xref: /src/usr.sbin/rpc.pcnfsd/pcnfsd_v2.c

/*	$NetBSD: pcnfsd_v2.c,v 1.14 2018/01/23 21:06:25 sevan Exp $	*/

/* RE_SID: @(%)/usr/dosnfs/shades_SCCS/unix/pcnfsd/v2/src/SCCS/s.pcnfsd_v2.c 1.2 91/12/18 13:26:13 SMI */
/*
**=====================================================================
** Copyright (c) 1986,1987,1988,1989,1990,1991 by Sun Microsystems, Inc.
**	@(#)pcnfsd_v2.c	1.2	12/18/91
**=====================================================================
*/
/*
**=====================================================================
**             I N C L U D E   F I L E   S E C T I O N                *
**                                                                    *
** If your port requires different include files, add a suitable      *
** #define in the customization section, and make the inclusion or    *
** exclusion of the files conditional on this.                        *
**=====================================================================
*/

#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/stat.h>

#include <grp.h>
#include <netdb.h>
#include <pwd.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#ifdef USE_YP
#include <rpcsvc/ypclnt.h>
#endif

#ifndef SYSV
#include <sys/wait.h>
#endif

#ifdef ISC_2_0
#include <sys/fcntl.h>
#endif

#ifdef SHADOW_SUPPORT
#include <shadow.h>
#endif

#include "common.h"
#include "pcnfsd.h"
#include "extern.h"

/*
**=====================================================================
**                      C O D E   S E C T I O N                       *
**=====================================================================
*/


static char no_comment[] = "No comment";
static char not_supported[] = "Not supported";
static char pcnfsd_version[] = "@(#)pcnfsd_v2.c	1.2 - rpc.pcnfsd V2.0 (c) 1991 Sun Technology Enterprises, Inc.";

/*ARGSUSED*/
void   *
pcnfsd2_null_2_svc(void *arg, struct svc_req *req)
{
	static char dummy;
	return ((void *) &dummy);
}

v2_auth_results *
pcnfsd2_auth_2_svc(v2_auth_args *arg, struct svc_req *req)
{
	static v2_auth_results r;

	char    uname[32];
	char    pw[64];
	int     c1, c2;
	struct passwd *p;
	static u_int extra_gids[EXTRAGIDLEN];
	static char home[256];
#ifdef USE_YP
	char   *yphome;
	char   *cp;
#endif				/* USE_YP */


	r.stat = AUTH_RES_FAIL;	/* assume failure */
	r.uid = (int) -2;
	r.gid = (int) -2;
	r.cm = &no_comment[0];
	r.gids.gids_len = 0;
	r.gids.gids_val = &extra_gids[0];
	home[0] = '\0';
	r.home = &home[0];
	r.def_umask = umask(0);
	(void) umask(r.def_umask);	/* or use 022 */

	scramble(arg->id, uname);
	scramble(arg->pw, pw);

#ifdef USER_CACHE
	if (check_cache(uname, pw, &r.uid, &r.gid)) {
		r.stat = AUTH_RES_OK;
#ifdef WTMP
		wlogin(uname, req);
#endif
		fillin_extra_groups
		    (uname, r.gid, &r.gids.gids_len, extra_gids);
#ifdef USE_YP
		yphome = find_entry(uname, "auto.home");
		if (yphome) {
			strlcpy(home, yphome, sizeof(home));
			free(yphome);
			cp = strchr(home, ':');
			cp++;
			cp = strchr(cp, ':');
			if (cp)
				*cp = '/';
		}
#endif
		return (&r);
	}
#endif

	p = get_password(uname);
	if (p == NULL)
		return (&r);

	c1 = strlen(pw);
	c2 = strlen(p->pw_passwd);
	if ((c1 && !c2) || (c2 && !c1) ||
	    (strcmp(p->pw_passwd, crypt(pw, p->pw_passwd)))) {
		return (&r);
	}
	r.stat = AUTH_RES_OK;
	r.uid = p->pw_uid;
	r.gid = p->pw_gid;
#ifdef WTMP
	wlogin(uname, req);
#endif
	fillin_extra_groups(uname, r.gid, &r.gids.gids_len, extra_gids);

#ifdef USE_YP
	yphome = find_entry(uname, "auto.home");
	if (yphome) {
		strlcpy(home, yphome, sizeof(home));
		free(yphome);
		cp = strchr(home, ':');
		cp++;
		cp = strchr(cp, ':');
		if (cp)
			*cp = '/';
	}
#endif

#ifdef USER_CACHE
	add_cache_entry(p);
#endif

	return (&r);

