Commit | Line | Data |
---|---|---|
0910ad56 | 1 | /*- |
62d2933c KB |
2 | * Copyright (c) 1986, 1992, 1993 |
3 | * The Regents of the University of California. All rights reserved. | |
5c709f29 | 4 | * |
d60d530a | 5 | * %sccs.include.redist.c% |
5ff67f98 DF |
6 | */ |
7 | ||
261f5d78 | 8 | #ifndef lint |
62d2933c KB |
9 | static char copyright[] = |
10 | "@(#) Copyright (c) 1986, 1992, 1993\n\ | |
11 | The Regents of the University of California. All rights reserved.\n"; | |
5c709f29 | 12 | #endif /* not lint */ |
5ff67f98 DF |
13 | |
14 | #ifndef lint | |
62d0651a | 15 | static char sccsid[] = "@(#)savecore.c 8.3 (Berkeley) %G%"; |
5c709f29 | 16 | #endif /* not lint */ |
261f5d78 | 17 | |
d112e9ff | 18 | #include <sys/param.h> |
d112e9ff | 19 | #include <sys/stat.h> |
2ad23575 | 20 | #include <sys/mount.h> |
a8bf8cf3 | 21 | #include <sys/syslog.h> |
0910ad56 KB |
22 | #include <sys/time.h> |
23 | ||
2a15fef8 | 24 | #include <dirent.h> |
2ad23575 KB |
25 | #include <errno.h> |
26 | #include <fcntl.h> | |
f76fd03c | 27 | #include <nlist.h> |
7abf8d65 | 28 | #include <paths.h> |
0910ad56 KB |
29 | #include <stdio.h> |
30 | #include <stdlib.h> | |
31 | #include <string.h> | |
2ad23575 | 32 | #include <tzfile.h> |
0910ad56 | 33 | #include <unistd.h> |
d112e9ff | 34 | |
0e13cc10 | 35 | #define ok(number) ((number) - KERNBASE) |
97d6da0b | 36 | |
2ad23575 | 37 | struct nlist current_nl[] = { /* Namelist for currently running system. */ |
d112e9ff BJ |
38 | #define X_DUMPDEV 0 |
39 | { "_dumpdev" }, | |
40 | #define X_DUMPLO 1 | |
41 | { "_dumplo" }, | |
42 | #define X_TIME 2 | |
43 | { "_time" }, | |
261f5d78 SL |
44 | #define X_DUMPSIZE 3 |
45 | { "_dumpsize" }, | |
d112e9ff BJ |
46 | #define X_VERSION 4 |
47 | { "_version" }, | |
48 | #define X_PANICSTR 5 | |
49 | { "_panicstr" }, | |
261f5d78 SL |
50 | #define X_DUMPMAG 6 |
51 | { "_dumpmag" }, | |
52 | { "" }, | |
d112e9ff | 53 | }; |
2ad23575 KB |
54 | int cursyms[] = { X_DUMPDEV, X_DUMPLO, X_VERSION, X_DUMPMAG, -1 }; |
55 | int dumpsyms[] = { X_TIME, X_DUMPSIZE, X_VERSION, X_PANICSTR, X_DUMPMAG, -1 }; | |
d112e9ff | 56 | |
2ad23575 KB |
57 | struct nlist dump_nl[] = { /* Name list for dumped system. */ |
58 | { "_dumpdev" }, /* Entries MUST be the same as */ | |
59 | { "_dumplo" }, /* those in current_nl[]. */ | |
a3e4f1d7 RC |
60 | { "_time" }, |
61 | { "_dumpsize" }, | |
62 | { "_version" }, | |
63 | { "_panicstr" }, | |
64 | { "_dumpmag" }, | |
65 | { "" }, | |
66 | }; | |
67 | ||
2ad23575 KB |
68 | /* Types match kernel declarations. */ |
69 | long dumplo; /* where dump starts on dumpdev */ | |
70 | int dumpmag; /* magic number in dump */ | |
