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Commit | Line | Data |
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aba5acdf SH |
1 | /* |
2 | * rtacct.c Applet to display contents of /proc/net/rt_acct. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <unistd.h> | |
16 | #include <fcntl.h> | |
17 | #include <string.h> | |
18 | #include <errno.h> | |
19 | #include <time.h> | |
20 | #include <sys/time.h> | |
21 | #include <fnmatch.h> | |
22 | #include <sys/file.h> | |
23 | #include <sys/socket.h> | |
24 | #include <sys/un.h> | |
25 | #include <sys/poll.h> | |
26 | #include <sys/wait.h> | |
27 | #include <sys/stat.h> | |
28 | #include <sys/mman.h> | |
29 | #include <signal.h> | |
30 | #include <math.h> | |
31 | ||
32 | #include "rt_names.h" | |
33 | ||
34 | #include <SNAPSHOT.h> | |
35 | ||
acd1e437 SH |
36 | int reset_history; |
37 | int ignore_history; | |
38 | int no_output; | |
39 | int no_update; | |
40 | int scan_interval; | |
41 | int time_constant; | |
42 | int dump_zeros; | |
43 | unsigned long magic_number; | |
aba5acdf SH |
44 | double W; |
45 | ||
4ffc44ca | 46 | static int generic_proc_open(const char *env, const char *name) |
aba5acdf SH |
47 | { |
48 | char store[1024]; | |
49 | char *p = getenv(env); | |
acd1e437 | 50 | |
aba5acdf SH |
51 | if (!p) { |
52 | p = getenv("PROC_ROOT") ? : "/proc"; | |
53 | snprintf(store, sizeof(store)-1, "%s/%s", p, name); | |
54 | p = store; | |
55 | } | |
4ffc44ca | 56 | return open(p, O_RDONLY); |
aba5acdf SH |
57 | } |
58 | ||
d1f28cf1 | 59 | static int net_rtacct_open(void) |
aba5acdf SH |
60 | { |
61 | return generic_proc_open("PROC_NET_RTACCT", "net/rt_acct"); | |
62 | } | |
63 | ||
d1f28cf1 | 64 | static __u32 rmap[256/4]; |
aba5acdf | 65 | |
acd1e437 | 66 | struct rtacct_data { |
aba5acdf SH |
67 | __u32 ival[256*4]; |
68 | ||
69 | unsigned long long val[256*4]; | |
70 | double rate[256*4]; | |
737f15f6 | 71 | char signature[128]; |
aba5acdf SH |
72 | }; |
73 | ||
d1f28cf1 | 74 | static struct rtacct_data kern_db_static; |
aba5acdf | 75 | |
d1f28cf1 SH |
76 | static struct rtacct_data *kern_db = &kern_db_static; |
77 | static struct rtacct_data *hist_db; | |
aba5acdf | 78 | |
d1f28cf1 | 79 | static void nread(int fd, char *buf, int tot) |
aba5acdf SH |
80 | { |
81 | int count = 0; | |
82 | ||
83 | while (count < tot) { | |
84 | int n = read(fd, buf+count, tot-count); | |
acd1e437 | 85 | |
aba5acdf SH |
86 | if (n < 0) { |
87 | if (errno == EINTR) | |
88 | continue; | |
89 | exit(-1); | |
90 | } | |
91 | if (n == 0) | |
92 | exit(-1); | |
93 | count += n; | |
94 | } | |
95 | } | |
96 | ||
d1f28cf1 | 97 | static __u32 *read_kern_table(__u32 *tbl) |
aba5acdf SH |
98 | { |
99 | static __u32 *tbl_ptr; | |
100 | int fd; | |
101 | ||
102 | if (magic_number) { | |
103 | if (tbl_ptr != NULL) | |
104 | return tbl_ptr; | |
105 | ||
106 | fd = open("/dev/mem", O_RDONLY); | |
107 | if (fd < 0) { | |
108 | perror("magic open"); | |
109 | exit(-1); | |
110 | } | |
111 | tbl_ptr = mmap(NULL, 4096, | |
112 | PROT_READ, | |
113 | MAP_SHARED, | |
114 | fd, magic_number); | |
115 | if ((unsigned long)tbl_ptr == ~0UL) { | |
116 | perror("magic mmap"); | |
