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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * devfree key [device [...]] 32 */ 33 34 #include <sys/types.h> 35 #include <sys/param.h> 36 #include <stdio.h> 37 #include <errno.h> 38 #include <stdlib.h> 39 #include <string.h> 40 #include <fmtmsg.h> 41 #include <devmgmt.h> 42 #include <values.h> 43 #include <devtab.h> 44 45 46 /* 47 * Local definitions 48 * TRUE Boolean TRUE value 49 * FALSE Boolean FALSE value 50 */ 51 #ifndef TRUE 52 #define TRUE ('t') 53 #endif 54 55 #ifndef FALSE 56 #define FALSE 0 57 #endif 58 59 60 /* 61 * Exit codes: 62 * EX_OK Exit code for all went well 63 * EX_ERROR Exit code for something failed 64 * EX_TBLERR Exit code for errors relating to device or lock tables 65 * EX_NOFREE Exit code for free failed 66 */ 67 68 #define EX_OK 0 69 #define EX_ERROR 1 70 #define EX_TBLERR 2 71 #define EX_NOFREE 3 72 73 74 /* 75 * Messages 76 * M_USAGE Usage error 77 * M_INVKEY Invalid key specified 78 * M_NOTRSVD Attempting to free something not alloc'd 79 * M_NOTONKEY Attempting to free with wrong key 80 * M_DEVTAB Error opening the device table 81 * M_RSVTAB Error opening the device-reservation table 82 * M_ERROR Some internal error 83 */ 84 85 #define M_USAGE "usage: devfree key [device [...]]" 86 #define M_INVKEY "Invalid key: %s" 87 #define M_NOTRSVD "Device not reserved: %s" 88 #define M_NOTONKEY "Cannot unreserve device: %s" 89 #define M_DEVTAB "Cannot open the device table: %s" 90 #define M_RSVTAB "Cannot open the device-reservation table: %s" 91 #define M_ERROR "Internal error, errno=%d" 92 93 94 /* 95 * Local functions and static data 96 * stdmsg(r,l,s,m) Macro for standard message generation 97 * r MM_NRECOV or MM_RECOV (recoverability) 98 * l Label 99 * s Severity 100 * m Message 101 * lbl Buffer for the label-component of a message. 102 * msg Buffer for the text-component of a message. 103 */ 104 105 #define stdmsg(r,l,s,m) (void) fmtmsg(MM_PRINT|MM_UTIL|r,l,s,m,MM_NULLACT,MM_NULLTAG) 106 107 static char lbl[MM_MXLABELLN+1]; 108 static char msg[MM_MXTXTLN+1]; 109 110 /* 111 * devfree key [device [device [...]]] 112 * 113 * This command frees devices that have been reserved using 114 * the devreserv command (or the devreserv() function). 115 * 116 * Options: None 117 * 118 * Arguments: 119 * key The key on which the device to free was allocated on. 120 * If omitted, all keys are assumed. 121 * device The device to free. If omitted, all devices allocated 122 * using the key are freed. 123 * 124 * Command Values: 125 * EX_OK 0 Device(s) successfully freed 126 * EX_ERROR 1 A syntax error or other error occurred 127 * EX_TBLERR 2 A problem with device management tables 128 * EX_NOFREE 3 A requested device couldn't be freed 129 */ 130 131 int 132 main(int argc, char *argv[]) 133 { 134 /* Automatics */ 135 char **argp; /* Ptr to current argument */ 136 struct reservdev **rsvd; /* Ptr to list of locks */ 137 struct reservdev **plk; /* Running ptr to locks */ 138 char *devtab; /* Ptr to device table name */ 139 char *rsvtab; /* Ptr to dev-rsv-tbl name */ 140 char *p; /* Temp char pointer */ 141 int argcount; /* Number of args on cmd */ 142 long lkey; /* Key for locking (long) */ 143 int key; /* Key for locking */ 144 int halt; /* TRUE if we need to stop */ 145 int sev; /* Message severity */ 146 int exitcode; /* Value of command */ 147 int syntaxerr; /* Flag, TRUE if syntax error */ 148 int exitcd; /* Value for exit() */ 149 int c; /* Option character */ 150 151 152 /* 153 * Initializations 154 */ 155 156 /* Build a message label */ 157 if (p = strrchr(argv[0], '/')) p++; 158 else p = argv[0]; 159 (void) strlcat(strcpy(lbl, "UX:"), p, sizeof(lbl)); 160 161 /* Make only the text component of messages appear (remove this in SVR4.1) */ 162 (void) putenv("MSGVERB=text"); 163 164 165 /* 166 * Parse the options from the command line 167 */ 168 169 opterr = 0; 170 syntaxerr = FALSE; 171 while ((c = getopt(argc, argv, "")) != EOF) switch(c) { 172 default: 173 syntaxerr = FALSE; 174 break; 175 } 176 177 178 /* Argument initializations */ 179 argp = &argv[optind]; 180 if ((argcount = argc-optind) < 1) syntaxerr = TRUE; 181 182 183 /* If there's (an obvious) syntax error, write a message and quit */ 184 if (syntaxerr) { 185 stdmsg(MM_NRECOV, lbl, MM_ERROR, M_USAGE); 186 exit(EX_ERROR); 187 } 188 189 190 /* 191 * devfree key 192 * 193 * Free all devices that have been reserved using the key "key". 194 */ 195 196 if (argcount == 1) { 197 198 /* Extract the key from the command */ 199 lkey = strtol(*argp, &p, 10); 200 if (*p || (lkey <= 0) || (lkey > MAXINT)) { 201 (void) snprintf(msg, sizeof (msg), M_INVKEY, *argp); 202 stdmsg(MM_NRECOV, lbl, MM_ERROR, msg); 203 exit(EX_ERROR); 204 } 205 key = (int) lkey; 206 207 /* Get the list of devices currently reserved */ 208 if (rsvd = reservdev()) { 209 exitcd = EX_OK; 210 for (plk = rsvd ; *plk ; plk++) { 211 if ((*plk)->key == key) 212 if (devfree(key, (*plk)->devname) != 0) 213 exitcd = EX_NOFREE; 214 } 215 } else { 216 if (((errno == ENOENT) || (errno == EACCES)) && (rsvtab = _rsvtabpath())) { 217 (void) snprintf(msg, sizeof(msg), M_RSVTAB, rsvtab); 218 exitcd = EX_TBLERR; 219 sev = MM_ERROR; 220 } else { 221 (void) snprintf(msg, sizeof (msg), M_ERROR, errno); 222 exitcd = EX_ERROR; 223 sev = MM_HALT; 224 } 225 stdmsg(MM_NRECOV, lbl, sev, msg); 226 } 227 228 /* Done */ 229 exit(exitcd); 230 } 231 232 233 /* 234 * devfree key device [...] 235 * 236 * Free specific devices 237 */ 238 239 /* Open the device file (if there's one to be opened) */ 240 if (!_opendevtab("r")) { 241 if (devtab = _devtabpath()) { 242 (void) snprintf(msg, sizeof(msg), M_DEVTAB, devtab); 243 exitcd = EX_TBLERR; 244 sev = MM_ERROR; 245 } else { 246 (void) snprintf(msg, sizeof (msg), M_ERROR, errno); 247 exitcd = EX_ERROR; 248 sev = MM_HALT; 249 } 250 stdmsg(MM_NRECOV, lbl, sev, msg); 251 exit(exitcd); 252 } 253 254 /* Extract the key from the command */ 255 lkey = strtol(*argp, &p, 10); 256 if (*p || (lkey <= 0) || (lkey > MAXINT)) { 257 (void) snprintf(msg, sizeof(msg), M_INVKEY, *argp); 258 stdmsg(MM_NRECOV, lbl, MM_ERROR, msg); 259 exit(EX_ERROR); 260 } 261 key = (int) lkey; 262 argp++; 263 264 /* Loop through the list of devices to free */ 265 exitcode = EX_OK; 266 halt = FALSE; 267 while (!halt && *argp) { 268 269 /* Try to free the device */ 270 if (devfree(key, *argp) != 0) { 271 if ((errno == EACCES) || (errno == ENOENT)) { 272 273 /* Can't get at reservation file */ 274 if (rsvtab = _rsvtabpath()) { 275 exitcode = EX_TBLERR; 276 (void) snprintf(msg, sizeof(msg), M_RSVTAB, rsvtab); 277 sev = MM_ERROR; 278 } 279 else { 280 exitcode = EX_ERROR; 281 (void) snprintf(msg, sizeof (msg), M_ERROR, errno); 282 sev = MM_HALT; 283 } 284 stdmsg(MM_NRECOV, lbl, sev, msg); 285 halt = TRUE; 286 } 287 else if (errno == EPERM) { 288 289 /* Wrong key */ 290 (void) snprintf(msg, sizeof(msg), M_NOTONKEY, *argp); 291 stdmsg(MM_NRECOV, lbl, MM_ERROR, msg); 292 exitcode = EX_NOFREE; 293 } 294 else if (errno == EINVAL) { 295 296 /* Device not reserved */ 297 (void) snprintf(msg, sizeof(msg), M_NOTRSVD, *argp); 298 stdmsg(MM_NRECOV, lbl, MM_ERROR, msg); 299 exitcode = EX_NOFREE; 300 } 301 302 else { 303 304 /* Some other strange error occurred */ 305 (void) snprintf(msg, sizeof (msg), M_ERROR, errno); 306 stdmsg(MM_NRECOV, lbl, MM_HALT, msg); 307 exitcode = EX_ERROR; 308 halt = TRUE; 309 } 310 } 311 argp++; 312 } 313 314 315 /* Exit with the appropriate code */ 316 return(exitcode); 317 } 318