71 | int dumpsize; /* amount of memory dumped */ | |
72 | ||
0910ad56 | 73 | char *vmunix; |
97d6da0b BJ |
74 | char *dirname; /* directory to save dumps in */ |
75 | char *ddname; /* name of dump device */ | |
97d6da0b | 76 | dev_t dumpdev; /* dump device */ |
2ad23575 | 77 | int dumpfd; /* read/write descriptor on block dev */ |
97d6da0b | 78 | time_t now; /* current date */ |
2ad23575 | 79 | char panic_mesg[1024]; |
97d6da0b | 80 | int panicstr; |
2ad23575 KB |
81 | char vers[1024]; |
82 | ||
83 | int clear, compress, force, verbose; /* flags */ | |
d112e9ff | 84 | |
2ad23575 KB |
85 | void check_kmem __P((void)); |
86 | int check_space __P((void)); | |
87 | void clear_dump __P((void)); | |
88 | int Create __P((char *, int)); | |
89 | int dump_exists __P((void)); | |
bea95b84 | 90 | char *find_dev __P((dev_t, int)); |
2ad23575 KB |
91 | int get_crashtime __P((void)); |
92 | void kmem_setup __P((void)); | |
93 | void log __P((int, char *, ...)); | |
94 | void Lseek __P((int, off_t, int)); | |
95 | int Open __P((char *, int rw)); | |
96 | int Read __P((int, void *, int)); | |
0910ad56 | 97 | char *rawname __P((char *s)); |
2ad23575 KB |
98 | void save_core __P((void)); |
99 | void usage __P((void)); | |
100 | void Write __P((int, void *, int)); | |
0910ad56 KB |
101 | |
102 | int | |
d112e9ff | 103 | main(argc, argv) |
97d6da0b | 104 | int argc; |
0910ad56 | 105 | char *argv[]; |
d112e9ff | 106 | { |
01d84d6a | 107 | int ch; |
865f9d47 | 108 | |
2ad23575 KB |
109 | openlog("savecore", LOG_PERROR, LOG_DAEMON); |
110 | ||
6a655f32 | 111 | while ((ch = getopt(argc, argv, "cdfNvz")) != EOF) |
01d84d6a KB |
112 | switch(ch) { |
113 | case 'c': | |
114 | clear = 1; | |
c6e3f9fb | 115 | break; |
2ad23575 | 116 | case 'd': /* Not documented. */ |
a3e4f1d7 | 117 | case 'v': |
01d84d6a | 118 | verbose = 1; |
a3e4f1d7 | 119 | break; |
01d84d6a KB |
120 | case 'f': |
121 | force = 1; | |
99b8650e | 122 | break; |
6a655f32 KB |
123 | case 'N': |
124 | vmunix = optarg; | |
125 | break; | |
2ad23575 KB |
126 | case 'z': |
127 | compress = 1; | |
128 | break; | |
01d84d6a | 129 | case '?': |
a3e4f1d7 | 130 | default: |
01d84d6a | 131 | usage(); |
a3e4f1d7 | 132 | } |
01d84d6a KB |
133 | argc -= optind; |
134 | argv += optind; | |
135 | ||
01d84d6a KB |
136 | if (!clear) { |
137 | if (argc != 1 && argc != 2) | |
138 | usage(); | |
139 | dirname = argv[0]; | |
d112e9ff | 140 | } |
865f9d47 | 141 | if (argc == 2) |
0910ad56 | 142 | vmunix = argv[1]; |
01d84d6a | 143 | |
2ad23575 KB |
144 | (void)time(&now); |
145 | kmem_setup(); | |
01d84d6a | 146 | |
739955be KM |
147 | } |
148 | ||
0910ad56 | 149 | void |
2ad23575 | 150 | kmem_setup() |
