http://d.puremagic.com/issues/show_bug.cgi?id=10174
Summary: std.file claims files which are symlinks to
non-existant files don't exist
Product: D
Version: D2
Platform: All
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Phobos
AssignedTo: [email protected]
ReportedBy: [email protected]
--- Comment #0 from [email protected] 2013-05-26 05:21:42 PDT ---
The functions exists() and isSymlink() of std.file interact with symlinks in a
way that does not make sense to me. It seems the exists() function checks
whether the file pointed to by the symlink exists instead of the symlink
itself. I however think this is quite counter-intuitive as it leads to
situations where exists() returns false while isSymlink() returns true on the
same file if the symlink is broken. This behaviour is also not documented.
Here is a simple test case:
import std.file, std.stdio;
void main()
{
auto file = "testfile";
symlink("DOES-NOT-EXIST", file);
writefln("exists: %b, isSymlink: %b", exists(file), isSymlink(file));
}
Which outputs:
exists: 0, isSymlink: 1
But should output:
exists: 1, isSymlink: 1
Maybe I am overlooking something here, but if not, I suggest the behaviour of
exists() to be changed to check the file itself and not the symlink target
(i.e. use lstat instead of stat) and maybe offer a function that explicitly
checks the referenced file in case of a symbolic link. Or, preserving
backwards-compatibility, introduce a new function that explicitly checks only
the file itself and properly document exists' behaviour.
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