newsyslog.c revision 136174
1/*-
2 * ------+---------+---------+-------- + --------+---------+---------+---------*
3 * This file includes significant modifications done by:
4 * Copyright (c) 2003, 2004  - Garance Alistair Drosehn <gad@FreeBSD.org>.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *   1. Redistributions of source code must retain the above copyright
11 *      notice, this list of conditions and the following disclaimer.
12 *   2. Redistributions in binary form must reproduce the above copyright
13 *      notice, this list of conditions and the following disclaimer in the
14 *      documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * ------+---------+---------+-------- + --------+---------+---------+---------*
29 */
30
31/*
32 * This file contains changes from the Open Software Foundation.
33 */
34
35/*
36 * Copyright 1988, 1989 by the Massachusetts Institute of Technology
37 *
38 * Permission to use, copy, modify, and distribute this software and its
39 * documentation for any purpose and without fee is hereby granted, provided
40 * that the above copyright notice appear in all copies and that both that
41 * copyright notice and this permission notice appear in supporting
42 * documentation, and that the names of M.I.T. and the M.I.T. S.I.P.B. not be
43 * used in advertising or publicity pertaining to distribution of the
44 * software without specific, written prior permission. M.I.T. and the M.I.T.
45 * S.I.P.B. make no representations about the suitability of this software
46 * for any purpose.  It is provided "as is" without express or implied
47 * warranty.
48 *
49 */
50
51/*
52 * newsyslog - roll over selected logs at the appropriate time, keeping the a
53 * specified number of backup files around.
54 */
55
56#include <sys/cdefs.h>
57__FBSDID("$FreeBSD: head/usr.sbin/newsyslog/newsyslog.c 136174 2004-10-05 22:16:31Z brooks $");
58
59#define	OSF
60#ifndef COMPRESS_POSTFIX
61#define	COMPRESS_POSTFIX ".gz"
62#endif
63#ifndef	BZCOMPRESS_POSTFIX
64#define	BZCOMPRESS_POSTFIX ".bz2"
65#endif
66
67#include <sys/param.h>
68#include <sys/queue.h>
69#include <sys/stat.h>
70#include <sys/wait.h>
71
72#include <ctype.h>
73#include <err.h>
74#include <errno.h>
75#include <fcntl.h>
76#include <fnmatch.h>
77#include <glob.h>
78#include <grp.h>
79#include <paths.h>
80#include <pwd.h>
81#include <signal.h>
82#include <stdio.h>
83#include <stdlib.h>
84#include <string.h>
85#include <time.h>
86#include <unistd.h>
87
88#include "pathnames.h"
89#include "extern.h"
90
91/* Define this symbol to try out the "new order" for work items. */
92#define	TRY_NEWORDER
93#ifndef USE_NEWORDER
94#define	USE_NEWORDER	1	/* Initial value for dbg_new_order */
95#endif
96
97/*
98 * Bit-values for the 'flags' parsed from a config-file entry.
99 */
100#define	CE_COMPACT	0x0001	/* Compact the achived log files with gzip. */
101#define	CE_BZCOMPACT	0x0002	/* Compact the achived log files with bzip2. */
102#define	CE_COMPACTWAIT	0x0004	/* wait until compressing one file finishes */
103				/*    before starting the next step. */
104#define	CE_BINARY	0x0008	/* Logfile is in binary, do not add status */
105				/*    messages to logfile(s) when rotating. */
106#define	CE_NOSIGNAL	0x0010	/* There is no process to signal when */
107				/*    trimming this file. */
108#define	CE_TRIMAT	0x0020	/* trim file at a specific time. */
109#define	CE_GLOB		0x0040	/* name of the log is file name pattern. */
110#define	CE_SIGNALGROUP	0x0080	/* Signal a process-group instead of a single */
111				/*    process when trimming this file. */
112#define	CE_CREATE	0x0100	/* Create the log file if it does not exist. */
113#define	CE_NODUMP	0x0200	/* Set 'nodump' on newly created log file. */
114
115#define	MIN_PID         5	/* Don't touch pids lower than this */
116#define	MAX_PID		99999	/* was lower, see /usr/include/sys/proc.h */
117
118#define	kbytes(size)  (((size) + 1023) >> 10)
119
120#define	DEFAULT_MARKER	"<default>"
121#define	DEBUG_MARKER	"<debug>"
122
123struct conf_entry {
124	char *log;		/* Name of the log */
125	char *pid_file;		/* PID file */
126	char *r_reason;		/* The reason this file is being rotated */
127	int firstcreate;	/* Creating log for the first time (-C). */
128	int rotate;		/* Non-zero if this file should be rotated */
129	int fsize;		/* size found for the log file */
130	uid_t uid;		/* Owner of log */
131	gid_t gid;		/* Group of log */
132	int numlogs;		/* Number of logs to keep */
133	int trsize;		/* Size cutoff to trigger trimming the log */
134	int hours;		/* Hours between log trimming */
135	struct ptime_data *trim_at;	/* Specific time to do trimming */
136	int permissions;	/* File permissions on the log */
137	int flags;		/* CE_COMPACT, CE_BZCOMPACT, CE_BINARY */
138	int sig;		/* Signal to send */
139	int def_cfg;		/* Using the <default> rule for this file */
140	struct conf_entry *next;/* Linked list pointer */
141};
142
143struct sigwork_entry {
144	SLIST_ENTRY(sigwork_entry) sw_nextp;
145	int	 sw_signum;		/* the signal to send */
146	int	 sw_pidok;		/* true if pid value is valid */
147	pid_t	 sw_pid;		/* the process id from the PID file */
148	const char *sw_pidtype;		/* "daemon" or "process group" */
149	char	 sw_fname[1];		/* file the PID was read from */
150};
151
152struct zipwork_entry {
153	SLIST_ENTRY(zipwork_entry) zw_nextp;
154	const struct conf_entry *zw_conf;	/* for chown/perm/flag info */
155	const struct sigwork_entry *zw_swork;	/* to know success of signal */
156	int	 zw_fsize;		/* size of the file to compress */
157	char	 zw_fname[1];		/* the file to compress */
158};
159
160typedef enum {
161	FREE_ENT, KEEP_ENT
162}	fk_entry;
163
164SLIST_HEAD(swlisthead, sigwork_entry) swhead = SLIST_HEAD_INITIALIZER(swhead);
165SLIST_HEAD(zwlisthead, zipwork_entry) zwhead = SLIST_HEAD_INITIALIZER(zwhead);
166
167int dbg_at_times;		/* -D Show details of 'trim_at' code */
168/*
169 * The debug options "neworder" and "oldorder" can be used to change
170 * which order work is done in.  Note that both options will disappear
171 * in the near future, and the "new" order will be the only order.
172 */
173int dbg_new_order = USE_NEWORDER;
174
175int archtodir = 0;		/* Archive old logfiles to other directory */
176int createlogs;			/* Create (non-GLOB) logfiles which do not */
177				/*    already exist.  1=='for entries with */
178				/*    C flag', 2=='for all entries'. */
179int verbose = 0;		/* Print out what's going on */
180int needroot = 1;		/* Root privs are necessary */
181int noaction = 0;		/* Don't do anything, just show it */
182int nosignal;			/* Do not send any signals */
183int force = 0;			/* Force the trim no matter what */
184int rotatereq = 0;		/* -R = Always rotate the file(s) as given */
185				/*    on the command (this also requires   */
186				/*    that a list of files *are* given on  */
187				/*    the run command). */
188char *requestor;		/* The name given on a -R request */
189char *archdirname;		/* Directory path to old logfiles archive */
190char *destdir = NULL;		/* Directory to treat at root for logs */
191const char *conf;		/* Configuration file to use */
192
193struct ptime_data *dbg_timenow;	/* A "timenow" value set via -D option */
194struct ptime_data *timenow;	/* The time to use for checking at-fields */
195
196char hostname[MAXHOSTNAMELEN];	/* hostname */
197char daytime[16];		/* The current time in human readable form,
198				 * used for rotation-tracking messages. */
199
200static struct conf_entry *get_worklist(char **files);
201static void parse_file(FILE *cf, const char *cfname, struct conf_entry **work_p,
202		struct conf_entry **glob_p, struct conf_entry **defconf_p);
203static char *sob(char *p);
204static char *son(char *p);
205static int isnumberstr(const char *);
206static char *missing_field(char *p, char *errline);
207static void	 change_attrs(const char *, const struct conf_entry *);
208static fk_entry	 do_entry(struct conf_entry *);
209static fk_entry	 do_rotate(const struct conf_entry *);
210#ifdef TRY_NEWORDER
211static void	 do_sigwork(struct sigwork_entry *);
212static void	 do_zipwork(struct zipwork_entry *);
213static struct sigwork_entry *
214		 save_sigwork(const struct conf_entry *);
215static struct zipwork_entry *
216		 save_zipwork(const struct conf_entry *, const struct
217		    sigwork_entry *, int, const char *);
218static void	 set_swpid(struct sigwork_entry *, const struct conf_entry *);
219#endif
220static int	 sizefile(const char *);
221static void expand_globs(struct conf_entry **work_p,
222		struct conf_entry **glob_p);
223static void free_clist(struct conf_entry **firstent);
224static void free_entry(struct conf_entry *ent);
225static struct conf_entry *init_entry(const char *fname,
226		struct conf_entry *src_entry);
227static void parse_args(int argc, char **argv);
228static int parse_doption(const char *doption);
229static void usage(void);
230static int log_trim(const char *logname, const struct conf_entry *log_ent);
231static void compress_log(char *logname, int dowait);
232static void bzcompress_log(char *logname, int dowait);
233static int age_old_log(char *file);
234static int send_signal(const struct conf_entry *ent);
235static void savelog(char *from, char *to);
236static void createdir(const struct conf_entry *ent, char *dirpart);
237static void createlog(const struct conf_entry *ent);
238
239/*
240 * All the following take a parameter of 'int', but expect values in the
241 * range of unsigned char.  Define wrappers which take values of type 'char',
242 * whether signed or unsigned, and ensure they end up in the right range.
