text: /*-
   * ------+---------+---------+-------- + --------+---------+---------+---------*
   * This file includes significant modifications done by:
   * Copyright (c) 2003, 2004  - Garance Alistair Drosehn <gad@FreeBSD.org>.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *   1. Redistributions of source code must retain the above copyright
   *      notice, this list of conditions and the following disclaimer.
   *   2. Redistributions in binary form must reproduce the above copyright
   *      notice, this list of conditions and the following disclaimer in the
   *      documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   * ------+---------+---------+-------- + --------+---------+---------+---------*
   */
  
  /*
   * This file contains changes from the Open Software Foundation.
   */
  
  /*
   * Copyright 1988, 1989 by the Massachusetts Institute of Technology
   *
   * Permission to use, copy, modify, and distribute this software and its
   * documentation for any purpose and without fee is hereby granted, provided
   * that the above copyright notice appear in all copies and that both that
   * copyright notice and this permission notice appear in supporting
   * documentation, and that the names of M.I.T. and the M.I.T. S.I.P.B. not be
   * used in advertising or publicity pertaining to distribution of the
   * software without specific, written prior permission. M.I.T. and the M.I.T.
   * S.I.P.B. make no representations about the suitability of this software
   * for any purpose.  It is provided "as is" without express or implied
   * warranty.
   *
   */
  
  /*
   * newsyslog - roll over selected logs at the appropriate time, keeping the a
   * specified number of backup files around.
   */
  
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: releng/11.0/usr.sbin/newsyslog/newsyslog.c 301532 2016-06-06 22:54:08Z vangyzen $");
  
  #define	OSF
  
  #include <sys/param.h>
  #include <sys/queue.h>
  #include <sys/stat.h>
  #include <sys/wait.h>
  
  #include <assert.h>
  #include <ctype.h>
  #include <err.h>
  #include <errno.h>
  #include <dirent.h>
  #include <fcntl.h>
  #include <fnmatch.h>
  #include <glob.h>
  #include <grp.h>
  #include <paths.h>
  #include <pwd.h>
  #include <signal.h>
  #include <stdio.h>
  #include <libgen.h>
  #include <stdlib.h>
  #include <string.h>
  #include <time.h>
  #include <unistd.h>
  
  #include "pathnames.h"
  #include "extern.h"
  
  /*
   * Compression suffixes
   */
  #ifndef	COMPRESS_SUFFIX_GZ
  #define	COMPRESS_SUFFIX_GZ	".gz"
  #endif
  
  #ifndef	COMPRESS_SUFFIX_BZ2
  #define	COMPRESS_SUFFIX_BZ2	".bz2"
  #endif
  
  #ifndef	COMPRESS_SUFFIX_XZ
  #define	COMPRESS_SUFFIX_XZ	".xz"
  #endif
  
  #define	COMPRESS_SUFFIX_MAXLEN	MAX(MAX(sizeof(COMPRESS_SUFFIX_GZ),sizeof(COMPRESS_SUFFIX_BZ2)),sizeof(COMPRESS_SUFFIX_XZ))
  
  /*
   * Compression types
   */
  #define	COMPRESS_TYPES  4	/* Number of supported compression types */
  
  #define	COMPRESS_NONE	0
  #define	COMPRESS_GZIP	1
  #define	COMPRESS_BZIP2	2
  #define	COMPRESS_XZ	3
  
  /*
   * Bit-values for the 'flags' parsed from a config-file entry.
   */
  #define	CE_BINARY	0x0008	/* Logfile is in binary, do not add status */
  				/*    messages to logfile(s) when rotating. */
  #define	CE_NOSIGNAL	0x0010	/* There is no process to signal when */
  				/*    trimming this file. */
  #define	CE_TRIMAT	0x0020	/* trim file at a specific time. */
  #define	CE_GLOB		0x0040	/* name of the log is file name pattern. */
  #define	CE_SIGNALGROUP	0x0080	/* Signal a process-group instead of a single */
  				/*    process when trimming this file. */
  #define	CE_CREATE	0x0100	/* Create the log file if it does not exist. */
  #define	CE_NODUMP	0x0200	/* Set 'nodump' on newly created log file. */
  #define	CE_PID2CMD	0x0400	/* Replace PID file with a shell command.*/
  
