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 len; 44 char *linep; 45 char *endp; 46 char *tmp; 47 struct userent *ue; 48 struct groupent *ge; 49 50 log_debug("flattening trees"); 51 /* 52 * This takes all the line pointers in RB elements and 53 * concatenates them in a single string, to be able to 54 * implement next element lookup without tree traversal. 55 * 56 * An extra octet is alloced to make space for an additional NUL. 57 */ 58 if ((linep = calloc(1, env->sc_user_line_len + 1)) == NULL) { 59 /* 60 * XXX: try allocating a smaller chunk of memory 61 */ 62 fatal("out of memory"); 63 } 64 endp = linep; 65 66 RB_FOREACH(ue, user_name_tree, env->sc_user_names) { 67 /* 68 * we convert the first nul back to a column, 69 * copy the string and then convert it back to a nul. 70 */ 71 ue->ue_line[strlen(ue->ue_line)] = ':'; 72 log_debug("pushing line: %s", ue->ue_line); 73 len = strlen(ue->ue_line) + 1; 74 memcpy(endp, ue->ue_line, len); 75 endp[strcspn(endp, ":")] = '\0'; 76 free(ue->ue_line); 77 ue->ue_line = endp; 78 endp += len; 79 80 /* 81 * To save memory strdup(3) the netid_line which originally used 82 * LINE_WIDTH bytes 83 */ 84 tmp = ue->ue_netid_line; 85 ue->ue_netid_line = strdup(tmp); 86 if (ue->ue_netid_line == NULL) { 87 fatal("out of memory"); 88 } 89 free(tmp); 90 } 91 env->sc_user_lines = linep; 92 log_debug("done pushing users"); 93 94 if ((linep = calloc(1, env->sc_group_line_len + 1)) == NULL) { 95 /* 96 * XXX: try allocating a smaller chunk of memory 97 */ 98 fatal("out of memory"); 99 } 100 endp = linep; 101 RB_FOREACH(ge, group_name_tree, env->sc_group_names) { 102 /* 103 * we convert the first nul back to a column, 104 * copy the string and then convert it back to a nul. 105 */ 106 ge->ge_line[strlen(ge->ge_line)] = ':'; 107 log_debug("pushing line: %s", ge->ge_line); 108 len = strlen(ge->ge_line) + 1; 109 memcpy(endp, ge->ge_line, len); 110 endp[strcspn(endp, ":")] = '\0'; 111 free(ge->ge_line); 112 ge->ge_line = endp; 113 endp += len; 114 } 115 env->sc_group_lines = linep; 116 log_debug("done pushing groups"); 117 } 118 119 int 120 userent_name_cmp(struct userent *ue1, struct userent *ue2) 121 { 122 return (strcmp(ue1->ue_line, ue2->ue_line)); 123 } 124 125 int 126 userent_uid_cmp(struct userent *ue1, struct userent *ue2) 127 { 128 return (ue1->ue_uid - ue2->ue_uid); 129 } 130 131 int 132 groupent_name_cmp(struct groupent *ge1, struct groupent *ge2) 133 { 134 return (strcmp(ge1->ge_line, ge2->ge_line)); 135 } 136 137 int 138 groupent_gid_cmp(struct groupent *ge1, struct groupent *ge2) 139 { 140 return (ge1->ge_gid - ge2->ge_gid); 141 } 142 143 RB_GENERATE(user_name_tree, userent, ue_name_node, userent_name_cmp); 144 RB_GENERATE(user_uid_tree, userent, ue_uid_node, userent_uid_cmp); 145 RB_GENERATE(group_name_tree, groupent, ge_name_node, groupent_name_cmp); 146 RB_GENERATE(group_gid_tree, groupent, ge_gid_node, groupent_gid_cmp); 147