How can I parse the output of `ps` to different fields?
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I would like to parse the output of ps, to get any field using awk. It seems that ps separate the fields by whitespaces, but the values in COMMAND field usually have whitespaces.
Is there a way to tell ps to use some distinctive field separator in its output? I haven't found one in ps manpage.
If not, what can I do to get the values in a field? Thanks.
text-processing awk ps
asked Dec 4 at 21:11
Tim
25.4k73243447
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up vote
0
down vote
favorite
I would like to parse the output of ps, to get any field using awk. It seems that ps separate the fields by whitespaces, but the values in COMMAND field usually have whitespaces.
Is there a way to tell ps to use some distinctive field separator in its output? I haven't found one in ps manpage.
If not, what can I do to get the values in a field? Thanks.
text-processing awk ps
asked Dec 4 at 21:11
Tim
25.4k73243447
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I would like to parse the output of ps, to get any field using awk. It seems that ps separate the fields by whitespaces, but the values in COMMAND field usually have whitespaces.
Is there a way to tell ps to use some distinctive field separator in its output? I haven't found one in ps manpage.
If not, what can I do to get the values in a field? Thanks.
text-processing awk ps
asked Dec 4 at 21:11
Tim
25.4k73243447
I would like to parse the output of ps, to get any field using awk. It seems that ps separate the fields by whitespaces, but the values in COMMAND field usually have whitespaces.
Is there a way to tell ps to use some distinctive field separator in its output? I haven't found one in ps manpage.
If not, what can I do to get the values in a field? Thanks.
text-processing awk ps
text-processing awk ps
asked Dec 4 at 21:11
Tim
25.4k73243447
asked Dec 4 at 21:11
Tim
25.4k73243447
edited Dec 4 at 21:27
asked Dec 4 at 21:11
Tim
25.4k73243447
asked Dec 4 at 21:11
Tim
25.4k73243447
asked Dec 4 at 21:11
Tim
25.4k73243447
25.4k73243447
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add a comment |
3 Answers
3
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1
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You can first replace multiple spaces with a single space (or any other character). See this question on how to accomplish this. Next you can use cut to select the column(s) you want. See also this question.
answered Dec 4 at 21:14
Tom
1217
Thanks. Does ps always separate two fields by more than one whitespaces? Does a value underCOMMANDnever contain more than one consecutive whitespaces?
– Tim
Dec 4 at 21:15
Not sure about that one.
– Tom
Dec 4 at 21:16
add a comment |
up vote
1
down vote
You can explicitly specify your own field separator in the format string argument when utilizing a printf() style user-defined output:
$ ps -o '%p,%a,%c,%y'
PID,COMMAND ,COMMAND ,TTY
15742,ps -o %p,%a,%c,%y ,ps ,pts/6
24719,-su ,bash ,pts/6
answered Dec 4 at 21:33
Derek Callaway
743
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up vote
1
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You could make use of the fact that a shell read places ALL residual fields into the last variable, and print COMMAND last.
ps -eo pid,cmd,tty,args | while read PID CMD TTY ARG; do echo $PID $CMD $TTY $ARG; done
You can convey $ARG to awk, or else concatenate $4 ... $NF within awk when reading the ps output directly
answered Dec 4 at 22:06
RudiC
3,8891312
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
You can first replace multiple spaces with a single space (or any other character). See this question on how to accomplish this. Next you can use cut to select the column(s) you want. See also this question.
answered Dec 4 at 21:14
Tom
1217
Thanks. Does ps always separate two fields by more than one whitespaces? Does a value underCOMMANDnever contain more than one consecutive whitespaces?
– Tim
Dec 4 at 21:15
Not sure about that one.
– Tom
Dec 4 at 21:16
add a comment |
up vote
1
down vote
You can first replace multiple spaces with a single space (or any other character). See this question on how to accomplish this. Next you can use cut to select the column(s) you want. See also this question.
answered Dec 4 at 21:14
Tom
1217
Thanks. Does ps always separate two fields by more than one whitespaces? Does a value underCOMMANDnever contain more than one consecutive whitespaces?
– Tim
Dec 4 at 21:15
Not sure about that one.
– Tom
Dec 4 at 21:16
add a comment |
up vote
1
down vote
up vote
1
down vote
You can first replace multiple spaces with a single space (or any other character). See this question on how to accomplish this. Next you can use cut to select the column(s) you want. See also this question.
answered Dec 4 at 21:14
Tom
1217
You can first replace multiple spaces with a single space (or any other character). See this question on how to accomplish this. Next you can use cut to select the column(s) you want. See also this question.
answered Dec 4 at 21:14
Tom
1217
answered Dec 4 at 21:14
Tom
1217
answered Dec 4 at 21:14
Tom
1217
answered Dec 4 at 21:14
Tom
1217
1217
Thanks. Does ps always separate two fields by more than one whitespaces? Does a value underCOMMANDnever contain more than one consecutive whitespaces?