  #define	MIN_PID         5	/* Don't touch pids lower than this */
  #define	MAX_PID		99999	/* was lower, see /usr/include/sys/proc.h */
  
  #define	kbytes(size)  (((size) + 1023) >> 10)
  
  #define	DEFAULT_MARKER	"<default>"
  #define	DEBUG_MARKER	"<debug>"
  #define	INCLUDE_MARKER	"<include>"
  #define	DEFAULT_TIMEFNAME_FMT	"%Y%m%dT%H%M%S"
  
  #define	MAX_OLDLOGS 65536	/* Default maximum number of old logfiles */
  
  struct compress_types {
  	const char *flag;	/* Flag in configuration file */
  	const char *suffix;	/* Compression suffix */
  	const char *path;	/* Path to compression program */
  };
  
  static const struct compress_types compress_type[COMPRESS_TYPES] = {
  	{ "", "", "" },					/* no compression */
  	{ "Z", COMPRESS_SUFFIX_GZ, _PATH_GZIP },	/* gzip compression */
  	{ "J", COMPRESS_SUFFIX_BZ2, _PATH_BZIP2 },	/* bzip2 compression */
  	{ "X", COMPRESS_SUFFIX_XZ, _PATH_XZ }		/* xz compression */
  };
  
  struct conf_entry {
  	STAILQ_ENTRY(conf_entry) cf_nextp;
  	char *log;		/* Name of the log */
  	char *pid_cmd_file;		/* PID or command file */
  	char *r_reason;		/* The reason this file is being rotated */
  	int firstcreate;	/* Creating log for the first time (-C). */
  	int rotate;		/* Non-zero if this file should be rotated */
  	int fsize;		/* size found for the log file */
  	uid_t uid;		/* Owner of log */
  	gid_t gid;		/* Group of log */
  	int numlogs;		/* Number of logs to keep */
  	int trsize;		/* Size cutoff to trigger trimming the log */
  	int hours;		/* Hours between log trimming */
  	struct ptime_data *trim_at;	/* Specific time to do trimming */
  	unsigned int permissions;	/* File permissions on the log */
  	int flags;		/* CE_BINARY */
  	int compress;		/* Compression */
  	int sig;		/* Signal to send */
  	int def_cfg;		/* Using the <default> rule for this file */
  };
  
  struct sigwork_entry {
  	SLIST_ENTRY(sigwork_entry) sw_nextp;
  	int	 sw_signum;		/* the signal to send */
  	int	 sw_pidok;		/* true if pid value is valid */
  	pid_t	 sw_pid;		/* the process id from the PID file */
  	const char *sw_pidtype;		/* "daemon" or "process group" */
  	int	 sw_runcmd;		/* run command or send PID to signal */
  	char	 sw_fname[1];		/* file the PID was read from or shell cmd */
  };
  
  struct zipwork_entry {
  	SLIST_ENTRY(zipwork_entry) zw_nextp;
  	const struct conf_entry *zw_conf;	/* for chown/perm/flag info */
  	const struct sigwork_entry *zw_swork;	/* to know success of signal */
  	int	 zw_fsize;		/* size of the file to compress */
  	char	 zw_fname[1];		/* the file to compress */
  };
  
  struct include_entry {
  	STAILQ_ENTRY(include_entry) inc_nextp;
  	const char *file;	/* Name of file to process */
  };
  
  struct oldlog_entry {
  	char *fname;		/* Filename of the log file */
  	time_t t;		/* Parsed timestamp of the logfile */
  };
  
  typedef enum {
  	FREE_ENT, KEEP_ENT
  }	fk_entry;
  
