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 (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright 2015 Nexenta Systems, Inc. All rights reserved. 24 */ 25 26 #include <sys/stat.h> 27 #include <locale.h> 28 #include <unistd.h> 29 #include <stdlib.h> 30 #include <stdio.h> 31 #include <string.h> 32 33 #include "dconf.h" 34 #include "minfree.h" 35 #include "utils.h" 36 37 static const char USAGE[] = "\ 38 Usage: %s [-enuy] [-c kernel | curproc | all ] [-d dump-device | swap ]\n\ 39 [-m min {k|m|%%} ] [-s savecore-dir] [-r root-dir] [-z on|off]\n"; 40 41 static const char OPTS[] = "einuyc:d:m:s:r:z:"; 42 43 static const char PATH_DEVICE[] = "/dev/dump"; 44 static const char PATH_CONFIG[] = "/etc/dumpadm.conf"; 45 46 int 47 main(int argc, char *argv[]) 48 { 49 const char *pname = getpname(argv[0]); 50 51 u_longlong_t minf; 52 struct stat st; 53 int c; 54 int dflag = 0; /* for checking in use during -d ops */ 55 int eflag = 0; /* print estimated dump size */ 56 int dcmode = DC_CURRENT; /* kernel settings override unless -u */ 57 int modified = 0; /* have we modified the dump config? */ 58 char *minfstr = NULL; /* string value of -m argument */ 59 dumpconf_t dc; /* current configuration */ 60 int chrooted = 0; 61 int douuid = 0; 62 63 (void) setlocale(LC_ALL, ""); 64 (void) textdomain(TEXT_DOMAIN); 65 66 /* 67 * Take an initial lap through argv hunting for -r root-dir, 68 * so that we can chroot before opening the configuration file. 69 * We also handle -u and any bad options at this point. 70 */ 71 while (optind < argc) { 72 while ((c = getopt(argc, argv, OPTS)) != (int)EOF) { 73 if (c == 'r' && ++chrooted && chroot(optarg) == -1) 74 die(gettext("failed to chroot to %s"), optarg); 75 else if (c == 'u') 76 dcmode = DC_OVERRIDE; 77 else if (c == '?') { 78 (void) fprintf(stderr, gettext(USAGE), pname); 79 return (E_USAGE); 80 } 81 } 82 83 if (optind < argc) { 84 warn(gettext("illegal argument -- %s\n"), argv[optind]); 85 (void) fprintf(stderr, gettext(USAGE), pname); 86 return (E_USAGE); 87 } 88 } 89 90 if (geteuid() != 0) 91 die(gettext("you must be root to use %s\n"), pname); 92 93 /* 94 * If no config file exists yet, we're going to create an empty one, 95 * so set the modified flag to force writing out the file. 96 */ 97 if (access(PATH_CONFIG, F_OK) == -1) 98 modified++; 99 100 /* 101 * Now open and read in the initial values from the config file. 102 * If it doesn't exist, we create an empty file and dc is 103 * initialized with the default values. 104 */ 105 if (dconf_open(&dc, PATH_DEVICE, PATH_CONFIG, dcmode) == -1) 106 return (E_ERROR); 107 108 /* 109 * Take another lap through argv, processing options and 110 * modifying the dumpconf_t as appropriate. 111 */ 112 for (optind = 1; optind < argc; optind++) { 113 while ((c = getopt(argc, argv, OPTS)) != (int)EOF) { 114 switch (c) { 115 case 'c': 116 if (dconf_str2content(&dc, optarg) == -1) 117 return (E_USAGE); 118 modified++; 119 break; 120 case 'd': 121 if (dconf_str2device(&dc, optarg) == -1) 122 return (E_USAGE); 123 dflag++; 124 modified++; 125 break; 126 case 'e': 127 eflag++; 128 break; 129 case 'i': 130 /* undocumented option */ 131 if (chrooted) { 132 warn(gettext("-i and -r cannot be " 133 "used together\n")); 134 return (E_USAGE); 135 } 136 douuid++; 137 break; 138 139 case 'm': 140 minfstr = optarg; 141 break; 142 143 case 'n': 144 dc.dc_enable = DC_OFF; 145 modified++; 146 break; 147 148 case 's': 149 if (stat(optarg, &st) == -1 || 150 !S_ISDIR(st.st_mode)) { 151 warn(gettext("%s is missing or not a " 152 "directory\n"), optarg); 153 return (E_USAGE); 154 } 155 156 if (dconf_str2savdir(&dc, optarg) == -1) 157 return (E_USAGE); 158 modified++; 159 break; 160 161 case 'y': 162 dc.dc_enable = DC_ON; 163 modified++; 164 break; 165 166 case 'z': 167 if (dconf_str2csave(&dc, optarg) == -1) 168 return (E_USAGE); 169 modified++; 170 break; 171 } 172 } 173 } 174 175 if (eflag) { 176 if (argc == 2 && argv[1][0] == '-' && argv[1][1] == 'e' && 177 !argv[1][2]) 178 return (dconf_get_dumpsize(&dc) ? E_SUCCESS : E_ERROR); 179 else 180 die(gettext("-e cannot be used with other options\n")); 181 } 182 183 if (douuid) 184 return (dconf_write_uuid(&dc) ? E_SUCCESS : E_ERROR); 185 186 if (minfstr != NULL) { 187 if (minfree_compute(dc.dc_savdir, minfstr, &minf) == -1) 188 return (E_USAGE); 189 if (minfree_write(dc.dc_savdir, minf) == -1) 190 return (E_ERROR); 191 } 192 193 if (dcmode == DC_OVERRIDE) { 194 /* 195 * In override mode, we try to force an update. If this 196 * fails, we re-load the kernel configuration and write that 197 * out to the file in order to force the file in sync. 198 * 199 * We allow the file to be read-only but print a warning to the 200 * user that indicates it hasn't been updated. 201 */ 202 if (dconf_update(&dc, 0) == -1) 203 (void) dconf_getdev(&dc); 204 if (dc.dc_readonly) 205 warn(gettext("kernel settings updated, but " 206 "%s is read-only\n"), PATH_CONFIG); 207 else if (dconf_write(&dc) == -1) 208 return (E_ERROR); 209 210 } else if (modified) { 211 /* 212 * If we're modifying the configuration, then try 213 * to update it, and write out the file if successful. 214 */ 215 if (dc.dc_readonly) { 216 warn(gettext("failed to update settings: %s is " 217 "read-only\n"), PATH_CONFIG); 218 return (E_ERROR); 219 } 220 221 if (dconf_update(&dc, dflag) == -1 || 222 dconf_write(&dc) == -1) 223 return (E_ERROR); 224 } 225 226 if (dcmode == DC_CURRENT) 227 dconf_print(&dc, stdout); 228 229 if (dconf_close(&dc) == -1) 230 warn(gettext("failed to close configuration file")); 231 232 return (E_SUCCESS); 233 } 234