243 */
244#define	isdigitch(Anychar) isdigit((u_char)(Anychar))
245#define	isprintch(Anychar) isprint((u_char)(Anychar))
246#define	isspacech(Anychar) isspace((u_char)(Anychar))
247#define	tolowerch(Anychar) tolower((u_char)(Anychar))
248
249int
250main(int argc, char **argv)
251{
252	fk_entry free_or_keep;
253	struct conf_entry *p, *q;
254#ifdef TRY_NEWORDER
255	struct sigwork_entry *stmp;
256	struct zipwork_entry *ztmp;
257#endif
258
259	SLIST_INIT(&swhead);
260	SLIST_INIT(&zwhead);
261
262	parse_args(argc, argv);
263	argc -= optind;
264	argv += optind;
265
266	if (needroot && getuid() && geteuid())
267		errx(1, "must have root privs");
268	p = q = get_worklist(argv);
269
270	/*
271	 * Rotate all the files which need to be rotated.  Note that
272	 * some users have *hundreds* of entries in newsyslog.conf!
273	 */
274	while (p) {
275		free_or_keep = do_entry(p);
276		p = p->next;
277		if (free_or_keep == FREE_ENT)
278			free_entry(q);
279		q = p;
280	}
281
282#ifdef TRY_NEWORDER
283	/*
284	 * Send signals to any processes which need a signal to tell
285	 * them to close and re-open the log file(s) we have rotated.
286	 * Note that zipwork_entries include pointers to these
287	 * sigwork_entry's, so we can not free the entries here.
288	 */
289	if (!SLIST_EMPTY(&swhead)) {
290		if (noaction || verbose)
291			printf("Signal all daemon process(es)...\n");
292		SLIST_FOREACH(stmp, &swhead, sw_nextp)
293			do_sigwork(stmp);
294		if (noaction)
295			printf("\tsleep 10\n");
296		else {
297			if (verbose)
298				printf("Pause 10 seconds to allow daemon(s)"
299				    " to close log file(s)\n");
300			sleep(10);
301		}
302	}
303	/*
304	 * Compress all files that we're expected to compress, now
305	 * that all processes should have closed the files which
306	 * have been rotated.
307	 */
308	if (!SLIST_EMPTY(&zwhead)) {
309		if (noaction || verbose)
310			printf("Compress all rotated log file(s)...\n");
311		while (!SLIST_EMPTY(&zwhead)) {
312			ztmp = SLIST_FIRST(&zwhead);
313			do_zipwork(ztmp);
314			SLIST_REMOVE_HEAD(&zwhead, zw_nextp);
315			free(ztmp);
316		}
317	}
318	/* Now free all the sigwork entries. */
319	while (!SLIST_EMPTY(&swhead)) {
320		stmp = SLIST_FIRST(&swhead);
321		SLIST_REMOVE_HEAD(&swhead, sw_nextp);
322		free(stmp);
323	}
324#endif /* TRY_NEWORDER */
325
326	while (wait(NULL) > 0 || errno == EINTR)
327		;
328	return (0);
329}
330
331static struct conf_entry *
332init_entry(const char *fname, struct conf_entry *src_entry)
333{
334	struct conf_entry *tempwork;
335
336	if (verbose > 4)
337		printf("\t--> [creating entry for %s]\n", fname);
338
339	tempwork = malloc(sizeof(struct conf_entry));
340	if (tempwork == NULL)
341		err(1, "malloc of conf_entry for %s", fname);
342
343	if (destdir == NULL || fname[0] != '/')
344		tempwork->log = strdup(fname);
345	else
346		asprintf(&tempwork->log, "%s%s", destdir, fname);
347	if (tempwork->log == NULL)
348		err(1, "strdup for %s", fname);
349
350	if (src_entry != NULL) {
351		tempwork->pid_file = NULL;
352		if (src_entry->pid_file)
353			tempwork->pid_file = strdup(src_entry->pid_file);
354		tempwork->r_reason = NULL;
355		tempwork->firstcreate = 0;
356		tempwork->rotate = 0;
357		tempwork->fsize = -1;
358		tempwork->uid = src_entry->uid;
359		tempwork->gid = src_entry->gid;
360		tempwork->numlogs = src_entry->numlogs;
361		tempwork->trsize = src_entry->trsize;
362		tempwork->hours = src_entry->hours;
363		tempwork->trim_at = NULL;
364		if (src_entry->trim_at != NULL)
365			tempwork->trim_at = ptime_init(src_entry->trim_at);
366		tempwork->permissions = src_entry->permissions;
367		tempwork->flags = src_entry->flags;
368		tempwork->sig = src_entry->sig;
369		tempwork->def_cfg = src_entry->def_cfg;
370	} else {
371		/* Initialize as a "do-nothing" entry */
372		tempwork->pid_file = NULL;
373		tempwork->r_reason = NULL;
374		tempwork->firstcreate = 0;
375		tempwork->rotate = 0;
376		tempwork->fsize = -1;
377		tempwork->uid = (uid_t)-1;
378		tempwork->gid = (gid_t)-1;
379		tempwork->numlogs = 1;
380		tempwork->trsize = -1;
381		tempwork->hours = -1;
382		tempwork->trim_at = NULL;
383		tempwork->permissions = 0;
384		tempwork->flags = 0;
385		tempwork->sig = SIGHUP;
386		tempwork->def_cfg = 0;
387	}
388	tempwork->next = NULL;
389
390	return (tempwork);
391}
392
393static void
394free_entry(struct conf_entry *ent)
395{
396
397	if (ent == NULL)
398		return;
399
400	if (ent->log != NULL) {
401		if (verbose > 4)
402			printf("\t--> [freeing entry for %s]\n", ent->log);
403		free(ent->log);
404		ent->log = NULL;
405	}
406
407	if (ent->pid_file != NULL) {
408		free(ent->pid_file);
409		ent->pid_file = NULL;
410	}
411
412	if (ent->r_reason != NULL) {
413		free(ent->r_reason);
414		ent->r_reason = NULL;
415	}
416
417	if (ent->trim_at != NULL) {
418		ptime_free(ent->trim_at);
419		ent->trim_at = NULL;
420	}
421
422	free(ent);
423}
424
425static void
426free_clist(struct conf_entry **firstent)
427{
428	struct conf_entry *ent, *nextent;
429
430	if (firstent == NULL)
431		return;			/* There is nothing to do. */
432
433	ent = *firstent;
434	firstent = NULL;
435
436	while (ent) {
437		nextent = ent->next;
438		free_entry(ent);
439		ent = nextent;
440	}
441}
442
443static fk_entry
444do_entry(struct conf_entry * ent)
445{
446#define	REASON_MAX	80
447	int modtime;
448	fk_entry free_or_keep;
449	double diffsecs;
450	char temp_reason[REASON_MAX];
451
452	free_or_keep = FREE_ENT;
453	if (verbose) {
454		if (ent->flags & CE_COMPACT)
455			printf("%s <%dZ>: ", ent->log, ent->numlogs);
456		else if (ent->flags & CE_BZCOMPACT)
457			printf("%s <%dJ>: ", ent->log, ent->numlogs);
458		else
459			printf("%s <%d>: ", ent->log, ent->numlogs);
460	}
461	ent->fsize = sizefile(ent->log);
462	modtime = age_old_log(ent->log);
463	ent->rotate = 0;
464	ent->firstcreate = 0;
465	if (ent->fsize < 0) {
466		/*
467		 * If either the C flag or the -C option was specified,
468		 * and if we won't be creating the file, then have the
469		 * verbose message include a hint as to why the file
470		 * will not be created.
471		 */
472		temp_reason[0] = '\0';
473		if (createlogs > 1)
474			ent->firstcreate = 1;
475		else if ((ent->flags & CE_CREATE) && createlogs)
476			ent->firstcreate = 1;
477		else if (ent->flags & CE_CREATE)
478			strncpy(temp_reason, " (no -C option)", REASON_MAX);
479		else if (createlogs)
480			strncpy(temp_reason, " (no C flag)", REASON_MAX);
481
482		if (ent->firstcreate) {
483			if (verbose)
484				printf("does not exist -> will create.\n");
485			createlog(ent);
486		} else if (verbose) {
487			printf("does not exist, skipped%s.\n", temp_reason);
488		}
489	} else {
490		if (ent->flags & CE_TRIMAT && !force && !rotatereq) {
491			diffsecs = ptimeget_diff(timenow, ent->trim_at);
492			if (diffsecs < 0.0) {
493				/* trim_at is some time in the future. */
494				if (verbose) {
495					ptime_adjust4dst(ent->trim_at,
496					    timenow);
497					printf("--> will trim at %s",
498					    ptimeget_ctime(ent->trim_at));
499				}
500				return (free_or_keep);
501			} else if (diffsecs >= 3600.0) {
502				/*
503				 * trim_at is more than an hour in the past,
504				 * so find the next valid trim_at time, and
505				 * tell the user what that will be.
506				 */
507				if (verbose && dbg_at_times)
508					printf("\n\t--> prev trim at %s\t",
509					    ptimeget_ctime(ent->trim_at));
510				if (verbose) {
511					ptimeset_nxtime(ent->trim_at);
512					printf("--> will trim at %s",
513					    ptimeget_ctime(ent->trim_at));
514				}
515				return (free_or_keep);
516			} else if (verbose && noaction && dbg_at_times) {
517				/*
518				 * If we are just debugging at-times, then
519				 * a detailed message is helpful.  Also
520				 * skip "doing" any commands, since they
521				 * would all be turned off by no-action.
522				 */
523				printf("\n\t--> timematch at %s",
524				    ptimeget_ctime(ent->trim_at));
525				return (free_or_keep);
526			} else if (verbose && ent->hours <= 0) {
527				printf("--> time is up\n");
528			}
529		}
530		if (verbose && (ent->trsize > 0))
531			printf("size (Kb): %d [%d] ", ent->fsize, ent->trsize);
532		if (verbose && (ent->hours > 0))
533			printf(" age (hr): %d [%d] ", modtime, ent->hours);
534
535		/*
536		 * Figure out if this logfile needs to be rotated.
537		 */
538		temp_reason[0] = '\0';
539		if (rotatereq) {
540			ent->rotate = 1;
541			snprintf(temp_reason, REASON_MAX, " due to -R from %s",
542			    requestor);
543		} else if (force) {
544			ent->rotate = 1;
545			snprintf(temp_reason, REASON_MAX, " due to -F request");
546		} else if ((ent->trsize > 0) && (ent->fsize >= ent->trsize)) {
547			ent->rotate = 1;
548			snprintf(temp_reason, REASON_MAX, " due to size>%dK",
549			    ent->trsize);
550		} else if (ent->hours <= 0 && (ent->flags & CE_TRIMAT)) {
551			ent->rotate = 1;
552		} else if ((ent->hours > 0) && ((modtime >= ent->hours) ||
553		    (modtime < 0))) {
554			ent->rotate = 1;
555		}
556
557		/*
558		 * If the file needs to be rotated, then rotate it.
