| 1 | /* |
| 2 | * Copyright (c) 1980, 1986, 1989 The Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | #ifndef lint |
| 35 | char copyright[] = |
| 36 | "@(#) Copyright (c) 1980, 1986, 1989 The Regents of the University of California.\n\ |
| 37 | All rights reserved.\n"; |
| 38 | #endif /* not lint */ |
| 39 | |
| 40 | #ifndef lint |
| 41 | static char sccsid[] = "@(#)savecore.c 5.26 (Berkeley) 4/8/91"; |
| 42 | #endif /* not lint */ |
| 43 | |
| 44 | #include <sys/param.h> |
| 45 | #include <sys/mount.h> |
| 46 | #include <sys/stat.h> |
| 47 | #include <sys/time.h> |
| 48 | #include <sys/file.h> |
| 49 | #include <sys/syslog.h> |
| 50 | #include <dirent.h> |
| 51 | #include <stdio.h> |
| 52 | #include <nlist.h> |
| 53 | #include <paths.h> |
| 54 | |
| 55 | #define DAY (60L*60L*24L) |
| 56 | #define LEEWAY (3*DAY) |
| 57 | |
| 58 | #define eq(a,b) (!strcmp(a,b)) |
| 59 | #ifdef vax |
| 60 | #define ok(number) ((number)&0x7fffffff) |
| 61 | #else |
| 62 | #ifdef tahoe |
| 63 | #define ok(number) ((number)&~0xc0000000) |
| 64 | #else |
| 65 | #ifdef i386 |
| 66 | #define ok(number) ((number)&~0xfe000000) |
| 67 | #else |
| 68 | #define ok(number) (number) |
| 69 | #endif |
| 70 | #endif |
| 71 | #endif |
| 72 | |
| 73 | struct nlist current_nl[] = { /* namelist for currently running system */ |
| 74 | #define X_DUMPDEV 0 |
| 75 | { "_dumpdev" }, |
| 76 | #define X_DUMPLO 1 |
| 77 | { "_dumplo" }, |
| 78 | #define X_TIME 2 |
| 79 | { "_time" }, |
| 80 | #define X_DUMPSIZE 3 |
| 81 | { "_dumpsize" }, |
| 82 | #define X_VERSION 4 |
| 83 | { "_version" }, |
| 84 | #define X_PANICSTR 5 |
| 85 | { "_panicstr" }, |
| 86 | #define X_DUMPMAG 6 |
| 87 | { "_dumpmag" }, |
| 88 | { "" }, |
| 89 | }; |
| 90 | |
| 91 | struct nlist dump_nl[] = { /* name list for dumped system */ |
| 92 | { "_dumpdev" }, /* entries MUST be the same as */ |
| 93 | { "_dumplo" }, /* those in current_nl[] */ |
| 94 | { "_time" }, |
| 95 | { "_dumpsize" }, |
| 96 | { "_version" }, |
| 97 | { "_panicstr" }, |
| 98 | { "_dumpmag" }, |
| 99 | { "" }, |
| 100 | }; |
| 101 | |
| 102 | char *system; |
| 103 | char *dirname; /* directory to save dumps in */ |
| 104 | char *ddname; /* name of dump device */ |
| 105 | int dumpfd; /* read/write descriptor on block dev */ |
| 106 | char *find_dev(); |
| 107 | dev_t dumpdev; /* dump device */ |
| 108 | time_t dumptime; /* time the dump was taken */ |
| 109 | int dumplo; /* where dump starts on dumpdev */ |
| 110 | int dumpsize; /* amount of memory dumped */ |
| 111 | int dumpmag; /* magic number in dump */ |
| 112 | time_t now; /* current date */ |
| 113 | char *path(); |
| 114 | char *malloc(); |
| 115 | char *ctime(); |
| 116 | char vers[80]; |
| 117 | char core_vers[80]; |
| 118 | char panic_mesg[80]; |
| 119 | int panicstr; |
