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libc, vfs: rename improvements

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Perform POSIX rename checks at the libc VFS plugin.
Clarify rename at VFS fs, ram, single, and tar file systems.

Issue #1900
Fixes #1782
This commit is contained in:
Emery Hemingway
2016-03-02 14:32:43 +01:00
committed by Christian Helmuth
parent d0735b1734
commit 23c1d4c66d
6 changed files with 61 additions and 24 deletions
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6
repos/os/include/vfs/tar_file_system.h
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@ -528,9 +528,11 @@ class Vfs::Tar_file_system : public File_system
return READLINK_OK;
}
Rename_result rename(char const *, char const *) override
Rename_result rename(char const *from, char const *to) override
{
return RENAME_ERR_NO_PERM;
if (_root_node.lookup(from) || _root_node.lookup(to))
return RENAME_ERR_NO_PERM;
return RENAME_ERR_NO_ENTRY;
}
Mkdir_result mkdir(char const *, unsigned) override