]>
Commit | Line | Data |
---|---|---|
a74aeac6 PR |
1 | /* |
2 | * bootlogd.c Store output from the console during bootup into a file. | |
3 | * The file is usually located on the /var partition, and | |
4 | * gets written (and fsynced) as soon as possible. | |
5 | * | |
6 | * Version: @(#)bootlogd 2.86pre 12-Jan-2004 miquels@cistron.nl | |
7 | * | |
8 | * Bugs: Uses openpty(), only available in glibc. Sorry. | |
9 | * | |
10 | * This file is part of the sysvinit suite, | |
11 | * Copyright (C) 1991-2004 Miquel van Smoorenburg. | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
26 | * | |
27 | * *NOTE* *NOTE* *NOTE* | |
28 | * This is a PROOF OF CONCEPT IMPLEMENTATION | |
29 | * | |
30 | * I have bigger plans for Debian, but for now | |
31 | * this has to do ;) | |
32 | * | |
33 | */ | |
34 | ||
35 | #include <sys/types.h> | |
36 | #include <sys/time.h> | |
37 | #include <sys/stat.h> | |
38 | #include <sys/ioctl.h> | |
39 | #include <sys/utsname.h> | |
40 | #include <time.h> | |
41 | #include <stdio.h> | |
42 | #include <errno.h> | |
43 | #include <malloc.h> | |
44 | #include <stdlib.h> | |
45 | #include <unistd.h> | |
46 | #include <string.h> | |
47 | #include <signal.h> | |
48 | #include <getopt.h> | |
49 | #include <dirent.h> | |
50 | #include <fcntl.h> | |
51 | #include <pty.h> | |
52 | #include <ctype.h> | |
53 | #ifdef __linux__ | |
54 | #include <sys/mount.h> | |
55 | #endif | |
56 | ||
57 | char *Version = "@(#) bootlogd 2.86 03-Jun-2004 miquels@cistron.nl"; | |
58 | ||
59 | #define LOGFILE "/var/log/boot" | |
60 | ||
61 | char ringbuf[32768]; | |
62 | char *endptr = ringbuf + sizeof(ringbuf); | |
63 | char *inptr = ringbuf; | |
64 | char *outptr = ringbuf; | |
65 | ||
66 | int got_signal = 0; | |
67 | int didnl = 1; | |
68 | int createlogfile = 0; | |
69 | int syncalot = 0; | |
70 | ||
71 | struct line { | |
72 | char buf[256]; | |
73 | int pos; | |
74 | } line; | |
75 | ||
76 | /* | |
77 | * Console devices as listed on the kernel command line and | |
78 | * the mapping to actual devices in /dev | |
79 | */ | |
80 | struct consdev { | |
81 | char *cmdline; | |
82 | char *dev1; | |
83 | char *dev2; | |
84 | } consdev[] = { | |
85 | { "ttyB", "/dev/ttyB%s", NULL }, | |
86 | { "ttySC", "/dev/ttySC%s", "/dev/ttsc/%s" }, | |
87 | { "ttyS", "/dev/ttyS%s", "/dev/tts/%s" }, | |
88 | { "tty", "/dev/tty%s", "/dev/vc/%s" }, | |
89 | { "hvc", "/dev/hvc%s", "/dev/hvc/%s" }, | |
90 | { NULL, NULL, NULL }, | |
91 | }; | |
92 | ||
93 | /* | |
94 | * Devices to try as console if not found on kernel command line. | |
95 | * Tried from left to right (as opposed to kernel cmdline). | |
96 | */ | |
97 | char *defcons[] = { "tty0", "hvc0", "ttyS0", "ttySC0", "ttyB0", NULL }; | |
98 | ||
99 | /* | |
100 | * Catch signals. | |
101 | */ | |
102 | void handler(int sig) | |
103 | { | |
104 | got_signal = sig; | |
105 | } | |
106 | ||
107 | ||
108 | /* | |
109 | * Scan /dev and find the device name. | |
a74aeac6 | 110 | */ |
2a6ee3ef | 111 | static int findtty(char *res, const char *startdir, int rlen, dev_t dev) |
a74aeac6 PR |
112 | { |
113 | DIR *dir; | |
114 | struct dirent *ent; | |
115 | struct stat st; | |
29ed3b1d PR |
116 | int r = -1; |
