Re: progress bar in cp

[Dmitry Ilyin]

24.07.2011 21:37, Diogo Sousa пишет:
> Hi,
>
> One feature that some users search for is a progress bar on the cp program.
>
> I would like to implement a progress bar in cp, would that patch be
> accepted? Is there any reason not to do it?
>
> Thank You,
> Diogo Sousa
Here are two implementations.

First is mine and second is someone else's.

There is also implementation here 
http://sources.gentoo.org/gentoo/src/patchsets/coreutils/ according to 
address@hidden

Looks like a lot of people want this feature, invent their own bicycles and 
kludges waiting for it to be added to coreutils.

FreeBSD (hmm looks like MacOS too) have Ctrl+T SIGINFO to see how much time left 
to copy file and lot of tools support it.

Linux has nothing. I dont care that Posix doesn't describe SIGINFO, it's 
usefull, bsd has it and people like it.

I tried to implement SIGINFO in Linux kernel but failed to understand all tty 
stuff (which i could easily understand in freebsd kernel), and i'm not even 
trying to add new signal. So I could only replace Ctrl+\ SIGQUIT with SIGUSR1 
which 'dd' does understand as print status and 'fsck' too. I'm very happy with 
this feature on my rescue USB flash.

So the best solution to sucking coreutils interactivity would be:
1) Implement some option (-B ?) to show dot progress bar AND show file name and 
percent completed on SIGUSR1.
2) Implement Ctrl+T to send SIGUSR1 or even implement SIGINFO if it's possible.
3) Add info print out to as many console tools as possible.
4) Ctrl+K to send SIGKILL would be nice (ok, ok at least we have MagicSysrq that 
does something like that, linux-only feature)

Yes I understand that nobody will do anything of that because (.... insert your 
argument here ....), well enjoy 0-1% OS market share))
Unfortunately i'm not kernel developer, well not even C programmer, and 
implementing this is far beyond my abilities.
Actually even if I improve my skills and implement this you will not take my 
patches to mainstream, neither will kernel developers because (.... insert a lot 
of agruments here ....) so I will just improve my USB rescue system.

copy.patch
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copy2.patch
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