559		 */
560		if (ent->rotate) {
561			if (temp_reason[0] != '\0')
562				ent->r_reason = strdup(temp_reason);
563			if (verbose)
564				printf("--> trimming log....\n");
565			if (noaction && !verbose) {
566				if (ent->flags & CE_COMPACT)
567					printf("%s <%dZ>: trimming\n",
568					    ent->log, ent->numlogs);
569				else if (ent->flags & CE_BZCOMPACT)
570					printf("%s <%dJ>: trimming\n",
571					    ent->log, ent->numlogs);
572				else
573					printf("%s <%d>: trimming\n",
574					    ent->log, ent->numlogs);
575			}
576			free_or_keep = do_rotate(ent);
577		} else {
578			if (verbose)
579				printf("--> skipping\n");
580		}
581	}
582	return (free_or_keep);
583#undef REASON_MAX
584}
585
586/* Send a signal to the pid specified by pidfile */
587static int
588send_signal(const struct conf_entry *ent)
589{
590	pid_t target_pid;
591	int did_notify;
592	FILE *f;
593	long minok, maxok, rval;
594	const char *target_name;
595	char *endp, *linep, line[BUFSIZ];
596
597	did_notify = 0;
598	f = fopen(ent->pid_file, "r");
599	if (f == NULL) {
600		warn("can't open pid file: %s", ent->pid_file);
601		return (did_notify);
602		/* NOTREACHED */
603	}
604
605	if (fgets(line, BUFSIZ, f) == NULL) {
606		/*
607		 * XXX - If the pid file is empty, is that really a
608		 *	problem?  Wouldn't that mean that the process
609		 *	has shut down?  In that case there would be no
610		 *	problem with compressing the rotated log file.
611		 */
612		if (feof(f))
613			warnx("pid file is empty: %s",  ent->pid_file);
614		else
615			warn("can't read from pid file: %s", ent->pid_file);
616		(void) fclose(f);
617		return (did_notify);
618		/* NOTREACHED */
619	}
620	(void) fclose(f);
621
622	target_name = "daemon";
623	minok = MIN_PID;
624	maxok = MAX_PID;
625	if (ent->flags & CE_SIGNALGROUP) {
626		/*
627		 * If we are expected to signal a process-group when
628		 * rotating this logfile, then the value read in should
629		 * be the negative of a valid process ID.
630		 */
631		target_name = "process-group";
632		minok = -MAX_PID;
633		maxok = -MIN_PID;
634	}
635
636	errno = 0;
637	linep = line;
638	while (*linep == ' ')
639		linep++;
640	rval = strtol(linep, &endp, 10);
641	if (*endp != '\0' && !isspacech(*endp)) {
642		warnx("pid file does not start with a valid number: %s",
643		    ent->pid_file);
644		rval = 0;
645	} else if (rval < minok || rval > maxok) {
646		warnx("bad value '%ld' for process number in %s",
647		    rval, ent->pid_file);
648		if (verbose)
649			warnx("\t(expecting value between %ld and %ld)",
650			    minok, maxok);
651		rval = 0;
652	}
653	if (rval == 0) {
654		return (did_notify);
655		/* NOTREACHED */
656	}
657
658	target_pid = rval;
659
660	if (noaction) {
661		did_notify = 1;
662		printf("\tkill -%d %d\n", ent->sig, (int) target_pid);
663	} else if (kill(target_pid, ent->sig)) {
664		/*
665		 * XXX - Iff the error was "no such process", should that
666		 *	really be an error for us?  Perhaps the process
667		 *	is already gone, in which case there would be no
668		 *	problem with compressing the rotated log file.
669		 */
670		warn("can't notify %s, pid %d", target_name,
671		    (int) target_pid);
672	} else {
673		did_notify = 1;
674		if (verbose)
675			printf("%s pid %d notified\n", target_name,
676			    (int) target_pid);
677	}
678
679	return (did_notify);
680}
681
682static void
683parse_args(int argc, char **argv)
684{
685	int ch;
686	char *p;
687
688	timenow = ptime_init(NULL);
689	ptimeset_time(timenow, time(NULL));
690	(void)strncpy(daytime, ptimeget_ctime(timenow) + 4, 15);
691	daytime[15] = '\0';
692
693	/* Let's get our hostname */
694	(void)gethostname(hostname, sizeof(hostname));
695
696	/* Truncate domain */
697	if ((p = strchr(hostname, '.')) != NULL)
698		*p = '\0';
699
700	/* Parse command line options. */
701	while ((ch = getopt(argc, argv, "a:d:f:nrsvCD:FR:")) != -1)
702		switch (ch) {
703		case 'a':
704			archtodir++;
705			archdirname = optarg;
706			break;
707		case 'd':
708			destdir = optarg;
709			break;
710		case 'f':
711			conf = optarg;
712			break;
713		case 'n':
714			noaction++;
715			break;
716		case 'r':
717			needroot = 0;
718			break;
719		case 's':
720			nosignal = 1;
721			break;
722		case 'v':
723			verbose++;
724			break;
725		case 'C':
726			/* Useful for things like rc.diskless... */
727			createlogs++;
728			break;
729		case 'D':
730			/*
731			 * Set some debugging option.  The specific option
732			 * depends on the value of optarg.  These options
733			 * may come and go without notice or documentation.
734			 */
735			if (parse_doption(optarg))
736				break;
737			usage();
738			/* NOTREACHED */
739		case 'F':
740			force++;
741			break;
742		case 'R':
743			rotatereq++;
744			requestor = strdup(optarg);
745			break;
746		case 'm':	/* Used by OpenBSD for "monitor mode" */
747		default:
748			usage();
749			/* NOTREACHED */
750		}
751
752	if (rotatereq) {
753		if (optind == argc) {
754			warnx("At least one filename must be given when -R is specified.");
755			usage();
756			/* NOTREACHED */
757		}
758		/* Make sure "requestor" value is safe for a syslog message. */
759		for (p = requestor; *p != '\0'; p++) {
760			if (!isprintch(*p) && (*p != '\t'))
761				*p = '.';
762		}
763	}
764
765	if (dbg_timenow) {
766		/*
767		 * Note that the 'daytime' variable is not changed.
768		 * That is only used in messages that track when a
769		 * logfile is rotated, and if a file *is* rotated,
770		 * then it will still rotated at the "real now" time.
771		 */
772		ptime_free(timenow);
773		timenow = dbg_timenow;
774		fprintf(stderr, "Debug: Running as if TimeNow is %s",
775		    ptimeget_ctime(dbg_timenow));
776	}
777
778}
779
780/*
781 * These debugging options are mainly meant for developer use, such
782 * as writing regression-tests.  They would not be needed by users
783 * during normal operation of newsyslog...
784 */
785static int
786parse_doption(const char *doption)
787{
788	const char TN[] = "TN=";
789	int res;
790
791	if (strncmp(doption, TN, sizeof(TN) - 1) == 0) {
792		/*
793		 * The "TimeNow" debugging option.  This might be off
794		 * by an hour when crossing a timezone change.
795		 */
796		dbg_timenow = ptime_init(NULL);
797		res = ptime_relparse(dbg_timenow, PTM_PARSE_ISO8601,
798		    time(NULL), doption + sizeof(TN) - 1);
799		if (res == -2) {
800			warnx("Non-existent time specified on -D %s", doption);
801			return (0);			/* failure */
802		} else if (res < 0) {
803			warnx("Malformed time given on -D %s", doption);
804			return (0);			/* failure */
805		}
806		return (1);			/* successfully parsed */
807
808	}
809
810	if (strcmp(doption, "ats") == 0) {
811		dbg_at_times++;
812		return (1);			/* successfully parsed */
813	}
814
815	if (strcmp(doption, "neworder") == 0) {
816#ifdef TRY_NEWORDER
817		dbg_new_order++;
818#else
819		warnx("NOTE: The code for 'neworder' was not compiled in.");
820#endif
821		return (1);			/* successfully parsed */
822	}
823	if (strcmp(doption, "oldorder") == 0) {
824#ifdef TRY_NEWORDER
825		dbg_new_order = 0;
826#else
827		warnx("NOTE: The code for 'neworder' was not compiled in.");
828#endif
829		return (1);			/* successfully parsed */
830	}
831
832	warnx("Unknown -D (debug) option: '%s'", doption);
833	return (0);				/* failure */
834}
835
836static void
837usage(void)
838{
839
840	fprintf(stderr,
841	    "usage: newsyslog [-CFnrsv] [-a directory] [-f config-file]\n"
842	    "                 [ [-R requestor] filename ... ]\n");
843	exit(1);
844}
845
846/*
847 * Parse a configuration file and return a linked list of all the logs
848 * which should be processed.
849 */
850static struct conf_entry *
851get_worklist(char **files)
852{
853	FILE *f;
854	const char *fname;
855	char **given;
856	struct conf_entry *defconf, *dupent, *ent, *firstnew;
857	struct conf_entry *globlist, *lastnew, *worklist;
858	int gmatch, fnres;
859
860	defconf = globlist = worklist = NULL;
861
862	fname = conf;
863	if (fname == NULL)
864		fname = _PATH_CONF;
865
866	if (strcmp(fname, "-") != 0)
867		f = fopen(fname, "r");
868	else {
869		f = stdin;
870		fname = "<stdin>";
871	}
872	if (!f)
873		err(1, "%s", conf);
874
875	parse_file(f, fname, &worklist, &globlist, &defconf);
876	(void) fclose(f);
877
878	/*
879	 * All config-file information has been read in and turned into
880	 * a worklist and a globlist.  If there were no specific files
881	 * given on the run command, then the only thing left to do is to
882	 * call a routine which finds all files matched by the globlist
883	 * and adds them to the worklist.  Then return the worklist.
884	 */
885	if (*files == NULL) {
886		expand_globs(&worklist, &globlist);
887		free_clist(&globlist);
888		if (defconf != NULL)
889			free_entry(defconf);
890		return (worklist);
891		/* NOTREACHED */
892	}
893
894	/*
895	 * If newsyslog was given a specific list of files to process,
896	 * it may be that some of those files were not listed in any
897	 * config file.  Those unlisted files should get the default
898	 * rotation action.  First, create the default-rotation action
899	 * if none was found in a system config file.