117 | exit(-1); | |
118 | } | |
119 | close(fd); | |
120 | return tbl_ptr; | |
121 | } | |
122 | ||
123 | fd = net_rtacct_open(); | |
124 | if (fd >= 0) { | |
acd1e437 | 125 | nread(fd, (char *)tbl, 256*16); |
aba5acdf SH |
126 | close(fd); |
127 | } else { | |
128 | memset(tbl, 0, 256*16); | |
129 | } | |
130 | return tbl; | |
131 | } | |
132 | ||
d1f28cf1 | 133 | static void format_rate(FILE *fp, double rate) |
aba5acdf SH |
134 | { |
135 | char temp[64]; | |
136 | ||
137 | if (rate > 1024*1024) { | |
acd1e437 | 138 | sprintf(temp, "%uM", (unsigned int)rint(rate/(1024*1024))); |
aba5acdf SH |
139 | fprintf(fp, " %-10s", temp); |
140 | } else if (rate > 1024) { | |
acd1e437 | 141 | sprintf(temp, "%uK", (unsigned int)rint(rate/1024)); |
aba5acdf SH |
142 | fprintf(fp, " %-10s", temp); |
143 | } else | |
acd1e437 | 144 | fprintf(fp, " %-10u", (unsigned int)rate); |
aba5acdf SH |
145 | } |
146 | ||
d1f28cf1 | 147 | static void format_count(FILE *fp, unsigned long long val) |
aba5acdf SH |
148 | { |
149 | if (val > 1024*1024*1024) | |
150 | fprintf(fp, " %10lluM", val/(1024*1024)); | |
151 | else if (val > 1024*1024) | |
152 | fprintf(fp, " %10lluK", val/1024); | |
153 | else | |
154 | fprintf(fp, " %10llu", val); | |
155 | } | |
156 | ||
d1f28cf1 | 157 | static void dump_abs_db(FILE *fp) |
aba5acdf SH |
158 | { |
159 | int realm; | |
160 | char b1[16]; | |
161 | ||
162 | if (!no_output) { | |
163 | fprintf(fp, "#%s\n", kern_db->signature); | |
164 | fprintf(fp, | |
acd1e437 SH |
165 | "%-10s %-10s " |
166 | "%-10s %-10s " | |
167 | "%-10s \n" | |
ae665a52 | 168 | , "Realm", "BytesTo", "PktsTo", "BytesFrom", "PktsFrom"); |
aba5acdf | 169 | fprintf(fp, |
acd1e437 SH |
170 | "%-10s %-10s " |
171 | "%-10s %-10s " | |
172 | "%-10s \n" | |
ae665a52 | 173 | , "", "BPSTo", "PPSTo", "BPSFrom", "PPSFrom"); |
aba5acdf SH |
174 | |
175 | } | |
176 | ||
acd1e437 | 177 | for (realm = 0; realm < 256; realm++) { |
aba5acdf SH |
178 | int i; |
179 | unsigned long long *val; | |
180 | double *rate; | |
181 | ||
182 | if (!(rmap[realm>>5] & (1<<(realm&0x1f)))) | |
183 | continue; | |
184 | ||
185 | val = &kern_db->val[realm*4]; | |
186 | rate = &kern_db->rate[realm*4]; | |
187 | ||
188 | if (!dump_zeros && | |
189 | !val[0] && !rate[0] && | |
190 | !val[1] && !rate[1] && | |
191 | !val[2] && !rate[2] && | |
192 | !val[3] && !rate[3]) | |
193 | continue; | |
194 | ||
195 | if (hist_db) { | |
196 | memcpy(&hist_db->val[realm*4], val, sizeof(*val)*4); | |
197 | } | |
198 | ||
199 | if (no_output) | |
200 | continue; | |
201 | ||
202 | fprintf(fp, "%-10s", rtnl_rtrealm_n2a(realm, b1, sizeof(b1))); | |
203 | for (i = 0; i < 4; i++) | |
ae665a52 | 204 | format_count(fp, val[i]); |
aba5acdf SH |
205 | fprintf(fp, "\n%-10s", ""); |
206 | for (i = 0; i < 4; i++) | |
ae665a52 | 207 | format_rate(fp, rate[i]); |
aba5acdf SH |
208 | fprintf(fp, "\n"); |
209 | } | |
210 | } | |
211 | ||
212 | ||
d1f28cf1 | 213 | static void dump_incr_db(FILE *fp) |
aba5acdf SH |
214 | { |
215 | int k, realm; | |
216 | char b1[16]; | |
217 | ||
218 | if (!no_output) { | |
219 | fprintf(fp, "#%s\n", kern_db->signature); | |
220 | fprintf(fp, | |
acd1e437 SH |