  STAILQ_HEAD(cflist, conf_entry);
  static SLIST_HEAD(swlisthead, sigwork_entry) swhead =
      SLIST_HEAD_INITIALIZER(swhead);
  static SLIST_HEAD(zwlisthead, zipwork_entry) zwhead =
      SLIST_HEAD_INITIALIZER(zwhead);
  STAILQ_HEAD(ilist, include_entry);
  
  int dbg_at_times;		/* -D Show details of 'trim_at' code */
  
  static int archtodir = 0;	/* Archive old logfiles to other directory */
  static int createlogs;		/* Create (non-GLOB) logfiles which do not */
  				/*    already exist.  1=='for entries with */
  				/*    C flag', 2=='for all entries'. */
  int verbose = 0;		/* Print out what's going on */
  static int needroot = 1;	/* Root privs are necessary */
  int noaction = 0;		/* Don't do anything, just show it */
  static int norotate = 0;	/* Don't rotate */
  static int nosignal;		/* Do not send any signals */
  static int enforcepid = 0;	/* If PID file does not exist or empty, do nothing */
  static int force = 0;		/* Force the trim no matter what */
  static int rotatereq = 0;	/* -R = Always rotate the file(s) as given */
  				/*    on the command (this also requires   */
  				/*    that a list of files *are* given on  */
  				/*    the run command). */
  static char *requestor;		/* The name given on a -R request */
  static char *timefnamefmt = NULL;/* Use time based filenames instead of .0 */
  static char *archdirname;	/* Directory path to old logfiles archive */
  static char *destdir = NULL;	/* Directory to treat at root for logs */
  static const char *conf;	/* Configuration file to use */
  
  struct ptime_data *dbg_timenow;	/* A "timenow" value set via -D option */
  static struct ptime_data *timenow; /* The time to use for checking at-fields */
  
  #define	DAYTIME_LEN	16
  static char daytime[DAYTIME_LEN];/* The current time in human readable form,
  				  * used for rotation-tracking messages. */
  static char hostname[MAXHOSTNAMELEN]; /* hostname */
  
  static const char *path_syslogpid = _PATH_SYSLOGPID;
  
  static struct cflist *get_worklist(char **files);
  static void parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p,
  		    struct conf_entry *defconf_p, struct ilist *inclist);
  static void add_to_queue(const char *fname, struct ilist *inclist);
  static char *sob(char *p);
  static char *son(char *p);
  static int isnumberstr(const char *);
  static int isglobstr(const char *);
  static char *missing_field(char *p, char *errline);
  static void	 change_attrs(const char *, const struct conf_entry *);
  static const char *get_logfile_suffix(const char *logfile);
  static fk_entry	 do_entry(struct conf_entry *);
  static fk_entry	 do_rotate(const struct conf_entry *);
  static void	 do_sigwork(struct sigwork_entry *);
  static void	 do_zipwork(struct zipwork_entry *);
  static struct sigwork_entry *
  		 save_sigwork(const struct conf_entry *);
  static struct zipwork_entry *
  		 save_zipwork(const struct conf_entry *, const struct
  		    sigwork_entry *, int, const char *);
  static void	 set_swpid(struct sigwork_entry *, const struct conf_entry *);
  static int	 sizefile(const char *);
  static void expand_globs(struct cflist *work_p, struct cflist *glob_p);
  static void free_clist(struct cflist *list);
  static void free_entry(struct conf_entry *ent);
  static struct conf_entry *init_entry(const char *fname,
  		struct conf_entry *src_entry);
  static void parse_args(int argc, char **argv);
  static int parse_doption(const char *doption);
  static void usage(void);
  static int log_trim(const char *logname, const struct conf_entry *log_ent);
  static int age_old_log(const char *file);
  static void savelog(char *from, char *to);
  static void createdir(const struct conf_entry *ent, char *dirpart);
  static void createlog(const struct conf_entry *ent);
  static int parse_signal(const char *str);
  
