Mixing
terminate linux program when lines repeat endlessly
A finance-crunching program I am dealing with, cruncher.js, has annoying bugs difficult to troubleshoot. One common problem (whose triggering input is difficult to pointpoint and therefore avoid) causes this failure scenario:
Downloading account information...
Downloading today orders...
Downloading historical quotes...
Downloading historical quotes...
Downloading historical quotes...
Downloading historical quotes...
Once the line "Downloading historical quotes..." repeats for a third time, I know it's hit an infinite loop and never exits, nor skips whatever input case it can't handle gracefully.
How can I pipe this cruncher.js program to |awk, i.e. what inline awk script would detect in its input a 3rd (or 2nd if much easier) consecutive repeated line, and terminate there?
Or maybe instead of awk, using other common Linux/shell tools?
bash awk pipe infinite-loop
asked Nov 20 '18 at 16:37
MarcosMarcos
2,79433057
add a comment |
A finance-crunching program I am dealing with, cruncher.js, has annoying bugs difficult to troubleshoot. One common problem (whose triggering input is difficult to pointpoint and therefore avoid) causes this failure scenario:
Downloading account information...
Downloading today orders...
Downloading historical quotes...
Downloading historical quotes...
Downloading historical quotes...
Downloading historical quotes...
Once the line "Downloading historical quotes..." repeats for a third time, I know it's hit an infinite loop and never exits, nor skips whatever input case it can't handle gracefully.
How can I pipe this cruncher.js program to |awk, i.e. what inline awk script would detect in its input a 3rd (or 2nd if much easier) consecutive repeated line, and terminate there?
Or maybe instead of awk, using other common Linux/shell tools?
bash awk pipe infinite-loop
asked Nov 20 '18 at 16:37
MarcosMarcos
2,79433057
From another perspective, can you limit on time? because then you would have ready built tools liketimeout 100s commandthat already exists.
– Rocky Li
Nov 20 '18 at 16:44
Yeah, I already do that, timeout 6m crappyScript.js . Only as a stop-gap measure to prevent a server crisis. It's already at the maximum reasonable before being too much time wasted stuck on this bug, while sometimes legitimate runs need more time than that, though.
– Marcos
Nov 20 '18 at 16:51
add a comment |
A finance-crunching program I am dealing with, cruncher.js, has annoying bugs difficult to troubleshoot. One common problem (whose triggering input is difficult to pointpoint and therefore avoid) causes this failure scenario:
Downloading account information...
Downloading today orders...
Downloading historical quotes...
Downloading historical quotes...
Downloading historical quotes...
Downloading historical quotes...
Once the line "Downloading historical quotes..." repeats for a third time, I know it's hit an infinite loop and never exits, nor skips whatever input case it can't handle gracefully.
How can I pipe this cruncher.js program to |awk, i.e. what inline awk script would detect in its input a 3rd (or 2nd if much easier) consecutive repeated line, and terminate there?
Or maybe instead of awk, using other common Linux/shell tools?
bash awk pipe infinite-loop
asked Nov 20 '18 at 16:37
MarcosMarcos
2,79433057
A finance-crunching program I am dealing with, cruncher.js, has annoying bugs difficult to troubleshoot. One common problem (whose triggering input is difficult to pointpoint and therefore avoid) causes this failure scenario:
Downloading account information...
Downloading today orders...
Downloading historical quotes...
Downloading historical quotes...
Downloading historical quotes...
Downloading historical quotes...
Once the line "Downloading historical quotes..." repeats for a third time, I know it's hit an infinite loop and never exits, nor skips whatever input case it can't handle gracefully.
How can I pipe this cruncher.js program to |awk, i.e. what inline awk script would detect in its input a 3rd (or 2nd if much easier) consecutive repeated line, and terminate there?
Or maybe instead of awk, using other common Linux/shell tools?
bash awk pipe infinite-loop
bash awk pipe infinite-loop
asked Nov 20 '18 at 16:37
MarcosMarcos
2,79433057
asked Nov 20 '18 at 16:37
MarcosMarcos
2,79433057
asked Nov 20 '18 at 16:37
MarcosMarcos
2,79433057
asked Nov 20 '18 at 16:37
MarcosMarcos
2,79433057
asked Nov 20 '18 at 16:37
MarcosMarcos
2,79433057
2,79433057
From another perspective, can you limit on time? because then you would have ready built tools liketimeout 100s commandthat already exists.
