10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I'm trying to write a Unix script that will go to a specific directory (/tmp/Sanbox/logs) and tar.gz all the log files in that directory and delete the original files that are older than 2 days. So far I have this but it doesn't work. Any help would be appreciated.
#!/bin/bash
... (7 Replies)
Discussion started by: Loc
7 Replies
2. UNIX for Dummies Questions & Answers
HI All
Please suggest how to untar archive on remote sever. When im trying use regular command without any flags everything is working fine:
$( ssh <user>@<server> -n '. ~/.profile >/dev/null 2>&1 ; cd /path_1 ; copiedIVR_name=`ls -tr | tail -1` ; tar xvf $copiedIVR_name ' )
but when im... (9 Replies)
Discussion started by: BACya
9 Replies
3. Shell Programming and Scripting
Hi,
I need to extract a single file from a tar file to another directory.
So far I have this:
This one extract a single file to same directory:
tar -xvf filename.tar ./file.txt
I tried this but its not working
tar -xvf filename.tar /home/dir ./file.txt
or this: (6 Replies)
Discussion started by: erin00
6 Replies
4. UNIX for Dummies Questions & Answers
I would like to confirm my file.tar is been tar-ed correctly before I remove them. But I have very limited disc space to untar it.
Can I just do the listing instead of actual extract it? Can I say confirm folder integrity if the listing is sucessful without problem?
tar tvf file1.tar
... (1 Reply)
Discussion started by: vivien_chu
1 Replies
5. Shell Programming and Scripting
Hi,
I have tar filw which has multiple directories which contain files.
When i extract using tar -xf the directory structure also get extracted.
I require only files and not directory structures as there will be overhead of moving the files again.
So i searched here and got a solution but... (4 Replies)
Discussion started by: chetan.c
4 Replies
6. Solaris
Hi,
How to extract a tar.gz file and put it under a designated folder that I specify in a one line command?
thank you in advance. (3 Replies)
Discussion started by: melanie_pfefer
3 Replies
7. UNIX for Advanced & Expert Users
Hi,
I created a tar file of a directory dir1 from /tmp in the following way
$pwd
/tmp
$tar -cvf dir1.tar dir1 (dir1 will have say file1)
Now i want to extract it in the directory /tmp/dir2 so that the directory dir1 is also created and extracted... (1 Reply)
Discussion started by: ammu
1 Replies
8. UNIX for Dummies Questions & Answers
I received a tar file of a directory with 50,000 files in it. Is it possible to extract the files in the tar file without first creating the directory?
ie. Doing tar -xvf filename.tar extracts as follows:
x directory/file1.txt
x directory/file2.txt
.
.
.
I would like to avoid... (4 Replies)
Discussion started by: here2learn
4 Replies
9. UNIX for Advanced & Expert Users
anyone know if it is possable to extract a subdirectory in a tar file.
IE
tarfile contains
parent dir
-sub dir A
-sub dir B
I want to extract sub dir B. (2 Replies)
Discussion started by: Optimus_P
2 Replies
10. UNIX for Dummies Questions & Answers
Is it possible to redirect the output from 'tar xvf' to another directory?
The taped tar image is extracting to my / dircetory - even though i'm running the command from /backups.
The contents list of the tape shows files created from /livebackups/...
Thanks
Richard (7 Replies)
Discussion started by: colesy
7 Replies
erl_tar(3erl) Erlang Module Definition erl_tar(3erl)
NAME
erl_tar - Unix 'tar' utility for reading and writing tar archives
DESCRIPTION
The erl_tar module archives and extract files to and from a tar file. The tar file format is the POSIX extended tar file format specified
in IEEE Std 1003.1 and ISO/IEC 9945-1. That is the same format as used by tar program on Solaris, but is not the same as used by the GNU
tar program.
By convention, the name of a tar file should end in " .tar ". To abide to the convention, you'll need to add " .tar " yourself to the name.
Tar files can be created in one operation using the create/2 or create/3 function.