221 | "%-10s %-10s " |
222 | "%-10s %-10s " | |
223 | "%-10s \n" | |
ae665a52 | 224 | , "Realm", "BytesTo", "PktsTo", "BytesFrom", "PktsFrom"); |
aba5acdf | 225 | fprintf(fp, |
acd1e437 SH |
226 | "%-10s %-10s " |
227 | "%-10s %-10s " | |
228 | "%-10s \n" | |
ae665a52 | 229 | , "", "BPSTo", "PPSTo", "BPSFrom", "PPSFrom"); |
aba5acdf SH |
230 | } |
231 | ||
acd1e437 | 232 | for (realm = 0; realm < 256; realm++) { |
aba5acdf SH |
233 | int ovfl = 0; |
234 | int i; | |
235 | unsigned long long *val; | |
236 | double *rate; | |
237 | unsigned long long rval[4]; | |
238 | ||
239 | if (!(rmap[realm>>5] & (1<<(realm&0x1f)))) | |
240 | continue; | |
241 | ||
242 | val = &kern_db->val[realm*4]; | |
243 | rate = &kern_db->rate[realm*4]; | |
244 | ||
acd1e437 | 245 | for (k = 0; k < 4; k++) { |
aba5acdf SH |
246 | rval[k] = val[k]; |
247 | if (rval[k] < hist_db->val[realm*4+k]) | |
248 | ovfl = 1; | |
249 | else | |
250 | rval[k] -= hist_db->val[realm*4+k]; | |
251 | } | |
252 | if (ovfl) { | |
acd1e437 | 253 | for (k = 0; k < 4; k++) |
aba5acdf SH |
254 | rval[k] = val[k]; |
255 | } | |
256 | if (hist_db) { | |
257 | memcpy(&hist_db->val[realm*4], val, sizeof(*val)*4); | |
258 | } | |
259 | ||
260 | if (no_output) | |
261 | continue; | |
262 | ||
263 | if (!dump_zeros && | |
264 | !rval[0] && !rate[0] && | |
265 | !rval[1] && !rate[1] && | |
266 | !rval[2] && !rate[2] && | |
267 | !rval[3] && !rate[3]) | |
268 | continue; | |
269 | ||
270 | ||
271 | fprintf(fp, "%-10s", rtnl_rtrealm_n2a(realm, b1, sizeof(b1))); | |
272 | for (i = 0; i < 4; i++) | |
ae665a52 | 273 | format_count(fp, rval[i]); |
aba5acdf SH |
274 | fprintf(fp, "\n%-10s", ""); |
275 | for (i = 0; i < 4; i++) | |
ae665a52 | 276 | format_rate(fp, rate[i]); |
aba5acdf SH |
277 | fprintf(fp, "\n"); |
278 | } | |
279 | } | |
280 | ||
281 | ||
282 | static int children; | |
283 | ||
d1f28cf1 | 284 | static void sigchild(int signo) |
aba5acdf SH |
285 | { |
286 | } | |
287 | ||
ae665a52 | 288 | /* Server side only: read kernel data, update tables, calculate rates. */ |
aba5acdf | 289 | |
d1f28cf1 | 290 | static void update_db(int interval) |
aba5acdf SH |
291 | { |
292 | int i; | |
293 | __u32 *ival; | |
294 | __u32 _ival[256*4]; | |
295 | ||
296 | ival = read_kern_table(_ival); | |
297 | ||
acd1e437 | 298 | for (i = 0; i < 256*4; i++) { |
aba5acdf SH |
299 | double sample; |
300 | __u32 incr = ival[i] - kern_db->ival[i]; | |
301 | ||
302 | if (ival[i] == 0 && incr == 0 && | |
303 | kern_db->val[i] == 0 && kern_db->rate[i] == 0) | |
304 | continue; | |
305 | ||
306 | kern_db->val[i] += incr; | |
307 | kern_db->ival[i] = ival[i]; | |
308 | sample = (double)(incr*1000)/interval; | |
309 | if (interval >= scan_interval) { | |
310 | kern_db->rate[i] += W*(sample-kern_db->rate[i]); | |
311 | } else if (interval >= 1000) { | |
312 | if (interval >= time_constant) { | |
313 | kern_db->rate[i] = sample; | |
314 | } else { | |
315 | double w = W*(double)interval/scan_interval; | |
acd1e437 | 316 | |
aba5acdf SH |
317 | kern_db->rate[i] += w*(sample-kern_db->rate[i]); |
318 | } | |
319 | } | |
320 | } | |
321 | } | |
322 | ||
d1f28cf1 | 323 | static void send_db(int fd) |
