Subversion Repositories planix.SVN

#include <u.h>

#include <sys/socket.h>

#include <sys/un.h>

#include <ctype.h>

#include <pwd.h>

#include <libc.h>

#include <auth.h>

#include <fcall.h>

#include <authsrv.h>

#include <libsec.h>

#include "drawterm.h"

#undef socket

#undef connect

#undef getenv

#undef access

char*

getuser(void)

{

	static char user[64];

	struct passwd *pw;

	pw = getpwuid(getuid());

	if(pw == nil)

		return "none";

	strecpy(user, user+sizeof user, pw->pw_name);

	return user;

}

/*

 * Absent other hints, it works reasonably well to use

 * the X11 display name as the name space identifier.

 * This is how sam's B has worked since the early days.

 * Since most programs using name spaces are also using X,

 * this still seems reasonable.  Terminal-only sessions

 * can set $NAMESPACE.

 */

static char*

nsfromdisplay(void)

{

	char *disp, *p;

	if((disp = getenv("DISPLAY")) == nil){

		werrstr("$DISPLAY not set");

		return nil;

	}

	/* canonicalize: xxx:0.0 => xxx:0 */

	p = strrchr(disp, ':');

	if(p){

		p++;

		while(isdigit((uchar)*p))

			p++;

		if(strcmp(p, ".0") == 0)

			*p = 0;

	}

	return smprint("/tmp/ns.%s.%s", getuser(), disp);

}

char*

getns(void)

{

	char *ns;

	ns = getenv("NAMESPACE");

	if(ns == nil)

		ns = nsfromdisplay();

	if(ns == nil){

		werrstr("$NAMESPACE not set, %r");

		return nil;

	}

	return ns;

}

int

dialfactotum(void)

{

	int fd;

	struct sockaddr_un su;

	char *name;

	name = smprint("%s/factotum", getns());

	if(name == nil || access(name, 0) < 0)

		return -1;

	memset(&su, 0, sizeof su);

	su.sun_family = AF_UNIX;

	if(strlen(name)+1 > sizeof su.sun_path){

		werrstr("socket name too long");

		return -1;

	}

	strcpy(su.sun_path, name);

	if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0){

		werrstr("socket: %r");

		return -1;

	}

	if(connect(fd, (struct sockaddr*)&su, sizeof su) < 0){

		werrstr("connect %s: %r", name);

		close(fd);

		return -1;

	}

	return lfdfd(fd);

}