d112e9ff | 151 | { |
865f9d47 | 152 | FILE *fp; |
865f9d47 | 153 | int kmem, i; |
0910ad56 | 154 | char *dump_sys; |
a3e4f1d7 | 155 | |
a3e4f1d7 | 156 | /* |
2ad23575 KB |
157 | * Some names we need for the currently running system, others for |
158 | * the system that was running when the dump was made. The values | |
159 | * obtained from the current system are used to look for things in | |
160 | * /dev/kmem that cannot be found in the dump_sys namelist, but are | |
161 | * presumed to be the same (since the disk partitions are probably | |
162 | * the same!) | |
a3e4f1d7 | 163 | */ |
2ad23575 KB |
164 | if ((nlist(_PATH_UNIX, current_nl)) == -1) |
165 | syslog(LOG_ERR, "%s: nlist: %s", _PATH_UNIX, strerror(errno)); | |
865f9d47 SL |
166 | for (i = 0; cursyms[i] != -1; i++) |
167 | if (current_nl[cursyms[i]].n_value == 0) { | |
2ad23575 KB |
168 | syslog(LOG_ERR, "%s: %s not in namelist", |
169 | _PATH_UNIX, current_nl[cursyms[i]].n_name); | |
865f9d47 SL |
170 | exit(1); |
171 | } | |
2ad23575 KB |
172 | |
173 | dump_sys = vmunix ? vmunix : _PATH_UNIX; | |
174 | if ((nlist(dump_sys, dump_nl)) == -1) | |
175 | syslog(LOG_ERR, "%s: nlist: %s", dump_sys, strerror(errno)); | |
865f9d47 SL |
176 | for (i = 0; dumpsyms[i] != -1; i++) |
177 | if (dump_nl[dumpsyms[i]].n_value == 0) { | |
2ad23575 KB |
178 | syslog(LOG_ERR, "%s: %s not in namelist", |
179 | dump_sys, dump_nl[dumpsyms[i]].n_name); | |
865f9d47 SL |
180 | exit(1); |
181 | } | |
2ad23575 | 182 | |
f76fd03c | 183 | kmem = Open(_PATH_KMEM, O_RDONLY); |
ce12e961 | 184 | Lseek(kmem, (off_t)current_nl[X_DUMPDEV].n_value, L_SET); |
2ad23575 | 185 | (void)Read(kmem, &dumpdev, sizeof(dumpdev)); |
62d0651a KB |
186 | if (dumpdev == NODEV) { |
187 | syslog(LOG_WARNING, "no core dump (no dumpdev)"); | |
188 | exit(1); | |
189 | } | |
ce12e961 | 190 | Lseek(kmem, (off_t)current_nl[X_DUMPLO].n_value, L_SET); |
2ad23575 | 191 | (void)Read(kmem, &dumplo, sizeof(dumplo)); |
01d84d6a | 192 | if (verbose) |
2ad23575 KB |
193 | (void)printf("dumplo = %d (%d * %d)\n", |
194 | dumplo, dumplo/DEV_BSIZE, DEV_BSIZE); | |
ce12e961 | 195 | Lseek(kmem, (off_t)current_nl[X_DUMPMAG].n_value, L_SET); |
2ad23575 | 196 | (void)Read(kmem, &dumpmag, sizeof(dumpmag)); |
f53aabcb | 197 | dumplo *= DEV_BSIZE; |
d112e9ff | 198 | ddname = find_dev(dumpdev, S_IFBLK); |
95503932 | 199 | dumpfd = Open(ddname, O_RDWR); |
865f9d47 SL |
200 | fp = fdopen(kmem, "r"); |
201 | if (fp == NULL) { | |
2ad23575 | 202 | syslog(LOG_ERR, "%s: fdopen: %m", _PATH_KMEM); |
97d6da0b | 203 | exit(1); |
d112e9ff | 204 | } |
0910ad56 | 205 | if (vmunix) |
f6cc4b0d | 206 | return; |
2ad23575 KB |
