Re: Broken pipe error

[Petr Janda <elekktretterr@xxxxxxxxxxxxxx>]

Matt,
Thanks, that "seems" to have fixed the problem. I havent tested 
. /locate.updatedb yet with this patch applied now, but I will give it a 
shot as soon as i move lots of files. Might just move DF source and 
pkgsrc directories around a bit and see if it makes a difference.

Cheers,

Petr

Matthew Dillon wrote:
> :Petr Janda wrote:
> :> Ok, it seems that I found a bug.
> :> 
> :> elevator# man ppp
> :> zcat: error writing to output: Broken pipe
> :> zcat: /usr/share/man/cat8/ppp.8.gz: uncompress failed
> :
> :Do you get that for all man pages or just ppp(8)?
> :
> :Sascha
> :
> :-- 
> :http://yoyodyne.ath.cx
>
>     The error is quite simply due to the fact that the pager program
>     (more) exited without reading all the input from the pipe.  It
>     only occurs sometimes because it depends on whether the pipe
>     direct-maps zcat's (gunzip's) write to the pager program's read.
>
>     But, of course, the pager program exited because the user quit out
>     of it before it read all the input from zcat.
>
>     I think the solution is to modify the 'man' program to pass the '-q'
>     option to zcat (gunzip), and to modify gunzip to do a
>     signal(SIGPIPE, SIG_IGN) when used with the -q option.
>
>     Petr, please try rebuilding the 'man' program and the gzip program 
>     using this patch.  Please tell me if it stops the errors.  Here is 
>     the build sequence after applying the patch:
>
> 	cd /usr/src/gnu/usr.bin/man
> 	make clean obj all install
> 	cd /usr/src/usr.bin/gzip
> 	make clean obj all install
>
>     Patch is included below.
>
> 					-Matt
> 					Matthew Dillon 
> 					<dillon@xxxxxxxxxxxxx>
>
> Index: gnu/usr.bin/man/Makefile.inc
> ===================================================================
> RCS file: /cvs/src/gnu/usr.bin/man/Makefile.inc,v
> retrieving revision 1.2
> diff -u -r1.2 Makefile.inc
> --- gnu/usr.bin/man/Makefile.inc	17 Jun 2003 04:25:46 -0000	1.2
> +++ gnu/usr.bin/man/Makefile.inc	14 Jul 2006 18:14:49 -0000
> @@ -22,7 +22,7 @@
>  refer=			/usr/bin/refer
>  grap=			# no grap
>  pic=			/usr/bin/pic
> -zcat=			/usr/bin/zcat
> +zcat=			/usr/bin/zcat -q
>  compress=		/usr/bin/gzip -c
>  compext=		.gz
>  
> Index: usr.bin/gzip/gzip.c
> ===================================================================
> RCS file: /cvs/src/usr.bin/gzip/gzip.c,v
> retrieving revision 1.5
> diff -u -r1.5 gzip.c
> --- usr.bin/gzip/gzip.c	31 Jan 2005 19:28:57 -0000	1.5
> +++ usr.bin/gzip/gzip.c	14 Jul 2006 18:17:11 -0000
> @@ -314,6 +314,7 @@
>  			break;
>  		case 'q':
>  			qflag = 1;
> +			signal(SIGPIPE, SIG_IGN);
>  			break;
>  		case 'r':
>  			rflag = 1;
>
>
>