Re: [9fans] Unescaped "From" in mail items

[erik quanstrom <quanstro@coraid.com>]

> Acme mail now reports multiple messages in the destination folders such
> as:
>
> 111/	$199
> 110/	$349
> 109/	Apple <News@InsideApple.Apple.com>	Tue 19 Jun 2007
> 	iPod Gift Wrapping is now available.
>
> upas/nedmail reports that the folder has 0 items in it, Acme mail that
> it has 136 items.
>
> Were the messages on the original server invalid before I started, is
> acme mail handling them incorrectly when saving, or does upas/fs not
> interpret them correctly after they've been saved locally?

this depends on your perspective.  upas says that's invalid.  this is what
i use to solve the problem by editing the mail.  (sed converts to
runes -- that's why it is avoided.)

- erik

; cat qfrom.c
/*
 * quote from lines without messing with character encoding.
 *	(might rather just undo the character encoding and use sed.)
 */

#include <u.h>
#include <libc.h>
#include <bio.h>

void
qfrom(int fd)
{
	Biobuf b, bo;
	char *s;
	int l;

	if(Binit(&b, fd, OREAD) == -1)
		sysfatal("Binit: %r");
	if(Binit(&bo, 1, OWRITE) == -1)
		sysfatal("Binit: %r");

	while(s = Brdstr(&b, '\n', 0)){
		l = Blinelen(&b);
		if(l >= 5)
		if(memcmp(s, "From ", 5) == 0)
			Bputc(&bo, ' ');
		Bwrite(&bo, s, l);
		free(s);
	}
	Bterm(&b);
	Bterm(&bo);
}

void
usage(void)
{
	fprint(2, "usage: qfrom [files...]\n");
	exits("");
}

void
main(int argc, char **argv)
{
	int fd;

	ARGBEGIN{
	default:
		usage();
	}ARGEND

	if(*argv == 0){
		qfrom(0);
		exits("");
	}
	for(; *argv; argv++){
		fd = open(*argv, OREAD);
		if(fd == -1)
			sysfatal("open: %r");
		qfrom(fd);
		close(fd);
	}
	exits("");
}