207 | (void)fseek(fp, (off_t)current_nl[X_VERSION].n_value, L_SET); |
208 | (void)fgets(vers, sizeof(vers), fp); | |
209 | ||
210 | /* Don't fclose(fp), we use dumpfd later. */ | |
798fe693 SL |
211 | } |
212 | ||
0910ad56 | 213 | void |
5638c7c2 SL |
214 | check_kmem() |
215 | { | |
798fe693 | 216 | register char *cp; |
2ad23575 KB |
217 | FILE *fp; |
218 | char core_vers[1024]; | |
798fe693 | 219 | |
95503932 | 220 | fp = fdopen(dumpfd, "r"); |
865f9d47 | 221 | if (fp == NULL) { |
2ad23575 | 222 | syslog(LOG_ERR, "%s: fdopen: %m", ddname); |
97d6da0b | 223 | exit(1); |
d112e9ff | 224 | } |
2ad23575 KB |
225 | fseek(fp, (off_t)(dumplo + ok(dump_nl[X_VERSION].n_value)), L_SET); |
226 | fgets(core_vers, sizeof(core_vers), fp); | |
227 | if (strcmp(vers, core_vers) && vmunix == 0) | |
228 | syslog(LOG_WARNING, | |
229 | "warning: %s version mismatch:\n\t%s\nand\t%s\n", | |
230 | _PATH_UNIX, vers, core_vers); | |
231 | (void)fseek(fp, | |
232 | (off_t)(dumplo + ok(dump_nl[X_PANICSTR].n_value)), L_SET); | |
233 | (void)fread(&panicstr, sizeof(panicstr), 1, fp); | |
97d6da0b | 234 | if (panicstr) { |
2ad23575 | 235 | (void)fseek(fp, dumplo + ok(panicstr), L_SET); |
d112e9ff BJ |
236 | cp = panic_mesg; |
237 | do | |
238 | *cp = getc(fp); | |
95503932 | 239 | while (*cp++ && cp < &panic_mesg[sizeof(panic_mesg)]); |
d112e9ff | 240 | } |
2ad23575 KB |
241 | /* Don't fclose(fp), we use dumpfd later. */ |
242 | } | |
243 | ||
244 | void | |
245 | clear_dump() | |
246 | { | |
247 | long newdumplo; | |
248 | ||
249 | newdumplo = 0; | |
250 | Lseek(dumpfd, (off_t)(dumplo + ok(dump_nl[X_DUMPMAG].n_value)), L_SET); | |
251 | Write(dumpfd, &newdumplo, sizeof(newdumplo)); | |
f6cc4b0d | 252 | } |
d112e9ff | 253 | |
0910ad56 | 254 | int |
2ad23575 | 255 | dump_exists() |
97d6da0b | 256 | { |
2ad23575 | 257 | int newdumpmag; |
d112e9ff | 258 | |
2ad23575 KB |
259 | Lseek(dumpfd, (off_t)(dumplo + ok(dump_nl[X_DUMPMAG].n_value)), L_SET); |
260 | (void)Read(dumpfd, &newdumpmag, sizeof(newdumpmag)); | |
261 | if (newdumpmag != dumpmag) { | |
3143c0b3 KB |
262 | if (verbose) |
263 | syslog(LOG_WARNING, "magic number mismatch (%x != %x)", | |
264 | newdumpmag, dumpmag); | |
2ad23575 | 265 | syslog(LOG_WARNING, "no core dump"); |
261f5d78 | 266 | return (0); |
d112e9ff | 267 | } |
261f5d78 | 268 | return (1); |
d112e9ff BJ |
269 | } |
270 | ||
2ad23575 KB |
271 | char buf[1024 * 1024]; |
272 | ||
273 | void | |
274 | save_core() | |
d112e9ff | 275 | { |
2ad23575 KB |
276 | register FILE *fp; |
277 | register int bounds, ifd, nr, nw, ofd; | |
278 | char *rawp, path[MAXPATHLEN]; | |
279 | ||
280 | /* | |
281 | * Get the current number and update the bounds file. Do the update | |
