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 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <sys/stat.h> 27 #include <locale.h> 28 #include <unistd.h> 29 #include <stdlib.h> 30 #include <stdio.h> 31 32 #include "dconf.h" 33 #include "minfree.h" 34 #include "utils.h" 35 36 static const char USAGE[] = "\ 37 Usage: %s [-nuy] [-c kernel | curproc | all ] [-d dump-device | swap ]\n\ 38 [-m min {k|m|%%} ] [-s savecore-dir] [-r root-dir] [-z on|off]\n"; 39 40 static const char OPTS[] = "nuyc:d:m:s:r:z:"; 41 42 static const char PATH_DEVICE[] = "/dev/dump"; 43 static const char PATH_CONFIG[] = "/etc/dumpadm.conf"; 44 45 int 46 main(int argc, char *argv[]) 47 { 48 const char *pname = getpname(argv[0]); 49 50 u_longlong_t minf; 51 struct stat st; 52 int c; 53 int dflag = 0; /* for checking in use during -d ops */ 54 int dcmode = DC_CURRENT; /* kernel settings override unless -u */ 55 int modified = 0; /* have we modified the dump config? */ 56 char *minfstr = NULL; /* string value of -m argument */ 57 dumpconf_t dc; /* current configuration */ 58 59 (void) setlocale(LC_ALL, ""); 60 (void) textdomain(TEXT_DOMAIN); 61 62 /* 63 * Take an initial lap through argv hunting for -r root-dir, 64 * so that we can chroot before opening the configuration file. 65 * We also handle -u and any bad options at this point. 66 */ 67 while (optind < argc) { 68 while ((c = getopt(argc, argv, OPTS)) != (int)EOF) { 69 if (c == 'r' && chroot(optarg) == -1) 70 die(gettext("failed to chroot to %s"), optarg); 71 else if (c == 'u') 72 dcmode = DC_OVERRIDE; 73 else if (c == '?') { 74 (void) fprintf(stderr, gettext(USAGE), pname); 75 return (E_USAGE); 76 } 77 } 78 79 if (optind < argc) { 80 warn(gettext("illegal argument -- %s\n"), argv[optind]); 81 (void) fprintf(stderr, gettext(USAGE), pname); 82 return (E_USAGE); 83 } 84 } 85 86 if (geteuid() != 0) 87 die(gettext("you must be root to use %s\n"), pname); 88 89 /* 90 * If no config file exists yet, we're going to create an empty one, 91 * so set the modified flag to force writing out the file. 92 */ 93 if (access(PATH_CONFIG, F_OK) == -1) 94 modified++; 95 96 /* 97 * Now open and read in the initial values from the config file. 98 * If it doesn't exist, we create an empty file and dc is 99 * initialized with the default values. 100 */ 101 if (dconf_open(&dc, PATH_DEVICE, PATH_CONFIG, dcmode) == -1) 102 return (E_ERROR); 103 104 /* 105 * Take another lap through argv, processing options and 106 * modifying the dumpconf_t as appropriate. 107 */ 108 for (optind = 1; optind < argc; optind++) { 109 while ((c = getopt(argc, argv, OPTS)) != (int)EOF) { 110 switch (c) { 111 case 'c': 112 if (dconf_str2content(&dc, optarg) == -1) 113 return (E_USAGE); 114 modified++; 115 break; 116 case 'd': 117 if (dconf_str2device(&dc, optarg) == -1) 118 return (E_USAGE); 119 dflag++; 120 modified++; 121 break; 122 123 case 'm': 124 minfstr = optarg; 125 break; 126 127 case 'n': 128 dc.dc_enable = DC_OFF; 129 modified++; 130 break; 131 132 case 's': 133 if (stat(optarg, &st) == -1 || 134 !S_ISDIR(st.st_mode)) { 135 warn(gettext("%s is missing or not a " 136 "directory\n"), optarg); 137 return (E_USAGE); 138 } 139 140 if (dconf_str2savdir(&dc, optarg) == -1) 141 return (E_USAGE); 142 modified++; 143 break; 144 145 case 'y': 146 dc.dc_enable = DC_ON; 147 modified++; 148 break; 149 150 case 'z': 151 if (dconf_str2csave(&dc, optarg) == -1) 152 return (E_USAGE); 153 modified++; 154 break; 155 } 156 } 157 } 158 159 if (minfstr != NULL) { 160 if (minfree_compute(dc.dc_savdir, minfstr, &minf) == -1) 161 return (E_USAGE); 162 if (minfree_write(dc.dc_savdir, minf) == -1) 163 return (E_ERROR); 164 } 165 166 if (dcmode == DC_OVERRIDE) { 167 /* 168 * In override mode, we try to force an update. If this 169 * fails, we re-load the kernel configuration and write that 170 * out to the file in order to force the file in sync. 171 * 172 * We allow the file to be read-only but print a warning to the 173 * user that indicates it hasn't been updated. 174 */ 175 if (dconf_update(&dc, 0) == -1) 176 (void) dconf_getdev(&dc); 177 if (dc.dc_readonly) 178 warn(gettext("kernel settings updated, but " 179 "%s is read-only\n"), PATH_CONFIG); 180 else if (dconf_write(&dc) == -1) 181 return (E_ERROR); 182 183 } else if (modified) { 184 /* 185 * If we're modifying the configuration, then try 186 * to update it, and write out the file if successful. 187 */ 188 if (dc.dc_readonly) { 189 warn(gettext("failed to update settings: %s is " 190 "read-only\n"), PATH_CONFIG); 191 return (E_ERROR); 192 } 193 194 if (dconf_update(&dc, dflag) == -1 || 195 dconf_write(&dc) == -1) 196 return (E_ERROR); 197 } 198 199 if (dcmode == DC_CURRENT) 200 dconf_print(&dc, stdout); 201 202 if (dconf_close(&dc) == -1) 203 warn(gettext("failed to close configuration file")); 204 205 return (E_SUCCESS); 206 } 207