}

v2_pr_init_results *
pcnfsd2_pr_init_2_svc(v2_pr_init_args *arg, struct svc_req *req)
{
	static v2_pr_init_results res;

	res.stat =
	    (pirstat) pr_init(arg->system, arg->pn, &res.dir);
	res.cm = &no_comment[0];


	return (&res);
}

v2_pr_start_results *
pcnfsd2_pr_start_2_svc(v2_pr_start_args *arg, struct svc_req *req)
{
	static v2_pr_start_results res;

	res.stat =
	    (psrstat) pr_start2(arg->system, arg->pn, arg->user,
	    arg->file, arg->opts, &res.id);
	res.cm = &no_comment[0];

	return (&res);
}
/*ARGSUSED*/
v2_pr_list_results *
pcnfsd2_pr_list_2_svc(void *arg, struct svc_req *req)
{
	static v2_pr_list_results res;

	if (printers == NULL)
		(void) build_pr_list();
	res.cm = &no_comment[0];
	res.printers = printers;

	return (&res);
}

v2_pr_queue_results *
pcnfsd2_pr_queue_2_svc(v2_pr_queue_args *arg, struct svc_req *req)
{
	static v2_pr_queue_results res;

	res.stat = build_pr_queue(arg->pn, arg->user,
	    arg->just_mine, &res.qlen, &res.qshown);
	res.cm = &no_comment[0];
	res.just_yours = arg->just_mine;
	res.jobs = queue;


	return (&res);
}

v2_pr_status_results *
pcnfsd2_pr_status_2_svc(v2_pr_status_args *arg, struct svc_req *req)
{
	static v2_pr_status_results res;
	static char status[128];

	res.stat = get_pr_status(arg->pn, &res.avail, &res.printing,
	    &res.qlen, &res.needs_operator, &status[0], sizeof(status));
	res.status = &status[0];
	res.cm = &no_comment[0];

	return (&res);
}

v2_pr_cancel_results *
pcnfsd2_pr_cancel_2_svc(v2_pr_cancel_args *arg, struct svc_req *req)
{
	static v2_pr_cancel_results res;

	res.stat = pr_cancel(arg->pn, arg->user, arg->id);
	res.cm = &no_comment[0];

	return (&res);
}
/*ARGSUSED*/
v2_pr_requeue_results *
pcnfsd2_pr_requeue_2_svc(v2_pr_requeue_args *arg, struct svc_req *req)
{
	static v2_pr_requeue_results res;
	res.stat = PC_RES_FAIL;
	res.cm = &not_supported[0];

	return (&res);
}
/*ARGSUSED*/
v2_pr_hold_results *
pcnfsd2_pr_hold_2_svc(v2_pr_hold_args *arg, struct svc_req *req)
{
	static v2_pr_hold_results res;

	res.stat = PC_RES_FAIL;
	res.cm = &not_supported[0];

	return (&res);
}
/*ARGSUSED*/
v2_pr_release_results *
pcnfsd2_pr_release_2_svc(v2_pr_release_args *arg, struct svc_req *req)
{
	static v2_pr_release_results res;

	res.stat = PC_RES_FAIL;
	res.cm = &not_supported[0];

	return (&res);
}
/*ARGSUSED*/
v2_pr_admin_results *
pcnfsd2_pr_admin_2_svc(v2_pr_admin_args *arg, struct svc_req *req)
{
	static v2_pr_admin_results res;
/*
** The default action for admin is to fail.
** If someone wishes to implement an administration
** mechanism, and isn't worried about the security
** holes, go right ahead.
*/

	res.cm = &not_supported[0];
	res.stat = PI_RES_FAIL;

	return (&res);
}

void
free_mapreq_results(mapreq_res p)
{
	if (p->mapreq_next)
		free_mapreq_results(p->mapreq_next);	/* recurse */
	if (p->name)
		(void) free(p->name);
	(void) free(p);
	return;
}

static char *my_strdup(const char *);

static char *
my_strdup(const char *s)
{
	size_t len;
	char   *r;
	len = strlen(s);
	r = (char *) grab(len + 1);
	memcpy(r, s, len + 1);
	return (r);
}

v2_mapid_results *
pcnfsd2_mapid_2_svc(v2_mapid_args *arg, struct svc_req *req)
{
	static v2_mapid_results res;
	struct passwd *p_passwd;
	struct group *p_group;

	mapreq_arg a;
	mapreq_res next_r;
	mapreq_res last_r = NULL;


	if (res.res_list) {
		free_mapreq_results(res.res_list);
		res.res_list = NULL;
	}
	a = arg->req_list;
	while (a) {
		next_r = (struct mapreq_res_item *)
		    grab(sizeof(struct mapreq_res_item));
		next_r->stat = MAP_RES_UNKNOWN;
		next_r->req = a->req;
		next_r->id = a->id;
		next_r->name = NULL;
		next_r->mapreq_next = NULL;

