Fix Issue 16487 - Add function to obtain the available disk space #5776

jercaianu · 2017-10-10T15:44:44Z

removed redundant line

dlang-bot · 2017-10-10T15:44:47Z

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Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	16487	enhancement	Add function to obtain the available disk space

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std/file.d

jercaianu · 2017-10-10T18:08:02Z

Thanks for the comments, I'll shortly look into them as soon as I figure out what's going on with the FreeBSD failure.

Also, since we're here, do you think it would be a good idea to add functionality for getFreeDiskSpace or getDiskSpaceCapacity (similar to boost::filesystem) ?

Thanks,
Alex

ghost

looks good so far
just a little change related to version and it's okay.

jercaianu · 2017-10-10T19:44:17Z

I have figured out what's wrong with the FreeBSD test.
It seems that statvfs does not work on FreeBSD as expected, but statfs works.

The question is now, should I add statfs in the runtime, or just assume return 0 for FreeBSD?

Thanks,
Alex

wilzbach · 2017-10-10T23:24:17Z

The question is now, should I add statfs in the runtime, or just assume return 0 for FreeBSD?

Extending the bindings in druntime is almost always welcome as *BSD is vastly lacking behind in terms of maintenance manpower (iirc only one or two of the core people around here use it regularly).

n8sh · 2018-03-27T22:33:05Z

The question is now, should I add statfs in the runtime, or just assume return 0 for FreeBSD?

You throw an exception on failure, so isn't the correct behavior to throw an exception?

std/file.d

quickfur · 2018-03-27T22:43:44Z

Tagging @andralex since this adds a new public symbol.

quickfur · 2018-03-27T22:44:12Z

ping @jercaianu This has stalled for far too long. Any chance we can get things moving again?

jercaianu · 2018-03-28T18:11:31Z

@quickfur
Hi, the reason I can't move forward with this, is because I need to add statvfs on FreeBSD [1].
However, this in turn, is blocked by this one [2].

If statfs would be added, then I can easily finish this.

[1] - dlang/druntime#1937
[2] - https://issues.dlang.org/show_bug.cgi?id=17596#c8

std/file.d

wilzbach · 2018-03-30T22:21:57Z

std/file.d

+            return GetDiskFreeSpaceExW(path.tempCStringW(), &freeBytesAvailable, null, null);
+        } ();
+        enforce(err != 0,
+            new FileException(text("Cannot get available disk space: ", GetLastError())));


Have a look at the default constructor of FileException:

version(Windows) this(in char[] name, uint errno = .GetLastError(), string file = __FILE__, size_t line = __LINE__) @safe {

tl;dr: use cenforce

std/file.d

wilzbach · 2018-03-30T22:25:20Z

As this is a new function, it might be worthwhile to check this PR.
The idea is to mark it as unstable (in some way) for a few releases.

wilzbach · 2018-03-30T22:28:41Z

std/file.d

+    assert(space > 0);
+
+    assertThrown!FileException(getAvailableDiskSpace("ThisFileDoesNotExist123123"));
+}


I think we can do more tests here. Simple create a directory with deleteme and write files to it and check the resulting file size (if this varies on Windows, version(Posix) it).

Example:

https://dlang.org/phobos-prerelease/std_file.html#mkdir

That'd be a bit excessive - we'd be testing the OS primitives.

Based on what you have running on your system, the size could vary a lot.
This may cause such a test to fail at times, despite everything running correctly.

You should test that the function works for null and "" (empty strings) input. See e.g. https://issues.dlang.org/show_bug.cgi?id=14980

jercaianu · 2018-04-03T14:41:15Z

This should be alright now

I would still prefer that we either move this to std.experimental for one release or mark it as unstable in the docs somehow, s.t. we don't accidentally end up releasing something that we can't change anymore (as we used to do in the past), but I won't block this PR further.

andralex · 2018-04-18T12:16:46Z

@jercaianu what's with the linux32 failure?

andralex · 2018-04-18T12:17:01Z

@JackStouffer good to go?

n8sh · 2018-04-18T12:19:34Z

@andralex Appears unrelated.

posix.mak:381: recipe for target 'unittest/std/concurrency.run' failed
make[1]: *** [unittest/std/concurrency.run] Error 139

JackStouffer · 2018-04-18T14:15:05Z

I won’t be able to review this until late tonight. Please merge without my review if you think this is good to go.

tibi77 · 2019-03-08T13:57:00Z

Why is this stil open?

thewilsonator · 2019-03-08T14:02:31Z

Because it fails on FreeBSD.

thewilsonator · 2019-06-19T03:46:02Z

@n8sh this probably needs a rebase to pass on circle.

n8sh · 2019-06-23T11:31:27Z

std/file.d

+    }
+    else version (Posix)
+    {
+        import std.string : toStringz;


Since this function's argument type was changed from string to const char[] it should probably use tempCString instead of toStringz in the Posix path. toStringz always allocates if it is given a const char[].

Tests are no longer disabled on FreeBSD.

JohanEngelen · 2019-06-30T15:18:18Z

#5776 (comment) ?

jercaianu requested a review from CyberShadow as a code owner October 10, 2017 15:44

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jercaianu mentioned this pull request Oct 11, 2017

Added statfs for FreeBSD dlang/druntime#1937

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jercaianu force-pushed the disk branch from c350e8d to 8b0ee32 Compare March 30, 2018 22:23

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jercaianu force-pushed the disk branch from 8b0ee32 to f31a1b4 Compare March 30, 2018 22:25

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jercaianu force-pushed the disk branch from f31a1b4 to 0bffa0b Compare April 3, 2018 12:10

jercaianu force-pushed the disk branch from 9412f64 to df9fe8a Compare April 4, 2018 11:54

wilzbach force-pushed the disk branch from df9fe8a to 8f7371b Compare April 6, 2018 14:34

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n8sh force-pushed the disk branch from 7fbd999 to 78babae Compare June 18, 2019 23:40

jercaianu and others added 3 commits June 23, 2019 05:00

Fix Issue 16487 - Add function to obtain the available disk space

d38cbf9

Changed getAvailableDiskSpace signature

d0f1960

Fix FreeBSD deprecated import

8082e7d

n8sh force-pushed the disk branch from a10c9d7 to 8082e7d Compare June 23, 2019 09:01

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getAvailableDiskSpace: toStringz -> tempCString

425eeb3

thewilsonator added the Merge:auto-merge-squash label Jun 28, 2019

dlang-bot merged commit 6010a7c into dlang:master Jun 28, 2019

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Fix Issue 16487 - Add function to obtain the available disk space #5776

Fix Issue 16487 - Add function to obtain the available disk space #5776

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Fix Issue 16487 - Add function to obtain the available disk space #5776

Fix Issue 16487 - Add function to obtain the available disk space #5776

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