1 /*- 2 * Copyright (C) 1996 3 * David L. Nugent. 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 * 14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28 #ifndef lint 29 static const char rcsid[] = 30 "$FreeBSD$"; 31 #endif /* not lint */ 32 33 #include <pwd.h> 34 #include <grp.h> 35 #include <libutil.h> 36 #define _WITH_GETLINE 37 #include <stdio.h> 38 #include <string.h> 39 #include <stdlib.h> 40 #include <sys/param.h> 41 42 #include "pwupd.h" 43 44 static FILE * pwd_fp = NULL; 45 46 void 47 vendpwent(void) 48 { 49 if (pwd_fp != NULL) { 50 fclose(pwd_fp); 51 pwd_fp = NULL; 52 } 53 } 54 55 void 56 vsetpwent(void) 57 { 58 vendpwent(); 59 } 60 61 static struct passwd * 62 vnextpwent(char const *nam, uid_t uid, int doclose) 63 { 64 struct passwd *pw; 65 char *line; 66 size_t linecap; 67 ssize_t linelen; 68 69 pw = NULL; 70 line = NULL; 71 linecap = 0; 72 linelen = 0; 73 74 if (pwd_fp != NULL || (pwd_fp = fopen(getpwpath(_MASTERPASSWD), "r")) != NULL) { 75 while ((linelen = getline(&line, &linecap, pwd_fp)) > 0) { 76 /* Skip comments and empty lines */ 77 if (*line == '\n' || *line == '#') 78 continue; 79 /* trim latest \n */ 80 if (line[linelen - 1 ] == '\n') 81 line[linelen - 1] = '\0'; 82 pw = pw_scan(line, PWSCAN_MASTER); 83 if (uid != (uid_t)-1) { 84 if (uid == pw->pw_uid) 85 break; 86 } else if (nam != NULL) { 87 if (strcmp(nam, pw->pw_name) == 0) 88 break; 89 } else 90 break; 91 free(pw); 92 pw = NULL; 93 } 94 if (doclose) 95 vendpwent(); 96 } 97 free(line); 98 99 return (pw); 100 } 101 102 struct passwd * 103 vgetpwent(void) 104 { 105 return vnextpwent(NULL, -1, 0); 106 } 107 108 struct passwd * 109 vgetpwuid(uid_t uid) 110 { 111 return vnextpwent(NULL, uid, 1); 112 } 113 114 struct passwd * 115 vgetpwnam(const char * nam) 116 { 117 return vnextpwent(nam, -1, 1); 118 } 119 120 121 static FILE * grp_fp = NULL; 122 123 void 124 vendgrent(void) 125 { 126 if (grp_fp != NULL) { 127 fclose(grp_fp); 128 grp_fp = NULL; 129 } 130 } 131 132 RET_SETGRENT 133 vsetgrent(void) 134 { 135 vendgrent(); 136 #if defined(__FreeBSD__) 137 return 0; 138 #endif 139 } 140 141 static struct group * 142 vnextgrent(char const *nam, gid_t gid, int doclose) 143 { 144 struct group *gr; 145 char *line; 146 size_t linecap; 147 ssize_t linelen; 148 149 gr = NULL; 150 line = NULL; 151 linecap = 0; 152 linelen = 0; 153 154 if (grp_fp != NULL || (grp_fp = fopen(getgrpath(_GROUP), "r")) != NULL) { 155 while ((linelen = getline(&line, &linecap, grp_fp)) > 0) { 156 /* Skip comments and empty lines */ 157 if (*line == '\n' || *line == '#') 158 continue; 159 /* trim latest \n */ 160 if (line[linelen - 1 ] == '\n') 161 line[linelen - 1] = '\0'; 162 gr = gr_scan(line); 163 if (gid != (gid_t)-1) { 164 if (gid == gr->gr_gid) 165 break; 166 } else if (nam != NULL) { 167 if (strcmp(nam, gr->gr_name) == 0) 168 break; 169 } else 170 break; 171 free(gr); 172 gr = NULL; 173 } 174 if (doclose) 175 vendgrent(); 176 } 177 free(line); 178 179 return (gr); 180 } 181 182 struct group * 183 vgetgrent(void) 184 { 185 return vnextgrent(NULL, -1, 0); 186 } 187 188 189 struct group * 190 vgetgrgid(gid_t gid) 191 { 192 return vnextgrent(NULL, gid, 1); 193 } 194 195 struct group * 196 vgetgrnam(const char * nam) 197 { 198 return vnextgrent(nam, -1, 1); 199 } 200 201