| 120 | off_t lseek(); |
| 121 | off_t Lseek(); |
| 122 | int verbose; |
| 123 | int force; |
| 124 | int clear; |
| 125 | extern int errno; |
| 126 | |
| 127 | main(argc, argv) |
| 128 | char **argv; |
| 129 | int argc; |
| 130 | { |
| 131 | extern char *optarg; |
| 132 | extern int optind; |
| 133 | int ch; |
| 134 | char *cp; |
| 135 | |
| 136 | while ((ch = getopt(argc, argv, "cdfv")) != EOF) |
| 137 | switch(ch) { |
| 138 | case 'c': |
| 139 | clear = 1; |
| 140 | break; |
| 141 | case 'd': /* not documented */ |
| 142 | case 'v': |
| 143 | verbose = 1; |
| 144 | break; |
| 145 | case 'f': |
| 146 | force = 1; |
| 147 | break; |
| 148 | case '?': |
| 149 | default: |
| 150 | usage(); |
| 151 | } |
| 152 | argc -= optind; |
| 153 | argv += optind; |
| 154 | |
| 155 | /* This is wrong, but I want "savecore -c" to work. */ |
| 156 | if (!clear) { |
| 157 | if (argc != 1 && argc != 2) |
| 158 | usage(); |
| 159 | dirname = argv[0]; |
| 160 | } |
| 161 | if (argc == 2) |
| 162 | system = argv[1]; |
| 163 | |
| 164 | openlog("savecore", LOG_ODELAY, LOG_AUTH); |
| 165 | |
| 166 | read_kmem(); |
| 167 | if (!dump_exists()) { |
| 168 | /* (void)fprintf(stderr, "savecore: no core dump\n");*/ |
| 169 | if (!force) |
| 170 | exit(0); |
| 171 | } |
| 172 | if (clear) { |
| 173 | clear_dump(); |
| 174 | exit(0); |
| 175 | } |
| 176 | (void) time(&now); |
| 177 | check_kmem(); |
| 178 | if (panicstr) |
| 179 | log(LOG_CRIT, "reboot after panic: %s\n", panic_mesg); |
| 180 | else |
| 181 | syslog(LOG_CRIT, "reboot\n"); |
| 182 | |
| 183 | if (access(dirname, W_OK) < 0) { |
| 184 | Perror(LOG_ERR, "%s: %m\n", dirname); |
| 185 | exit(1); |
| 186 | } |
| 187 | if ((!get_crashtime() || !check_space()) && !force) |
| 188 | exit(1); |
| 189 | save_core(); |
| 190 | clear_dump(); |
| 191 | exit(0); |
| 192 | } |
| 193 | |
| 194 | dump_exists() |
| 195 | { |
| 196 | int word; |
| 197 | |
| 198 | Lseek(dumpfd, (off_t)(dumplo + ok(dump_nl[X_DUMPMAG].n_value)), L_SET); |
| 199 | Read(dumpfd, (char *)&word, sizeof (word)); |
| 200 | if (verbose && word != dumpmag) |
| 201 | printf("magic number mismatch: %x != %x\n", word, dumpmag); |
| 202 | return (word == dumpmag); |
| 203 | } |
| 204 | |
| 205 | clear_dump() |
| 206 | { |
| 207 | int zero = 0; |
| 208 | |
| 209 | Lseek(dumpfd, (off_t)(dumplo + ok(dump_nl[X_DUMPMAG].n_value)), L_SET); |
| 210 | Write(dumpfd, (char *)&zero, sizeof (zero)); |
| 211 | } |
| 212 | |
| 213 | char * |
| 214 | find_dev(dev, type) |
| 215 | register dev_t dev; |
| 216 | register int type; |
| 217 | { |
| 218 | register DIR *dfd = opendir(_PATH_DEV); |
| 219 | struct dirent *dir; |
| 220 | struct stat statb; |
| 221 | static char devname[MAXPATHLEN + 1]; |
| 222 | char *dp; |
| 223 | |
| 224 | strcpy(devname, _PATH_DEV); |
