1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* 27 * specials.c - knowledge of special services 28 * 29 * svc.startd(8) has duties that cannot be carried out without knowledge of the 30 * transition of various services, such as the milestones, to their online 31 * states. Hooks are called with the restarter instance's ri_lock held, so 32 * operations on all instances (or on the graph) should be performed 33 * asynchronously. 34 */ 35 36 #include <sys/statvfs.h> 37 #include <sys/types.h> 38 #include <assert.h> 39 #include <errno.h> 40 #include <libintl.h> 41 #include <limits.h> 42 #include <locale.h> 43 #include <pthread.h> 44 #include <signal.h> 45 #include <stdio.h> 46 #include <string.h> 47 #include <strings.h> 48 #include <time.h> 49 #include <zone.h> 50 51 #include "startd.h" 52 53 void 54 special_null_transition() 55 { 56 } 57 58 static void 59 special_fsroot_post_online() 60 { 61 static int once; 62 char *locale; 63 64 /* 65 * /usr, with timezone and locale data, is now available. 66 */ 67 if (!st->st_log_timezone_known) { 68 tzset(); 69 st->st_log_timezone_known = 1; 70 } 71 72 if (!st->st_log_locale_known) { 73 locale = st->st_locale; 74 75 (void) setlocale(LC_ALL, ""); 76 st->st_locale = setlocale(LC_MESSAGES, ""); 77 if (st->st_locale) { 78 st->st_locale = safe_strdup(st->st_locale); 79 xstr_sanitize(st->st_locale); 80 free(locale); 81 } else { 82 st->st_locale = locale; 83 } 84 85 (void) textdomain(TEXT_DOMAIN); 86 st->st_log_locale_known = 1; 87 } 88 89 if (once) 90 return; 91 92 /* 93 * ctime(3C) ends with '\n\0'. 94 */ 95 once++; 96 log_framework(LOG_INFO, "system start time was %s", 97 ctime(&st->st_start_time.tv_sec)); 98 } 99 100 static void 101 special_fsminimal_post_online(void) 102 { 103 ulong_t rfsid, fsid; 104 pid_t init_pid; 105 int ret; 106 107 log_framework(LOG_DEBUG, "special_fsminimal_post_online hook " 108 "executed\n"); 109 110 /* 111 * If /var is still read-only, and it is on a separate filesystem, then 112 * attempt to mount it read-write now. 113 */ 114 if ((ret = fs_is_read_only("/var", &fsid)) == 1) { 115 (void) fs_is_read_only("/", &rfsid); 116 117 if (rfsid != fsid) { 118 log_framework(LOG_WARNING, "/var filesystem " 119 "read-only after system/filesystem/minimal\n"); 120 if (fs_remount("/var")) 121 log_framework(LOG_WARNING, "/var " 122 "filesystem remount failed\n"); 123 } 124 } 125 126 if ((ret = fs_is_read_only("/var", &fsid)) != 1) { 127 if (ret != 0) 128 log_error(LOG_WARNING, gettext("couldn't check status " 129 "of /var filesystem: %s\n"), strerror(errno)); 130 131 /* 132 * Clear (dead) entries and record boot time. 133 */ 134 utmpx_clear_old(); 135 utmpx_write_boottime(); 136 137 /* 138 * Reinitialize the logs to point to LOG_PREFIX_NORMAL. 139 */ 140 log_init(); 141 142 /* 143 * Poke init so it will create /var/run/initpipe. 144 */ 145 if (zone_getattr(getzoneid(), ZONE_ATTR_INITPID, &init_pid, 146 sizeof (init_pid)) != sizeof (init_pid)) { 147 log_error(LOG_WARNING, "Could not get pid of init: " 148 "%s.\n", strerror(errno)); 149 } else { 150 if (kill(init_pid, SIGHUP) != 0) { 151 switch (errno) { 152 case EPERM: 153 case ESRCH: 154 log_error(LOG_WARNING, 155 "Could not signal init: %s.\n", 156 strerror(errno)); 157 break; 158 159 case EINVAL: 160 default: 161 bad_error("kill", errno); 162 } 163 } 164 } 165 } 166 167 if ((ret = fs_is_read_only("/etc/svc", &fsid)) != 1) { 168 if (ret != 0) 169 log_error(LOG_WARNING, gettext("couldn't check status " 170 "of /etc/svc filesystem: %s\n"), strerror(errno)); 171 172 /* 173 * Take pending snapshots and create a svc.startd instance. 174 */ 175 (void) startd_thread_create(restarter_post_fsminimal_thread, 176 NULL); 177 } 178 } 179 180 static void 181 special_single_post_online(void) 182 { 183 int r; 184 185 log_framework(LOG_DEBUG, "special_single_post_online hook executed\n"); 186 187 /* 188 * Un-set the special reconfig reboot property. 189 */ 190 r = libscf_set_reconfig(0); 191 switch (r) { 192 case 0: 193 case ENOENT: 194 break; 195 196 case EPERM: 197 case EACCES: 198 case EROFS: 199 log_error(LOG_WARNING, "Could not clear reconfiguration " 200 "property: %s.\n", strerror(r)); 201 break; 202 203 default: 204 bad_error("libscf_set_reconfig", r); 205 } 206 207 if (booting_to_single_user) 208 (void) startd_thread_create(single_user_thread, NULL); 209 } 210 211 static service_hook_assn_t special_svcs[] = { 212 { "svc:/system/filesystem/root:default", 213 special_null_transition, 214 special_fsroot_post_online, 215 special_null_transition }, 216 { "svc:/system/filesystem/minimal:default", 217 special_null_transition, 218 special_fsminimal_post_online, 219 special_null_transition }, 220 { "svc:/milestone/single-user:default", 221 special_null_transition, 222 special_single_post_online, 223 special_null_transition }, 224 }; 225 226 void 227 special_online_hooks_get(const char *fmri, instance_hook_t *pre_onp, 228 instance_hook_t *post_onp, instance_hook_t *post_offp) 229 { 230 int i; 231 232 for (i = 0; i < sizeof (special_svcs) / sizeof (service_hook_assn_t); 233 i++) 234 if (strcmp(fmri, special_svcs[i].sh_fmri) == 0) { 235 *pre_onp = special_svcs[i].sh_pre_online_hook; 236 *post_onp = special_svcs[i].sh_post_online_hook; 237 *post_offp = special_svcs[i].sh_post_offline_hook; 238 return; 239 } 240 241 *pre_onp = *post_onp = *post_offp = special_null_transition; 242 } 243