  /*
   * All the following take a parameter of 'int', but expect values in the
   * range of unsigned char.  Define wrappers which take values of type 'char',
   * whether signed or unsigned, and ensure they end up in the right range.
   */
  #define	isdigitch(Anychar) isdigit((u_char)(Anychar))
  #define	isprintch(Anychar) isprint((u_char)(Anychar))
  #define	isspacech(Anychar) isspace((u_char)(Anychar))
  #define	tolowerch(Anychar) tolower((u_char)(Anychar))
  
  int
  main(int argc, char **argv)
  {
  	struct cflist *worklist;
  	struct conf_entry *p;
  	struct sigwork_entry *stmp;
  	struct zipwork_entry *ztmp;
  
  	SLIST_INIT(&swhead);
  	SLIST_INIT(&zwhead);
  
  	parse_args(argc, argv);
  	argc -= optind;
  	argv += optind;
  
  	if (needroot && getuid() && geteuid())
  		errx(1, "must have root privs");
  	worklist = get_worklist(argv);
  
  	/*
  	 * Rotate all the files which need to be rotated.  Note that
  	 * some users have *hundreds* of entries in newsyslog.conf!
  	 */
  	while (!STAILQ_EMPTY(worklist)) {
  		p = STAILQ_FIRST(worklist);
  		STAILQ_REMOVE_HEAD(worklist, cf_nextp);
  		if (do_entry(p) == FREE_ENT)
  			free_entry(p);
  	}
  
  	/*
  	 * Send signals to any processes which need a signal to tell
  	 * them to close and re-open the log file(s) we have rotated.
  	 * Note that zipwork_entries include pointers to these
  	 * sigwork_entry's, so we can not free the entries here.
  	 */
  	if (!SLIST_EMPTY(&swhead)) {
  		if (noaction || verbose)
  			printf("Signal all daemon process(es)...\n");
  		SLIST_FOREACH(stmp, &swhead, sw_nextp)
  			do_sigwork(stmp);
  		if (!(rotatereq && nosignal)) {
  			if (noaction)
  				printf("\tsleep 10\n");
  			else {
  				if (verbose)
  					printf("Pause 10 seconds to allow "
  					    "daemon(s) to close log file(s)\n");
  				sleep(10);
  			}
  		}
  	}
  	/*
  	 * Compress all files that we're expected to compress, now
  	 * that all processes should have closed the files which
  	 * have been rotated.
  	 */
  	if (!SLIST_EMPTY(&zwhead)) {
  		if (noaction || verbose)
  			printf("Compress all rotated log file(s)...\n");
  		while (!SLIST_EMPTY(&zwhead)) {
  			ztmp = SLIST_FIRST(&zwhead);
  			do_zipwork(ztmp);
  			SLIST_REMOVE_HEAD(&zwhead, zw_nextp);
  			free(ztmp);
  		}
  	}
  	/* Now free all the sigwork entries. */
  	while (!SLIST_EMPTY(&swhead)) {
  		stmp = SLIST_FIRST(&swhead);
  		SLIST_REMOVE_HEAD(&swhead, sw_nextp);
  		free(stmp);
  	}
  
  	while (wait(NULL) > 0 || errno == EINTR)
  		;
  	return (0);
  }
  
  static struct conf_entry *
  init_entry(const char *fname, struct conf_entry *src_entry)
  {
  	struct conf_entry *tempwork;
  
  	if (verbose > 4)
  		printf("\t--> [creating entry for %s]\n", fname);
  
  	tempwork = malloc(sizeof(struct conf_entry));
  	if (tempwork == NULL)
  		err(1, "malloc of conf_entry for %s", fname);
  
  	if (destdir == NULL || fname[0] != '/')
  		tempwork->log = strdup(fname);
  	else
  		asprintf(&tempwork->log, "%s%s", destdir, fname);
  	if (tempwork->log == NULL)
  		err(1, "strdup for %s", fname);
  