117 | char *olddir = getcwd(NULL, 0); | |
a74aeac6 | 118 | |
29ed3b1d PR |
119 | if (chdir(startdir) < 0 || (dir = opendir(".")) == NULL) { |
120 | int msglen = strlen(startdir) + 11; | |
121 | char *msg = malloc(msglen); | |
122 | snprintf(msg, msglen, "bootlogd: %s", startdir); | |
123 | perror(msg); | |
124 | free(msg); | |
125 | chdir(olddir); | |
a74aeac6 PR |
126 | return -1; |
127 | } | |
128 | while ((ent = readdir(dir)) != NULL) { | |
129 | if (lstat(ent->d_name, &st) != 0) | |
130 | continue; | |
29ed3b1d PR |
131 | if (S_ISDIR(st.st_mode) |
132 | && 0 != strcmp(".", ent->d_name) | |
133 | && 0 != strcmp("..", ent->d_name)) { | |
134 | char *path = malloc(rlen); | |
135 | snprintf(path, rlen, "%s/%s", startdir, ent->d_name); | |
136 | r = findtty(res, path, rlen, dev); | |
137 | free(path); | |
138 | if (0 == r) { /* device found, return */ | |
139 | closedir(dir); | |
140 | chdir(olddir); | |
141 | return 0; | |
142 | } | |
143 | continue; | |
144 | } | |
a74aeac6 PR |
145 | if (!S_ISCHR(st.st_mode)) |
146 | continue; | |
147 | if (st.st_rdev == dev) { | |
d7e3d0d8 | 148 | if ( (int) (strlen(ent->d_name) + strlen(startdir) + 1) >= rlen) { |
29ed3b1d PR |
149 | fprintf(stderr, "bootlogd: console device name too long\n"); |
150 | closedir(dir); | |
151 | chdir(olddir); | |
152 | return -1; | |
153 | } else { | |
154 | snprintf(res, rlen, "%s/%s", startdir, ent->d_name); | |
155 | closedir(dir); | |
156 | chdir(olddir); | |
157 | return 0; | |
158 | } | |
a74aeac6 PR |
159 | } |
160 | } | |
a74aeac6 PR |
161 | closedir(dir); |
162 | ||
29ed3b1d | 163 | chdir(olddir); |
a74aeac6 PR |
164 | return r; |
165 | } | |
166 | ||
167 | /* | |
168 | * For some reason, openpty() in glibc sometimes doesn't | |
169 | * work at boot-time. It must be a bug with old-style pty | |
170 | * names, as new-style (/dev/pts) is not available at that | |
171 | * point. So, we find a pty/tty pair ourself if openpty() | |
172 | * fails for whatever reason. | |
173 | */ | |
174 | int findpty(int *master, int *slave, char *name) | |
175 | { | |
176 | char pty[16]; | |
177 | char tty[16]; | |
178 | int i, j; | |
179 | int found; | |
180 | ||
181 | if (openpty(master, slave, name, NULL, NULL) >= 0) | |
182 | return 0; | |
183 | ||
184 | found = 0; | |
185 | ||
186 | for (i = 'p'; i <= 'z'; i++) { | |
187 | for (j = '0'; j <= 'f'; j++) { | |
188 | if (j == '9' + 1) j = 'a'; | |
189 | sprintf(pty, "/dev/pty%c%c", i, j); | |
190 | sprintf(tty, "/dev/tty%c%c", i, j); | |
191 | if ((*master = open(pty, O_RDWR|O_NOCTTY)) >= 0) { | |
192 | *slave = open(tty, O_RDWR|O_NOCTTY); | |
193 | if (*slave >= 0) { | |
194 | found = 1; | |
195 | break; | |
196 | } | |
197 | } | |
198 | } | |
199 | if (found) break; | |
200 | } | |
81bc7c8e | 201 | if (!found) return -1; |
a74aeac6 PR |
202 | |
203 | if (name) strcpy(name, tty); | |
204 | ||
205 | return 0; | |
206 | } | |
207 | /* | |
208 | * See if a console taken from the kernel command line maps | |
209 | * to a character device we know about, and if we can open it. | |
210 | */ | |
211 | int isconsole(char *s, char *res, int rlen) | |
212 | { | |
213 | struct consdev *c; | |
214 | int l, sl, i, fd; | |
215 | char *p, *q; | |
