I was trying to use a library (fswatch) for watching the file system but I immediately ran into an error using it so I decided to write my own.
Funny thing: I ran into the same error.
It seems that there's some problem with files with a name like #tests.txt#
(which emacs likes to create).
My code is really basic, when the directory modified timestamp changes, I list the directory entries with dirEntries
and then call dirEntry.getTimes()
on it.
import std.file;
import std.stdio;
import std.datetime.systime;
import std.stdio: writefln;
void main(string[] args) {
assert(args.length == 2);
foreach (DirEntry entry; args[1].dirEntries(SpanMode.shallow)) {
SysTime st, ac;
entry.getTimes(ac, st);
writefln("entry %s changed at %s", entry.name, st);
}
}
Create a directory like this:
hello
├── #hi.txt#
└── hi.txt
Running this, I get:
▶ ldc2 -L-ld_classic -run main.d hello
entry hello/hi.txt changed at 2023-Dec-24 14:36:01.1020473
entry hello/#hi.txt# changed at 2023-Dec-24 14:40:26.7945088
std.file.FileException@/Users/renato/dlang/ldc-1.35.0/bin/../import/std/file.d(1282): hello/.#hi.txt: No such file or directory
----------------
??:? object.Throwable.TraceInfo core.runtime.defaultTraceHandler(void*) [0x107210e52]
Error: /var/folders/m_/mxbg6vcj25qdx5nkbsllb4kw0000gn/T/main-7fe78b failed with status: 1
(ldc-1.35.0)
As you can see, the name of the file in the exception seems wrong. It should be #hi.txt#
, but it tries to access .#hi.txt
.
I actually reproduced this in both Mac and Linux... on Linux, though, it shows a "funny" directory listing which perhaps explains something:
l
rwxrwxrwx 1 renato renato 31 Dec 24 15:13 .#hi.txt -> renato@renato.902129:1701726658
The .#hi.txt ->
(seems like a link?) is shown in red on the terminal... I don't understand what exactly this is (links are not shown red).
Can anyone help me understand this? Should I ignore file names starting with .#
perhas?