/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user or with the express written consent of
* Sun Microsystems, Inc.
*
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
*
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)netnamer.c 1.13 91/03/11 Copyr 1986 Sun Micro";
#endif
/*
* netname utility routines convert from unix names to network names and
* vice-versa This module is operating system dependent! What we define here
* will work with any unix system that has adopted the sun NIS domain
* architecture.
*/
#include <sys/param.h>
#include <rpc/rpc.h>
#include <rpc/rpc_com.h>
#ifdef YP
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#endif
#include <ctype.h>
#include <stdio.h>
#include <grp.h>
#include <pwd.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
static char *OPSYS = "unix";
#ifdef YP
static char *NETID = "netid.byname";
#endif
static char *NETIDFILE = "/etc/netid";
static int getnetid __P(( char *, char * ));
static int _getgroups __P(( char *, gid_t * ));
#ifndef NGROUPS
#define NGROUPS 16
#endif
/*
* Convert network-name into unix credential
*/
int
netname2user(netname, uidp, gidp, gidlenp, gidlist)
char netname[MAXNETNAMELEN + 1];
uid_t *uidp;
gid_t *gidp;
int *gidlenp;
gid_t *gidlist;
{
char *p;
int gidlen;
uid_t uid;
long luid;
struct passwd *pwd;
char val[1024];
char *val1, *val2;
char *domain;
int vallen;
int err;
if (getnetid(netname, val)) {
p = strtok(val, ":");
if (p == NULL)
return (0);
*uidp = (uid_t) atol(val);
p = strtok(NULL, "\n,");
*gidp = (gid_t) atol(p);
if (p == NULL) {
return (0);
}
gidlen = 0;
for (gidlen = 0; gidlen < NGROUPS; gidlen++) {
p = strtok(NULL, "\n,");
if (p == NULL)
break;
gidlist[gidlen] = (gid_t) atol(p);
}
*gidlenp = gidlen;
return (1);
}
val1 = strchr(netname, '.');
if (val1 == NULL)
return (0);
if (strncmp(netname, OPSYS, (val1-netname)))
return (0);
val1++;
val2 = strchr(val1, '@');
if (val2 == NULL)
return (0);
vallen = val2 - val1;
if (vallen > (1024 - 1))
vallen = 1024 - 1;
(void) strncpy(val, val1, 1024);
val[vallen] = 0;
err = _rpc_get_default_domain(&domain); /* change to rpc */
if (err)
return (0);
if (strcmp(val2 + 1, domain))
return (0); /* wrong domain */
if (sscanf(val, "%ld", &luid) != 1)
return (0);
uid = luid;
/* use initgroups method */
pwd = getpwuid(uid);
if (pwd == NULL)
return (0);
*uidp = pwd->pw_uid;
*gidp = pwd->pw_gid;
*gidlenp = _getgroups(pwd->pw_name, gidlist);
return (1);
}
/*
* initgroups
*/
static int
_getgroups(uname, groups)
char *uname;
gid_t groups[NGROUPS];
{
gid_t ngroups = 0;
register struct group *grp;
register int i;
register int j;
int filter;
setgrent();
while ((grp = getgrent())) {
for (i = 0; grp->gr_mem[i]; i++)
if (!strcmp(grp->gr_mem[i], uname)) {
if (ngroups == NGROUPS) {
#ifdef DEBUG
fprintf(stderr,
"initgroups: %s is in too many groups\n", uname);
#endif
goto toomany;
}
/* filter out duplicate group entries */
filter = 0;
for (j = 0; j < ngroups; j++)
if (groups[j] == grp->gr_gid) {
filter++;
break;
}
if (!filter)
groups[ngroups++] = grp->gr_gid;
}
}
toomany:
endgrent();
return (ngroups);
}
/*
* Convert network-name to hostname
*/
int
netname2host(netname, hostname, hostlen)
char netname[MAXNETNAMELEN + 1];
char *hostname;
int hostlen;
{
int err;
char valbuf[1024];
char *val;
char *val2;
int vallen;
char *domain;
if (getnetid(netname, valbuf)) {
val = valbuf;
if ((*val == '0') && (val[1] == ':')) {
(void) strncpy(hostname, val + 2, hostlen);
return (1);
}
}
val = strchr(netname, '.');
if (val == NULL)
return (0);
if (strncmp(netname, OPSYS, (val - netname)))
return (0);
val++;
val2 = strchr(val, '@');
if (val2 == NULL)
return (0);
vallen = val2 - val;
if (vallen > (hostlen - 1))
vallen = hostlen - 1;
(void) strncpy(hostname, val, vallen);
hostname[vallen] = 0;
err = _rpc_get_default_domain(&domain); /* change to rpc */
if (err)
return (0);
if (strcmp(val2 + 1, domain))
return (0); /* wrong domain */
else
return (1);
}
/*
* reads the file /etc/netid looking for a + to optionally go to the
* network information service.
*/
int
getnetid(key, ret)
char *key, *ret;
{
char buf[1024]; /* big enough */
char *res;
char *mkey;
char *mval;
FILE *fd;
#ifdef YP
char *domain;
int err;
char *lookup;
int len;
#endif
fd = fopen(NETIDFILE, "r");
if (fd == (FILE *) 0) {
#ifdef YP
res = "+";
goto getnetidyp;
#else
return (0);
#endif
}
for (;;) {
if (fd == (FILE *) 0)
return (0); /* getnetidyp brings us here */
res = fgets(buf, 1024, fd);
if (res == 0) {
fclose(fd);
return (0);
}
if (res[0] == '#')
continue;
else if (res[0] == '+') {
#ifdef YP
getnetidyp:
err = yp_get_default_domain(&domain);
if (err) {
continue;
}
lookup = NULL;
err = yp_match(domain, NETID, key,
strlen(key), &lookup, &len);
if (err) {
#ifdef DEBUG
fprintf(stderr, "match failed error %d\n", err);
#endif
continue;
}
lookup[len] = 0;
strcpy(ret, lookup);
free(lookup);
if (fd != NULL)
fclose(fd);
return (2);
#else /* YP */
#ifdef DEBUG
fprintf(stderr,
"Bad record in %s '+' -- NIS not supported in this library copy\n",
NETIDFILE);
#endif
continue;
#endif /* YP */
} else {
mkey = strtok(buf, "\t ");
if (mkey == NULL) {
fprintf(stderr,
"Bad record in %s -- %s", NETIDFILE, buf);
continue;
}
mval = strtok(NULL, " \t#\n");
if (mval == NULL) {
fprintf(stderr,
"Bad record in %s val problem - %s", NETIDFILE, buf);
continue;
}
if (strcmp(mkey, key) == 0) {
strcpy(ret, mval);
fclose(fd);
return (1);
}
}
}
}