aba5acdf SH |
324 | { |
325 | int tot = 0; | |
326 | ||
327 | while (tot < sizeof(*kern_db)) { | |
acd1e437 SH |
328 | int n = write(fd, ((char *)kern_db) + tot, sizeof(*kern_db)-tot); |
329 | ||
aba5acdf SH |
330 | if (n < 0) { |
331 | if (errno == EINTR) | |
332 | continue; | |
333 | return; | |
334 | } | |
335 | tot += n; | |
336 | } | |
337 | } | |
338 | ||
339 | ||
340 | ||
acd1e437 | 341 | #define T_DIFF(a, b) (((a).tv_sec-(b).tv_sec)*1000 + ((a).tv_usec-(b).tv_usec)/1000) |
aba5acdf SH |
342 | |
343 | ||
d1f28cf1 | 344 | static void pad_kern_table(struct rtacct_data *dat, __u32 *ival) |
aba5acdf SH |
345 | { |
346 | int i; | |
acd1e437 | 347 | |
aba5acdf SH |
348 | memset(dat->rate, 0, sizeof(dat->rate)); |
349 | if (dat->ival != ival) | |
350 | memcpy(dat->ival, ival, sizeof(dat->ival)); | |
acd1e437 | 351 | for (i = 0; i < 256*4; i++) |
aba5acdf SH |
352 | dat->val[i] = ival[i]; |
353 | } | |
354 | ||
d1f28cf1 | 355 | static void server_loop(int fd) |
aba5acdf | 356 | { |
737f15f6 | 357 | struct timeval snaptime = { 0 }; |
aba5acdf | 358 | struct pollfd p; |
acd1e437 | 359 | |
aba5acdf SH |
360 | p.fd = fd; |
361 | p.events = p.revents = POLLIN; | |
362 | ||
ae665a52 | 363 | sprintf(kern_db->signature, |
737f15f6 | 364 | "%u.%lu sampling_interval=%d time_const=%d", |
acd1e437 | 365 | (unsigned int) getpid(), (unsigned long)random(), |
737f15f6 | 366 | scan_interval/1000, time_constant/1000); |
aba5acdf SH |
367 | |
368 | pad_kern_table(kern_db, read_kern_table(kern_db->ival)); | |
369 | ||
370 | for (;;) { | |
371 | int status; | |
372 | int tdiff; | |
373 | struct timeval now; | |
acd1e437 | 374 | |
aba5acdf SH |
375 | gettimeofday(&now, NULL); |
376 | tdiff = T_DIFF(now, snaptime); | |
377 | if (tdiff >= scan_interval) { | |
378 | update_db(tdiff); | |
379 | snaptime = now; | |
380 | tdiff = 0; | |
381 | } | |
382 | if (poll(&p, 1, tdiff + scan_interval) > 0 | |
383 | && (p.revents&POLLIN)) { | |
384 | int clnt = accept(fd, NULL, NULL); | |
acd1e437 | 385 | |
aba5acdf SH |
386 | if (clnt >= 0) { |
387 | pid_t pid; | |
acd1e437 | 388 | |
aba5acdf SH |
389 | if (children >= 5) { |
390 | close(clnt); | |
391 | } else if ((pid = fork()) != 0) { | |
acd1e437 | 392 | if (pid > 0) |
aba5acdf SH |
393 | children++; |
394 | close(clnt); | |
395 | } else { | |
396 | if (tdiff > 0) | |
397 | update_db(tdiff); | |
398 | send_db(clnt); | |
399 | exit(0); | |
400 | } | |
401 | } | |
402 | } | |
403 | while (children && waitpid(-1, &status, WNOHANG) > 0) | |
404 | children--; | |
405 | } | |
406 | } | |
407 | ||
d1f28cf1 | 408 | static int verify_forging(int fd) |
aba5acdf SH |
409 | { |
410 | struct ucred cred; | |
737f15f6 SH |
411 | socklen_t olen = sizeof(cred); |
412 | ||
acd1e437 | 413 | if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, (void *)&cred, &olen) || |
aba5acdf SH |
414 | olen < sizeof(cred)) |
415 | return -1; | |
416 | if (cred.uid == getuid() || cred.uid == 0) | |
417 | return 0; | |
418 | return -1; | |
419 | } | |
420 | ||
421 | static void usage(void) __attribute__((noreturn)); | |
422 | ||
423 | static void usage(void) | |
424 | { | |
425 | fprintf(stderr, | |
