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