900	 */
901	if (defconf == NULL) {
902		defconf = init_entry(DEFAULT_MARKER, NULL);
903		defconf->numlogs = 3;
904		defconf->trsize = 50;
905		defconf->permissions = S_IRUSR|S_IWUSR;
906	}
907
908	/*
909	 * If newsyslog was run with a list of specific filenames,
910	 * then create a new worklist which has only those files in
911	 * it, picking up the rotation-rules for those files from
912	 * the original worklist.
913	 *
914	 * XXX - Note that this will copy multiple rules for a single
915	 *	logfile, if multiple entries are an exact match for
916	 *	that file.  That matches the historic behavior, but do
917	 *	we want to continue to allow it?  If so, it should
918	 *	probably be handled more intelligently.
919	 */
920	firstnew = lastnew = NULL;
921	for (given = files; *given; ++given) {
922		/*
923		 * First try to find exact-matches for this given file.
924		 */
925		gmatch = 0;
926		for (ent = worklist; ent; ent = ent->next) {
927			if (strcmp(ent->log, *given) == 0) {
928				gmatch++;
929				dupent = init_entry(*given, ent);
930				if (!firstnew)
931					firstnew = dupent;
932				else
933					lastnew->next = dupent;
934				lastnew = dupent;
935			}
936		}
937		if (gmatch) {
938			if (verbose > 2)
939				printf("\t+ Matched entry %s\n", *given);
940			continue;
941		}
942
943		/*
944		 * There was no exact-match for this given file, so look
945		 * for a "glob" entry which does match.
946		 */
947		gmatch = 0;
948		if (verbose > 2 && globlist != NULL)
949			printf("\t+ Checking globs for %s\n", *given);
950		for (ent = globlist; ent; ent = ent->next) {
951			fnres = fnmatch(ent->log, *given, FNM_PATHNAME);
952			if (verbose > 2)
953				printf("\t+    = %d for pattern %s\n", fnres,
954				    ent->log);
955			if (fnres == 0) {
956				gmatch++;
957				dupent = init_entry(*given, ent);
958				if (!firstnew)
959					firstnew = dupent;
960				else
961					lastnew->next = dupent;
962				lastnew = dupent;
963				/* This new entry is not a glob! */
964				dupent->flags &= ~CE_GLOB;
965				/* Only allow a match to one glob-entry */
966				break;
967			}
968		}
969		if (gmatch) {
970			if (verbose > 2)
971				printf("\t+ Matched %s via %s\n", *given,
972				    ent->log);
973			continue;
974		}
975
976		/*
977		 * This given file was not found in any config file, so
978		 * add a worklist item based on the default entry.
979		 */
980		if (verbose > 2)
981			printf("\t+ No entry matched %s  (will use %s)\n",
982			    *given, DEFAULT_MARKER);
983		dupent = init_entry(*given, defconf);
984		if (!firstnew)
985			firstnew = dupent;
986		else
987			lastnew->next = dupent;
988		/* Mark that it was *not* found in a config file */
989		dupent->def_cfg = 1;
990		lastnew = dupent;
991	}
992
993	/*
994	 * Free all the entries in the original work list, the list of
995	 * glob entries, and the default entry.
996	 */
997	free_clist(&worklist);
998	free_clist(&globlist);
999	free_entry(defconf);
1000
1001	/* And finally, return a worklist which matches the given files. */
1002	return (firstnew);
1003}
1004
1005/*
1006 * Expand the list of entries with filename patterns, and add all files
1007 * which match those glob-entries onto the worklist.
1008 */
1009static void
1010expand_globs(struct conf_entry **work_p, struct conf_entry **glob_p)
1011{
1012	int gmatch, gres, i;
1013	char *mfname;
1014	struct conf_entry *dupent, *ent, *firstmatch, *globent;
1015	struct conf_entry *lastmatch;
1016	glob_t pglob;
1017	struct stat st_fm;
1018
1019	if ((glob_p == NULL) || (*glob_p == NULL))
1020		return;			/* There is nothing to do. */
1021
1022	/*
1023	 * The worklist contains all fully-specified (non-GLOB) names.
1024	 *
1025	 * Now expand the list of filename-pattern (GLOB) entries into
1026	 * a second list, which (by definition) will only match files
1027	 * that already exist.  Do not add a glob-related entry for any
1028	 * file which already exists in the fully-specified list.
1029	 */
1030	firstmatch = lastmatch = NULL;
1031	for (globent = *glob_p; globent; globent = globent->next) {
1032
1033		gres = glob(globent->log, GLOB_NOCHECK, NULL, &pglob);
1034		if (gres != 0) {
1035			warn("cannot expand pattern (%d): %s", gres,
1036			    globent->log);
1037			continue;
1038		}
1039
1040		if (verbose > 2)
1041			printf("\t+ Expanding pattern %s\n", globent->log);
1042		for (i = 0; i < pglob.gl_matchc; i++) {
1043			mfname = pglob.gl_pathv[i];
1044
1045			/* See if this file already has a specific entry. */
1046			gmatch = 0;
1047			for (ent = *work_p; ent; ent = ent->next) {
1048				if (strcmp(mfname, ent->log) == 0) {
1049					gmatch++;
1050					break;
1051				}
1052			}
1053			if (gmatch)
1054				continue;
1055
1056			/* Make sure the named matched is a file. */
1057			gres = lstat(mfname, &st_fm);
1058			if (gres != 0) {
1059				/* Error on a file that glob() matched?!? */
1060				warn("Skipping %s - lstat() error", mfname);
1061				continue;
1062			}
1063			if (!S_ISREG(st_fm.st_mode)) {
1064				/* We only rotate files! */
1065				if (verbose > 2)
1066					printf("\t+  . skipping %s (!file)\n",
1067					    mfname);
1068				continue;
1069			}
1070
1071			if (verbose > 2)
1072				printf("\t+  . add file %s\n", mfname);
1073			dupent = init_entry(mfname, globent);
1074			if (!firstmatch)
1075				firstmatch = dupent;
1076			else
1077				lastmatch->next = dupent;
1078			lastmatch = dupent;
1079			/* This new entry is not a glob! */
1080			dupent->flags &= ~CE_GLOB;
1081		}
1082		globfree(&pglob);
1083		if (verbose > 2)
1084			printf("\t+ Done with pattern %s\n", globent->log);
1085	}
1086
1087	/* Add the list of matched files to the end of the worklist. */
1088	if (!*work_p)
1089		*work_p = firstmatch;
1090	else {
1091		ent = *work_p;
1092		while (ent->next)
1093			ent = ent->next;
1094		ent->next = firstmatch;
1095	}
1096
1097}
1098
1099/*
1100 * Parse a configuration file and update a linked list of all the logs to
1101 * process.
1102 */
1103static void
1104parse_file(FILE *cf, const char *cfname, struct conf_entry **work_p,
1105    struct conf_entry **glob_p, struct conf_entry **defconf_p)
1106{
1107	char line[BUFSIZ], *parse, *q;
1108	char *cp, *errline, *group;
1109	struct conf_entry *lastglob, *lastwork, *working;
1110	struct passwd *pwd;
1111	struct group *grp;
1112	int eol, ptm_opts, res, special;
1113
1114	/*
1115	 * XXX - for now, assume that only one config file will be read,
1116	 *	ie, this routine is only called one time.
1117	 */
1118	lastglob = lastwork = NULL;
1119
1120	errline = NULL;
1121	while (fgets(line, BUFSIZ, cf)) {
1122		if ((line[0] == '\n') || (line[0] == '#') ||
1123		    (strlen(line) == 0))
1124			continue;
1125		if (errline != NULL)
1126			free(errline);
1127		errline = strdup(line);
1128		for (cp = line + 1; *cp != '\0'; cp++) {
1129			if (*cp != '#')
1130				continue;
1131			if (*(cp - 1) == '\\') {
1132				strcpy(cp - 1, cp);
1133				cp--;
1134				continue;
1135			}
1136			*cp = '\0';
1137			break;
1138		}
1139
1140		q = parse = missing_field(sob(line), errline);
1141		parse = son(line);
1142		if (!*parse)
1143			errx(1, "malformed line (missing fields):\n%s",
1144			    errline);
1145		*parse = '\0';
1146
1147		/*
1148		 * Allow people to set debug options via the config file.
1149		 * (NOTE: debug optons are undocumented, and may disappear
1150		 * at any time, etc).
