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 #include <err.h> 42 43 #include "pwupd.h" 44 45 static FILE * pwd_fp = NULL; 46 47 void 48 vendpwent(void) 49 { 50 if (pwd_fp != NULL) { 51 fclose(pwd_fp); 52 pwd_fp = NULL; 53 } 54 } 55 56 void 57 vsetpwent(void) 58 { 59 vendpwent(); 60 } 61 62 static struct passwd * 63 vnextpwent(char const *nam, uid_t uid, int doclose) 64 { 65 struct passwd *pw; 66 char *line; 67 size_t linecap; 68 ssize_t linelen; 69 70 pw = NULL; 71 line = NULL; 72 linecap = 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 (pw == NULL) 84 errx(EXIT_FAILURE, "Invalid user entry in '%s':" 85 " '%s'", getpwpath(_MASTERPASSWD), line); 86 if (uid != (uid_t)-1) { 87 if (uid == pw->pw_uid) 88 break; 89 } else if (nam != NULL) { 90 if (strcmp(nam, pw->pw_name) == 0) 91 break; 92 } else 93 break; 94 free(pw); 95 pw = NULL; 96 } 97 if (doclose) 98 vendpwent(); 99 } 100 free(line); 101 102 return (pw); 103 } 104 105 struct passwd * 106 vgetpwent(void) 107 { 108 return vnextpwent(NULL, -1, 0); 109 } 110 111 struct passwd * 112 vgetpwuid(uid_t uid) 113 { 114 return vnextpwent(NULL, uid, 1); 115 } 116 117 struct passwd * 118 vgetpwnam(const char * nam) 119 { 120 return vnextpwent(nam, -1, 1); 121 } 122 123 124 static FILE * grp_fp = NULL; 125 126 void 127 vendgrent(void) 128 { 129 if (grp_fp != NULL) { 130 fclose(grp_fp); 131 grp_fp = NULL; 132 } 133 } 134 135 RET_SETGRENT 136 vsetgrent(void) 137 { 138 vendgrent(); 139 #if defined(__FreeBSD__) 140 return 0; 141 #endif 142 } 143 144 static struct group * 145 vnextgrent(char const *nam, gid_t gid, int doclose) 146 { 147 struct group *gr; 148 char *line; 149 size_t linecap; 150 ssize_t linelen; 151 152 gr = NULL; 153 line = NULL; 154 linecap = 0; 155 156 if (grp_fp != NULL || (grp_fp = fopen(getgrpath(_GROUP), "r")) != NULL) { 157 while ((linelen = getline(&line, &linecap, grp_fp)) > 0) { 158 /* Skip comments and empty lines */ 159 if (*line == '\n' || *line == '#') 160 continue; 161 /* trim latest \n */ 162 if (line[linelen - 1 ] == '\n') 163 line[linelen - 1] = '\0'; 164 gr = gr_scan(line); 165 if (gr == NULL) 166 errx(EXIT_FAILURE, "Invalid group entry in '%s':" 167 " '%s'", getgrpath(_GROUP), line); 168 if (gid != (gid_t)-1) { 169 if (gid == gr->gr_gid) 170 break; 171 } else if (nam != NULL) { 172 if (strcmp(nam, gr->gr_name) == 0) 173 break; 174 } else 175 break; 176 free(gr); 177 gr = NULL; 178 } 179 if (doclose) 180 vendgrent(); 181 } 182 free(line); 183 184 return (gr); 185 } 186 187 struct group * 188 vgetgrent(void) 189 { 190 return vnextgrent(NULL, -1, 0); 191 } 192 193 194 struct group * 195 vgetgrgid(gid_t gid) 196 { 197 return vnextgrent(NULL, gid, 1); 198 } 199 200 struct group * 201 vgetgrnam(const char * nam) 202 { 203 return vnextgrent(nam, -1, 1); 204 } 205 206