Integrate awk one-liner into awk script?
up vote
0
down vote
favorite
If I have this one-liner
$ echo 0123456789ab | awk '{gsub(/..B/,"&:")}1'
01:23:45:67:89:ab
which I would like to use in an awk script, and therefore tries
cat $hosts | awk '{
print "host "$5" {"
print " option host-name ""$5"";"
print " hardware ethernet "$3";"
x = {gsub(/..B/,"&:")}1
print " fixed-address "print x";"
print "}"
print ""
}' > /etc/dhcp/reservations.conf
but it fails with
awk: cmd. line:5: x = {gsub(/..B/,"&:")}1
awk: cmd. line:5: ^ syntax error
awk: cmd. line:6: print " fixed-address "print x";"
awk: cmd. line:6: ^ syntax error
Question
Does anyone know how to integrate such one-liners into an awk script?
linux awk
edited Nov 12 at 11:10
Inian
38.4k63669
asked Nov 12 at 10:43
Sandra Schlichting
9,0652677125
add a comment |
up vote
0
down vote
favorite
If I have this one-liner
$ echo 0123456789ab | awk '{gsub(/..B/,"&:")}1'
01:23:45:67:89:ab
which I would like to use in an awk script, and therefore tries
cat $hosts | awk '{
print "host "$5" {"
print " option host-name ""$5"";"
print " hardware ethernet "$3";"
x = {gsub(/..B/,"&:")}1
print " fixed-address "print x";"
print "}"
print ""
}' > /etc/dhcp/reservations.conf
but it fails with
awk: cmd. line:5: x = {gsub(/..B/,"&:")}1
awk: cmd. line:5: ^ syntax error
awk: cmd. line:6: print " fixed-address "print x";"
awk: cmd. line:6: ^ syntax error
Question
Does anyone know how to integrate such one-liners into an awk script?
linux awk
edited Nov 12 at 11:10
Inian
38.4k63669
asked Nov 12 at 10:43
Sandra Schlichting
9,0652677125
What is your input file?
– Inian
Nov 12 at 10:48
You should remove the{around thegsubcommand as this is not a one-liner anymore (and maybe remove the1entirely)
– Aserre
Nov 12 at 10:49
@Sandra Schlichting, you need NOT to usecatwithawk,awkcould read files by itself too.
– RavinderSingh13
Nov 12 at 11:00
Show us the input file you are working with? What is the value that you want togsub()on? What is the expected output
– Inian
Nov 12 at 11:11
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
If I have this one-liner
$ echo 0123456789ab | awk '{gsub(/..B/,"&:")}1'
01:23:45:67:89:ab
which I would like to use in an awk script, and therefore tries
cat $hosts | awk '{
print "host "$5" {"
print " option host-name ""$5"";"
print " hardware ethernet "$3";"
x = {gsub(/..B/,"&:")}1
print " fixed-address "print x";"
print "}"
print ""
}' > /etc/dhcp/reservations.conf
but it fails with
awk: cmd. line:5: x = {gsub(/..B/,"&:")}1
awk: cmd. line:5: ^ syntax error
awk: cmd. line:6: print " fixed-address "print x";"
awk: cmd. line:6: ^ syntax error
Question
Does anyone know how to integrate such one-liners into an awk script?
linux awk
edited Nov 12 at 11:10
Inian
38.4k63669
asked Nov 12 at 10:43
Sandra Schlichting
9,0652677125
If I have this one-liner
$ echo 0123456789ab | awk '{gsub(/..B/,"&:")}1'
01:23:45:67:89:ab
which I would like to use in an awk script, and therefore tries
cat $hosts | awk '{
print "host "$5" {"
print " option host-name ""$5"";"
print " hardware ethernet "$3";"
x = {gsub(/..B/,"&:")}1
print " fixed-address "print x";"
print "}"
print ""
}' > /etc/dhcp/reservations.conf
but it fails with
awk: cmd. line:5: x = {gsub(/..B/,"&:")}1
awk: cmd. line:5: ^ syntax error
awk: cmd. line:6: print " fixed-address "print x";"
awk: cmd. line:6: ^ syntax error
Question
Does anyone know how to integrate such one-liners into an awk script?
linux awk
linux awk
edited Nov 12 at 11:10
Inian
38.4k63669
asked Nov 12 at 10:43
Sandra Schlichting
9,0652677125
edited Nov 12 at 11:10
Inian
38.4k63669
asked Nov 12 at 10:43
Sandra Schlichting
9,0652677125
edited Nov 12 at 11:10
Inian
38.4k63669
edited Nov 12 at 11:10
Inian
38.4k63669
edited Nov 12 at 11:10
Inian
38.4k63669
38.4k63669
asked Nov 12 at 10:43
Sandra Schlichting
9,0652677125
asked Nov 12 at 10:43
Sandra Schlichting
9,0652677125
asked Nov 12 at 10:43
Sandra Schlichting
9,0652677125
9,0652677125
What is your input file?
– Inian
Nov 12 at 10:48
You should remove the{around thegsubcommand as this is not a one-liner anymore (and maybe remove the1entirely)
– Aserre
Nov 12 at 10:49
@Sandra Schlichting, you need NOT to usecatwithawk,awkcould read files by itself too.
– RavinderSingh13
Nov 12 at 11:00
Show us the input file you are working with? What is the value that you want togsub()on? What is the expected output
– Inian
Nov 12 at 11:11
add a comment |
What is your input file?
