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