  	if (src_entry != NULL) {
  		tempwork->pid_cmd_file = NULL;
  		if (src_entry->pid_cmd_file)
  			tempwork->pid_cmd_file = strdup(src_entry->pid_cmd_file);
  		tempwork->r_reason = NULL;
  		tempwork->firstcreate = 0;
  		tempwork->rotate = 0;
  		tempwork->fsize = -1;
  		tempwork->uid = src_entry->uid;
  		tempwork->gid = src_entry->gid;
  		tempwork->numlogs = src_entry->numlogs;
  		tempwork->trsize = src_entry->trsize;
  		tempwork->hours = src_entry->hours;
  		tempwork->trim_at = NULL;
  		if (src_entry->trim_at != NULL)
  			tempwork->trim_at = ptime_init(src_entry->trim_at);
  		tempwork->permissions = src_entry->permissions;
  		tempwork->flags = src_entry->flags;
  		tempwork->compress = src_entry->compress;
  		tempwork->sig = src_entry->sig;
  		tempwork->def_cfg = src_entry->def_cfg;
  	} else {
  		/* Initialize as a "do-nothing" entry */
  		tempwork->pid_cmd_file = NULL;
  		tempwork->r_reason = NULL;
  		tempwork->firstcreate = 0;
  		tempwork->rotate = 0;
  		tempwork->fsize = -1;
  		tempwork->uid = (uid_t)-1;
  		tempwork->gid = (gid_t)-1;
  		tempwork->numlogs = 1;
  		tempwork->trsize = -1;
  		tempwork->hours = -1;
  		tempwork->trim_at = NULL;
  		tempwork->permissions = 0;
  		tempwork->flags = 0;
  		tempwork->compress = COMPRESS_NONE;
  		tempwork->sig = SIGHUP;
  		tempwork->def_cfg = 0;
  	}
  
  	return (tempwork);
  }
  
  static void
  free_entry(struct conf_entry *ent)
  {
  
  	if (ent == NULL)
  		return;
  
  	if (ent->log != NULL) {
  		if (verbose > 4)
  			printf("\t--> [freeing entry for %s]\n", ent->log);
  		free(ent->log);
  		ent->log = NULL;
  	}
  
  	if (ent->pid_cmd_file != NULL) {
  		free(ent->pid_cmd_file);
  		ent->pid_cmd_file = NULL;
  	}
  
  	if (ent->r_reason != NULL) {
  		free(ent->r_reason);
  		ent->r_reason = NULL;
  	}
  
  	if (ent->trim_at != NULL) {
  		ptime_free(ent->trim_at);
  		ent->trim_at = NULL;
  	}
  
  	free(ent);
  }
  
  static void
  free_clist(struct cflist *list)
  {
  	struct conf_entry *ent;
  
  	while (!STAILQ_EMPTY(list)) {
  		ent = STAILQ_FIRST(list);
  		STAILQ_REMOVE_HEAD(list, cf_nextp);
  		free_entry(ent);
  	}
  
  	free(list);
  	list = NULL;
  }
  
  static fk_entry
  do_entry(struct conf_entry * ent)
  {
  #define	REASON_MAX	80
  	int modtime;
  	fk_entry free_or_keep;
  	double diffsecs;
  	char temp_reason[REASON_MAX];
  	int oversized;
  
  	free_or_keep = FREE_ENT;
  	if (verbose)
  		printf("%s <%d%s>: ", ent->log, ent->numlogs,
  		    compress_type[ent->compress].flag);
  	ent->fsize = sizefile(ent->log);
  	oversized = ((ent->trsize > 0) && (ent->fsize >= ent->trsize));
  	modtime = age_old_log(ent->log);
  	ent->rotate = 0;
  	ent->firstcreate = 0;
  	if (ent->fsize < 0) {
  		/*
  		 * If either the C flag or the -C option was specified,
  		 * and if we won't be creating the file, then have the
  		 * verbose message include a hint as to why the file
  		 * will not be created.
  		 */
  		temp_reason[0] = '\0';
  		if (createlogs > 1)
  			ent->firstcreate = 1;
  		else if ((ent->flags & CE_CREATE) && createlogs)
  			ent->firstcreate = 1;
  		else if (ent->flags & CE_CREATE)
  			strlcpy(temp_reason, " (no -C option)", REASON_MAX);
  		else if (createlogs)
  			strlcpy(temp_reason, " (no C flag)", REASON_MAX);
  
