1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 #if 0 36 static const char sccsid[] = "@(#)getgrent.c 8.2 (Berkeley) 3/21/94"; 37 #endif 38 static const char rcsid[] = 39 "$FreeBSD: src/libexec/mknetid/parse_group.c,v 1.6 1999/08/28 00:09:42 peter Exp $"; 40 #endif /* not lint */ 41 42 /* 43 * This is a slightly modified chunk of getgrent(3). All the YP support 44 * and unneeded functions have been stripped out. 45 */ 46 47 #include <sys/types.h> 48 #include <grp.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 53 FILE *_gr_fp; 54 static struct group _gr_group; 55 static int _gr_stayopen; 56 static int grscan(), start_gr(); 57 58 #define MAXGRP 200 59 static char *members[MAXGRP]; 60 #define MAXLINELENGTH 1024 61 static char line[MAXLINELENGTH]; 62 63 struct group * 64 _getgrent() 65 { 66 if (!_gr_fp && !start_gr()) { 67 return NULL; 68 } 69 70 71 if (!grscan(0, 0, NULL)) 72 return(NULL); 73 return(&_gr_group); 74 } 75 76 static int 77 start_gr() 78 { 79 return 1; 80 } 81 82 int 83 _setgroupent(stayopen) 84 int stayopen; 85 { 86 if (!start_gr()) 87 return(0); 88 _gr_stayopen = stayopen; 89 return(1); 90 } 91 92 int 93 _setgrent() 94 { 95 return(_setgroupent(0)); 96 } 97 98 void 99 _endgrent() 100 { 101 if (_gr_fp) { 102 (void)fclose(_gr_fp); 103 _gr_fp = NULL; 104 } 105 } 106 107 static int 108 grscan(search, gid, name) 109 register int search, gid; 110 register char *name; 111 { 112 register char *cp, **m; 113 char *bp; 114 for (;;) { 115 if (!fgets(line, sizeof(line), _gr_fp)) 116 return(0); 117 bp = line; 118 /* skip lines that are too big */ 119 if (!index(line, '\n')) { 120 int ch; 121 122 while ((ch = getc(_gr_fp)) != '\n' && ch != EOF) 123 ; 124 continue; 125 } 126 if ((_gr_group.gr_name = strsep(&bp, ":\n")) == NULL) 127 break; 128 if (_gr_group.gr_name[0] == '+') 129 continue; 130 131 if (search && name) { 132 if(strcmp(_gr_group.gr_name, name)) { 133 continue; 134 } 135 } 136 if ((_gr_group.gr_passwd = strsep(&bp, ":\n")) == NULL) 137 break;; 138 if (!(cp = strsep(&bp, ":\n"))) 139 continue; 140 _gr_group.gr_gid = atoi(cp); 141 if (search && name == NULL && _gr_group.gr_gid != gid) 142 continue; 143 cp = NULL; 144 if (bp == NULL) /* !! Must check for this! */ 145 break; 146 for (m = _gr_group.gr_mem = members;; bp++) { 147 if (m == &members[MAXGRP - 1]) 148 break; 149 if (*bp == ',') { 150 if (cp) { 151 *bp = '\0'; 152 *m++ = cp; 153 cp = NULL; 154 } 155 } else if (*bp == '\0' || *bp == '\n' || *bp == ' ') { 156 if (cp) { 157 *bp = '\0'; 158 *m++ = cp; 159 } 160 break; 161 } else if (cp == NULL) 162 cp = bp; 163 } 164 *m = NULL; 165 return(1); 166 } 167 /* NOTREACHED */ 168 return (0); 169 } 170