1151		 */
1152		if (strcasecmp(DEBUG_MARKER, q) == 0) {
1153			q = parse = missing_field(sob(++parse), errline);
1154			parse = son(parse);
1155			if (!*parse)
1156				warnx("debug line specifies no option:\n%s",
1157				    errline);
1158			else {
1159				*parse = '\0';
1160				parse_doption(q);
1161			}
1162			continue;
1163		}
1164
1165		special = 0;
1166		working = init_entry(q, NULL);
1167		if (strcasecmp(DEFAULT_MARKER, q) == 0) {
1168			special = 1;
1169			if (defconf_p == NULL) {
1170				warnx("Ignoring entry for %s in %s!", q,
1171				    cfname);
1172				free_entry(working);
1173				continue;
1174			} else if (*defconf_p != NULL) {
1175				warnx("Ignoring duplicate entry for %s!", q);
1176				free_entry(working);
1177				continue;
1178			}
1179			*defconf_p = working;
1180		}
1181
1182		q = parse = missing_field(sob(++parse), errline);
1183		parse = son(parse);
1184		if (!*parse)
1185			errx(1, "malformed line (missing fields):\n%s",
1186			    errline);
1187		*parse = '\0';
1188		if ((group = strchr(q, ':')) != NULL ||
1189		    (group = strrchr(q, '.')) != NULL) {
1190			*group++ = '\0';
1191			if (*q) {
1192				if (!(isnumberstr(q))) {
1193					if ((pwd = getpwnam(q)) == NULL)
1194						errx(1,
1195				     "error in config file; unknown user:\n%s",
1196						    errline);
1197					working->uid = pwd->pw_uid;
1198				} else
1199					working->uid = atoi(q);
1200			} else
1201				working->uid = (uid_t)-1;
1202
1203			q = group;
1204			if (*q) {
1205				if (!(isnumberstr(q))) {
1206					if ((grp = getgrnam(q)) == NULL)
1207						errx(1,
1208				    "error in config file; unknown group:\n%s",
1209						    errline);
1210					working->gid = grp->gr_gid;
1211				} else
1212					working->gid = atoi(q);
1213			} else
1214				working->gid = (gid_t)-1;
1215
1216			q = parse = missing_field(sob(++parse), errline);
1217			parse = son(parse);
1218			if (!*parse)
1219				errx(1, "malformed line (missing fields):\n%s",
1220				    errline);
1221			*parse = '\0';
1222		} else {
1223			working->uid = (uid_t)-1;
1224			working->gid = (gid_t)-1;
1225		}
1226
1227		if (!sscanf(q, "%o", &working->permissions))
1228			errx(1, "error in config file; bad permissions:\n%s",
1229			    errline);
1230
1231		q = parse = missing_field(sob(++parse), errline);
1232		parse = son(parse);
1233		if (!*parse)
1234			errx(1, "malformed line (missing fields):\n%s",
1235			    errline);
1236		*parse = '\0';
1237		if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0)
1238			errx(1, "error in config file; bad value for count of logs to save:\n%s",
1239			    errline);
1240
1241		q = parse = missing_field(sob(++parse), errline);
1242		parse = son(parse);
1243		if (!*parse)
1244			errx(1, "malformed line (missing fields):\n%s",
1245			    errline);
1246		*parse = '\0';
1247		if (isdigitch(*q))
1248			working->trsize = atoi(q);
1249		else if (strcmp(q, "*") == 0)
1250			working->trsize = -1;
1251		else {
1252			warnx("Invalid value of '%s' for 'size' in line:\n%s",
1253			    q, errline);
1254			working->trsize = -1;
1255		}
1256
1257		working->flags = 0;
1258		q = parse = missing_field(sob(++parse), errline);
1259		parse = son(parse);
1260		eol = !*parse;
1261		*parse = '\0';
1262		{
1263			char *ep;
1264			u_long ul;
1265
1266			ul = strtoul(q, &ep, 10);
1267			if (ep == q)
1268				working->hours = 0;
1269			else if (*ep == '*')
1270				working->hours = -1;
1271			else if (ul > INT_MAX)
1272				errx(1, "interval is too large:\n%s", errline);
1273			else
1274				working->hours = ul;
1275
1276			if (*ep == '\0' || strcmp(ep, "*") == 0)
1277				goto no_trimat;
1278			if (*ep != '@' && *ep != '$')
1279				errx(1, "malformed interval/at:\n%s", errline);
1280
1281			working->flags |= CE_TRIMAT;
1282			working->trim_at = ptime_init(NULL);
1283			ptm_opts = PTM_PARSE_ISO8601;
1284			if (*ep == '$')
1285				ptm_opts = PTM_PARSE_DWM;
1286			ptm_opts |= PTM_PARSE_MATCHDOM;
1287			res = ptime_relparse(working->trim_at, ptm_opts,
1288			    ptimeget_secs(timenow), ep + 1);
1289			if (res == -2)
1290				errx(1, "nonexistent time for 'at' value:\n%s",
1291				    errline);
1292			else if (res < 0)
1293				errx(1, "malformed 'at' value:\n%s", errline);
1294		}
1295no_trimat:
1296
1297		if (eol)
1298			q = NULL;
1299		else {
1300			q = parse = sob(++parse);	/* Optional field */
1301			parse = son(parse);
1302			if (!*parse)
1303				eol = 1;
1304			*parse = '\0';
1305		}
1306
1307		for (; q && *q && !isspacech(*q); q++) {
1308			switch (tolowerch(*q)) {
1309			case 'b':
1310				working->flags |= CE_BINARY;
1311				break;
1312			case 'c':
1313				/*
1314				 * XXX - 	Ick! Ugly! Remove ASAP!
1315				 * We want `c' and `C' for "create".  But we
1316				 * will temporarily treat `c' as `g', because
1317				 * FreeBSD releases <= 4.8 have a typo of
1318				 * checking  ('G' || 'c')  for CE_GLOB.
1319				 */
1320				if (*q == 'c') {
1321					warnx("Assuming 'g' for 'c' in flags for line:\n%s",
1322					    errline);
1323					warnx("The 'c' flag will eventually mean 'CREATE'");
1324					working->flags |= CE_GLOB;
1325					break;
1326				}
1327				working->flags |= CE_CREATE;
1328				break;
1329			case 'd':
1330				working->flags |= CE_NODUMP;
1331				break;
1332			case 'g':
1333				working->flags |= CE_GLOB;
1334				break;
1335			case 'j':
1336				working->flags |= CE_BZCOMPACT;
1337				break;
1338			case 'n':
1339				working->flags |= CE_NOSIGNAL;
1340				break;
1341			case 'u':
1342				working->flags |= CE_SIGNALGROUP;
1343				break;
1344			case 'w':
1345				working->flags |= CE_COMPACTWAIT;
1346				break;
1347			case 'z':
1348				working->flags |= CE_COMPACT;
1349				break;
1350			case '-':
1351				break;
1352			case 'f':	/* Used by OpenBSD for "CE_FOLLOW" */
1353			case 'm':	/* Used by OpenBSD for "CE_MONITOR" */
1354			case 'p':	/* Used by NetBSD  for "CE_PLAIN0" */
1355			default:
1356				errx(1, "illegal flag in config file -- %c",
1357				    *q);
1358			}
1359		}
1360
1361		if (eol)
1362			q = NULL;
1363		else {
1364			q = parse = sob(++parse);	/* Optional field */
1365			parse = son(parse);
1366			if (!*parse)
1367				eol = 1;
1368			*parse = '\0';
1369		}
1370
1371		working->pid_file = NULL;
1372		if (q && *q) {
1373			if (*q == '/')
1374				working->pid_file = strdup(q);
1375			else if (isdigit(*q))
1376				goto got_sig;
1377			else
1378				errx(1,
1379			"illegal pid file or signal number in config file:\n%s",
1380				    errline);
1381		}
1382		if (eol)
1383			q = NULL;
1384		else {
1385			q = parse = sob(++parse);	/* Optional field */
1386			*(parse = son(parse)) = '\0';
1387		}
1388
1389		working->sig = SIGHUP;
1390		if (q && *q) {
1391			if (isdigit(*q)) {
1392		got_sig:
1393				working->sig = atoi(q);
1394			} else {
1395		err_sig:
1396				errx(1,
1397				    "illegal signal number in config file:\n%s",
1398				    errline);
1399			}
1400			if (working->sig < 1 || working->sig >= NSIG)
1401				goto err_sig;
1402		}
1403
1404		/*
1405		 * Finish figuring out what pid-file to use (if any) in
1406		 * later processing if this logfile needs to be rotated.
1407		 */
1408		if ((working->flags & CE_NOSIGNAL) == CE_NOSIGNAL) {
1409			/*
1410			 * This config-entry specified 'n' for nosignal,
1411			 * see if it also specified an explicit pid_file.
1412			 * This would be a pretty pointless combination.
1413			 */
1414			if (working->pid_file != NULL) {
1415				warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s",
1416				    working->pid_file, errline);
1417				free(working->pid_file);
1418				working->pid_file = NULL;
1419			}
1420		} else if (working->pid_file == NULL) {
1421			/*
1422			 * This entry did not specify the 'n' flag, which
1423			 * means it should signal syslogd unless it had
1424			 * specified some other pid-file (and obviously the
1425			 * syslog pid-file will not be for a process-group).
1426			 * Also, we should only try to notify syslog if we
1427			 * are root.
1428			 */
1429			if (working->flags & CE_SIGNALGROUP) {
1430				warnx("Ignoring flag 'U' in line:\n%s",
1431				    errline);
1432				working->flags &= ~CE_SIGNALGROUP;
1433			}
1434			if (needroot)
1435				working->pid_file = strdup(_PATH_SYSLOGPID);
1436		}
1437
1438		/*
1439		 * Add this entry to the appropriate list of entries, unless
1440		 * it was some kind of special entry (eg: <default>).