– Inian
Nov 12 at 10:48
You should remove the{around thegsubcommand as this is not a one-liner anymore (and maybe remove the1entirely)
– Aserre
Nov 12 at 10:49
@Sandra Schlichting, you need NOT to usecatwithawk,awkcould read files by itself too.
– RavinderSingh13
Nov 12 at 11:00
Show us the input file you are working with? What is the value that you want togsub()on? What is the expected output
– Inian
Nov 12 at 11:11
What is your input file?
– Inian
Nov 12 at 10:48
What is your input file?
– Inian
Nov 12 at 10:48
You should remove the
{ around the gsub command as this is not a one-liner anymore (and maybe remove the 1 entirely)– Aserre
Nov 12 at 10:49
You should remove the
{ around the gsub command as this is not a one-liner anymore (and maybe remove the 1 entirely)– Aserre
Nov 12 at 10:49
@Sandra Schlichting, you need NOT to use
cat with awk, awk could read files by itself too.– RavinderSingh13
Nov 12 at 11:00
@Sandra Schlichting, you need NOT to use
cat with awk, awk could read files by itself too.– RavinderSingh13
Nov 12 at 11:00
Show us the input file you are working with? What is the value that you want to
gsub() on? What is the expected output– Inian
Nov 12 at 11:11
Show us the input file you are working with? What is the value that you want to
gsub() on? What is the expected output– Inian
Nov 12 at 11:11
add a comment |
1 Answer
1
active
oldest
votes
up vote
1
down vote
accepted
You can't save { in to a variable since it denotes some action. Moreover in case you save output of sub or gsub it always gives you the count of substitutes it made to line/variable. so better try to change that code line to following.
Change your 2 lines:
x = {gsub(/..B/,"&:")}1
print " fixed-address "print x";"
To:
new_line=$0
gsub(/..B/,"&:",new_line)
print " fixed-address "new_line";"
By doing above your actual line's value will NEVER change and you could use it doing other stuff later point of time in your code too. I haven't tested above since samples were not given but it should work.
answered Nov 12 at 10:48
RavinderSingh13
25.4k41438
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
1
down vote
accepted
You can't save { in to a variable since it denotes some action. Moreover in case you save output of sub or gsub it always gives you the count of substitutes it made to line/variable. so better try to change that code line to following.
Change your 2 lines:
x = {gsub(/..B/,"&:")}1
print " fixed-address "print x";"
To:
new_line=$0
gsub(/..B/,"&:",new_line)
print " fixed-address "new_line";"
By doing above your actual line's value will NEVER change and you could use it doing other stuff later point of time in your code too. I haven't tested above since samples were not given but it should work.
answered Nov 12 at 10:48
RavinderSingh13
25.4k41438
add a comment |
up vote
1
down vote
accepted
You can't save { in to a variable since it denotes some action. Moreover in case you save output of sub or gsub it always gives you the count of substitutes it made to line/variable. so better try to change that code line to following.
Change your 2 lines:
x = {gsub(/..B/,"&:")}1
print " fixed-address "print x";"
To:
new_line=$0
gsub(/..B/,"&:",new_line)
print " fixed-address "new_line";"
By doing above your actual line's value will NEVER change and you could use it doing other stuff later point of time in your code too. I haven't tested above since samples were not given but it should work.
answered Nov 12 at 10:48
RavinderSingh13
25.4k41438
add a comment |
up vote
1
down vote
accepted
up vote
1
down vote
accepted
You can't save { in to a variable since it denotes some action. Moreover in case you save output of sub or gsub it always gives you the count of substitutes it made to line/variable. so better try to change that code line to following.
Change your 2 lines:
x = {gsub(/..B/,"&:")}1
print " fixed-address "print x";"
To:
new_line=$0
gsub(/..B/,"&:",new_line)
print " fixed-address "new_line";"
By doing above your actual line's value will NEVER change and you could use it doing other stuff later point of time in your code too. I haven't tested above since samples were not given but it should work.
answered Nov 12 at 10:48
RavinderSingh13
25.4k41438
You can't save { in to a variable since it denotes some action. Moreover in case you save output of sub or gsub it always gives you the count of substitutes it made to line/variable. so better try to change that code line to following.
Change your 2 lines:
x = {gsub(/..B/,"&:")}1
print " fixed-address "print x";"
To:
new_line=$0
gsub(/..B/,"&:",new_line)
print " fixed-address "new_line";"
By doing above your actual line's value will NEVER change and you could use it doing other stuff later point of time in your code too. I haven't tested above since samples were not given but it should work.
answered Nov 12 at 10:48
RavinderSingh13
25.4k41438
edited Nov 12 at 10:56
answered Nov 12 at 10:48
RavinderSingh13
25.4k41438
answered Nov 12 at 10:48
RavinderSingh13
25.4k41438
answered Nov 12 at 10:48
RavinderSingh13
25.4k41438
25.4k41438
add a comment |
add a comment |
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What is your input file?
– Inian
Nov 12 at 10:48
You should remove the
{around thegsubcommand as this is not a one-liner anymore (and maybe remove the1entirely)– Aserre
Nov 12 at 10:49
@Sandra Schlichting, you need NOT to use
catwithawk,awkcould read files by itself too.– RavinderSingh13
Nov 12 at 11:00
Show us the input file you are working with? What is the value that you want to
gsub()on? What is the expected output– Inian
Nov 12 at 11:11