Alternatively, for more control, the open , add/3,4 , and close/1 functions can be used.
To extract all files from a tar file, use the extract/1 function. To extract only some files or to be able to specify some more options,
use the extract/2 function.
To return a list of the files in a tar file, use either the table/1 or table/2 function. To print a list of files to the Erlang shell, use
either the t/1 or tt/1 function.
To convert an error term returned from one of the functions above to a readable message, use the format_error/1 function.
LIMITATIONS
For maximum compatibility, it is safe to archive files with names up to 100 characters in length. Such tar files can generally be extracted
by any tar program.
If filenames exceed 100 characters in length, the resulting tar file can only be correctly extracted by a POSIX-compatible tar program
(such as Solaris tar ), not by GNU tar.
File have longer names than 256 bytes cannot be stored at all.
The filename of the file a symbolic link points is always limited to 100 characters.
EXPORTS
add(TarDescriptor, Filename, Options) -> RetValue
Types TarDescriptor = term()
Filename = filename()
Options = [Option]
Option = dereference|verbose
RetValue = ok|{error,{Filename,Reason}}
Reason = term()
The add/3 function adds a file to a tar file that has been opened for writing by open/1 .
dereference :
By default, symbolic links will be stored as symbolic links in the tar file. Use the dereference option to override the default
and store the file that the symbolic link points to into the tar file.
verbose :
Print an informational message about the file being added.
add(TarDescriptor, FilenameOrBin, NameInArchive, Options) -> RetValue
Types TarDescriptor = term()
FilenameOrBin = Filename()|binary()
Filename = filename()()
NameInArchive = filename()
Options = [Option]
Option = dereference|verbose
RetValue = ok|{error,{Filename,Reason}}
Reason = term()
The add/4 function adds a file to a tar file that has been opened for writing by open/1 . It accepts the same options as add/3 .
NameInArchive is the name under which the file will be stored in the tar file. That is the name that the file will get when it will
be extracted from the tar file.
close(TarDescriptor)
Types TarDescriptor = term()
The close/1 function closes a tar file opened by open/1 .
create(Name, FileList) ->RetValue
Types Name = filename()
FileList = [Filename|{NameInArchive, binary()},{NameInArchive, Filename}]
Filename = filename()
NameInArchive = filename()
RetValue = ok|{error,{Name,Reason}} <V>Reason = term()
The create/2 function creates a tar file and archives the files whose names are given in FileList into it. The files may either be
read from disk or given as binaries.
create(Name, FileList, OptionList)
Types Name = filename()
FileList = [Filename|{NameInArchive, binary()},{NameInArchive, Filename}]
Filename = filename()
NameInArchive = filename()
OptionList = [Option]
Option = compressed|cooked|dereference|verbose
RetValue = ok|{error,{Name,Reason}} <V>Reason = term()
The create/3 function creates a tar file and archives the files whose names are given in FileList into it. The files may either be
read from disk or given as binaries.
The options in OptionList modify the defaults as follows.
compressed :
The entire tar file will be compressed, as if it has been run through the gzip program. To abide to the convention that a com-
pressed tar file should end in " .tar.gz " or " .tgz ", you'll need to add the appropriate extension yourself.
cooked :
By default, the open/2 function will open the tar file in raw mode, which is faster but does not allow a remote (erlang) file
server to be used. Adding cooked to the mode list will override the default and open the tar file without the raw option.
dereference :
By default, symbolic links will be stored as symbolic links in the tar file. Use the dereference option to override the default
and store the file that the symbolic link points to into the tar file.
verbose :
Print an informational message about each file being added.
extract(Name) -> RetValue
Types Name = filename()
RetValue = ok|{error,{Name,Reason}}
Reason = term()
The extract/1 function extracts all files from a tar archive.
If the Name argument is given as " {binary,Binary} ", the contents of the binary is assumed to be a tar archive.
If the Name argument is given as " {file,Fd} ", Fd is assumed to be a file descriptor returned from the file:open/2 function.
