1 /* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * All rights reserved. 5 * 6 * This code is derived from software donated to Berkeley by 7 * Jan-Simon Pendry. 8 * 9 * %sccs.include.redist.c% 10 * 11 * @(#)pt_file.c 8.3 (Berkeley) 07/03/94 12 * 13 * $Id: pt_file.c,v 1.1 1992/05/25 21:43:09 jsp Exp jsp $ 14 */ 15 16 #include <stdio.h> 17 #include <unistd.h> 18 #include <stdlib.h> 19 #include <string.h> 20 #include <errno.h> 21 #include <fcntl.h> 22 #include <sys/types.h> 23 #include <sys/param.h> 24 #include <sys/syslog.h> 25 26 #include "portald.h" 27 28 int portal_file(pcr, key, v, so, fdp) 29 struct portal_cred *pcr; 30 char *key; 31 char **v; 32 int so; 33 int *fdp; 34 { 35 int fd; 36 char pbuf[MAXPATHLEN]; 37 int error; 38 gid_t gidset[NGROUPS]; 39 int i; 40 41 pbuf[0] = '/'; 42 strcpy(pbuf+1, key + (v[1] ? strlen(v[1]) : 0)); 43 44 #ifdef DEBUG 45 printf("path = %s, uid = %d, gid = %d\n", pbuf, pcr->pcr_uid, pcr->pcr_groups[0]); 46 #endif 47 48 for (i = 0; i < pcr->pcr_ngroups; i++) 49 gidset[i] = pcr->pcr_groups[i]; 50 51 if (setgroups(pcr->pcr_ngroups, gidset) < 0) 52 return (errno); 53 54 if (seteuid(pcr->pcr_uid) < 0) 55 return (errno); 56 57 fd = open(pbuf, O_RDWR|O_CREAT, 0666); 58 if (fd < 0) 59 error = errno; 60 else 61 error = 0; 62 63 if (seteuid((uid_t) 0) < 0) { /* XXX - should reset gidset too */ 64 error = errno; 65 syslog(LOG_ERR, "setcred: %s", strerror(error)); 66 if (fd >= 0) { 67 (void) close(fd); 68 fd = -1; 69 } 70 } 71 72 if (error == 0) 73 *fdp = fd; 74 75 #ifdef DEBUG 76 fprintf(stderr, "pt_file returns *fdp = %d, error = %d\n", *fdp, error); 77 #endif 78 79 return (error); 80 } 81