rustc on Windows 7 32 bit:
C:\Users\andrew\walkdir\symlinks>rustc --version
rustc 1.5.0-nightly (6e5a32547 2015-09-19)
Test program:
use std::fs;
fn main() {
let md = fs::symlink_metadata("is_a_symlink").unwrap();
println!("is symlink? {}", md.file_type().is_symlink());
match fs::read_link("is_a_symlink") {
Ok(p) => println!("{}", p.display()),
Err(err) => println!("{:?}", err),
}
}Create a symlink on Windows at is_a_symlink pointing to not_a_symlink and
run above program (working as intended):
C:\Users\andrew\walkdir\symlinks>mklink is_a_symlink C:\Users\andrew\walkdir\symlinks\not_a_symlink
symbolic link created for is_a_symlink <<===>> C:\Users\andrew\walkdir\symlinks\not_a_symlink
C:\Users\andrew\walkdir\symlinks>dir
09/19/2015 11:40 PM <DIR> .
09/19/2015 11:40 PM <DIR> ..
09/19/2015 11:40 PM <SYMLINK> is_a_symlink [C:\Users\andrew\walkdir\symlinks\not_a_symlink]
09/19/2015 11:32 PM 0 not_a_symlink
09/19/2015 11:36 PM 2,118,989 win_symlink_test.exe
09/19/2015 11:36 PM 261 win_symlink_test.rs
C:\Users\andrew\walkdir\symlinks>win_symlink_test.exe
is symlink? true
\??\C:\Users\andrew\walkdir\symlinks\not_a_symlink
This correctly identifies the file as a symlink and resolves it correctly.
If we instead creation a junction and follow the same steps, we can observe an
inconsistency between file_type().is_symlink() and the behavior of
fs::read_link:
C:\Users\andrew\walkdir\symlinks>mklink /J is_a_symlink C:\Users\andrew\walkdir\symlinks\not_a_symlink
Junction created for is_a_symlink <<===>> C:\Users\andrew\walkdir\symlinks\not_a_symlink
C:\Users\andrew\walkdir\symlinks>dir
09/19/2015 11:46 PM <DIR> .
09/19/2015 11:46 PM <DIR> ..
09/19/2015 11:46 PM <JUNCTION> is_a_symlink [C:\Users\andrew\walkdir\symlinks\not_a_symlink]
09/19/2015 11:32 PM 0 not_a_symlink
09/19/2015 11:44 PM 2,118,946 win_symlink_test.exe
09/19/2015 11:44 PM 286 win_symlink_test.rs
C:\Users\andrew\walkdir\symlinks>win_symlink_test.exe
is symlink? true
Error { repr: Custom(Custom { kind: Other, error: StringError("not a symlink") }) }
(The key difference is the use of mklink /J to create a junction.)
The output here shows that it is correctly detected as a symlink, but
read_link chokes on it.
I looked briefly at the implementation and I haven't the slightest clue what's
wrong (I'm not familiar with Windows).
rustc on Windows 7 32 bit:
Test program:
Create a symlink on Windows at
is_a_symlinkpointing tonot_a_symlinkandrun above program (working as intended):
This correctly identifies the file as a symlink and resolves it correctly.
If we instead creation a junction and follow the same steps, we can observe an
inconsistency between
file_type().is_symlink()and the behavior offs::read_link:(The key difference is the use of
mklink /Jto create a junction.)The output here shows that it is correctly detected as a symlink, but
read_linkchokes on it.I looked briefly at the implementation and I haven't the slightest clue what's
wrong (I'm not familiar with Windows).