Hi,
"W. Wesley Groleau (伟思礼)" <[email protected]> writes:
> I would like to replace my macOS closed-source "df" with one that has
> one or two features I am not skilled enough to code in C.
Actually, the 'df' implementation used by MacOS is not closed source. It
can be found on GitHub [1]. Most of their programs are imported from
FreeBSD and modified to varying degrees.
They annoying ship old GPLv2+ programs because they are alergic to
GPLv3+. For example /usr/bin/bison on MacOS 15 isn't enough to build
Coreutils from git.
> 1) needs to have apfs as one of the filesystem types for -T (Apple's version
> does)
This is supported. See the following:
$ ./src/df -T
Filesystem Type 1K-blocks Used Available Use% Mounted on
/dev/disk3s1s1 apfs 239362496 205124268 34238228 86% /
/dev/disk3s6 apfs 239362496 205124268 34238228 86% /System/Volumes/VM
/dev/disk3s2 apfs 239362496 205124268 34238228 86%
/System/Volumes/Preboot
/dev/disk3s4 apfs 239362496 205124268 34238228 86%
/System/Volumes/Update
/dev/disk1s2 apfs 512000 18500 493500 4%
/System/Volumes/xarts
/dev/disk1s1 apfs 512000 18500 493500 4%
/System/Volumes/iSCPreboot
/dev/disk1s3 apfs 512000 18500 493500 4%
/System/Volumes/Hardware
/dev/disk7s1 apfs 1953309744 573040608 1380269136 30% /Volumes/STORAGE
This is MacOS 12.6, which is older than most should be using. I haven't
tested earlier versions.
> 2) needs to be able to exclude or "include only" certain strings in the
> output using regex patterns. Maybe -v, like egrep has, or -x for "eXclude"
> (Apple's version doesn't)
The GNU version of 'df' already has the -x option to exclude file system
types. I can exclude apfs file systems like so (which is all of them on
this machine):
$ ./src/df -x apfs
df: no file systems processed
For other fields I think that 'df | grep -v text' works fine.
> 3) the column spacing should be computed on the filtered output.
>
> 4) these features should work on any locale, even utf-8 with characters
> outside of ISOLatin1
The width of characters is computed using multibyte-aware functions.
Collin
[1] https://github.com/apple-oss-distributions/file_cmds/blob/main/df/df.c
