may also be a way to create a separate room, although I'm not as familiar with that. Feel free to ping me in chat (join the room, then send something @JeffSchaller) if you'd like to discuss anything further!
– Jeff Schaller
Dec 8 at 18:10
add a comment |
up vote
0
down vote
up vote
0
down vote
How about
read size1 unit1 size2 unit2 <<< $(command | sed -n '/Size/ s/^[^ ]* //; s/ Time:.*$//; s#/# #; p')
?
answered Dec 8 at 12:48
RudiC
3,9541312
How about
read size1 unit1 size2 unit2 <<< $(command | sed -n '/Size/ s/^[^ ]* //; s/ Time:.*$//; s#/# #; p')
?
answered Dec 8 at 12:48
RudiC
3,9541312
answered Dec 8 at 12:48
RudiC
3,9541312
answered Dec 8 at 12:48
RudiC
3,9541312
answered Dec 8 at 12:48
RudiC
3,9541312
3,9541312
1
Just FYI, @RudiC (and feel free to flag this as "no longer necessary"), some of your answers are showing up in the "low quality" review queue, likely because the post is largely code. If you provide a bit of commentary to explain what the code is doing, you'll be at less risk of someone voting to delete the answer. On a side note, my (opinion/suggestion) would be to rephrase the text to be more of a statement than a question. It could confuse someone who's reviewing too quickly and thinks you're asking a question of the OP instead of answering. Thanks!
– Jeff Schaller
Dec 8 at 13:44
Thanks @Jeff Schaller for these hints. I acknowledge there may be (unwritten) rules in these fora, but there's a (my?) personal approach / style as well. Not feeling too comfortable discussing via comments, and not knowing the ropes in here - is there a forum / room for such discussion?
– RudiC
Dec 8 at 16:51
There is a U&L chat room, at chat.stackexchange.com/rooms/26/dev-chat . It's occasionally busy, but often quiet. I think there may also be a way to create a separate room, although I'm not as familiar with that. Feel free to ping me in chat (join the room, then send something @JeffSchaller) if you'd like to discuss anything further!
– Jeff Schaller
Dec 8 at 18:10
add a comment |
1
Just FYI, @RudiC (and feel free to flag this as "no longer necessary"), some of your answers are showing up in the "low quality" review queue, likely because the post is largely code. If you provide a bit of commentary to explain what the code is doing, you'll be at less risk of someone voting to delete the answer. On a side note, my (opinion/suggestion) would be to rephrase the text to be more of a statement than a question. It could confuse someone who's reviewing too quickly and thinks you're asking a question of the OP instead of answering. Thanks!
– Jeff Schaller
Dec 8 at 13:44
Thanks @Jeff Schaller for these hints. I acknowledge there may be (unwritten) rules in these fora, but there's a (my?) personal approach / style as well. Not feeling too comfortable discussing via comments, and not knowing the ropes in here - is there a forum / room for such discussion?
– RudiC
Dec 8 at 16:51
There is a U&L chat room, at chat.stackexchange.com/rooms/26/dev-chat . It's occasionally busy, but often quiet. I think there may also be a way to create a separate room, although I'm not as familiar with that. Feel free to ping me in chat (join the room, then send something @JeffSchaller) if you'd like to discuss anything further!
– Jeff Schaller
Dec 8 at 18:10
1
1
Just FYI, @RudiC (and feel free to flag this as "no longer necessary"), some of your answers are showing up in the "low quality" review queue, likely because the post is largely code. If you provide a bit of commentary to explain what the code is doing, you'll be at less risk of someone voting to delete the answer. On a side note, my (opinion/suggestion) would be to rephrase the text to be more of a statement than a question. It could confuse someone who's reviewing too quickly and thinks you're asking a question of the OP instead of answering. Thanks!
– Jeff Schaller
Dec 8 at 13:44
Just FYI, @RudiC (and feel free to flag this as "no longer necessary"), some of your answers are showing up in the "low quality" review queue, likely because the post is largely code. If you provide a bit of commentary to explain what the code is doing, you'll be at less risk of someone voting to delete the answer. On a side note, my (opinion/suggestion) would be to rephrase the text to be more of a statement than a question. It could confuse someone who's reviewing too quickly and thinks you're asking a question of the OP instead of answering. Thanks!
– Jeff Schaller
Dec 8 at 13:44
Thanks @Jeff Schaller for these hints. I acknowledge there may be (unwritten) rules in these fora, but there's a (my?) personal approach / style as well. Not feeling too comfortable discussing via comments, and not knowing the ropes in here - is there a forum / room for such discussion?
– RudiC
Dec 8 at 16:51
Thanks @Jeff Schaller for these hints. I acknowledge there may be (unwritten) rules in these fora, but there's a (my?) personal approach / style as well. Not feeling too comfortable discussing via comments, and not knowing the ropes in here - is there a forum / room for such discussion?
– RudiC
Dec 8 at 16:51
There is a U&L chat room, at chat.stackexchange.com/rooms/26/dev-chat . It's occasionally busy, but often quiet. I think there may also be a way to create a separate room, although I'm not as familiar with that. Feel free to ping me in chat (join the room, then send something @JeffSchaller) if you'd like to discuss anything further!
– Jeff Schaller
Dec 8 at 18:10
There is a U&L chat room, at chat.stackexchange.com/rooms/26/dev-chat . It's occasionally busy, but often quiet. I think there may also be a way to create a separate room, although I'm not as familiar with that. Feel free to ping me in chat (join the room, then send something @JeffSchaller) if you'd like to discuss anything further!
– Jeff Schaller
Dec 8 at 18:10
add a comment |
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Where does the string come from and why do you have it in a variable? If it's the output of a program, then the check could be done directly in a pipeline, reading from that program, depending on what it is you'd like to achieve.
– Kusalananda
Dec 7 at 23:18