282 | * now, because may fail later and don't want to overwrite anything. | |
283 | */ | |
284 | (void)snprintf(path, sizeof(path), "%s/bounds", dirname); | |
285 | if ((fp = fopen(path, "r")) == NULL) | |
286 | goto err1; | |
287 | if (fgets(buf, sizeof(buf), fp) == NULL) { | |
288 | if (ferror(fp)) | |
289 | err1: syslog(LOG_WARNING, "%s: %s", path, strerror(errno)); | |
290 | bounds = 0; | |
291 | } else | |
292 | bounds = atoi(buf); | |
293 | if (fp != NULL) | |
294 | (void)fclose(fp); | |
295 | if ((fp = fopen(path, "w")) == NULL) | |
296 | syslog(LOG_ERR, "%s: %m", path); | |
297 | else { | |
298 | (void)fprintf(fp, "%d\n", bounds + 1); | |
299 | (void)fclose(fp); | |
300 | } | |
301 | (void)fclose(fp); | |
d112e9ff | 302 | |
2ad23575 KB |
303 | /* Create the core file. */ |
304 | (void)snprintf(path, sizeof(path), "%s/vmcore.%d%s", | |
305 | dirname, bounds, compress ? ".Z" : ""); | |
306 | if (compress) { | |
307 | if ((fp = zopen(path, "w", 0)) == NULL) { | |
308 | syslog(LOG_ERR, "%s: %s", path, strerror(errno)); | |
309 | exit(1); | |
310 | } | |
311 | } else | |
60221963 | 312 | ofd = Create(path, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); |
2ad23575 KB |
313 | |
314 | /* Open the raw device. */ | |
315 | rawp = rawname(ddname); | |
316 | if ((ifd = open(rawp, O_RDONLY)) == -1) { | |
317 | syslog(LOG_WARNING, "%s: %m; using block device", rawp); | |
318 | ifd = dumpfd; | |
319 | } | |
320 | ||
321 | /* Read the dump size. */ | |
322 | Lseek(dumpfd, (off_t)(dumplo + ok(dump_nl[X_DUMPSIZE].n_value)), L_SET); | |
323 | (void)Read(dumpfd, &dumpsize, sizeof(dumpsize)); | |
324 | ||
325 | /* Seek to the start of the core. */ | |
326 | Lseek(ifd, (off_t)dumplo, L_SET); | |
327 | ||
328 | /* Copy the core file. */ | |
329 | dumpsize *= NBPG; | |
330 | syslog(LOG_NOTICE, "writing %score to %s", | |
331 | compress ? "compressed " : "", path); | |
332 | for (; dumpsize > 0; dumpsize -= nr) { | |
333 | (void)printf("%6dK\r", dumpsize / 1024); | |
334 | (void)fflush(stdout); | |
335 | nr = read(ifd, buf, MIN(dumpsize, sizeof(buf))); | |
336 | if (nr <= 0) { | |
337 | if (nr == 0) | |
338 | syslog(LOG_WARNING, | |
339 | "WARNING: EOF on dump device"); | |
340 | else | |
341 | syslog(LOG_ERR, "%s: %m", rawp); | |
342 | goto err2; | |
343 | } | |
344 | if (compress) | |
345 | nw = fwrite(buf, 1, nr, fp); | |
346 | else | |
347 | nw = write(ofd, buf, nr); | |
348 | if (nw != nr) { | |
349 | syslog(LOG_ERR, "%s: %s", | |
350 | path, strerror(nw == 0 ? EIO : errno)); | |
351 | err2: syslog(LOG_WARNING, | |
352 | "WARNING: vmcore may be incomplete"); | |
353 | (void)printf("\n"); | |