| 225 | while ((dir = readdir(dfd))) { |
| 226 | strcpy(devname + sizeof(_PATH_DEV) - 1, dir->d_name); |
| 227 | if (stat(devname, &statb)) { |
| 228 | perror(devname); |
| 229 | continue; |
| 230 | } |
| 231 | if ((statb.st_mode&S_IFMT) != type) |
| 232 | continue; |
| 233 | if (dev == statb.st_rdev) { |
| 234 | closedir(dfd); |
| 235 | dp = malloc(strlen(devname)+1); |
| 236 | strcpy(dp, devname); |
| 237 | return (dp); |
| 238 | } |
| 239 | } |
| 240 | closedir(dfd); |
| 241 | log(LOG_ERR, "Can't find device %d/%d\n", major(dev), minor(dev)); |
| 242 | exit(1); |
| 243 | /*NOTREACHED*/ |
| 244 | } |
| 245 | |
| 246 | char * |
| 247 | rawname(s) |
| 248 | char *s; |
| 249 | { |
| 250 | static char name[MAXPATHLEN]; |
| 251 | char *sl, *rindex(); |
| 252 | |
| 253 | if ((sl = rindex(s, '/')) == NULL || sl[1] == '0') { |
| 254 | log(LOG_ERR, "can't make raw dump device name from %s?\n", s); |
| 255 | return (s); |
| 256 | } |
| 257 | sprintf(name, "%.*s/r%s", sl - s, s, sl + 1); |
| 258 | return (name); |
| 259 | } |
| 260 | |
| 261 | int cursyms[] = |
| 262 | { X_DUMPDEV, X_DUMPLO, X_VERSION, X_DUMPMAG, -1 }; |
| 263 | int dumpsyms[] = |
| 264 | { X_TIME, X_DUMPSIZE, X_VERSION, X_PANICSTR, X_DUMPMAG, -1 }; |
| 265 | read_kmem() |
| 266 | { |
| 267 | register char *cp; |
| 268 | FILE *fp; |
| 269 | char *dump_sys; |
| 270 | int kmem, i; |
| 271 | |
| 272 | dump_sys = system ? system : _PATH_UNIX; |
| 273 | nlist(_PATH_UNIX, current_nl); |
| 274 | nlist(dump_sys, dump_nl); |
| 275 | /* |
| 276 | * Some names we need for the currently running system, |
| 277 | * others for the system that was running when the dump was made. |
| 278 | * The values obtained from the current system are used |
| 279 | * to look for things in /dev/kmem that cannot be found |
| 280 | * in the dump_sys namelist, but are presumed to be the same |
| 281 | * (since the disk partitions are probably the same!) |
| 282 | */ |
| 283 | for (i = 0; cursyms[i] != -1; i++) |
| 284 | if (current_nl[cursyms[i]].n_value == 0) { |
| 285 | log(LOG_ERR, "%s: %s not in namelist\n", _PATH_UNIX, |
| 286 | current_nl[cursyms[i]].n_name); |
| 287 | exit(1); |
| 288 | } |
| 289 | for (i = 0; dumpsyms[i] != -1; i++) |
| 290 | if (dump_nl[dumpsyms[i]].n_value == 0) { |
| 291 | log(LOG_ERR, "%s: %s not in namelist\n", dump_sys, |
| 292 | dump_nl[dumpsyms[i]].n_name); |
| 293 | exit(1); |
| 294 | } |
| 295 | kmem = Open(_PATH_KMEM, O_RDONLY); |
| 296 | Lseek(kmem, (long)current_nl[X_DUMPDEV].n_value, L_SET); |
| 297 | Read(kmem, (char *)&dumpdev, sizeof (dumpdev)); |
| 298 | Lseek(kmem, (long)current_nl[X_DUMPLO].n_value, L_SET); |
| 299 | Read(kmem, (char *)&dumplo, sizeof (dumplo)); |
| 300 | if (verbose) |
| 301 | printf("dumplo = %d (%d * %d)\n", dumplo, dumplo/DEV_BSIZE, |