  		if (ent->firstcreate) {
  			if (verbose)
  				printf("does not exist -> will create.\n");
  			createlog(ent);
  		} else if (verbose) {
  			printf("does not exist, skipped%s.\n", temp_reason);
  		}
  	} else {
  		if (ent->flags & CE_TRIMAT && !force && !rotatereq &&
  		    !oversized) {
  			diffsecs = ptimeget_diff(timenow, ent->trim_at);
  			if (diffsecs < 0.0) {
  				/* trim_at is some time in the future. */
  				if (verbose) {
  					ptime_adjust4dst(ent->trim_at,
  					    timenow);
  					printf("--> will trim at %s",
  					    ptimeget_ctime(ent->trim_at));
  				}
  				return (free_or_keep);
  			} else if (diffsecs >= 3600.0) {
  				/*
  				 * trim_at is more than an hour in the past,
  				 * so find the next valid trim_at time, and
  				 * tell the user what that will be.
  				 */
  				if (verbose && dbg_at_times)
  					printf("\n\t--> prev trim at %s\t",
  					    ptimeget_ctime(ent->trim_at));
  				if (verbose) {
  					ptimeset_nxtime(ent->trim_at);
  					printf("--> will trim at %s",
  					    ptimeget_ctime(ent->trim_at));
  				}
  				return (free_or_keep);
  			} else if (verbose && noaction && dbg_at_times) {
  				/*
  				 * If we are just debugging at-times, then
  				 * a detailed message is helpful.  Also
  				 * skip "doing" any commands, since they
  				 * would all be turned off by no-action.
  				 */
  				printf("\n\t--> timematch at %s",
  				    ptimeget_ctime(ent->trim_at));
  				return (free_or_keep);
  			} else if (verbose && ent->hours <= 0) {
  				printf("--> time is up\n");
  			}
  		}
  		if (verbose && (ent->trsize > 0))
  			printf("size (Kb): %d [%d] ", ent->fsize, ent->trsize);
  		if (verbose && (ent->hours > 0))
  			printf(" age (hr): %d [%d] ", modtime, ent->hours);
  
  		/*
  		 * Figure out if this logfile needs to be rotated.
  		 */
  		temp_reason[0] = '\0';
  		if (rotatereq) {
  			ent->rotate = 1;
  			snprintf(temp_reason, REASON_MAX, " due to -R from %s",
  			    requestor);
  		} else if (force) {
  			ent->rotate = 1;
  			snprintf(temp_reason, REASON_MAX, " due to -F request");
  		} else if (oversized) {
  			ent->rotate = 1;
  			snprintf(temp_reason, REASON_MAX, " due to size>%dK",
  			    ent->trsize);
  		} else if (ent->hours <= 0 && (ent->flags & CE_TRIMAT)) {
  			ent->rotate = 1;
  		} else if ((ent->hours > 0) && ((modtime >= ent->hours) ||
  		    (modtime < 0))) {
  			ent->rotate = 1;
  		}
  
  		/*
  		 * If the file needs to be rotated, then rotate it.
  		 */
  		if (ent->rotate && !norotate) {
  			if (temp_reason[0] != '\0')
  				ent->r_reason = strdup(temp_reason);
  			if (verbose)
  				printf("--> trimming log....\n");
  			if (noaction && !verbose)
  				printf("%s <%d%s>: trimming\n", ent->log,
  				    ent->numlogs,
  				    compress_type[ent->compress].flag);
  			free_or_keep = do_rotate(ent);
  		} else {
  			if (verbose)
  				printf("--> skipping\n");
  		}
  	}
  	return (free_or_keep);
  #undef REASON_MAX
  }
  
  static void
  parse_args(int argc, char **argv)
  {
  	int ch;
  	char *p;
  
  	timenow = ptime_init(NULL);
  	ptimeset_time(timenow, time(NULL));
  	strlcpy(daytime, ptimeget_ctime(timenow) + 4, DAYTIME_LEN);
  
  	/* Let's get our hostname */
  	(void)gethostname(hostname, sizeof(hostname));
  
  	/* Truncate domain */
  	if ((p = strchr(hostname, '.')) != NULL)
  		*p = '\0';
  
