1 /* $OpenBSD: entries.c,v 1.3 2015/01/16 06:40:22 deraadt Exp $ */ 2 /* $FreeBSD$ */ 3 /* 4 * Copyright (c) 2008 Pierre-Yves Ritschard <pyr@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/types.h> 20 #include <sys/param.h> 21 #include <sys/queue.h> 22 #include <sys/socket.h> 23 #include <sys/tree.h> 24 25 #include <netinet/in.h> 26 #include <arpa/inet.h> 27 28 #include <errno.h> 29 #include <event.h> 30 #include <fcntl.h> 31 #include <unistd.h> 32 #include <pwd.h> 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <limits.h> 37 38 #include "ypldap.h" 39 40 void 41 flatten_entries(struct env *env) 42 { 43 size_t wrlen; 44 size_t len; 45 char *linep; 46 char *endp; 47 char *tmp; 48 struct userent *ue; 49 struct groupent *ge; 50 51 log_debug("flattening trees"); 52 /* 53 * This takes all the line pointers in RB elements and 54 * concatenates them in a single string, to be able to 55 * implement next element lookup without tree traversal. 56 * 57 * An extra octet is alloced to make space for an additional NUL. 58 */ 59 wrlen = env->sc_user_line_len; 60 if ((linep = calloc(1, env->sc_user_line_len + 1)) == NULL) { 61 /* 62 * XXX: try allocating a smaller chunk of memory 63 */ 64 fatal("out of memory"); 65 } 66 endp = linep; 67 68 RB_FOREACH(ue, user_name_tree, env->sc_user_names) { 69 /* 70 * we convert the first nul back to a column, 71 * copy the string and then convert it back to a nul. 72 */ 73 ue->ue_line[strlen(ue->ue_line)] = ':'; 74 log_debug("pushing line: %s", ue->ue_line); 75 len = strlen(ue->ue_line) + 1; 76 memcpy(endp, ue->ue_line, len); 77 endp[strcspn(endp, ":")] = '\0'; 78 free(ue->ue_line); 79 ue->ue_line = endp; 80 endp += len; 81 wrlen -= len; 82 83 /* 84 * To save memory strdup(3) the netid_line which originally used 85 * LINE_WIDTH bytes 86 */ 87 tmp = ue->ue_netid_line; 88 ue->ue_netid_line = strdup(tmp); 89 if (ue->ue_netid_line == NULL) { 90 fatal("out of memory"); 91 } 92 free(tmp); 93 } 94 env->sc_user_lines = linep; 95 log_debug("done pushing users"); 96 97 wrlen = env->sc_group_line_len; 98 if ((linep = calloc(1, env->sc_group_line_len + 1)) == NULL) { 99 /* 100 * XXX: try allocating a smaller chunk of memory 101 */ 102 fatal("out of memory"); 103 } 104 endp = linep; 105 RB_FOREACH(ge, group_name_tree, env->sc_group_names) { 106 /* 107 * we convert the first nul back to a column, 108 * copy the string and then convert it back to a nul. 109 */ 110 ge->ge_line[strlen(ge->ge_line)] = ':'; 111 log_debug("pushing line: %s", ge->ge_line); 112 len = strlen(ge->ge_line) + 1; 113 memcpy(endp, ge->ge_line, len); 114 endp[strcspn(endp, ":")] = '\0'; 115 free(ge->ge_line); 116 ge->ge_line = endp; 117 endp += len; 118 wrlen -= len; 119 } 120 env->sc_group_lines = linep; 121 log_debug("done pushing groups"); 122 } 123 124 int 125 userent_name_cmp(struct userent *ue1, struct userent *ue2) 126 { 127 return (strcmp(ue1->ue_line, ue2->ue_line)); 128 } 129 130 int 131 userent_uid_cmp(struct userent *ue1, struct userent *ue2) 132 { 133 return (ue1->ue_uid - ue2->ue_uid); 134 } 135 136 int 137 groupent_name_cmp(struct groupent *ge1, struct groupent *ge2) 138 { 139 return (strcmp(ge1->ge_line, ge2->ge_line)); 140 } 141 142 int 143 groupent_gid_cmp(struct groupent *ge1, struct groupent *ge2) 144 { 145 return (ge1->ge_gid - ge2->ge_gid); 146 } 147 148 RB_GENERATE(user_name_tree, userent, ue_name_node, userent_name_cmp); 149 RB_GENERATE(user_uid_tree, userent, ue_uid_node, userent_uid_cmp); 150 RB_GENERATE(group_name_tree, groupent, ge_name_node, groupent_name_cmp); 151 RB_GENERATE(group_gid_tree, groupent, ge_gid_node, groupent_gid_cmp); 152