1441		 */
1442		if (special) {
1443			;			/* Do not add to any list */
1444		} else if (working->flags & CE_GLOB) {
1445			if (!*glob_p)
1446				*glob_p = working;
1447			else
1448				lastglob->next = working;
1449			lastglob = working;
1450		} else {
1451			if (!*work_p)
1452				*work_p = working;
1453			else
1454				lastwork->next = working;
1455			lastwork = working;
1456		}
1457	}
1458	if (errline != NULL)
1459		free(errline);
1460}
1461
1462static char *
1463missing_field(char *p, char *errline)
1464{
1465
1466	if (!p || !*p)
1467		errx(1, "missing field in config file:\n%s", errline);
1468	return (p);
1469}
1470
1471static fk_entry
1472do_rotate(const struct conf_entry *ent)
1473{
1474	char dirpart[MAXPATHLEN], namepart[MAXPATHLEN];
1475	char file1[MAXPATHLEN], file2[MAXPATHLEN];
1476	char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN];
1477	char jfile1[MAXPATHLEN];
1478	int flags, notified, need_notification, numlogs_c;
1479	fk_entry free_or_keep;
1480	struct stat st;
1481
1482	flags = ent->flags;
1483	free_or_keep = FREE_ENT;
1484
1485	if (archtodir) {
1486		char *p;
1487
1488		/* build complete name of archive directory into dirpart */
1489		if (*archdirname == '/') {	/* absolute */
1490			strlcpy(dirpart, archdirname, sizeof(dirpart));
1491		} else {	/* relative */
1492			/* get directory part of logfile */
1493			strlcpy(dirpart, ent->log, sizeof(dirpart));
1494			if ((p = rindex(dirpart, '/')) == NULL)
1495				dirpart[0] = '\0';
1496			else
1497				*(p + 1) = '\0';
1498			strlcat(dirpart, archdirname, sizeof(dirpart));
1499		}
1500
1501		/* check if archive directory exists, if not, create it */
1502		if (lstat(dirpart, &st))
1503			createdir(ent, dirpart);
1504
1505		/* get filename part of logfile */
1506		if ((p = rindex(ent->log, '/')) == NULL)
1507			strlcpy(namepart, ent->log, sizeof(namepart));
1508		else
1509			strlcpy(namepart, p + 1, sizeof(namepart));
1510
1511		/* name of oldest log */
1512		(void) snprintf(file1, sizeof(file1), "%s/%s.%d", dirpart,
1513		    namepart, ent->numlogs);
1514		(void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1,
1515		    COMPRESS_POSTFIX);
1516		snprintf(jfile1, sizeof(jfile1), "%s%s", file1,
1517		    BZCOMPRESS_POSTFIX);
1518	} else {
1519		/* name of oldest log */
1520		(void) snprintf(file1, sizeof(file1), "%s.%d", ent->log,
1521		    ent->numlogs);
1522		(void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1,
1523		    COMPRESS_POSTFIX);
1524		snprintf(jfile1, sizeof(jfile1), "%s%s", file1,
1525		    BZCOMPRESS_POSTFIX);
1526	}
1527
1528	if (noaction) {
1529		printf("\trm -f %s\n", file1);
1530		printf("\trm -f %s\n", zfile1);
1531		printf("\trm -f %s\n", jfile1);
1532	} else {
1533		(void) unlink(file1);
1534		(void) unlink(zfile1);
1535		(void) unlink(jfile1);
1536	}
1537
1538	/* Move down log files */
1539	numlogs_c = ent->numlogs;		/* copy for countdown */
1540	while (numlogs_c--) {
1541
1542		(void) strlcpy(file2, file1, sizeof(file2));
1543
1544		if (archtodir)
1545			(void) snprintf(file1, sizeof(file1), "%s/%s.%d",
1546			    dirpart, namepart, numlogs_c);
1547		else
1548			(void) snprintf(file1, sizeof(file1), "%s.%d",
1549			    ent->log, numlogs_c);
1550
1551		(void) strlcpy(zfile1, file1, sizeof(zfile1));
1552		(void) strlcpy(zfile2, file2, sizeof(zfile2));
1553		if (lstat(file1, &st)) {
1554			(void) strlcat(zfile1, COMPRESS_POSTFIX,
1555			    sizeof(zfile1));
1556			(void) strlcat(zfile2, COMPRESS_POSTFIX,
1557			    sizeof(zfile2));
1558			if (lstat(zfile1, &st)) {
1559				strlcpy(zfile1, file1, sizeof(zfile1));
1560				strlcpy(zfile2, file2, sizeof(zfile2));
1561				strlcat(zfile1, BZCOMPRESS_POSTFIX,
1562				    sizeof(zfile1));
1563				strlcat(zfile2, BZCOMPRESS_POSTFIX,
1564				    sizeof(zfile2));
1565				if (lstat(zfile1, &st))
1566					continue;
1567			}
1568		}
1569		if (noaction)
1570			printf("\tmv %s %s\n", zfile1, zfile2);
1571		else {
1572			/* XXX - Ought to be checking for failure! */
1573			(void)rename(zfile1, zfile2);
1574		}
1575		change_attrs(zfile2, ent);
1576	}
1577
1578	if (ent->numlogs > 0) {
1579		if (noaction) {
1580			/*
1581			 * Note that savelog() may succeed with using link()
1582			 * for the archtodir case, but there is no good way
1583			 * of knowing if it will when doing "noaction", so
1584			 * here we claim that it will have to do a copy...
1585			 */
1586			if (archtodir)
1587				printf("\tcp %s %s\n", ent->log, file1);
1588			else
1589				printf("\tln %s %s\n", ent->log, file1);
1590		} else {
1591			if (!(flags & CE_BINARY)) {
1592				/* Report the trimming to the old log */
1593				log_trim(ent->log, ent);
1594			}
1595			savelog(ent->log, file1);
1596		}
1597		change_attrs(file1, ent);
1598	}
1599
1600	/* Create the new log file and move it into place */
1601	if (noaction)
1602		printf("Start new log...\n");
1603	createlog(ent);
1604
1605#ifdef TRY_NEWORDER
1606	/*
1607	 * Save all signalling and file-compression to be done after log
1608	 * files from all entries have been rotated.  This way any one
1609	 * process will not be sent the same signal multiple times when
1610	 * multiple log files had to be rotated.
1611	 */
1612	if (dbg_new_order) {
1613		struct sigwork_entry *swork;
1614
1615		swork = NULL;
1616		if (ent->pid_file != NULL)
1617			swork = save_sigwork(ent);
1618		if (ent->numlogs > 0 && (flags & (CE_COMPACT | CE_BZCOMPACT))) {
1619			/*
1620			 * The zipwork_entry will include a pointer to this
1621			 * conf_entry, so the conf_entry should not be freed.
1622			 */
1623			free_or_keep = KEEP_ENT;
1624			save_zipwork(ent, swork, ent->fsize, file1);
1625		}
1626		return (free_or_keep);
1627	}
1628#endif /* TRY_NEWORDER */
1629
1630	/*
1631	 * Find out if there is a process to signal.  If nosignal (-s) was
1632	 * specified, then do not signal any process.  Note that nosignal
1633	 * will trigger a warning message if the rotated logfile needs to
1634	 * be compressed, *unless* -R was specified.  This is because there
1635	 * presumably still are process(es) writing to the old logfile, but
1636	 * we assume that a -sR request comes from a process which writes
1637	 * to the logfile, and as such, that process has already made sure
1638	 * that the logfile is not presently in use.
1639	 */
1640	need_notification = notified = 0;
1641	if (ent->pid_file != NULL) {
1642		need_notification = 1;
1643		if (!nosignal)
1644			notified = send_signal(ent);	/* the normal case! */
1645		else if (rotatereq)
1646			need_notification = 0;
1647	}
1648
1649	if ((flags & CE_COMPACT) || (flags & CE_BZCOMPACT)) {
1650		if (need_notification && !notified)
1651			warnx(
1652			    "log %s.0 not compressed because daemon(s) not notified",
1653			    ent->log);
1654		else if (noaction) {
1655			printf("\tsleep 10\n");
1656			if (flags & CE_COMPACT)
1657				printf("\tgzip %s.0\n", ent->log);
1658			else
1659				printf("\tbzip2 %s.0\n", ent->log);
1660		} else {
1661			if (notified) {
1662				if (verbose)
1663					printf("small pause to allow daemon(s) to close log\n");
1664				sleep(10);
1665			}
1666			if (archtodir) {
1667				(void) snprintf(file1, sizeof(file1), "%s/%s",
1668				    dirpart, namepart);
1669				if (flags & CE_COMPACT)
1670					compress_log(file1,
1671					    flags & CE_COMPACTWAIT);
1672				else if (flags & CE_BZCOMPACT)
1673					bzcompress_log(file1,
1674					    flags & CE_COMPACTWAIT);
1675			} else {
1676				if (flags & CE_COMPACT)
1677					compress_log(ent->log,
1678					    flags & CE_COMPACTWAIT);
1679				else if (flags & CE_BZCOMPACT)
1680					bzcompress_log(ent->log,
1681					    flags & CE_COMPACTWAIT);
1682			}
1683		}
1684	}
1685	return (free_or_keep);
1686}
1687
1688#ifdef TRY_NEWORDER
1689static void
1690do_sigwork(struct sigwork_entry *swork)
1691{
1692	struct sigwork_entry *nextsig;
1693	int kres, secs;
1694
1695	if (!(swork->sw_pidok) || swork->sw_pid == 0)
1696		return;			/* no work to do... */
1697
1698	/*
1699	 * If nosignal (-s) was specified, then do not signal any process.
1700	 * Note that a nosignal request triggers a warning message if the
1701	 * rotated logfile needs to be compressed, *unless* -R was also
1702	 * specified.  We assume that an `-sR' request came from a process
1703	 * which writes to the logfile, and as such, we assume that process
1704	 * has already made sure the logfile is not presently in use.  This
1705	 * just sets swork->sw_pidok to a special value, and do_zipwork
1706	 * will print any necessary warning(s).
1707	 */
1708	if (nosignal) {
1709		if (!rotatereq)
1710			swork->sw_pidok = -1;
1711		return;
1712	}
1713
1714	/*
1715	 * Compute the pause between consecutive signals.  Use a longer
1716	 * sleep time if we will be sending two signals to the same
1717	 * deamon or process-group.
1718	 */
1719	secs = 0;
1720	nextsig = SLIST_NEXT(swork, sw_nextp);
1721	if (nextsig != NULL) {
1722		if (swork->sw_pid == nextsig->sw_pid)
1723			secs = 10;
1724		else
1725			secs = 1;
1726	}
1727
1728	if (noaction) {
1729		printf("\tkill -%d %d \t\t# %s\n", swork->sw_signum,
1730		    (int)swork->sw_pid, swork->sw_fname);
1731		if (secs > 0)
1732			printf("\tsleep %d\n", secs);
1733		return;
1734	}
1735
1736	kres = kill(swork->sw_pid, swork->sw_signum);
1737	if (kres != 0) {
1738		/*
1739		 * Assume that "no such process" (ESRCH) is something
1740		 * to warn about, but is not an error.  Presumably the
1741		 * process which writes to the rotated log file(s) is
1742		 * gone, in which case we should have no problem with
1743		 * compressing the rotated log file(s).