– Tim
Dec 4 at 21:15
Not sure about that one.
– Tom
Dec 4 at 21:16
add a comment |
Thanks. Does ps always separate two fields by more than one whitespaces? Does a value underCOMMANDnever contain more than one consecutive whitespaces?
– Tim
Dec 4 at 21:15
Not sure about that one.
– Tom
Dec 4 at 21:16
Thanks. Does ps always separate two fields by more than one whitespaces? Does a value under
COMMAND never contain more than one consecutive whitespaces?– Tim
Dec 4 at 21:15
Thanks. Does ps always separate two fields by more than one whitespaces? Does a value under
COMMAND never contain more than one consecutive whitespaces?– Tim
Dec 4 at 21:15
Not sure about that one.
– Tom
Dec 4 at 21:16
Not sure about that one.
– Tom
Dec 4 at 21:16
add a comment |
up vote
1
down vote
You can explicitly specify your own field separator in the format string argument when utilizing a printf() style user-defined output:
$ ps -o '%p,%a,%c,%y'
PID,COMMAND ,COMMAND ,TTY
15742,ps -o %p,%a,%c,%y ,ps ,pts/6
24719,-su ,bash ,pts/6
answered Dec 4 at 21:33
Derek Callaway
743
add a comment |
up vote
1
down vote
You can explicitly specify your own field separator in the format string argument when utilizing a printf() style user-defined output:
$ ps -o '%p,%a,%c,%y'
PID,COMMAND ,COMMAND ,TTY
15742,ps -o %p,%a,%c,%y ,ps ,pts/6
24719,-su ,bash ,pts/6
answered Dec 4 at 21:33
Derek Callaway
743
add a comment |
up vote
1
down vote
up vote
1
down vote
You can explicitly specify your own field separator in the format string argument when utilizing a printf() style user-defined output:
$ ps -o '%p,%a,%c,%y'
PID,COMMAND ,COMMAND ,TTY
15742,ps -o %p,%a,%c,%y ,ps ,pts/6
24719,-su ,bash ,pts/6
answered Dec 4 at 21:33
Derek Callaway
743
You can explicitly specify your own field separator in the format string argument when utilizing a printf() style user-defined output:
$ ps -o '%p,%a,%c,%y'
PID,COMMAND ,COMMAND ,TTY
15742,ps -o %p,%a,%c,%y ,ps ,pts/6
24719,-su ,bash ,pts/6
answered Dec 4 at 21:33
Derek Callaway
743
answered Dec 4 at 21:33
Derek Callaway
743
answered Dec 4 at 21:33
Derek Callaway
743
answered Dec 4 at 21:33
Derek Callaway
743
743
add a comment |
add a comment |
up vote
1
down vote
You could make use of the fact that a shell read places ALL residual fields into the last variable, and print COMMAND last.
ps -eo pid,cmd,tty,args | while read PID CMD TTY ARG; do echo $PID $CMD $TTY $ARG; done
You can convey $ARG to awk, or else concatenate $4 ... $NF within awk when reading the ps output directly
answered Dec 4 at 22:06
RudiC
3,8891312
add a comment |
up vote
1
down vote
You could make use of the fact that a shell read places ALL residual fields into the last variable, and print COMMAND last.
ps -eo pid,cmd,tty,args | while read PID CMD TTY ARG; do echo $PID $CMD $TTY $ARG; done
You can convey $ARG to awk, or else concatenate $4 ... $NF within awk when reading the ps output directly
answered Dec 4 at 22:06
RudiC
3,8891312
add a comment |
up vote
1
down vote
up vote
1
down vote
You could make use of the fact that a shell read places ALL residual fields into the last variable, and print COMMAND last.
ps -eo pid,cmd,tty,args | while read PID CMD TTY ARG; do echo $PID $CMD $TTY $ARG; done
You can convey $ARG to awk, or else concatenate $4 ... $NF within awk when reading the ps output directly
answered Dec 4 at 22:06
RudiC
3,8891312
You could make use of the fact that a shell read places ALL residual fields into the last variable, and print COMMAND last.
ps -eo pid,cmd,tty,args | while read PID CMD TTY ARG; do echo $PID $CMD $TTY $ARG; done
You can convey $ARG to awk, or else concatenate $4 ... $NF within awk when reading the ps output directly
answered Dec 4 at 22:06
RudiC
3,8891312
answered Dec 4 at 22:06
RudiC
3,8891312
answered Dec 4 at 22:06
RudiC
3,8891312
answered Dec 4 at 22:06
RudiC
3,8891312
3,8891312
add a comment |
add a comment |
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