354 | exit(1); | |
355 | } | |
356 | } | |
357 | (void)printf("\n"); | |
358 | (void)close(ifd); | |
359 | if (compress) | |
360 | (void)fclose(fp); | |
361 | else | |
362 | (void)close(ofd); | |
363 | ||
364 | /* Copy the kernel. */ | |
6a655f32 | 365 | ifd = Open(vmunix ? vmunix : _PATH_UNIX, O_RDONLY); |
2ad23575 KB |
366 | (void)snprintf(path, sizeof(path), "%s/vmunix.%d%s", |
367 | dirname, bounds, compress ? ".Z" : ""); | |
368 | if (compress) { | |
369 | if ((fp = zopen(path, "w", 0)) == NULL) { | |
370 | syslog(LOG_ERR, "%s: %s", path, strerror(errno)); | |
371 | exit(1); | |
372 | } | |
373 | } else | |
32ee93da | 374 | ofd = Create(path, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); |
2ad23575 KB |
375 | syslog(LOG_NOTICE, "writing %skernel to %s", |
376 | compress ? "compressed " : "", path); | |
377 | while ((nr = read(ifd, buf, sizeof(buf))) > 0) { | |
378 | if (compress) | |
379 | nw = fwrite(buf, 1, nr, fp); | |
380 | else | |
381 | nw = write(ofd, buf, nr); | |
382 | if (nw != nr) { | |
383 | syslog(LOG_ERR, "%s: %s", | |
384 | path, strerror(nw == 0 ? EIO : errno)); | |
385 | syslog(LOG_WARNING, | |
386 | "WARNING: vmunix may be incomplete"); | |
387 | exit(1); | |
388 | } | |
389 | } | |
390 | if (nr < 0) { | |
391 | syslog(LOG_ERR, "%s: %s", | |
392 | vmunix ? vmunix : _PATH_UNIX, strerror(errno)); | |
393 | syslog(LOG_WARNING, | |
394 | "WARNING: vmunix may be incomplete"); | |
395 | exit(1); | |
396 | } | |
397 | if (compress) | |
398 | (void)fclose(fp); | |
399 | else | |
400 | (void)close(ofd); | |
d112e9ff BJ |
401 | } |
402 | ||
2ad23575 KB |
403 | char * |
404 | find_dev(dev, type) | |
405 | register dev_t dev; | |
406 | register int type; | |
d112e9ff | 407 | { |
2ad23575 KB |
408 | register DIR *dfd; |
409 | struct dirent *dir; | |
410 | struct stat sb; | |
411 | char *dp, devname[MAXPATHLEN + 1]; | |
d112e9ff | 412 | |
2ad23575 KB |
413 | if ((dfd = opendir(_PATH_DEV)) == NULL) { |
414 | syslog(LOG_ERR, "%s: %s", _PATH_DEV, strerror(errno)); | |
97d6da0b BJ |
415 | exit(1); |
416 | } | |
2ad23575 KB |
417 | (void)strcpy(devname, _PATH_DEV); |
418 | while ((dir = readdir(dfd))) { | |
419 | (void)strcpy(devname + sizeof(_PATH_DEV) - 1, dir->d_name); | |
62d0651a | 420 | if (lstat(devname, &sb)) { |
2ad23575 KB |
421 | syslog(LOG_ERR, "%s: %s", devname, strerror(errno)); |
422 | continue; | |
423 | } | |
424 | if ((sb.st_mode & S_IFMT) != type) | |
425 | continue; | |
426 | if (dev == sb.st_rdev) { | |
427 | closedir(dfd); | |
428 | if ((dp = strdup(devname)) == NULL) { | |
429 | syslog(LOG_ERR, "%s", strerror(errno)); | |
430 | exit(1); | |
431 | } | |
432 | return (dp); | |
433 | } | |