1744		 */
1745		if (errno != ESRCH)
1746			swork->sw_pidok = 0;
1747		warn("can't notify %s, pid %d", swork->sw_pidtype,
1748		    (int)swork->sw_pid);
1749	} else {
1750		if (verbose)
1751			printf("Notified %s pid %d = %s\n", swork->sw_pidtype,
1752			    (int)swork->sw_pid, swork->sw_fname);
1753		if (secs > 0) {
1754			if (verbose)
1755				printf("Pause %d second(s) between signals\n",
1756				    secs);
1757			sleep(secs);
1758		}
1759	}
1760}
1761
1762static void
1763do_zipwork(struct zipwork_entry *zwork)
1764{
1765	const char *pgm_name, *pgm_path;
1766	int zstatus;
1767	pid_t pidzip, wpid;
1768	char zresult[MAXPATHLEN];
1769
1770	pgm_path = NULL;
1771	strlcpy(zresult, zwork->zw_fname, sizeof(zresult));
1772	if (zwork != NULL && zwork->zw_conf != NULL) {
1773		if (zwork->zw_conf->flags & CE_COMPACT) {
1774			pgm_path = _PATH_GZIP;
1775			strlcat(zresult, COMPRESS_POSTFIX, sizeof(zresult));
1776		} else if (zwork->zw_conf->flags & CE_BZCOMPACT) {
1777			pgm_path = _PATH_BZIP2;
1778			strlcat(zresult, BZCOMPRESS_POSTFIX, sizeof(zresult));
1779		}
1780	}
1781	if (pgm_path == NULL) {
1782		warnx("invalid entry for %s in do_zipwork", zwork->zw_fname);
1783		return;
1784	}
1785
1786	if (zwork->zw_swork != NULL && zwork->zw_swork->sw_pidok <= 0) {
1787		warnx(
1788		    "log %s not compressed because daemon(s) not notified",
1789		    zwork->zw_fname);
1790		change_attrs(zwork->zw_fname, zwork->zw_conf);
1791		return;
1792	}
1793
1794	if (noaction) {
1795		pgm_name = strrchr(pgm_path, '/');
1796		if (pgm_name == NULL)
1797			pgm_name = pgm_path;
1798		else
1799			pgm_name++;
1800		printf("\t%s %s\n", pgm_name, zwork->zw_fname);
1801		change_attrs(zresult, zwork->zw_conf);
1802		return;
1803	}
1804
1805	pidzip = fork();
1806	if (pidzip < 0)
1807		err(1, "gzip fork");
1808	else if (!pidzip) {
1809		/* The child process executes the compression command */
1810		execl(pgm_path, pgm_path, "-f", zwork->zw_fname, (char *)0);
1811		err(1, "%s", pgm_path);
1812	}
1813
1814	wpid = waitpid(pidzip, &zstatus, 0);
1815	if (wpid == -1) {
1816		warn("%s: waitpid(%d)", pgm_path, pidzip);
1817		return;
1818	}
1819	if (!WIFEXITED(zstatus)) {
1820		warn("%s: did not terminate normally", pgm_path);
1821		return;
1822	}
1823	if (WEXITSTATUS(zstatus)) {
1824		warn("%s: terminated with %d (non-zero) status",
1825		    pgm_path, WEXITSTATUS(zstatus));
1826		return;
1827	}
1828
1829	/* Compression was successful, set file attributes on the result. */
1830	change_attrs(zresult, zwork->zw_conf);
1831}
1832
1833/*
1834 * Save information on any process we need to signal.  Any single
1835 * process may need to be sent different signal-values for different
1836 * log files, but usually a single signal-value will cause the process
1837 * to close and re-open all of it's log files.
1838 */
1839static struct sigwork_entry *
1840save_sigwork(const struct conf_entry *ent)
1841{
1842	struct sigwork_entry *sprev, *stmp;
1843	int ndiff;
1844	size_t tmpsiz;
1845
1846	sprev = NULL;
1847	ndiff = 1;
1848	SLIST_FOREACH(stmp, &swhead, sw_nextp) {
1849		ndiff = strcmp(ent->pid_file, stmp->sw_fname);
1850		if (ndiff > 0)
1851			break;
1852		if (ndiff == 0) {
1853			if (ent->sig == stmp->sw_signum)
1854				break;
1855			if (ent->sig > stmp->sw_signum) {
1856				ndiff = 1;
1857				break;
1858			}
1859		}
1860		sprev = stmp;
1861	}
1862	if (stmp != NULL && ndiff == 0)
1863		return (stmp);
1864
1865	tmpsiz = sizeof(struct sigwork_entry) + strlen(ent->pid_file) + 1;
1866	stmp = malloc(tmpsiz);
1867	set_swpid(stmp, ent);
1868	stmp->sw_signum = ent->sig;
1869	strcpy(stmp->sw_fname, ent->pid_file);
1870	if (sprev == NULL)
1871		SLIST_INSERT_HEAD(&swhead, stmp, sw_nextp);
1872	else
1873		SLIST_INSERT_AFTER(sprev, stmp, sw_nextp);
1874	return (stmp);
1875}
1876
1877/*
1878 * Save information on any file we need to compress.  We may see the same
1879 * file multiple times, so check the full list to avoid duplicates.  The
1880 * list itself is sorted smallest-to-largest, because that's the order we
1881 * want to compress the files.  If the partition is very low on disk space,
1882 * then the smallest files are the most likely to compress, and compressing
1883 * them first will free up more space for the larger files.
1884 */
1885static struct zipwork_entry *
1886save_zipwork(const struct conf_entry *ent, const struct sigwork_entry *swork,
1887    int zsize, const char *zipfname)
1888{
1889	struct zipwork_entry *zprev, *ztmp;
1890	int ndiff;
1891	size_t tmpsiz;
1892
1893	/* Compute the size if the caller did not know it. */
1894	if (zsize < 0)
1895		zsize = sizefile(zipfname);
1896
1897	zprev = NULL;
1898	ndiff = 1;
1899	SLIST_FOREACH(ztmp, &zwhead, zw_nextp) {
1900		ndiff = strcmp(zipfname, ztmp->zw_fname);
1901		if (ndiff == 0)
1902			break;
1903		if (zsize > ztmp->zw_fsize)
1904			zprev = ztmp;
1905	}
1906	if (ztmp != NULL && ndiff == 0)
1907		return (ztmp);
1908
1909	tmpsiz = sizeof(struct zipwork_entry) + strlen(zipfname) + 1;
1910	ztmp = malloc(tmpsiz);
1911	ztmp->zw_conf = ent;
1912	ztmp->zw_swork = swork;
1913	ztmp->zw_fsize = zsize;
1914	strcpy(ztmp->zw_fname, zipfname);
1915	if (zprev == NULL)
1916		SLIST_INSERT_HEAD(&zwhead, ztmp, zw_nextp);
1917	else
1918		SLIST_INSERT_AFTER(zprev, ztmp, zw_nextp);
1919	return (ztmp);
1920}
1921
1922/* Send a signal to the pid specified by pidfile */
1923static void
1924set_swpid(struct sigwork_entry *swork, const struct conf_entry *ent)
1925{
1926	FILE *f;
1927	long minok, maxok, rval;
1928	char *endp, *linep, line[BUFSIZ];
1929
1930	minok = MIN_PID;
1931	maxok = MAX_PID;
1932	swork->sw_pidok = 0;
1933	swork->sw_pid = 0;
1934	swork->sw_pidtype = "daemon";
1935	if (ent->flags & CE_SIGNALGROUP) {
1936		/*
1937		 * If we are expected to signal a process-group when
1938		 * rotating this logfile, then the value read in should
1939		 * be the negative of a valid process ID.
1940		 */
1941		minok = -MAX_PID;
1942		maxok = -MIN_PID;
1943		swork->sw_pidtype = "process-group";
1944	}
1945
1946	f = fopen(ent->pid_file, "r");
1947	if (f == NULL) {
1948		warn("can't open pid file: %s", ent->pid_file);
1949		return;
1950	}
1951
1952	if (fgets(line, BUFSIZ, f) == NULL) {
1953		/*
1954		 * Warn if the PID file is empty, but do not consider
1955		 * it an error.  Most likely it means the process has
1956		 * has terminated, so it should be safe to rotate any
1957		 * log files that the process would have been using.
1958		 */
1959		if (feof(f)) {
1960			swork->sw_pidok = 1;
1961			warnx("pid file is empty: %s", ent->pid_file);
1962		} else
1963			warn("can't read from pid file: %s", ent->pid_file);
1964		(void)fclose(f);
1965		return;
1966	}
1967	(void)fclose(f);
1968
1969	errno = 0;
1970	linep = line;
1971	while (*linep == ' ')
1972		linep++;
1973	rval = strtol(linep, &endp, 10);
1974	if (*endp != '\0' && !isspacech(*endp)) {
1975		warnx("pid file does not start with a valid number: %s",
1976		    ent->pid_file);
1977	} else if (rval < minok || rval > maxok) {
1978		warnx("bad value '%ld' for process number in %s",
1979		    rval, ent->pid_file);
1980		if (verbose)
1981			warnx("\t(expecting value between %ld and %ld)",
1982			    minok, maxok);
1983	} else {
1984		swork->sw_pidok = 1;
1985		swork->sw_pid = rval;
1986	}
1987
1988	return;
1989}
1990#endif /* TRY_NEWORDER */
1991
1992/* Log the fact that the logs were turned over */
1993static int
1994log_trim(const char *logname, const struct conf_entry *log_ent)
1995{
1996	FILE *f;
1997	const char *xtra;
1998
1999	if ((f = fopen(logname, "a")) == NULL)
2000		return (-1);
2001	xtra = "";
2002	if (log_ent->def_cfg)
2003		xtra = " using <default> rule";
2004	if (log_ent->firstcreate)
2005		fprintf(f, "%s %s newsyslog[%d]: logfile first created%s\n",
2006		    daytime, hostname, (int) getpid(), xtra);
2007	else if (log_ent->r_reason != NULL)
2008		fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s%s\n",
2009		    daytime, hostname, (int) getpid(), log_ent->r_reason, xtra);
2010	else
2011		fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s\n",
2012		    daytime, hostname, (int) getpid(), xtra);
2013	if (fclose(f) == EOF)
2014		err(1, "log_trim: fclose");
2015	return (0);
2016}
2017
2018/*
2019 * XXX - Note that both compress_log and bzcompress_log will lose the
2020 *	NODUMP flag if it was set on somelog.0.  Fixing that in newsyslog
2021 *	(as opposed to fixing gzip/bzip2) will require some restructuring
2022 *	of the code.  That restructuring is planned for a later update...