216 | ||
217 | sl = strlen(s); | |
218 | ||
219 | for (c = consdev; c->cmdline; c++) { | |
220 | l = strlen(c->cmdline); | |
221 | if (sl <= l) continue; | |
222 | p = s + l; | |
223 | if (strncmp(s, c->cmdline, l) != 0 || !isdigit(*p)) | |
224 | continue; | |
225 | for (i = 0; i < 2; i++) { | |
226 | snprintf(res, rlen, i ? c->dev1 : c->dev2, p); | |
227 | if ((q = strchr(res, ',')) != NULL) *q = 0; | |
228 | if ((fd = open(res, O_RDONLY|O_NONBLOCK)) >= 0) { | |
229 | close(fd); | |
230 | return 1; | |
231 | } | |
232 | } | |
233 | } | |
234 | return 0; | |
235 | } | |
236 | ||
237 | /* | |
238 | * Find out the _real_ console. Assume that stdin is connected to | |
239 | * the console device (/dev/console). | |
240 | */ | |
241 | int consolename(char *res, int rlen) | |
242 | { | |
243 | #ifdef TIOCGDEV | |
244 | unsigned int kdev; | |
245 | #endif | |
246 | struct stat st, st2; | |
247 | char buf[256]; | |
248 | char *p; | |
249 | int didmount = 0; | |
250 | int n, r; | |
251 | int fd; | |
252 | ||
253 | fstat(0, &st); | |
254 | if (major(st.st_rdev) != 5 || minor(st.st_rdev) != 1) { | |
255 | /* | |
256 | * Old kernel, can find real device easily. | |
257 | */ | |
29ed3b1d PR |
258 | int r = findtty(res, "/dev", rlen, st.st_rdev); |
259 | if (0 != r) | |
260 | fprintf(stderr, "bootlogd: cannot find console device " | |
261 | "%d:%d under /dev\n", major(st.st_rdev), minor(st.st_rdev)); | |
262 | return r; | |
a74aeac6 PR |
263 | } |
264 | ||
265 | #ifdef TIOCGDEV | |
29ed3b1d PR |
266 | if (ioctl(0, TIOCGDEV, &kdev) == 0) { |
267 | int r = findtty(res, "/dev", rlen, (dev_t)kdev); | |
268 | if (0 != r) | |
269 | fprintf(stderr, "bootlogd: cannot find console device " | |
270 | "%d:%d under /dev\n", major(kdev), minor(kdev)); | |
271 | return r; | |
272 | } | |
a74aeac6 PR |
273 | if (errno != ENOIOCTLCMD) return -1; |
274 | #endif | |
275 | ||
276 | #ifdef __linux__ | |
277 | /* | |
278 | * Read /proc/cmdline. | |
279 | */ | |
280 | stat("/", &st); | |
281 | if (stat("/proc", &st2) < 0) { | |
282 | perror("bootlogd: /proc"); | |
283 | return -1; | |
284 | } | |
285 | if (st.st_dev == st2.st_dev) { | |
286 | if (mount("proc", "/proc", "proc", 0, NULL) < 0) { | |
287 | perror("bootlogd: mount /proc"); | |
288 | return -1; | |
289 | } | |
290 | didmount = 1; | |
291 | } | |
292 | ||
293 | n = 0; | |
294 | r = -1; | |
295 | if ((fd = open("/proc/cmdline", O_RDONLY)) < 0) { | |
296 | perror("bootlogd: /proc/cmdline"); | |
297 | } else { | |
298 | buf[0] = 0; | |
299 | if ((n = read(fd, buf, sizeof(buf) - 1)) >= 0) | |
300 | r = 0; | |
301 | else | |
302 | perror("bootlogd: /proc/cmdline"); | |
303 | close(fd); | |
304 | } | |
305 | if (didmount) umount("/proc"); | |
306 | ||
307 | if (r < 0) return r; | |
308 | ||
309 | /* | |
310 | * OK, so find console= in /proc/cmdline. | |
311 | * Parse in reverse, opening as we go. | |
312 | */ | |
313 | p = buf + n; | |
314 | *p-- = 0; | |
315 | r = -1; | |
316 | while (p >= buf) { | |
317 | if (*p == ' ' || *p == '\t' || *p == '\r' || *p == '\n') { | |
318 | *p-- = 0; | |
319 | continue; | |
320 | } | |
321 | if (strncmp(p, "console=", 8) == 0 && | |
322 | isconsole(p + 8, res, rlen)) { | |
323 | r = 0; | |