d112e9ff | 434 | } |
2ad23575 KB |
435 | closedir(dfd); |
436 | syslog(LOG_ERR, "can't find device %d/%d", major(dev), minor(dev)); | |
437 | exit(1); | |
438 | } | |
439 | ||
440 | char * | |
441 | rawname(s) | |
442 | char *s; | |
443 | { | |
444 | char *sl, name[MAXPATHLEN]; | |
445 | ||
446 | if ((sl = rindex(s, '/')) == NULL || sl[1] == '0') { | |
447 | syslog(LOG_ERR, | |
448 | "can't make raw dump device name from %s", s); | |
449 | return (s); | |
450 | } | |
451 | (void)snprintf(name, sizeof(name), "%.*s/r%s", sl - s, s, sl + 1); | |
452 | if ((sl = strdup(name)) == NULL) { | |
453 | syslog(LOG_ERR, "%s", strerror(errno)); | |
454 | exit(1); | |
455 | } | |
456 | return (sl); | |
d112e9ff BJ |
457 | } |
458 | ||
0910ad56 | 459 | int |
2ad23575 | 460 | get_crashtime() |
d112e9ff | 461 | { |
2ad23575 | 462 | time_t dumptime; /* Time the dump was taken. */ |
d112e9ff | 463 | |
2ad23575 KB |
464 | Lseek(dumpfd, (off_t)(dumplo + ok(dump_nl[X_TIME].n_value)), L_SET); |
465 | (void)Read(dumpfd, &dumptime, sizeof(dumptime)); | |
466 | if (dumptime == 0) { | |
467 | if (verbose) | |
468 | syslog(LOG_ERR, "dump time is zero"); | |
261f5d78 | 469 | return (0); |
2ad23575 KB |
470 | } |
471 | (void)printf("savecore: system went down at %s", ctime(&dumptime)); | |
472 | #define LEEWAY (7 * SECSPERDAY) | |
473 | if (dumptime < now - LEEWAY || dumptime > now + LEEWAY) { | |
474 | (void)printf("dump time is unreasonable\n"); | |
261f5d78 | 475 | return (0); |
d112e9ff | 476 | } |
2ad23575 | 477 | return (1); |
d112e9ff BJ |
478 | } |
479 | ||
0910ad56 | 480 | int |
2ad23575 | 481 | check_space() |
d112e9ff | 482 | { |
d112e9ff | 483 | register FILE *fp; |
f3c89e1f CT |
484 | char *tvmunix; |
485 | off_t minfree, spacefree, vmunixsize, needed; | |
486 | struct stat st; | |
2ad23575 | 487 | struct statfs fsbuf; |
2ad23575 | 488 | char buf[100], path[MAXPATHLEN]; |
d112e9ff | 489 | |
f3c89e1f CT |
490 | tvmunix = vmunix ? vmunix : _PATH_UNIX; |
491 | if (stat(tvmunix, &st) < 0) { | |
492 | syslog(LOG_ERR, "%s: %m", tvmunix); | |
493 | exit(1); | |
494 | } | |
495 | vmunixsize = st.st_blocks * S_BLKSIZE; | |
2ad23575 KB |
496 | if (statfs(dirname, &fsbuf) < 0) { |
497 | syslog(LOG_ERR, "%s: %m", dirname); | |
498 | exit(1); | |
4d1d39b2 | 499 | } |
6a655f32 | 500 | spacefree = (fsbuf.f_bavail * fsbuf.f_bsize) / 1024; |
2ad23575 KB |
501 | |
502 | (void)snprintf(path, sizeof(path), "%s/minfree", dirname); | |
503 | if ((fp = fopen(path, "r")) == NULL) | |
504 | minfree = 0; | |
505 | else { | |
506 | if (fgets(buf, sizeof(buf), fp) == NULL) | |
507 | minfree = 0; | |
508 | else | |
509 | minfree = atoi(buf); | |
