Show only the really extracted (non-skipped) files using tar
I'm extracting daily backup archives. I want to see only the new files since the last day. The archives contain lot of already existing files, which I don't want to overwrite, so I use the --skip-old-files option, which is fine.
But I'd like to list only those files that were actually extracted and omit those that were skipped because they already exist.
Example:
My current command is:
tar --verbose --skip-old-files --extract --file=2019-02-10.tar.gz
and the output is (where file1 and file2 were already exist and file3 was new):
file1.zip
tar: file1.zip: skipping existing file
file2.zip
tar: file2.zip: skipping existing file
file3.zip
I need only the file3.zip in the output. Is it possible?
tar output
edited Feb 26 at 16:42
Jeff Schaller
43.5k1161140
asked Feb 26 at 16:40
csadamcsadam
1184
add a comment |
I'm extracting daily backup archives. I want to see only the new files since the last day. The archives contain lot of already existing files, which I don't want to overwrite, so I use the --skip-old-files option, which is fine.
But I'd like to list only those files that were actually extracted and omit those that were skipped because they already exist.
Example:
My current command is:
tar --verbose --skip-old-files --extract --file=2019-02-10.tar.gz
and the output is (where file1 and file2 were already exist and file3 was new):
file1.zip
tar: file1.zip: skipping existing file
file2.zip
tar: file2.zip: skipping existing file
file3.zip
I need only the file3.zip in the output. Is it possible?
tar output
edited Feb 26 at 16:42
Jeff Schaller
43.5k1161140
asked Feb 26 at 16:40
csadamcsadam
1184
I'm realizing that you have to hope that there are no actual files named "tar: file1.zip: skipping existing file", unless you carefully manage the stdout and stderr streams...
– Jeff Schaller
Feb 26 at 18:11
Yeah, I also realized that the complexity goes too high to solve this problem with a pure output text mangling solution. The best option would be if the tar command itself could support this type of output.
– csadam
Feb 26 at 18:27
add a comment |
I'm extracting daily backup archives. I want to see only the new files since the last day. The archives contain lot of already existing files, which I don't want to overwrite, so I use the --skip-old-files option, which is fine.
But I'd like to list only those files that were actually extracted and omit those that were skipped because they already exist.
Example:
My current command is:
tar --verbose --skip-old-files --extract --file=2019-02-10.tar.gz
and the output is (where file1 and file2 were already exist and file3 was new):
file1.zip
tar: file1.zip: skipping existing file
file2.zip
tar: file2.zip: skipping existing file
file3.zip
I need only the file3.zip in the output. Is it possible?
tar output
edited Feb 26 at 16:42
Jeff Schaller
43.5k1161140
asked Feb 26 at 16:40
csadamcsadam
1184
I'm extracting daily backup archives. I want to see only the new files since the last day. The archives contain lot of already existing files, which I don't want to overwrite, so I use the --skip-old-files option, which is fine.
But I'd like to list only those files that were actually extracted and omit those that were skipped because they already exist.
Example:
My current command is:
tar --verbose --skip-old-files --extract --file=2019-02-10.tar.gz
and the output is (where file1 and file2 were already exist and file3 was new):
file1.zip
tar: file1.zip: skipping existing file
file2.zip
tar: file2.zip: skipping existing file
file3.zip
I need only the file3.zip in the output. Is it possible?
tar output
tar output
edited Feb 26 at 16:42
Jeff Schaller
43.5k1161140
asked Feb 26 at 16:40
csadamcsadam
1184
edited Feb 26 at 16:42
Jeff Schaller
43.5k1161140
asked Feb 26 at 16:40
csadamcsadam
1184
edited Feb 26 at 16:42
Jeff Schaller
43.5k1161140
edited Feb 26 at 16:42
Jeff Schaller
43.5k1161140
edited Feb 26 at 16:42
Jeff Schaller
43.5k1161140
43.5k1161140
asked Feb 26 at 16:40
csadamcsadam
1184
asked Feb 26 at 16:40
csadamcsadam
1184
asked Feb 26 at 16:40
csadamcsadam
1184
1184
I'm realizing that you have to hope that there are no actual files named "tar: file1.zip: skipping existing file", unless you carefully manage the stdout and stderr streams...
– Jeff Schaller
Feb 26 at 18:11
Yeah, I also realized that the complexity goes too high to solve this problem with a pure output text mangling solution. The best option would be if the tar command itself could support this type of output.
– csadam
Feb 26 at 18:27
add a comment |
I'm realizing that you have to hope that there are no actual files named "tar: file1.zip: skipping existing file", unless you carefully manage the stdout and stderr streams...
– Jeff Schaller
Feb 26 at 18:11
Yeah, I also realized that the complexity goes too high to solve this problem with a pure output text mangling solution. The best option would be if the tar command itself could support this type of output.
– csadam
Feb 26 at 18:27
I'm realizing that you have to hope that there are no actual files named "tar: file1.zip: skipping existing file", unless you carefully manage the stdout and stderr streams...
– Jeff Schaller
Feb 26 at 18:11
I'm realizing that you have to hope that there are no actual files named "tar: file1.zip: skipping existing file", unless you carefully manage the stdout and stderr streams...