		if (last_r == NULL)
			res.res_list = next_r;
		else
			last_r->mapreq_next = next_r;
		last_r = next_r;
		switch (a->req) {
		case MAP_REQ_UID:
			p_passwd = getpwuid((uid_t) a->id);
			if (p_passwd) {
				next_r->name = my_strdup(p_passwd->pw_name);
				next_r->stat = MAP_RES_OK;
			}
			break;
		case MAP_REQ_GID:
			p_group = getgrgid((gid_t) a->id);
			if (p_group) {
				next_r->name = my_strdup(p_group->gr_name);
				next_r->stat = MAP_RES_OK;
			}
			break;
		case MAP_REQ_UNAME:
			next_r->name = my_strdup(a->name);
			p_passwd = getpwnam(a->name);
			if (p_passwd) {
				next_r->id = p_passwd->pw_uid;
				next_r->stat = MAP_RES_OK;
			}
			break;
		case MAP_REQ_GNAME:
			next_r->name = my_strdup(a->name);
			p_group = getgrnam(a->name);
			if (p_group) {
				next_r->id = p_group->gr_gid;
				next_r->stat = MAP_RES_OK;
			}
			break;
		}
		if (next_r->name == NULL)
			next_r->name = my_strdup("");
		a = a->mapreq_next;
	}

	res.cm = &no_comment[0];

	return (&res);
}


/*ARGSUSED*/
v2_alert_results *
pcnfsd2_alert_2_svc(v2_alert_args *arg, struct svc_req *req)
{
	static v2_alert_results res;

	res.stat = ALERT_RES_FAIL;
	res.cm = &not_supported[0];

	return (&res);
}
/*ARGSUSED*/
v2_info_results *
pcnfsd2_info_2_svc(v2_info_args *arg, struct svc_req *req)
{
	static v2_info_results res;
	static int facilities[FACILITIESMAX];
	static int onetime = 1;

#define UNSUPPORTED -1
#define QUICK 100
#define SLOW 2000

	if (onetime) {
		onetime = 0;
		facilities[PCNFSD2_NULL] = QUICK;
		facilities[PCNFSD2_INFO] = QUICK;
		facilities[PCNFSD2_PR_INIT] = QUICK;
		facilities[PCNFSD2_PR_START] = SLOW;
		facilities[PCNFSD2_PR_LIST] = QUICK;	/* except first time */
		facilities[PCNFSD2_PR_QUEUE] = SLOW;
		facilities[PCNFSD2_PR_STATUS] = SLOW;
		facilities[PCNFSD2_PR_CANCEL] = SLOW;
		facilities[PCNFSD2_PR_ADMIN] = UNSUPPORTED;
		facilities[PCNFSD2_PR_REQUEUE] = UNSUPPORTED;
		facilities[PCNFSD2_PR_HOLD] = UNSUPPORTED;
		facilities[PCNFSD2_PR_RELEASE] = UNSUPPORTED;
		facilities[PCNFSD2_MAPID] = QUICK;
		facilities[PCNFSD2_AUTH] = QUICK;
		facilities[PCNFSD2_ALERT] = QUICK;
	}
	res.facilities.facilities_len = PCNFSD2_ALERT + 1;
	res.facilities.facilities_val = facilities;

	res.vers = &pcnfsd_version[0];
	res.cm = &no_comment[0];

	return (&res);
}



void
fillin_extra_groups(char *uname, gid_t main_gid, int *len, gid_t extra_gids[EXTRAGIDLEN])
{
	struct group *grp;
	__aconst char *__aconst *members;
	int     n = 0;

	setgrent();

	while (n < EXTRAGIDLEN) {
		grp = getgrent();
		if (grp == NULL)
			break;
		if (grp->gr_gid == main_gid)
			continue;
		for (members = grp->gr_mem; members && *members; members++) {
			if (!strcmp(*members, uname)) {
				extra_gids[n++] = grp->gr_gid;
				break;
			}
		}
	}
	endgrent();
	*len = n;
}

#ifdef USE_YP
/* the following is from rpcsvc/yp_prot.h */
#define YPMAXDOMAIN 64

/*
 * find_entry returns NULL on any error (printing a message) and
 * otherwise returns a pointer to the malloc'd result. The caller
 * is responsible for free()ing the result string.
 */
char   *
find_entry(const char *key, const char *map)
{
	int     err;
	char   *val = NULL;
	char   *cp;
	int     len = 0;
	static char domain[YPMAXDOMAIN + 1];

	if (getdomainname(domain, YPMAXDOMAIN)) {
		msg_out("rpc.pcnfsd: getdomainname failed");
		return (NULL);
	}
	if ((err = yp_bind(domain)) != 0) {
#ifdef	DEBUG
		msg_out("rpc.pcnfsd: yp_bind failed");
#endif
		return (NULL);
	}
	err = yp_match(domain, map, key, strlen(key), &val, &len);

	if (err) {
		msg_out("rpc.pcnfsd: yp_match failed");
		if (val)
			free(val);
		return (NULL);
	}
	if ((cp = strchr(val, '\n')) != NULL)
		*cp = '\0';	/* in case we get an extra NL at the end */
	return (val);
}
#endif