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Diffstat (limited to 'doc/cpio.texi')
| -rw-r--r-- | doc/cpio.texi | 38 |
1 files changed, 23 insertions, 15 deletions
diff --git a/doc/cpio.texi b/doc/cpio.texi index e631934..9e7f497 100644 --- a/doc/cpio.texi +++ b/doc/cpio.texi @@ -150,13 +150,19 @@ entries in a directory before printing the directory itself. This limits the effects of restrictive directory permissions by printing the directory entries in a directory before the directory name itself. - - - -Extracting an archive requires a bit more thought because cpio will not -create directories by default. Another characteristic, is it will not -overwrite existing files unless you tell it to. - +Extracting an archive requires a bit more thought. First of all, by +default cpio extracts the files with exactly the same name as stored +in the archive. That means that if the archive contains absolute +paths, you will extract files to their absolute locations no matter +what directory you're in when running the command. You can instruct +cpio to remove leading slashes using the +@option{--no-absolute-filenames} option. Nevertheless, the good +practice is to always test the archive using @command{cpio -t} prior +to extracting it. + +Furthermore, cpio will not create directories by default. +Another characteristic, is it will not overwrite existing files unless +you tell it to. @example @cartouche @@ -165,7 +171,7 @@ overwrite existing files unless you tell it to. @end example This will retrieve the files archived in the file directory.cpio and -place them in the present directory. The @option{-i} option extracts the +restore them to their locations. The @option{-i} option extracts the archive and the @option{-v} shows the file names as they are extracted. If you are dealing with an archived directory tree, you need to use the @option{-d} option to create directories as necessary, something like: @@ -176,11 +182,11 @@ If you are dealing with an archived directory tree, you need to use the @end cartouche @end example -This will take the contents of the archive tree.cpio and extract it to -the current directory. If you try to extract the files on top of files -of the same name that already exist (and have the same or later -modification time) cpio will not extract the file unless told to do so -by the -u option. @xref{Copy-in mode}. +This will take the contents of the archive tree.cpio and extract it. +If you try to extract the files on top of files of the same name that +already exist (and have the same or later modification time) cpio will +not extract the file unless told to do so by the -u option. +@xref{Copy-in mode}. In copy-pass mode, cpio copies files from one directory tree to another, @@ -252,7 +258,8 @@ Append to an existing archive. @itemx --reset-access-time Reset the access times of files after reading them. @item --absolute-filenames -Do not strip file system prefix components from the file names. +Do not strip file system prefix components from the file names. This +is the default. @item --no-absolute-filenames Strip file system prefix components from the file names before storing them to the archive. @@ -331,7 +338,8 @@ The following options can be used in copy-in mode: @table @option @item --absolute-filenames -Do not strip file system prefix components from the file names. +Do not strip file system prefix components from the file names. This +is the default. @item --no-absolute-filenames Create all files relative to the current directory. @item --block-size=@var{block-size} |