| 302 | DEV_BSIZE); |
| 303 | Lseek(kmem, (long)current_nl[X_DUMPMAG].n_value, L_SET); |
| 304 | Read(kmem, (char *)&dumpmag, sizeof (dumpmag)); |
| 305 | dumplo *= DEV_BSIZE; |
| 306 | ddname = find_dev(dumpdev, S_IFBLK); |
| 307 | dumpfd = Open(ddname, O_RDWR); |
| 308 | fp = fdopen(kmem, "r"); |
| 309 | if (fp == NULL) { |
| 310 | log(LOG_ERR, "Couldn't fdopen kmem\n"); |
| 311 | exit(1); |
| 312 | } |
| 313 | if (system) |
| 314 | return; |
| 315 | fseek(fp, (long)current_nl[X_VERSION].n_value, L_SET); |
| 316 | fgets(vers, sizeof (vers), fp); |
| 317 | fclose(fp); |
| 318 | } |
| 319 | |
| 320 | check_kmem() |
| 321 | { |
| 322 | FILE *fp; |
| 323 | register char *cp; |
| 324 | |
| 325 | fp = fdopen(dumpfd, "r"); |
| 326 | if (fp == NULL) { |
| 327 | log(LOG_ERR, "Can't fdopen dumpfd\n"); |
| 328 | exit(1); |
| 329 | } |
| 330 | |
| 331 | fseek(fp, (off_t)(dumplo+ok(dump_nl[X_VERSION].n_value)), L_SET); |
| 332 | fgets(core_vers, sizeof (core_vers), fp); |
| 333 | if (!eq(vers, core_vers) && system == 0) { |
| 334 | log(LOG_WARNING, "Warning: %s version mismatch:\n", _PATH_UNIX); |
| 335 | log(LOG_WARNING, "\t%s\n", vers); |
| 336 | log(LOG_WARNING, "and\t%s\n", core_vers); |
| 337 | } |
| 338 | |
| 339 | fseek(fp, (off_t)(dumplo + ok(dump_nl[X_PANICSTR].n_value)), L_SET); |
| 340 | fread((char *)&panicstr, sizeof (panicstr), 1, fp); |
| 341 | if (panicstr) { |
| 342 | fseek(fp, dumplo + ok(panicstr), L_SET); |
| 343 | cp = panic_mesg; |
| 344 | do |
| 345 | *cp = getc(fp); |
| 346 | while (*cp++ && cp < &panic_mesg[sizeof(panic_mesg)]); |
| 347 | } |
| 348 | /* don't fclose(fp); we want the file descriptor */ |
| 349 | } |
| 350 | |
| 351 | get_crashtime() |
| 352 | { |
| 353 | time_t clobber = (time_t)0; |
| 354 | |
| 355 | Lseek(dumpfd, (off_t)(dumplo + ok(dump_nl[X_TIME].n_value)), L_SET); |
| 356 | Read(dumpfd, (char *)&dumptime, sizeof dumptime); |
| 357 | if (dumptime == 0) { |
| 358 | if (verbose) |
| 359 | printf("Dump time is zero.\n"); |
| 360 | return (0); |
| 361 | } |
| 362 | printf("System went down at %s", ctime(&dumptime)); |
| 363 | if (dumptime < now - LEEWAY || dumptime > now + LEEWAY) { |
| 364 | printf("dump time is unreasonable\n"); |
| 365 | return (0); |
| 366 | } |
| 367 | return (1); |
| 368 | } |
| 369 | |
| 370 | char * |
| 371 | path(file) |
| 372 | char *file; |
| 373 | { |
| 374 | register char *cp = malloc(strlen(file) + strlen(dirname) + 2); |
| 375 | |
| 376 | (void) strcpy(cp, dirname); |
| 377 | (void) strcat(cp, "/"); |
| 378 | (void) strcat(cp, file); |
| 379 | return (cp); |
| 380 | } |
| 381 | |
| 382 | check_space() |
| 383 | { |
| 384 | long minfree, spacefree; |
| 385 | struct statfs fsbuf; |
| 386 | |
| 387 | if (statfs(dirname, &fsbuf) < 0) { |
| 388 | Perror(LOG_ERR, "%s: %m\n", dirname); |