510 | (void)fclose(fp); | |
95503932 | 511 | } |
2ad23575 | 512 | |
ae92fcca | 513 | needed = (dumpsize + vmunixsize) / 1024; |
f3c89e1f | 514 | if (minfree > 0 && spacefree - needed < minfree) { |
2ad23575 KB |
515 | syslog(LOG_WARNING, |
516 | "no dump, not enough free space on device"); | |
517 | return (0); | |
d112e9ff | 518 | } |
f3c89e1f | 519 | if (spacefree - needed < minfree) |
2ad23575 KB |
520 | syslog(LOG_WARNING, |
521 | "dump performed, but free space threshold crossed"); | |
522 | return (1); | |
d112e9ff BJ |
523 | } |
524 | ||
0910ad56 | 525 | int |
97d6da0b BJ |
526 | Open(name, rw) |
527 | char *name; | |
528 | int rw; | |
529 | { | |
530 | int fd; | |
531 | ||
2ad23575 KB |
532 | if ((fd = open(name, rw, 0)) < 0) { |
533 | syslog(LOG_ERR, "%s: %m", name); | |
97d6da0b BJ |
534 | exit(1); |
535 | } | |
865f9d47 | 536 | return (fd); |
97d6da0b BJ |
537 | } |
538 | ||
0910ad56 | 539 | int |
2ad23575 KB |
540 | Read(fd, bp, size) |
541 | int fd, size; | |
542 | void *bp; | |
97d6da0b | 543 | { |
2ad23575 | 544 | int nr; |
97d6da0b | 545 | |
2ad23575 KB |
546 | nr = read(fd, bp, size); |
547 | if (nr != size) { | |
548 | syslog(LOG_ERR, "read: %m"); | |
97d6da0b BJ |
549 | exit(1); |
550 | } | |
2ad23575 | 551 | return (nr); |
97d6da0b BJ |
552 | } |
553 | ||
ce12e961 | 554 | void |
97d6da0b | 555 | Lseek(fd, off, flag) |
2ad23575 | 556 | int fd, flag; |
ce12e961 | 557 | off_t off; |
97d6da0b | 558 | { |
2ad23575 | 559 | off_t ret; |
97d6da0b | 560 | |
2ad23575 | 561 | ret = lseek(fd, off, flag); |
865f9d47 | 562 | if (ret == -1) { |
2ad23575 | 563 | syslog(LOG_ERR, "lseek: %m"); |
97d6da0b BJ |
564 | exit(1); |
565 | } | |
97d6da0b BJ |
566 | } |
567 | ||
0910ad56 | 568 | int |
97d6da0b BJ |
569 | Create(file, mode) |
570 | char *file; | |
571 | int mode; | |
572 | { | |
573 | register int fd; | |
574 | ||
865f9d47 SL |
575 | fd = creat(file, mode); |
576 | if (fd < 0) { | |
2ad23575 | 577 | syslog(LOG_ERR, "%s: %m", file); |
97d6da0b BJ |
578 | exit(1); |
579 | } | |
865f9d47 | 580 | return (fd); |
97d6da0b BJ |
581 | } |
582 | ||
0910ad56 | 583 | void |
2ad23575 KB |
584 | Write(fd, bp, size) |
585 | int fd, size; | |
586 | void *bp; | |
97d6da0b | 587 | { |
bfda3826 | 588 | int n; |
97d6da0b | 589 | |
2ad23575 KB |
590 | if ((n = write(fd, bp, size)) < size) { |
591 | syslog(LOG_ERR, "write: %s", strerror(n == -1 ? errno : EIO)); | |
97d6da0b BJ |
592 | exit(1); |
593 | } | |
594 | } | |
ce104dfd | 595 | |
0910ad56 | 596 | void |
01d84d6a KB |
597 | usage() |
598 | { | |
6a655f32 | 599 | (void)syslog(LOG_ERR, "usage: savecore [-cfvz] [-N system] directory"); |
01d84d6a KB |
600 | exit(1); |
601 | } |