Re: Lastest busybox git prints lines before and after diff lines. (Not in recent change.

On 24 Aug 2026 at 22:52, mjmouse9999 wrote:

Date sent:      	Mon, 24 Aug 2026 22:52:36 +1000
Subject:        	Re: Lastest busybox git prints lines before and 
after diff lines.
	(Not in recent change.
To:             	[email protected]
From:           	mjmouse9999 <[email protected]>

> The formatting is a unified diff.
> 
> Looking at 8f7d38970046c0ea53de911084561b79ffb2d6b9
> when diff was originally added to busybox it also only
> did unified diffs.

Thanks for the reply. Don't think I had used the busybox diff in 
past. Mostly do work with Fedora machines, but was doing testing 
booted into my G4L kernel image, and was comparing a test script 
in which blocksize was changed from 1M to 4M. Did the diff linked 
to busybox and it gave 151 lines? Switched to a Fedora machine 
and did same diff and it came back with 108 lines. 

These options produce 81 and 83 lines,  so close, but not identicle.

diff g4l30o14 g4l30o14b | grep -v "\---" >/tmp/difff
busybox diff -U 0 g4l30o14 g4l30o14b >/tmp/diffb

But now know the commands are different.
Thanks for the quick reply. Even installed the Fedora repo 1.37 
version, and it does the same. 


> 
> There is a -U flag to change how much context:
> 
>      busybox diff -U1 <(echo $'a\nb\nc\nd\nex\nf\ng') \
>        <(echo $'a\nb\nc\nd\ne\nf\ng')
> 
>      --- /dev/fd/63
>      +++ /dev/fd/62
>      @@ -4,3 +4,3 @@
>       d
>      -ex
>      +e
>       f
> 
> On 24/8/26 22:21, Michael D. Setzer II via busybox wrote:
> > Checked a machine with previous busybox and it did same, so some
> > earlier change?
> >
> > On 24 Aug 2026 at 22:02, Michael D. Setzer II via busy wrote:
> >
> > To:             	[email protected]
> > Date sent:      	Mon, 24 Aug 2026 22:02:04 +1000
> > Subject:        	Lastest busybox git prints lines before and after
> > diff lines.
> > Priority:       	normal
> > From:           	"Michael D. Setzer II via busybox"
> > <[email protected]>
> > Send reply to:  	[email protected]
> >
> >> Noticed a difference in diff between Fedora and busybox??
> >> Was comparing to files where lines with 1M changed to 4M
> >> But busybox outputting different lines.
> >> Fedora diff shows 108 lines while busybox diff is 151 lines?
> >> [...]


+------------------------------------------------------------+
 Michael D. Setzer II - Computer Science Instructor (Retired)     
 mailto:[email protected]                            
 mailto:[email protected]
 mailto:[email protected]
 Guam - Where America's Day Begins                        
 G4L Disk Imaging Project maintainer 
 http://sourceforge.net/projects/g4l/
+------------------------------------------------------------+



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