426 | "Usage: rtacct [ -h?vVzrnasd:t: ] [ ListOfRealms ]\n" | |
427 | ); | |
428 | exit(-1); | |
429 | } | |
430 | ||
431 | int main(int argc, char *argv[]) | |
432 | { | |
433 | char hist_name[128]; | |
434 | struct sockaddr_un sun; | |
435 | int ch; | |
436 | int fd; | |
437 | ||
438 | while ((ch = getopt(argc, argv, "h?vVzrM:nasd:t:")) != EOF) { | |
acd1e437 | 439 | switch (ch) { |
aba5acdf SH |
440 | case 'z': |
441 | dump_zeros = 1; | |
442 | break; | |
443 | case 'r': | |
444 | reset_history = 1; | |
445 | break; | |
446 | case 'a': | |
447 | ignore_history = 1; | |
448 | break; | |
449 | case 's': | |
450 | no_update = 1; | |
451 | break; | |
452 | case 'n': | |
453 | no_output = 1; | |
454 | break; | |
455 | case 'd': | |
456 | scan_interval = 1000*atoi(optarg); | |
457 | break; | |
458 | case 't': | |
459 | if (sscanf(optarg, "%d", &time_constant) != 1 || | |
460 | time_constant <= 0) { | |
461 | fprintf(stderr, "rtacct: invalid time constant divisor\n"); | |
462 | exit(-1); | |
463 | } | |
464 | break; | |
465 | case 'v': | |
466 | case 'V': | |
467 | printf("rtacct utility, iproute2-ss%s\n", SNAPSHOT); | |
468 | exit(0); | |
469 | case 'M': | |
470 | /* Some secret undocumented option, nobody | |
471 | * is expected to ask about its sense. See? | |
472 | */ | |
473 | sscanf(optarg, "%lx", &magic_number); | |
474 | break; | |
475 | case 'h': | |
476 | case '?': | |
477 | default: | |
478 | usage(); | |
479 | } | |
480 | } | |
481 | ||
482 | argc -= optind; | |
483 | argv += optind; | |
484 | ||
485 | if (argc) { | |
486 | while (argc > 0) { | |
487 | __u32 realm; | |
acd1e437 | 488 | |
aba5acdf SH |
489 | if (rtnl_rtrealm_a2n(&realm, argv[0])) { |
490 | fprintf(stderr, "Warning: realm \"%s\" does not exist.\n", argv[0]); | |
491 | exit(-1); | |
492 | } | |
493 | rmap[realm>>5] |= (1<<(realm&0x1f)); | |
494 | argc--; argv++; | |
495 | } | |
496 | } else { | |
497 | memset(rmap, ~0, sizeof(rmap)); | |
498 | /* Always suppress zeros. */ | |
499 | dump_zeros = 0; | |
500 | } | |
501 | ||
502 | sun.sun_family = AF_UNIX; | |
503 | sun.sun_path[0] = 0; | |
504 | sprintf(sun.sun_path+1, "rtacct%d", getuid()); | |
505 | ||
506 | if (scan_interval > 0) { | |
507 | if (time_constant == 0) | |
508 | time_constant = 60; | |
509 | time_constant *= 1000; | |
510 | W = 1 - 1/exp(log(10)*(double)scan_interval/time_constant); | |
511 | if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { | |
512 | perror("rtacct: socket"); | |
513 | exit(-1); | |
514 | } | |
acd1e437 | 515 | if (bind(fd, (struct sockaddr *)&sun, 2+1+strlen(sun.sun_path+1)) < 0) { |
aba5acdf SH |
516 | perror("rtacct: bind"); |
517 | exit(-1); | |
518 | } | |
519 | if (listen(fd, 5) < 0) { | |
520 | perror("rtacct: listen"); | |
521 | exit(-1); | |
522 | } | |
a7a9ddbb MF |
523 | if (daemon(0, 0)) { |
524 | perror("rtacct: daemon"); | |
525 | exit(-1); | |
526 | } | |
aba5acdf SH |
527 | signal(SIGPIPE, SIG_IGN); |
528 | signal(SIGCHLD, sigchild); | |
529 | server_loop(fd); | |
530 | exit(0); | |
531 | } | |
532 | ||
533 | if (getenv("RTACCT_HISTORY")) | |
8988b02e | 534 | snprintf(hist_name, sizeof(hist_name), "%s", getenv("RTACCT_HISTORY")); |
aba5acdf SH |