| 389 | exit(1); |
| 390 | } |
| 391 | spacefree = fsbuf.f_bavail * fsbuf.f_fsize / 1024; |
| 392 | minfree = read_number("minfree"); |
| 393 | if (minfree > 0 && spacefree - dumpsize < minfree) { |
| 394 | log(LOG_WARNING, "Dump omitted, not enough space on device\n"); |
| 395 | return (0); |
| 396 | } |
| 397 | if (spacefree - dumpsize < minfree) |
| 398 | log(LOG_WARNING, |
| 399 | "Dump performed, but free space threshold crossed\n"); |
| 400 | return (1); |
| 401 | } |
| 402 | |
| 403 | read_number(fn) |
| 404 | char *fn; |
| 405 | { |
| 406 | char lin[80]; |
| 407 | register FILE *fp; |
| 408 | |
| 409 | fp = fopen(path(fn), "r"); |
| 410 | if (fp == NULL) |
| 411 | return (0); |
| 412 | if (fgets(lin, 80, fp) == NULL) { |
| 413 | fclose(fp); |
| 414 | return (0); |
| 415 | } |
| 416 | fclose(fp); |
| 417 | return (atoi(lin)); |
| 418 | } |
| 419 | |
| 420 | /*#define BUFSIZE (256*1024) /* 1/4 Mb */ |
| 421 | #define BUFSIZE (8*1024) |
| 422 | |
| 423 | save_core() |
| 424 | { |
| 425 | register int n; |
| 426 | register char *cp; |
| 427 | register int ifd, ofd, bounds; |
| 428 | int ret; |
| 429 | char *bfile; |
| 430 | register FILE *fp; |
| 431 | |
| 432 | cp = malloc(BUFSIZE); |
| 433 | if (cp == 0) { |
| 434 | log(LOG_ERR, "savecore: Can't allocate i/o buffer.\n"); |
| 435 | return; |
| 436 | } |
| 437 | bounds = read_number("bounds"); |
| 438 | ifd = Open(system ? system : _PATH_UNIX, O_RDONLY); |
| 439 | (void)sprintf(cp, "system.%d", bounds); |
| 440 | ofd = Create(path(cp), 0644); |
| 441 | while((n = Read(ifd, cp, BUFSIZE)) > 0) |
| 442 | Write(ofd, cp, n); |
| 443 | close(ifd); |
| 444 | close(ofd); |
| 445 | if ((ifd = open(rawname(ddname), O_RDONLY)) == -1) { |
| 446 | log(LOG_WARNING, "Can't open %s (%m); using block device", |
| 447 | rawname(ddname)); |
| 448 | ifd = dumpfd; |
| 449 | } |
| 450 | Lseek(dumpfd, (off_t)(dumplo + ok(dump_nl[X_DUMPSIZE].n_value)), L_SET); |
| 451 | Read(dumpfd, (char *)&dumpsize, sizeof (dumpsize)); |
| 452 | (void)sprintf(cp, "ram.%d", bounds); |
| 453 | ofd = Create(path(cp), 0644); |
| 454 | Lseek(ifd, (off_t)dumplo, L_SET); |
| 455 | dumpsize *= NBPG; |
| 456 | log(LOG_NOTICE, "Saving %d bytes of image in ram.%d\n", |
| 457 | dumpsize, bounds); |
| 458 | while (dumpsize > 0) { |
| 459 | n = read(ifd, cp, |
| 460 | dumpsize > BUFSIZE ? BUFSIZE : dumpsize); |
| 461 | if (n <= 0) { |
| 462 | if (n == 0) |
| 463 | log(LOG_WARNING, |
| 464 | "WARNING: EOF on dump device; %s\n", |
| 465 | "ram file may be incomplete"); |
| 466 | else |
| 467 | Perror(LOG_ERR, "read from dumpdev: %m", |
| 468 | "read"); |
| 469 | break; |
| 470 | } |
| 471 | if ((ret = write(ofd, cp, n)) < n) { |
| 472 | if (ret < 0) |
| 473 | Perror(LOG_ERR, "write: %m", "write"); |
| 474 | else |