Otherwise, Name should be a filename.
extract(Name, OptionList)
Types Name = filename() | {binary,Binary} | {file,Fd}
Binary = binary()
Fd = file_descriptor()
OptionList = [Option]
Option = {cwd,Cwd}|{files,FileList}|keep_old_files|verbose|memory
Cwd = [dirname()]
FileList = [filename()]
RetValue = ok|MemoryRetValue|{error,{Name,Reason}}
MemoryRetValue = {ok, [{NameInArchive,binary()}]}
NameInArchive = filename()
Reason = term()
The extract/2 function extracts files from a tar archive.
If the Name argument is given as " {binary,Binary} ", the contents of the binary is assumed to be a tar archive.
If the Name argument is given as " {file,Fd} ", Fd is assumed to be a file descriptor returned from the file:open/2 function.
Otherwise, Name should be a filename.
The following options modify the defaults for the extraction as follows.
{cwd,Cwd} :
Files with relative filenames will by default be extracted to the current working directory. Given the {cwd,Cwd} option, the
extract/2 function will extract into the directory Cwd instead of to the current working directory.
{files,FileList} :
By default, all files will be extracted from the tar file. Given the {files,Files} option, the extract/2 function will only
extract the files whose names are included in FileList .
compressed :
Given the compressed option, the extract/2 function will uncompress the file while extracting If the tar file is not actually
compressed, the compressed will effectively be ignored.
cooked :
By default, the open/2 function will open the tar file in raw mode, which is faster but does not allow a remote (erlang) file
server to be used. Adding cooked to the mode list will override the default and open the tar file without the raw option.
memory :
Instead of extracting to a directory, the memory option will give the result as a list of tuples {Filename, Binary}, where
Binary is a binary containing the extracted data of the file named Filename in the tar file.
keep_old_files :
By default, all existing files with the same name as file in the tar file will be overwritten Given the keep_old_files option,
the extract/2 function will not overwrite any existing files.
verbose :
Print an informational message as each file is being extracted.
format_error(Reason) -> string()
Types Reason = term()
The format_error/1 converts an error reason term to a human-readable error message string.
open(Name, OpenModeList) -> RetValue
Types Name = filename()
OpenModeList = [OpenMode]
Mode = write|compressed|cooked
RetValue = {ok,TarDescriptor}|{error,{Name,Reason}}
TarDescriptor = term()
Reason = term()
The open/2 function creates a tar file for writing. (Any existing file with the same name will be truncated.)
By convention, the name of a tar file should end in " .tar ". To abide to the convention, you'll need to add " .tar " yourself to
the name.
Except for the write atom the following atoms may be added to OpenModeList :
compressed :
The entire tar file will be compressed, as if it has been run through the gzip program. To abide to the convention that a com-
pressed tar file should end in " .tar.gz " or " .tgz ", you'll need to add the appropriate extension yourself.
cooked :
By default, the open/2 function will open the tar file in raw mode, which is faster but does not allow a remote (erlang) file
server to be used. Adding cooked to the mode list will override the default and open the tar file without the raw option.
Use the add/3,4 functions to add one file at the time into an opened tar file. When you are finished adding files, use the close
function to close the tar file.
Warning:
The TarDescriptor term is not a file descriptor. You should not rely on the specific contents of the TarDescriptor term, as it may change
in future versions as more features are added to the erl_tar module.
table(Name) -> RetValue
Types Name = filename()
RetValue = {ok,[string()]}|{error,{Name,Reason}}
Reason = term()
The table/1 function retrieves the names of all files in the tar file Name .
table(Name, Options)
Types Name = filename()
The table/2 function retrieves the names of all files in the tar file Name .
t(Name)
Types Name = filename()
The t/1 function prints the names of all files in the tar file Name to the Erlang shell. (Similar to " tar t ".)
tt(Name)
Types Name = filename()
The tt/1 function prints names and information about all files in the tar file Name to the Erlang shell. (Similar to " tar tv ".)
Ericsson AB stdlib 1.17.3 erl_tar(3erl)