– Rocky Li
Nov 20 '18 at 16:44
Yeah, I already do that, timeout 6m crappyScript.js . Only as a stop-gap measure to prevent a server crisis. It's already at the maximum reasonable before being too much time wasted stuck on this bug, while sometimes legitimate runs need more time than that, though.
– Marcos
Nov 20 '18 at 16:51
add a comment |
From another perspective, can you limit on time? because then you would have ready built tools liketimeout 100s commandthat already exists.
– Rocky Li
Nov 20 '18 at 16:44
Yeah, I already do that, timeout 6m crappyScript.js . Only as a stop-gap measure to prevent a server crisis. It's already at the maximum reasonable before being too much time wasted stuck on this bug, while sometimes legitimate runs need more time than that, though.
– Marcos
Nov 20 '18 at 16:51
From another perspective, can you limit on time? because then you would have ready built tools like
timeout 100s command that already exists.– Rocky Li
Nov 20 '18 at 16:44
From another perspective, can you limit on time? because then you would have ready built tools like
timeout 100s command that already exists.– Rocky Li
Nov 20 '18 at 16:44
Yeah, I already do that, timeout 6m crappyScript.js . Only as a stop-gap measure to prevent a server crisis. It's already at the maximum reasonable before being too much time wasted stuck on this bug, while sometimes legitimate runs need more time than that, though.
– Marcos
Nov 20 '18 at 16:51
Yeah, I already do that, timeout 6m crappyScript.js . Only as a stop-gap measure to prevent a server crisis. It's already at the maximum reasonable before being too much time wasted stuck on this bug, while sometimes legitimate runs need more time than that, though.
– Marcos
Nov 20 '18 at 16:51
add a comment |
1 Answer
1
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oldest
votes
here is one way
$ yes | awk -v key='y' '{if($0==key)c++; else c=0} c==3{exit}1'
y
y
replace the key value with your repeated value; and yes with your stream generator.
answered Nov 20 '18 at 16:47
karakfakarakfa
49k52738
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
here is one way
$ yes | awk -v key='y' '{if($0==key)c++; else c=0} c==3{exit}1'
y
y
replace the key value with your repeated value; and yes with your stream generator.
answered Nov 20 '18 at 16:47
karakfakarakfa
49k52738
add a comment |
here is one way
$ yes | awk -v key='y' '{if($0==key)c++; else c=0} c==3{exit}1'
y
y
replace the key value with your repeated value; and yes with your stream generator.
answered Nov 20 '18 at 16:47
karakfakarakfa
49k52738
add a comment |
here is one way
$ yes | awk -v key='y' '{if($0==key)c++; else c=0} c==3{exit}1'
y
y
replace the key value with your repeated value; and yes with your stream generator.
answered Nov 20 '18 at 16:47
karakfakarakfa
49k52738
here is one way
$ yes | awk -v key='y' '{if($0==key)c++; else c=0} c==3{exit}1'
y
y
replace the key value with your repeated value; and yes with your stream generator.
answered Nov 20 '18 at 16:47
karakfakarakfa
49k52738
answered Nov 20 '18 at 16:47
karakfakarakfa
49k52738
answered Nov 20 '18 at 16:47
karakfakarakfa
49k52738
answered Nov 20 '18 at 16:47
karakfakarakfa
49k52738
49k52738
add a comment |
add a comment |
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From another perspective, can you limit on time? because then you would have ready built tools like
timeout 100s commandthat already exists.– Rocky Li
Nov 20 '18 at 16:44
Yeah, I already do that, timeout 6m crappyScript.js . Only as a stop-gap measure to prevent a server crisis. It's already at the maximum reasonable before being too much time wasted stuck on this bug, while sometimes legitimate runs need more time than that, though.
– Marcos
Nov 20 '18 at 16:51