| 475 | log(LOG_ERR, "short write: wrote %d of %d\n", |
| 476 | ret, n); |
| 477 | log(LOG_WARNING, "WARNING: ram file may be incomplete\n"); |
| 478 | break; |
| 479 | } |
| 480 | dumpsize -= n; |
| 481 | } |
| 482 | close(ifd); |
| 483 | close(ofd); |
| 484 | bfile = path("bounds"); |
| 485 | fp = fopen(bfile, "w"); |
| 486 | if (fp) { |
| 487 | fprintf(fp, "%d\n", bounds+1); |
| 488 | fclose(fp); |
| 489 | } else |
| 490 | Perror(LOG_ERR, "Can't create bounds file %s: %m", bfile); |
| 491 | free(cp); |
| 492 | } |
| 493 | |
| 494 | /* |
| 495 | * Versions of std routines that exit on error. |
| 496 | */ |
| 497 | Open(name, rw) |
| 498 | char *name; |
| 499 | int rw; |
| 500 | { |
| 501 | int fd; |
| 502 | |
| 503 | fd = open(name, rw); |
| 504 | if (fd < 0) { |
| 505 | Perror(LOG_ERR, "%s: %m", name); |
| 506 | exit(1); |
| 507 | } |
| 508 | return (fd); |
| 509 | } |
| 510 | |
| 511 | Read(fd, buff, size) |
| 512 | int fd, size; |
| 513 | char *buff; |
| 514 | { |
| 515 | int ret; |
| 516 | |
| 517 | ret = read(fd, buff, size); |
| 518 | if (ret < 0) { |
| 519 | Perror(LOG_ERR, "read: %m", "read"); |
| 520 | exit(1); |
| 521 | } |
| 522 | return (ret); |
| 523 | } |
| 524 | |
| 525 | off_t |
| 526 | Lseek(fd, off, flag) |
| 527 | int fd, flag; |
| 528 | long off; |
| 529 | { |
| 530 | long ret; |
| 531 | |
| 532 | ret = lseek(fd, off, flag); |
| 533 | if (ret == -1) { |
| 534 | Perror(LOG_ERR, "lseek: %m", "lseek"); |
| 535 | exit(1); |
| 536 | } |
| 537 | return (ret); |
| 538 | } |
| 539 | |
| 540 | Create(file, mode) |
| 541 | char *file; |
| 542 | int mode; |
| 543 | { |
| 544 | register int fd; |
| 545 | |
| 546 | fd = creat(file, mode); |
| 547 | if (fd < 0) { |
| 548 | Perror(LOG_ERR, "%s: %m", file); |
| 549 | exit(1); |
| 550 | } |
| 551 | return (fd); |
| 552 | } |
| 553 | |
| 554 | Write(fd, buf, size) |
| 555 | int fd, size; |
| 556 | char *buf; |
| 557 | { |
| 558 | int n; |
| 559 | |
| 560 | if ((n = write(fd, buf, size)) < size) { |
| 561 | if (n < 0) |
| 562 | Perror(LOG_ERR, "write: %m", "write"); |
| 563 | else |
| 564 | log(LOG_ERR, "short write: wrote %d of %d\n", n, size); |
| 565 | exit(1); |
| 566 | } |
| 567 | } |
| 568 | |
| 569 | /* VARARGS2 */ |
| 570 | log(level, msg, a1, a2) |
| 571 | int level; |
| 572 | char *msg; |
| 573 | { |
| 574 | |
| 575 | fprintf(stderr, msg, a1, a2); |
| 576 | syslog(level, msg, a1, a2); |
| 577 | } |
| 578 | |
| 579 | Perror(level, msg, s) |
| 580 | int level; |
| 581 | char *msg, *s; |
| 582 | { |
| 583 | int oerrno = errno; |
| 584 | |
| 585 | perror(s); |
| 586 | errno = oerrno; |
| 587 | syslog(level, msg, s); |
| 588 | } |
| 589 | |
| 590 | usage() |
| 591 | { |
| 592 | (void)fprintf(stderr, "usage: savecore [-cfv] dirname [system]\n"); |
| 593 | exit(1); |
| 594 | } |