From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <ba58fea577120a13ab8c9f5a6dd59018@quintile.net>
From: "Steve Simon" <steve@quintile.net>
Date: Wed,  2 Feb 2005 15:43:22 +0000
To: 9fans@cse.psu.edu
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Subject: [9fans] umlaut
Topicbox-Message-UUID: 3c93a3ce-eace-11e9-9e20-41e7f4b1d025

mail -s umlaut 9fans

Isn't the 'problem' that you are reading the rawunix headers
which don't honour the mime character set encoding, and then
processing them with sed which assumes its input is utf8?

There are many solutions to this, most are ugly (use ape's sed)
or a load of work (upas/fs to support a cookedunix file).
My prefered solution is to replace sed with a trivial c prog
in pipeto.lib:

/*
 * upas/padfrom - prevent upas/fs from miss interpreting
 * the work From in email messages
 */
#include <u.h>
#include <libc.h>
#include <bio.h>

main()
{
	char *p;
	Biobuf bi, bo;

	Binit(&bi, 0, OREAD);
	Binit(&bo, 1, OWRITE);

	while ((p = Brdline(&bi, '\n')) != nil && Blinelen(&bi) > 1)
		Bwrite(&bo, p, Blinelen(&bi));
	while ((p = Brdline(&bi, '\n')) != nil){
		if (strncmp(p, "From ", 5) == 0)
			Bputc(&bo, ' ');
		Bwrite(&bo, p, Blinelen(&bi));
	}
}