324 | break; | |
325 | } | |
326 | p--; | |
327 | } | |
328 | ||
329 | if (r == 0) return r; | |
330 | #endif | |
331 | ||
332 | /* | |
333 | * Okay, no console on the command line - | |
334 | * guess the default console. | |
335 | */ | |
336 | for (n = 0; defcons[n]; n++) | |
337 | if (isconsole(defcons[n], res, rlen)) | |
338 | return 0; | |
339 | ||
340 | fprintf(stderr, "bootlogd: cannot deduce real console device\n"); | |
341 | ||
342 | return -1; | |
343 | } | |
344 | ||
345 | ||
346 | /* | |
347 | * Write data and make sure it's on disk. | |
348 | */ | |
349 | void writelog(FILE *fp, unsigned char *ptr, int len) | |
350 | { | |
351 | time_t t; | |
352 | char *s; | |
353 | char tmp[8]; | |
354 | int olen = len; | |
355 | int dosync = 0; | |
356 | int tlen; | |
357 | ||
358 | while (len > 0) { | |
359 | tmp[0] = 0; | |
360 | if (didnl) { | |
361 | time(&t); | |
362 | s = ctime(&t); | |
363 | fprintf(fp, "%.24s: ", s); | |
364 | didnl = 0; | |
365 | } | |
366 | switch (*ptr) { | |
367 | case 27: /* ESC */ | |
368 | strcpy(tmp, "^["); | |
369 | break; | |
370 | case '\r': | |
371 | line.pos = 0; | |
372 | break; | |
373 | case 8: /* ^H */ | |
374 | if (line.pos > 0) line.pos--; | |
375 | break; | |
376 | case '\n': | |
377 | didnl = 1; | |
54e00d41 | 378 | dosync = 1; |
a74aeac6 PR |
379 | break; |
380 | case '\t': | |
381 | line.pos += (line.pos / 8 + 1) * 8; | |
192c4567 | 382 | if (line.pos >= (int)sizeof(line.buf)) |
a74aeac6 PR |
383 | line.pos = sizeof(line.buf) - 1; |
384 | break; | |
385 | case 32 ... 127: | |
386 | case 161 ... 255: | |
387 | tmp[0] = *ptr; | |
388 | tmp[1] = 0; | |
389 | break; | |
390 | default: | |
391 | sprintf(tmp, "\\%03o", *ptr); | |
392 | break; | |
393 | } | |
394 | ptr++; | |
395 | len--; | |
396 | ||
397 | tlen = strlen(tmp); | |
192c4567 | 398 | if (tlen && (line.pos + tlen < (int)sizeof(line.buf))) { |
a74aeac6 PR |
399 | memcpy(line.buf + line.pos, tmp, tlen); |
400 | line.pos += tlen; | |
401 | } | |
402 | if (didnl) { | |
403 | fprintf(fp, "%s\n", line.buf); | |
404 | memset(&line, 0, sizeof(line)); | |
405 | } | |
406 | } | |
407 | ||
408 | if (dosync) { | |
409 | fflush(fp); | |
54e00d41 PR |
410 | if (syncalot) { |
411 | fdatasync(fileno(fp)); | |
412 | } | |
a74aeac6 PR |
413 | } |
414 | ||
415 | outptr += olen; | |
416 | if (outptr >= endptr) | |
417 | outptr = ringbuf; | |
418 | ||
419 | } | |
420 | ||
421 | ||
422 | /* | |
423 | * Print usage message and exit. | |
424 | */ | |
425 | void usage(void) | |
426 | { | |
427 | fprintf(stderr, "Usage: bootlogd [-v] [-r] [-d] [-s] [-c] [-p pidfile] [-l logfile]\n"); | |
428 | exit(1); | |
429 | } | |
430 | ||
431 | int open_nb(char *buf) | |
432 | { | |
433 | int fd, n; | |
434 | ||
435 | if ((fd = open(buf, O_WRONLY|O_NONBLOCK|O_NOCTTY)) < 0) | |
436 | return -1; | |
437 | n = fcntl(fd, F_GETFL); | |
438 | n &= ~(O_NONBLOCK); | |
439 | fcntl(fd, F_SETFL, n); | |
440 | ||
441 | return fd; | |
442 | } | |
443 | ||
444 | /* | |
445 | * We got a write error on the real console. If its an EIO, | |
446 | * somebody hung up our filedescriptor, so try to re-open it. | |
447 | */ | |
448 | int write_err(int pts, int realfd, char *realcons, int e) | |