2023 */
2024/* Fork of gzip to compress the old log file */
2025static void
2026compress_log(char *logname, int dowait)
2027{
2028	pid_t pid;
2029	char tmp[MAXPATHLEN];
2030
2031	while (dowait && (wait(NULL) > 0 || errno == EINTR))
2032		;
2033	(void) snprintf(tmp, sizeof(tmp), "%s.0", logname);
2034	pid = fork();
2035	if (pid < 0)
2036		err(1, "gzip fork");
2037	else if (!pid) {
2038		(void) execl(_PATH_GZIP, _PATH_GZIP, "-f", tmp, (char *)0);
2039		err(1, _PATH_GZIP);
2040	}
2041}
2042
2043/* Fork of bzip2 to compress the old log file */
2044static void
2045bzcompress_log(char *logname, int dowait)
2046{
2047	pid_t pid;
2048	char tmp[MAXPATHLEN];
2049
2050	while (dowait && (wait(NULL) > 0 || errno == EINTR))
2051		;
2052	snprintf(tmp, sizeof(tmp), "%s.0", logname);
2053	pid = fork();
2054	if (pid < 0)
2055		err(1, "bzip2 fork");
2056	else if (!pid) {
2057		execl(_PATH_BZIP2, _PATH_BZIP2, "-f", tmp, (char *)0);
2058		err(1, _PATH_BZIP2);
2059	}
2060}
2061
2062/* Return size in kilobytes of a file */
2063static int
2064sizefile(const char *file)
2065{
2066	struct stat sb;
2067
2068	if (stat(file, &sb) < 0)
2069		return (-1);
2070	return (kbytes(dbtob(sb.st_blocks)));
2071}
2072
2073/* Return the age of old log file (file.0) */
2074static int
2075age_old_log(char *file)
2076{
2077	struct stat sb;
2078	char *endp;
2079	char tmp[MAXPATHLEN + sizeof(".0") + sizeof(COMPRESS_POSTFIX) +
2080		sizeof(BZCOMPRESS_POSTFIX) + 1];
2081
2082	if (archtodir) {
2083		char *p;
2084
2085		/* build name of archive directory into tmp */
2086		if (*archdirname == '/') {	/* absolute */
2087			strlcpy(tmp, archdirname, sizeof(tmp));
2088		} else {	/* relative */
2089			/* get directory part of logfile */
2090			strlcpy(tmp, file, sizeof(tmp));
2091			if ((p = rindex(tmp, '/')) == NULL)
2092				tmp[0] = '\0';
2093			else
2094				*(p + 1) = '\0';
2095			strlcat(tmp, archdirname, sizeof(tmp));
2096		}
2097
2098		strlcat(tmp, "/", sizeof(tmp));
2099
2100		/* get filename part of logfile */
2101		if ((p = rindex(file, '/')) == NULL)
2102			strlcat(tmp, file, sizeof(tmp));
2103		else
2104			strlcat(tmp, p + 1, sizeof(tmp));
2105	} else {
2106		(void) strlcpy(tmp, file, sizeof(tmp));
2107	}
2108
2109	strlcat(tmp, ".0", sizeof(tmp));
2110	if (stat(tmp, &sb) < 0) {
2111		/*
2112		 * A plain '.0' file does not exist.  Try again, first
2113		 * with the added suffix of '.gz', then with an added
2114		 * suffix of '.bz2' instead of '.gz'.
2115		 */
2116		endp = strchr(tmp, '\0');
2117		strlcat(tmp, COMPRESS_POSTFIX, sizeof(tmp));
2118		if (stat(tmp, &sb) < 0) {
2119			*endp = '\0';		/* Remove .gz */
2120			strlcat(tmp, BZCOMPRESS_POSTFIX, sizeof(tmp));
2121			if (stat(tmp, &sb) < 0)
2122				return (-1);
2123		}
2124	}
2125	return ((int)(ptimeget_secs(timenow) - sb.st_mtime + 1800) / 3600);
2126}
2127
2128/* Skip Over Blanks */
2129static char *
2130sob(char *p)
2131{
2132	while (p && *p && isspace(*p))
2133		p++;
2134	return (p);
2135}
2136
2137/* Skip Over Non-Blanks */
2138static char *
2139son(char *p)
2140{
2141	while (p && *p && !isspace(*p))
2142		p++;
2143	return (p);
2144}
2145
2146/* Check if string is actually a number */
2147static int
2148isnumberstr(const char *string)
2149{
2150	while (*string) {
2151		if (!isdigitch(*string++))
2152			return (0);
2153	}
2154	return (1);
2155}
2156
2157/*
2158 * Save the active log file under a new name.  A link to the new name
2159 * is the quick-and-easy way to do this.  If that fails (which it will
2160 * if the destination is on another partition), then make a copy of
2161 * the file to the new location.
2162 */
2163static void
2164savelog(char *from, char *to)
2165{
2166	FILE *src, *dst;
2167	int c, res;
2168
2169	res = link(from, to);
2170	if (res == 0)
2171		return;
2172
2173	if ((src = fopen(from, "r")) == NULL)
2174		err(1, "can't fopen %s for reading", from);
2175	if ((dst = fopen(to, "w")) == NULL)
2176		err(1, "can't fopen %s for writing", to);
2177
2178	while ((c = getc(src)) != EOF) {
2179		if ((putc(c, dst)) == EOF)
2180			err(1, "error writing to %s", to);
2181	}
2182
2183	if (ferror(src))
2184		err(1, "error reading from %s", from);
2185	if ((fclose(src)) != 0)
2186		err(1, "can't fclose %s", to);
2187	if ((fclose(dst)) != 0)
2188		err(1, "can't fclose %s", from);
2189}
2190
2191/* create one or more directory components of a path */
2192static void
2193createdir(const struct conf_entry *ent, char *dirpart)
2194{
2195	int res;
2196	char *s, *d;
2197	char mkdirpath[MAXPATHLEN];
2198	struct stat st;
2199
2200	s = dirpart;
2201	d = mkdirpath;
2202
2203	for (;;) {
2204		*d++ = *s++;
2205		if (*s != '/' && *s != '\0')
2206			continue;
2207		*d = '\0';
2208		res = lstat(mkdirpath, &st);
2209		if (res != 0) {
2210			if (noaction) {
2211				printf("\tmkdir %s\n", mkdirpath);
2212			} else {
2213				res = mkdir(mkdirpath, 0755);
2214				if (res != 0)
2215					err(1, "Error on mkdir(\"%s\") for -a",
2216					    mkdirpath);
2217			}
2218		}
2219		if (*s == '\0')
2220			break;
2221	}
2222	if (verbose) {
2223		if (ent->firstcreate)
2224			printf("Created directory '%s' for new %s\n",
2225			    dirpart, ent->log);
2226		else
2227			printf("Created directory '%s' for -a\n", dirpart);
2228	}
2229}
2230
2231/*
2232 * Create a new log file, destroying any currently-existing version
2233 * of the log file in the process.  If the caller wants a backup copy
2234 * of the file to exist, they should call 'link(logfile,logbackup)'
2235 * before calling this routine.
2236 */
2237void
2238createlog(const struct conf_entry *ent)
2239{
2240	int fd, failed;
2241	struct stat st;
2242	char *realfile, *slash, tempfile[MAXPATHLEN];
2243
2244	fd = -1;
2245	realfile = ent->log;
2246
2247	/*
2248	 * If this log file is being created for the first time (-C option),
2249	 * then it may also be true that the parent directory does not exist
2250	 * yet.  Check, and create that directory if it is missing.
2251	 */
2252	if (ent->firstcreate) {
2253		strlcpy(tempfile, realfile, sizeof(tempfile));
2254		slash = strrchr(tempfile, '/');
2255		if (slash != NULL) {
2256			*slash = '\0';
2257			failed = stat(tempfile, &st);
2258			if (failed && errno != ENOENT)
2259				err(1, "Error on stat(%s)", tempfile);
2260			if (failed)
2261				createdir(ent, tempfile);
2262			else if (!S_ISDIR(st.st_mode))
2263				errx(1, "%s exists but is not a directory",
2264				    tempfile);
2265		}
2266	}
2267
2268	/*
2269	 * First create an unused filename, so it can be chown'ed and
2270	 * chmod'ed before it is moved into the real location.  mkstemp
2271	 * will create the file mode=600 & owned by us.  Note that all
2272	 * temp files will have a suffix of '.z<something>'.
2273	 */
2274	strlcpy(tempfile, realfile, sizeof(tempfile));
2275	strlcat(tempfile, ".zXXXXXX", sizeof(tempfile));
2276	if (noaction)
2277		printf("\tmktemp %s\n", tempfile);
2278	else {
2279		fd = mkstemp(tempfile);
2280		if (fd < 0)
2281			err(1, "can't mkstemp logfile %s", tempfile);
2282
2283		/*
2284		 * Add status message to what will become the new log file.
2285		 */
2286		if (!(ent->flags & CE_BINARY)) {
2287			if (log_trim(tempfile, ent))
2288				err(1, "can't add status message to log");
2289		}
2290	}
2291
2292	/* Change the owner/group, if we are supposed to */
2293	if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2294		if (noaction)
2295			printf("\tchown %u:%u %s\n", ent->uid, ent->gid,
2296			    tempfile);
2297		else {
2298			failed = fchown(fd, ent->uid, ent->gid);
2299			if (failed)
2300				err(1, "can't fchown temp file %s", tempfile);
2301		}
2302	}
2303
2304	/* Turn on NODUMP if it was requested in the config-file. */
2305	if (ent->flags & CE_NODUMP) {
2306		if (noaction)
2307			printf("\tchflags nodump %s\n", tempfile);
2308		else {
2309			failed = fchflags(fd, UF_NODUMP);
2310			if (failed) {
2311				warn("log_trim: fchflags(NODUMP)");
2312			}
2313		}
2314	}
2315
2316	/*
2317	 * Note that if the real logfile still exists, and if the call
2318	 * to rename() fails, then "neither the old file nor the new
2319	 * file shall be changed or created" (to quote the standard).
2320	 * If the call succeeds, then the file will be replaced without
2321	 * any window where some other process might find that the file
2322	 * did not exist.
2323	 * XXX - ? It may be that for some error conditions, we could
2324	 *	retry by first removing the realfile and then renaming.
2325	 */
2326	if (noaction) {
2327		printf("\tchmod %o %s\n", ent->permissions, tempfile);
2328		printf("\tmv %s %s\n", tempfile, realfile);
2329	} else {
2330		failed = fchmod(fd, ent->permissions);
2331		if (failed)
2332			err(1, "can't fchmod temp file '%s'", tempfile);
2333		failed = rename(tempfile, realfile);
2334		if (failed)
2335			err(1, "can't mv %s to %s", tempfile, realfile);
2336	}
2337
2338	if (fd >= 0)
2339		close(fd);
2340}
2341
2342static void
2343change_attrs(const char *fname, const struct conf_entry *ent)
2344{
2345	int failed;
2346
2347	if (noaction) {
2348		printf("\tchmod %o %s\n", ent->permissions, fname);
2349
2350		if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1)
2351			printf("\tchown %u:%u %s\n",
2352			    ent->uid, ent->gid, fname);
2353
2354		if (ent->flags & CE_NODUMP)
2355			printf("\tchflags nodump %s\n", fname);
2356		return;
2357	}
2358
2359	failed = chmod(fname, ent->permissions);
2360	if (failed)
2361		warn("can't chmod %s", fname);
2362
2363	if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2364		failed = chown(fname, ent->uid, ent->gid);
2365		if (failed)
2366			warn("can't chown %s", fname);
2367	}
2368
2369	if (ent->flags & CE_NODUMP) {
2370		failed = chflags(fname, UF_NODUMP);
2371		if (failed)
2372			warn("can't chflags %s NODUMP", fname);
2373	}
2374}
2375