[9fans] acme history

["Russ Cox" <rsc@plan9.bell-labs.com>]

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

void showmail(void);
void showedit(void);

void
usage(void)
{
	fprint(2, "usage: ahist\n");
	exits("usage");
}

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

	if(argc != 1)
		usage();

	if(chdir("/mnt/acme/new") < 0)
		sysfatal("chdir /mnt/acme/new: %r");

	if((fd = open("body", OWRITE)) < 0)
		sysfatal("open body: %r");
	dup(fd, 1);
	close(fd);
	if((fd = open("ctl", OWRITE)) < 0)
		sysfatal("open ctl: %r");
	fprint(fd, "name /history\n");
	close(fd);

	switch(fork()){
	case -1:
		sysfatal("fork: %r");
	case 0:
		showmail();
		_exits(nil);
	default:
		showedit();
		_exits(nil);
	}
}

void
showmail(void)
{
	int fd;
	Plumbmsg *m;

	fd = plumbopen("showmail", OREAD);
	while((m = plumbrecv(fd)) != nil){
		print("%s\n", m->data);
		plumbfree(m);
	}
}

void
showedit(void)
{
	int fd;
	Plumbmsg *m;
	char *addr, *filename;

	fd = plumbopen("edit", OREAD);
	while((m = plumbrecv(fd)) != nil){
		addr = plumblookup(m->attr, "addr");
		filename = plumblookup(m->attr, "filename");
		if(filename == nil)
			filename = m->data;
		if(addr && addr[0])
			print("%s:%s\n", filename, addr);
		else
			print("%s\n", filename);
		plumbfree(m);
	}
}