449 | { | |
450 | int fd; | |
451 | ||
452 | if (e != EIO) { | |
453 | werr: | |
454 | close(pts); | |
455 | fprintf(stderr, "bootlogd: writing to console: %s\n", | |
456 | strerror(e)); | |
457 | return -1; | |
458 | } | |
459 | close(realfd); | |
460 | if ((fd = open_nb(realcons)) < 0) | |
461 | goto werr; | |
462 | ||
463 | return fd; | |
464 | } | |
465 | ||
466 | int main(int argc, char **argv) | |
467 | { | |
468 | FILE *fp; | |
469 | struct timeval tv; | |
470 | fd_set fds; | |
471 | char buf[1024]; | |
472 | char realcons[1024]; | |
473 | char *p; | |
474 | char *logfile; | |
475 | char *pidfile; | |
476 | int rotate; | |
477 | int dontfork; | |
478 | int ptm, pts; | |
479 | int realfd; | |
480 | int n, m, i; | |
481 | int todo; | |
482 | ||
483 | fp = NULL; | |
484 | logfile = LOGFILE; | |
485 | pidfile = NULL; | |
486 | rotate = 0; | |
487 | dontfork = 0; | |
488 | ||
489 | while ((i = getopt(argc, argv, "cdsl:p:rv")) != EOF) switch(i) { | |
490 | case 'l': | |
491 | logfile = optarg; | |
492 | break; | |
493 | case 'r': | |
494 | rotate = 1; | |
495 | break; | |
496 | case 'v': | |
497 | printf("%s\n", Version); | |
498 | exit(0); | |
499 | break; | |
500 | case 'p': | |
501 | pidfile = optarg; | |
502 | break; | |
503 | case 'c': | |
504 | createlogfile = 1; | |
505 | break; | |
506 | case 'd': | |
507 | dontfork = 1; | |
508 | break; | |
509 | case 's': | |
510 | syncalot = 1; | |
511 | break; | |
512 | default: | |
513 | usage(); | |
514 | break; | |
515 | } | |
516 | if (optind < argc) usage(); | |
517 | ||
518 | signal(SIGTERM, handler); | |
519 | signal(SIGQUIT, handler); | |
520 | signal(SIGINT, handler); | |
521 | signal(SIGTTIN, SIG_IGN); | |
522 | signal(SIGTTOU, SIG_IGN); | |
523 | signal(SIGTSTP, SIG_IGN); | |
524 | ||
525 | /* | |
526 | * Open console device directly. | |
527 | */ | |
528 | if (consolename(realcons, sizeof(realcons)) < 0) | |
529 | return 1; | |
530 | ||
531 | if (strcmp(realcons, "/dev/tty0") == 0) | |
532 | strcpy(realcons, "/dev/tty1"); | |
533 | if (strcmp(realcons, "/dev/vc/0") == 0) | |
534 | strcpy(realcons, "/dev/vc/1"); | |
535 | ||
536 | if ((realfd = open_nb(realcons)) < 0) { | |
537 | fprintf(stderr, "bootlogd: %s: %s\n", buf, strerror(errno)); | |
538 | return 1; | |
539 | } | |
540 | ||
541 | /* | |
542 | * Grab a pty, and redirect console messages to it. | |
543 | */ | |
544 | ptm = -1; | |
545 | pts = -1; | |
546 | buf[0] = 0; | |
547 | if (findpty(&ptm, &pts, buf) < 0) { | |
548 | fprintf(stderr, | |
549 | "bootlogd: cannot allocate pseudo tty: %s\n", | |
550 | strerror(errno)); | |
551 | return 1; | |
552 | } | |
553 | ||
554 | (void)ioctl(0, TIOCCONS, NULL); | |
555 | #if 1 | |
556 | /* Work around bug in 2.1/2.2 kernels. Fixed in 2.2.13 and 2.3.18 */ | |
557 | if ((n = open("/dev/tty0", O_RDWR)) >= 0) { | |
558 | (void)ioctl(n, TIOCCONS, NULL); | |
559 | close(n); | |
560 | } | |
561 | #endif | |
562 | if (ioctl(pts, TIOCCONS, NULL) < 0) { | |
563 | fprintf(stderr, "bootlogd: ioctl(%s, TIOCCONS): %s\n", | |
564 | buf, strerror(errno)); | |
565 | return 1; | |
566 | } | |
567 | ||
568 | /* | |
569 | * Fork and write pidfile if needed. | |
570 | */ | |
571 | if (!dontfork) { | |
