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 #include <stdio.h> 37 #include <string.h> 38 #include <stdlib.h> 39 #include <err.h> 40 41 #include "pwupd.h" 42 43 static FILE * pwd_fp = NULL; 44 45 void 46 vendpwent(void) 47 { 48 if (pwd_fp != NULL) { 49 fclose(pwd_fp); 50 pwd_fp = NULL; 51 } 52 } 53 54 void 55 vsetpwent(void) 56 { 57 vendpwent(); 58 } 59 60 static struct passwd * 61 vnextpwent(char const *nam, uid_t uid, int doclose) 62 { 63 struct passwd *pw; 64 char *line; 65 size_t linecap; 66 ssize_t linelen; 67 68 pw = NULL; 69 line = NULL; 70 linecap = 0; 71 72 if (pwd_fp != NULL || (pwd_fp = fopen(getpwpath(_MASTERPASSWD), "r")) != NULL) { 73 while ((linelen = getline(&line, &linecap, pwd_fp)) > 0) { 74 /* Skip comments and empty lines */ 75 if (*line == '\n' || *line == '#') 76 continue; 77 /* trim latest \n */ 78 if (line[linelen - 1 ] == '\n') 79 line[linelen - 1] = '\0'; 80 pw = pw_scan(line, PWSCAN_MASTER); 81 if (pw == NULL) 82 errx(EXIT_FAILURE, "Invalid user entry in '%s':" 83 " '%s'", getpwpath(_MASTERPASSWD), line); 84 if (uid != (uid_t)-1) { 85 if (uid == pw->pw_uid) 86 break; 87 } else if (nam != NULL) { 88 if (strcmp(nam, pw->pw_name) == 0) 89 break; 90 } else 91 break; 92 free(pw); 93 pw = NULL; 94 } 95 if (doclose) 96 vendpwent(); 97 } 98 free(line); 99 100 return (pw); 101 } 102 103 struct passwd * 104 vgetpwent(void) 105 { 106 return vnextpwent(NULL, -1, 0); 107 } 108 109 struct passwd * 110 vgetpwuid(uid_t uid) 111 { 112 return vnextpwent(NULL, uid, 1); 113 } 114 115 struct passwd * 116 vgetpwnam(const char * nam) 117 { 118 return vnextpwent(nam, -1, 1); 119 } 120 121 122 static FILE * grp_fp = NULL; 123 124 void 125 vendgrent(void) 126 { 127 if (grp_fp != NULL) { 128 fclose(grp_fp); 129 grp_fp = NULL; 130 } 131 } 132 133 void 134 vsetgrent(void) 135 { 136 vendgrent(); 137 } 138 139 static struct group * 140 vnextgrent(char const *nam, gid_t gid, int doclose) 141 { 142 struct group *gr; 143 char *line; 144 size_t linecap; 145 ssize_t linelen; 146 147 gr = NULL; 148 line = NULL; 149 linecap = 0; 150 151 if (grp_fp != NULL || (grp_fp = fopen(getgrpath(_GROUP), "r")) != NULL) { 152 while ((linelen = getline(&line, &linecap, grp_fp)) > 0) { 153 /* Skip comments and empty lines */ 154 if (*line == '\n' || *line == '#') 155 continue; 156 /* trim latest \n */ 157 if (line[linelen - 1 ] == '\n') 158 line[linelen - 1] = '\0'; 159 gr = gr_scan(line); 160 if (gr == NULL) 161 errx(EXIT_FAILURE, "Invalid group entry in '%s':" 162 " '%s'", getgrpath(_GROUP), 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