  	/* Parse command line options. */
  	while ((ch = getopt(argc, argv, "a:d:f:nrst:vCD:FNPR:S:")) != -1)
  		switch (ch) {
  		case 'a':
  			archtodir++;
  			archdirname = optarg;
  			break;
  		case 'd':
  			destdir = optarg;
  			break;
  		case 'f':
  			conf = optarg;
  			break;
  		case 'n':
  			noaction++;
  			/* FALLTHROUGH */
  		case 'r':
  			needroot = 0;
  			break;
  		case 's':
  			nosignal = 1;
  			break;
  		case 't':
  			if (optarg[0] == '\0' ||
  			    strcmp(optarg, "DEFAULT") == 0)
  				timefnamefmt = strdup(DEFAULT_TIMEFNAME_FMT);
  			else
  				timefnamefmt = strdup(optarg);
  			break;
  		case 'v':
  			verbose++;
  			break;
  		case 'C':
  			/* Useful for things like rc.diskless... */
  			createlogs++;
  			break;
  		case 'D':
  			/*
  			 * Set some debugging option.  The specific option
  			 * depends on the value of optarg.  These options
  			 * may come and go without notice or documentation.
  			 */
  			if (parse_doption(optarg))
  				break;
  			usage();
  			/* NOTREACHED */
  		case 'F':
  			force++;
  			break;
  		case 'N':
  			norotate++;
  			break;
  		case 'P':
  			enforcepid++;
  			break;
  		case 'R':
  			rotatereq++;
  			requestor = strdup(optarg);
  			break;
  		case 'S':
  			path_syslogpid = optarg;
  			break;
  		case 'm':	/* Used by OpenBSD for "monitor mode" */
  		default:
  			usage();
  			/* NOTREACHED */
  		}
  
  	if (force && norotate) {
  		warnx("Only one of -F and -N may be specified.");
  		usage();
  		/* NOTREACHED */
  	}
  
  	if (rotatereq) {
  		if (optind == argc) {
  			warnx("At least one filename must be given when -R is specified.");
  			usage();
  			/* NOTREACHED */
  		}
  		/* Make sure "requestor" value is safe for a syslog message. */
  		for (p = requestor; *p != '\0'; p++) {
  			if (!isprintch(*p) && (*p != '\t'))
  				*p = '.';
  		}
  	}
  
  	if (dbg_timenow) {
  		/*
  		 * Note that the 'daytime' variable is not changed.
  		 * That is only used in messages that track when a
  		 * logfile is rotated, and if a file *is* rotated,
  		 * then it will still rotated at the "real now" time.
  		 */
  		ptime_free(timenow);
  		timenow = dbg_timenow;
  		fprintf(stderr, "Debug: Running as if TimeNow is %s",
  		    ptimeget_ctime(dbg_timenow));
  	}
  
  }
  
  /*
   * These debugging options are mainly meant for developer use, such
   * as writing regression-tests.  They would not be needed by users
   * during normal operation of newsyslog...
   */
  static int
  parse_doption(const char *doption)
  {
  	const char TN[] = "TN=";
  	int res;
  
  	if (strncmp(doption, TN, sizeof(TN) - 1) == 0) {
  		/*
  		 * The "TimeNow" debugging option.  This might be off
  		 * by an hour when crossing a timezone change.
  		 */
  		dbg_timenow = ptime_init(NULL);
  		res = ptime_relparse(dbg_timenow, PTM_PARSE_ISO8601,
  		    time(NULL), doption + sizeof(TN) - 1);
  		if (res == -2) {
  			warnx("Non-existent time specified on -D %s", doption);
  			return (0);			/* failure */
  		} else if (res < 0) {
  			warnx("Malformed time given on -D %s", doption);
  			return (0);			/* failure */
  		}
  		return (1);			/* successfully parsed */
  
  	}
  
  	if (strcmp(doption, "ats") == 0) {
  		dbg_at_times++;
  		return (1);			/* successfully parsed */
  	}
  
