1130b656e5
This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
109 lines
3.2 KiB
C
109 lines
3.2 KiB
C
/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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* All rights reserved.
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*
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* This code is derived from software donated to Berkeley by
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* Jan-Simon Pendry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)pt_file.c 8.2 (Berkeley) 3/27/94
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*
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* $FreeBSD$
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/syslog.h>
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#include "portald.h"
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int portal_file(pcr, key, v, so, fdp)
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struct portal_cred *pcr;
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char *key;
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char **v;
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int so;
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int *fdp;
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{
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int fd;
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char pbuf[MAXPATHLEN];
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int error;
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gid_t gidset[NGROUPS];
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int i;
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pbuf[0] = '/';
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strcpy(pbuf+1, key + (v[1] ? strlen(v[1]) : 0));
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#ifdef DEBUG
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printf("path = %s, uid = %d, gid = %d\n", pbuf, pcr->pcr_uid, pcr->pcr_groups[0]);
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printf ("fflag = %x, oflag = %x\n", pcr->pcr_flag, (pcr->pcr_flag)-1);
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#endif
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for (i = 0; i < pcr->pcr_ngroups; i++)
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gidset[i] = pcr->pcr_groups[i];
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if (setgroups(pcr->pcr_ngroups, gidset) < 0)
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return (errno);
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if (seteuid(pcr->pcr_uid) < 0)
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return (errno);
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/* dmb convert kernel flags to oflags, see <fcntl.h> */
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fd = open(pbuf, (pcr->pcr_flag)-1, 0777);
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if (fd < 0)
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error = errno;
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else
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error = 0;
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if (seteuid((uid_t) 0) < 0) { /* XXX - should reset gidset too */
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error = errno;
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syslog(LOG_ERR, "setcred: %s", strerror(error));
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if (fd >= 0) {
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(void) close(fd);
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fd = -1;
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}
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}
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if (error == 0)
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*fdp = fd;
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#ifdef DEBUG
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fprintf(stderr, "pt_file returns *fdp = %d, error = %d\n", *fdp, error);
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#endif
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return (error);
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}
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