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Jan Danielsson
Guest
|  Posted: Fri Nov 17, 2006 6:03 pm Post subject: Retrieve string between parentheses? |
| Hello all,
(Is the group alt.comp.lang.sed dead?)
I need to parse the file name from an "md5" output (the file name is
enclosed in parenthesis). With my very limited shell fu, I managed to
tell sed the following:
$ md5 * | sed 's/.*(//; s/).*=\ /:/'
However, this will - obviously - fail if the file name contains
parenthesis. I need to scan for a ")" backwards from the end of the line.
Can sed do it, or do I need awk?
--
Kind regards,
Jan Danielsson |
| | Back to top | |  | Paddy
Guest
| | Posted: Fri Nov 17, 2006 6:08 pm Post subject: Re: Retrieve string between parentheses? |
| Jan Danielsson wrote:
| Quote: | Hello all,
(Is the group alt.comp.lang.sed dead?)
I need to parse the file name from an "md5" output (the file name is
enclosed in parenthesis). With my very limited shell fu, I managed to
tell sed the following:
$ md5 * | sed 's/.*(//; s/).*=\ /:/'
However, this will - obviously - fail if the file name contains
parenthesis. I need to scan for a ")" backwards from the end of the line.
Can sed do it, or do I need awk?
--
Kind regards,
Jan Danielsson
|
I don't know md5 format.
Could you give a few lines of input and expected output that covers the
range of input edge cases?
- Paddy. |
| | Back to top | | | Janis Papanagnou
Guest
| | Posted: Fri Nov 17, 2006 6:23 pm Post subject: Re: Retrieve string between parentheses? |
| Jan Danielsson wrote:
| Quote: | Hello all,
(Is the group alt.comp.lang.sed dead?)
I need to parse the file name from an "md5" output (the file name is
enclosed in parenthesis).
|
(My md5sum does not output parenthesis.)
| Quote: | With my very limited shell fu, I managed to
tell sed the following:
$ md5 * | sed 's/.*(//; s/).*=\ /:/'
However, this will - obviously - fail if the file name contains
parenthesis. I need to scan for a ")" backwards from the end of the line.
Can sed do it, or do I need awk?
|
If there's only one parenthesis on the line...
awk -F[()] '{print $2}'
....otherwise adjust the field number.
Janis |
| | Back to top | | | Jan Danielsson
Guest
| | Posted: Fri Nov 17, 2006 6:24 pm Post subject: Re: Retrieve string between parentheses? |
| Paddy wrote:
| Quote: | I need to parse the file name from an "md5" output (the file name is
enclosed in parenthesis). With my very limited shell fu, I managed to
tell sed the following:
$ md5 * | sed 's/.*(//; s/).*=\ /:/'
However, this will - obviously - fail if the file name contains
parenthesis. I need to scan for a ")" backwards from the end of the line.
Can sed do it, or do I need awk?
I don't know md5 format.
Could you give a few lines of input and expected output that covers the
range of input edge cases?
|
Sure,
$ md5 test.sh
MD5 (test.sh) = 5387c69d47140869a1707f343f11019a
The problem is, like I mentioned above, that a file name can contain
'(' and ')', and they - obviously - need not be nested.
So this is a (theoretical) possibility:
MD5 (foo(bar)))))())(()(()(.txt) = 5387c69d47140869a1707f343f11019a
--
Kind regards,
Jan Danielsson |
| | Back to top | | | Janis Papanagnou
Guest
| | Posted: Fri Nov 17, 2006 6:38 pm Post subject: Re: Retrieve string between parentheses? |
| Jan Danielsson wrote:
| Quote: | Paddy wrote:
I need to parse the file name from an "md5" output (the file name is
enclosed in parenthesis). With my very limited shell fu, I managed to
tell sed the following:
$ md5 * | sed 's/.*(//; s/).*=\ /:/'
However, this will - obviously - fail if the file name contains
parenthesis. I need to scan for a ")" backwards from the end of the line.
Can sed do it, or do I need awk?
I don't know md5 format.
Could you give a few lines of input and expected output that covers the
range of input edge cases?
Sure,
$ md5 test.sh
MD5 (test.sh) = 5387c69d47140869a1707f343f11019a
The problem is, like I mentioned above, that a file name can contain
'(' and ')', and they - obviously - need not be nested.
So this is a (theoretical) possibility:
MD5 (foo(bar)))))())(()(()(.txt) = 5387c69d47140869a1707f343f11019a
|
$ awk '{print substr($0,6,length($0)-41)}'
MD5 (test.sh) = 5387c69d47140869a1707f343f11019a
test.sh
MD5 (foo(bar)))))())(()(()(.txt) = 5387c69d47140869a1707f343f11019a
foo(bar)))))())(()(()(.txt
Janis |
| | Back to top | | | Jan Danielsson
Guest
| | Posted: Fri Nov 17, 2006 6:38 pm Post subject: Re: Retrieve string between parentheses? |
| Janis Papanagnou wrote:
[---]
| Quote: | MD5 (foo(bar)))))())(()(()(.txt) = 5387c69d47140869a1707f343f11019a
$ awk '{print substr($0,6,length($0)-41)}'
[---] |
Hmm... I think I'd better stop staring at sed, and start learning
awk. It seems much better suited for these kind of things.
Thanks!
--
Kind regards,
Jan Danielsson |
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