– Jeff Schaller
Feb 26 at 18:11
Yeah, I also realized that the complexity goes too high to solve this problem with a pure output text mangling solution. The best option would be if the tar command itself could support this type of output.
– csadam
Feb 26 at 18:27
Yeah, I also realized that the complexity goes too high to solve this problem with a pure output text mangling solution. The best option would be if the tar command itself could support this type of output.
– csadam
Feb 26 at 18:27
add a comment |
1 Answer
1
active
oldest
votes
If this is the only process writing to the directory then you could create a temporary file, extract the files not in verbose mode, then look at those with a change time newer than the temp file
e.g.
MYTMP=$(mktemp)
tar --skip-old-files --extract --file=2019-02-10.tar.gz
find . -cnewer $MYTMP
rm $MYTMP
answered Feb 26 at 17:53
Stephen HarrisStephen Harris
26.5k34980
I will use the MYTMP to create a fixed name file (instead of temporary file) as a flag to avoid starting more than one instance. If the file exists then my script will do nothing.
– csadam
Feb 26 at 18:22
I secretly hoped there is an solution for this in the tar command itself, but it's good workaround for me.
– csadam
Feb 26 at 18:24
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
If this is the only process writing to the directory then you could create a temporary file, extract the files not in verbose mode, then look at those with a change time newer than the temp file
e.g.
MYTMP=$(mktemp)
tar --skip-old-files --extract --file=2019-02-10.tar.gz
find . -cnewer $MYTMP
rm $MYTMP
answered Feb 26 at 17:53
Stephen HarrisStephen Harris
26.5k34980
I will use the MYTMP to create a fixed name file (instead of temporary file) as a flag to avoid starting more than one instance. If the file exists then my script will do nothing.
– csadam
Feb 26 at 18:22
I secretly hoped there is an solution for this in the tar command itself, but it's good workaround for me.
– csadam
Feb 26 at 18:24
add a comment |
If this is the only process writing to the directory then you could create a temporary file, extract the files not in verbose mode, then look at those with a change time newer than the temp file
e.g.
MYTMP=$(mktemp)
tar --skip-old-files --extract --file=2019-02-10.tar.gz
find . -cnewer $MYTMP
rm $MYTMP
answered Feb 26 at 17:53
Stephen HarrisStephen Harris
26.5k34980
I will use the MYTMP to create a fixed name file (instead of temporary file) as a flag to avoid starting more than one instance. If the file exists then my script will do nothing.
– csadam
Feb 26 at 18:22
I secretly hoped there is an solution for this in the tar command itself, but it's good workaround for me.
– csadam
Feb 26 at 18:24
add a comment |
If this is the only process writing to the directory then you could create a temporary file, extract the files not in verbose mode, then look at those with a change time newer than the temp file
e.g.
MYTMP=$(mktemp)
tar --skip-old-files --extract --file=2019-02-10.tar.gz
find . -cnewer $MYTMP
rm $MYTMP
answered Feb 26 at 17:53
Stephen HarrisStephen Harris
26.5k34980
If this is the only process writing to the directory then you could create a temporary file, extract the files not in verbose mode, then look at those with a change time newer than the temp file
e.g.
MYTMP=$(mktemp)
tar --skip-old-files --extract --file=2019-02-10.tar.gz
find . -cnewer $MYTMP
rm $MYTMP
answered Feb 26 at 17:53
Stephen HarrisStephen Harris
26.5k34980
answered Feb 26 at 17:53
Stephen HarrisStephen Harris
26.5k34980
answered Feb 26 at 17:53
Stephen HarrisStephen Harris
26.5k34980
answered Feb 26 at 17:53
Stephen HarrisStephen Harris
26.5k34980
26.5k34980
I will use the MYTMP to create a fixed name file (instead of temporary file) as a flag to avoid starting more than one instance. If the file exists then my script will do nothing.
– csadam
Feb 26 at 18:22
I secretly hoped there is an solution for this in the tar command itself, but it's good workaround for me.
– csadam
Feb 26 at 18:24
add a comment |
I will use the MYTMP to create a fixed name file (instead of temporary file) as a flag to avoid starting more than one instance. If the file exists then my script will do nothing.
– csadam
Feb 26 at 18:22
I secretly hoped there is an solution for this in the tar command itself, but it's good workaround for me.
– csadam
Feb 26 at 18:24
I will use the MYTMP to create a fixed name file (instead of temporary file) as a flag to avoid starting more than one instance. If the file exists then my script will do nothing.
– csadam
Feb 26 at 18:22
I will use the MYTMP to create a fixed name file (instead of temporary file) as a flag to avoid starting more than one instance. If the file exists then my script will do nothing.
– csadam
Feb 26 at 18:22
I secretly hoped there is an solution for this in the tar command itself, but it's good workaround for me.
– csadam
Feb 26 at 18:24
I secretly hoped there is an solution for this in the tar command itself, but it's good workaround for me.
– csadam
Feb 26 at 18:24
add a comment |
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I'm realizing that you have to hope that there are no actual files named "tar: file1.zip: skipping existing file", unless you carefully manage the stdout and stderr streams...
– Jeff Schaller
Feb 26 at 18:11
Yeah, I also realized that the complexity goes too high to solve this problem with a pure output text mangling solution. The best option would be if the tar command itself could support this type of output.
– csadam
Feb 26 at 18:27