572 | pid_t child_pid = fork(); | |
573 | switch (child_pid) { | |
574 | case -1: /* I am parent and the attempt to create a child failed */ | |
575 | fprintf(stderr, "bootlogd: fork failed: %s\n", | |
576 | strerror(errno)); | |
577 | exit(1); | |
578 | break; | |
579 | case 0: /* I am the child */ | |
580 | break; | |
581 | default: /* I am parent and got child's pid */ | |
582 | exit(0); | |
583 | break; | |
584 | } | |
585 | setsid(); | |
586 | } | |
587 | if (pidfile) { | |
588 | unlink(pidfile); | |
589 | if ((fp = fopen(pidfile, "w")) != NULL) { | |
590 | fprintf(fp, "%d\n", (int)getpid()); | |
591 | fclose(fp); | |
592 | } | |
593 | fp = NULL; | |
594 | } | |
595 | ||
596 | /* | |
597 | * Read the console messages from the pty, and write | |
598 | * to the real console and the logfile. | |
599 | */ | |
600 | while (!got_signal) { | |
601 | ||
602 | /* | |
603 | * We timeout after 5 seconds if we still need to | |
604 | * open the logfile. There might be buffered messages | |
605 | * we want to write. | |
606 | */ | |
607 | tv.tv_sec = 0; | |
608 | tv.tv_usec = 500000; | |
609 | FD_ZERO(&fds); | |
610 | FD_SET(ptm, &fds); | |
611 | if (select(ptm + 1, &fds, NULL, NULL, &tv) == 1) { | |
612 | /* | |
613 | * See how much space there is left, read. | |
614 | */ | |
615 | if ((n = read(ptm, inptr, endptr - inptr)) >= 0) { | |
616 | /* | |
617 | * Write data (in chunks if needed) | |
618 | * to the real output device. | |
619 | */ | |
620 | m = n; | |
621 | p = inptr; | |
622 | while (m > 0) { | |
623 | i = write(realfd, p, m); | |
624 | if (i >= 0) { | |
625 | m -= i; | |
626 | p += i; | |
627 | continue; | |
628 | } | |
629 | /* | |
630 | * Handle EIO (somebody hung | |
631 | * up our filedescriptor) | |
632 | */ | |
633 | realfd = write_err(pts, realfd, | |
634 | realcons, errno); | |
635 | if (realfd >= 0) continue; | |
636 | got_signal = 1; /* Not really */ | |
637 | break; | |
638 | } | |
639 | ||
640 | /* | |
641 | * Increment buffer position. Handle | |
642 | * wraps, and also drag output pointer | |
643 | * along if we cross it. | |
644 | */ | |
645 | inptr += n; | |
646 | if (inptr - n < outptr && inptr > outptr) | |
647 | outptr = inptr; | |
648 | if (inptr >= endptr) | |
649 | inptr = ringbuf; | |
650 | if (outptr >= endptr) | |
651 | outptr = ringbuf; | |
652 | } | |
653 | } | |
654 | ||
655 | /* | |
656 | * Perhaps we need to open the logfile. | |
657 | */ | |
658 | if (fp == NULL && access(logfile, F_OK) == 0) { | |
659 | if (rotate) { | |
660 | snprintf(buf, sizeof(buf), "%s~", logfile); | |
661 | rename(logfile, buf); | |
662 | } | |
663 | fp = fopen(logfile, "a"); | |
664 | } | |
665 | if (fp == NULL && createlogfile) | |
666 | fp = fopen(logfile, "a"); | |
667 | ||
668 | if (inptr >= outptr) | |
669 | todo = inptr - outptr; | |
670 | else | |
671 | todo = endptr - outptr; | |
672 | if (fp && todo) | |
192c4567 | 673 | writelog(fp, (unsigned char *)outptr, todo); |
a74aeac6 PR |
674 | } |
675 | ||
676 | if (fp) { | |
677 | if (!didnl) fputc('\n', fp); | |
678 | fclose(fp); | |
679 | } | |
680 | ||
681 | close(pts); | |
682 | close(ptm); | |
683 | close(realfd); | |
684 | ||
685 | return 0; | |
686 | } | |
687 |