On Lu, 28 iul 14, 11:24:31, berenger.mo...@neutralite.org wrote: > Le 27.07.2014 01:42, PaulNM a écrit : > > >Inodes are files/folders, files/folders are inodes. (1-to-1) Anything > >that has a bunch of files/folders will use a bunch of inodes. Same > >number in fact. > > Hum... is it accurate? > Files can use more than one inode, with ln
Are you talking about hard links? As far as I understand (but I'm sure someone will correct me if I'm wrong) the file itself is always just one inode, but there are one or more directory entries (links) pointing to it. If you remove all of them the file is deleted. > Folders can not, AFAIK, since > symlinks are simply pointers to inodes (which are themselves pointers --with > reference counter I guess, std::shared_ptr in c++11?-- to data). > I'm simply asking, I might be completely wrong or inaccurate... Symbolic links, a.k.a. soft links, a.k.a. "symlinks" are files themselves (i.e. each using one inode) that contain a pointer to one of the directory entries of another file or directory. To ilustrate the two explanation see this series of commands: $ echo 'some text' > testfile $ ln testfile testhl $ file testfile testfile: ASCII text $ file testhl testhl: ASCII text $ rm testfile $ file testhl testhl: ASCII text $ mv testhl testfile $ ln --symbolic testfile testsl $ file testfile testfile: ASCII text $ file testsl testsl: symbolic link to `testfile' $ cat testsl some text (this is expected, since 'cat' will follow symbolic links) $ rm testfile $ cat testsl cat: testsl: No such file or directory (the error message is a bit misleading) $ file testsl testsl: broken symbolic link to `testfile' This should also explain why hard links only work on the same filesystem while symbolic links also work across file systems and why you can delete a file if and only if you have write permissions for the *directory* containing it :) Kind regards, Andrei -- http://wiki.debian.org/FAQsFromDebianUser Offtopic discussions among Debian users and developers: http://lists.alioth.debian.org/mailman/listinfo/d-community-offtopic http://nuvreauspam.ro/gpg-transition.txt
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