535 | else |
536 | sprintf(hist_name, "/tmp/.rtacct.u%d", getuid()); | |
537 | ||
538 | if (reset_history) | |
539 | unlink(hist_name); | |
540 | ||
541 | if (!ignore_history || !no_update) { | |
542 | struct stat stb; | |
543 | ||
544 | fd = open(hist_name, O_RDWR|O_CREAT|O_NOFOLLOW, 0600); | |
545 | if (fd < 0) { | |
546 | perror("rtacct: open history file"); | |
547 | exit(-1); | |
548 | } | |
549 | if (flock(fd, LOCK_EX)) { | |
550 | perror("rtacct: flock history file"); | |
551 | exit(-1); | |
552 | } | |
553 | if (fstat(fd, &stb) != 0) { | |
554 | perror("rtacct: fstat history file"); | |
555 | exit(-1); | |
556 | } | |
557 | if (stb.st_nlink != 1 || stb.st_uid != getuid()) { | |
558 | fprintf(stderr, "rtacct: something is so wrong with history file, that I prefer not to proceed.\n"); | |
559 | exit(-1); | |
560 | } | |
561 | if (stb.st_size != sizeof(*hist_db)) | |
8988b02e SH |
562 | if (write(fd, kern_db, sizeof(*hist_db)) < 0) { |
563 | perror("rtacct: write history file"); | |
564 | exit(-1); | |
565 | } | |
aba5acdf SH |
566 | |
567 | hist_db = mmap(NULL, sizeof(*hist_db), | |
568 | PROT_READ|PROT_WRITE, | |
569 | no_update ? MAP_PRIVATE : MAP_SHARED, | |
570 | fd, 0); | |
571 | ||
572 | if ((unsigned long)hist_db == ~0UL) { | |
573 | perror("mmap"); | |
574 | exit(-1); | |
575 | } | |
576 | ||
577 | if (!ignore_history) { | |
578 | FILE *tfp; | |
9a230771 | 579 | long uptime = -1; |
acd1e437 | 580 | |
aba5acdf SH |
581 | if ((tfp = fopen("/proc/uptime", "r")) != NULL) { |
582 | if (fscanf(tfp, "%ld", &uptime) != 1) | |
583 | uptime = -1; | |
584 | fclose(tfp); | |
585 | } | |
586 | ||
587 | if (uptime >= 0 && time(NULL) >= stb.st_mtime+uptime) { | |
588 | fprintf(stderr, "rtacct: history is aged out, resetting\n"); | |
589 | memset(hist_db, 0, sizeof(*hist_db)); | |
590 | } | |
591 | } | |
592 | ||
593 | close(fd); | |
594 | } | |
595 | ||
596 | if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) >= 0 && | |
acd1e437 | 597 | (connect(fd, (struct sockaddr *)&sun, 2+1+strlen(sun.sun_path+1)) == 0 |
aba5acdf | 598 | || (strcpy(sun.sun_path+1, "rtacct0"), |
acd1e437 | 599 | connect(fd, (struct sockaddr *)&sun, 2+1+strlen(sun.sun_path+1)) == 0)) |
aba5acdf | 600 | && verify_forging(fd) == 0) { |
acd1e437 | 601 | nread(fd, (char *)kern_db, sizeof(*kern_db)); |
aba5acdf SH |
602 | if (hist_db && hist_db->signature[0] && |
603 | strcmp(kern_db->signature, hist_db->signature)) { | |
604 | fprintf(stderr, "rtacct: history is stale, ignoring it.\n"); | |
605 | hist_db = NULL; | |
606 | } | |
607 | close(fd); | |
608 | } else { | |
609 | if (fd >= 0) | |
610 | close(fd); | |
611 | ||
612 | if (hist_db && hist_db->signature[0] && | |
613 | strcmp(hist_db->signature, "kernel")) { | |
614 | fprintf(stderr, "rtacct: history is stale, ignoring it.\n"); | |
615 | hist_db = NULL; | |
616 | } | |
617 | ||
618 | pad_kern_table(kern_db, read_kern_table(kern_db->ival)); | |
619 | strcpy(kern_db->signature, "kernel"); | |
620 | } | |
621 | ||
622 | if (ignore_history || hist_db == NULL) | |
623 | dump_abs_db(stdout); | |
624 | else | |
625 | dump_incr_db(stdout); | |
626 | ||
627 | exit(0); | |
628 | } |