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#1
12-20-2007
- Original Discussion by silex
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PID length
Does somebody know how many characters can have a PID as maximum? I'm trying to get the PID of another process running in the same machine. I'm doing this: Code:
ps -ef | grep "bin/Alime" | grep -v grep | cut -c10-16 but I don't know if I 'll have enough with six chars. Which is the max value that it can take? thanks in advance |
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#2
12-20-2007
- Original Discussion by silex
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that depends on the maximum number allowed for a PID and it varies from system to system
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#3
12-20-2007
- Original Discussion by silex
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I'm looking for a PIDMAX or something like this, but I can't find anything. This is my system: Code:
ASASTR:include> uname -a OSF1 CLHASASTR V5.1 2650 alpha Thanks again |
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#4
12-20-2007
- Original Discussion by silex
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cannot you just get the whole column instead of relying on character ranges? something like: Code:
ps -ef | grep '[b]in/Alime' | cut -d ' ' -f1 |
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#5
12-20-2007
- Original Discussion by silex
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yes, the whole column would be great. I have tried to get only the second column Code:
ps -ef | grep "bin/Alime" | grep -v grep | cut -f 2 but it shows the whole line again. I don't know why, maybe the command is not correct. thanks |
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#6
12-20-2007
- Original Discussion by silex
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Code:
ps -ef | grep '[b]in/Alime' | cut -d ' ' -f 2 cut's field delimiter is 'tab' by default...... |
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#7
12-20-2007
- Original Discussion by silex
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these are my outputs: Code:
ASASTR:clh> ps -ef | grep "bin/Alime" | grep -v grep clh 221867 217065 0.0 11:34:01 pts/4 0:00.08 /usr/local/clh/ALPHA/oasys/bin/AlimentaLookAhead ASASTR:clh> ps -ef | grep "bin/Alime" | grep -v grep | cut -c10-16 221867 ASASTR:clh> ps -ef | grep "bin/Alime" | grep -v grep | cut -d ' ' -f1 clh ASASTR:clh> ps -ef | grep "bin/Alime" | grep -v grep | cut -d ' ' -f2 ASASTR:clh> ps -ef | grep "bin/Alime" | grep -v grep | cut -f2 clh 221867 217065 0.0 11:34:01 pts/4 0:00.08 /usr/local/clh/ALPHA/oasys/bin/AlimentaLookAhead asking for the first column (-f1) i get the username, but asking for the second (-f2) i get the whole line. Thanks. |
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