  	/* XXX - This check could probably be dropped. */
  	if ((strcmp(doption, "neworder") == 0) || (strcmp(doption, "oldorder")
  	    == 0)) {
  		warnx("NOTE: newsyslog always uses 'neworder'.");
  		return (1);			/* successfully parsed */
  	}
  
  	warnx("Unknown -D (debug) option: '%s'", doption);
  	return (0);				/* failure */
  }
  
  static void
  usage(void)
  {
  
  	fprintf(stderr,
  	    "usage: newsyslog [-CFNPnrsv] [-a directory] [-d directory] [-f config_file]\n"
  	    "                 [-S pidfile] [-t timefmt] [[-R tagname] file ...]\n");
  	exit(1);
  }
  
  /*
   * Parse a configuration file and return a linked list of all the logs
   * which should be processed.
   */
  static struct cflist *
  get_worklist(char **files)
  {
  	FILE *f;
  	char **given;
  	struct cflist *cmdlist, *filelist, *globlist;
  	struct conf_entry *defconf, *dupent, *ent;
  	struct ilist inclist;
  	struct include_entry *inc;
  	int gmatch, fnres;
  
  	defconf = NULL;
  	STAILQ_INIT(&inclist);
  
  	filelist = malloc(sizeof(struct cflist));
  	if (filelist == NULL)
  		err(1, "malloc of filelist");
  	STAILQ_INIT(filelist);
  	globlist = malloc(sizeof(struct cflist));
  	if (globlist == NULL)
  		err(1, "malloc of globlist");
  	STAILQ_INIT(globlist);
  
  	inc = malloc(sizeof(struct include_entry));
  	if (inc == NULL)
  		err(1, "malloc of inc");
  	inc->file = conf;
  	if (inc->file == NULL)
  		inc->file = _PATH_CONF;
  	STAILQ_INSERT_TAIL(&inclist, inc, inc_nextp);
  
  	STAILQ_FOREACH(inc, &inclist, inc_nextp) {
  		if (strcmp(inc->file, "-") != 0)
  			f = fopen(inc->file, "r");
  		else {
  			f = stdin;
  			inc->file = "<stdin>";
  		}
  		if (!f)
  			err(1, "%s", inc->file);
  
  		if (verbose)
  			printf("Processing %s\n", inc->file);
  		parse_file(f, filelist, globlist, defconf, &inclist);
  		(void) fclose(f);
  	}
  
  	/*
  	 * All config-file information has been read in and turned into
  	 * a filelist and a globlist.  If there were no specific files
  	 * given on the run command, then the only thing left to do is to
  	 * call a routine which finds all files matched by the globlist
  	 * and adds them to the filelist.  Then return the worklist.
  	 */
  	if (*files == NULL) {
  		expand_globs(filelist, globlist);
  		free_clist(globlist);
  		if (defconf != NULL)
  			free_entry(defconf);
  		return (filelist);
  		/* NOTREACHED */
  	}
  
  	/*
  	 * If newsyslog was given a specific list of files to process,
  	 * it may be that some of those files were not listed in any
  	 * config file.  Those unlisted files should get the default
  	 * rotation action.  First, create the default-rotation action
  	 * if none was found in a system config file.
  	 */
  	if (defconf == NULL) {
  		defconf = init_entry(DEFAULT_MARKER, NULL);
  		defconf->numlogs = 3;
  		defconf->trsize = 50;
  		defconf->permissions = S_IRUSR|S_IWUSR;
  	}
  
  	/*
  	 * If newsyslog was run with a list of specific filenames,
  	 * then create a new worklist which has only those files in
  	 * it, picking up the rotation-rules for those files from
  	 * the original filelist.
  	 *
  	 * XXX - Note that this will copy multiple rules for a single
  	 *	logfile, if multiple entries are an exact match for
  	 *	that file.  That matches the historic behavior, but do
  	 *	we want to continue to allow it?  If so, it should
  	 *	probably be handled more intelligently.
  	 */
  	cmdlist = malloc(sizeof(struct cflist));
  	if (cmdlist == NULL)
  		err(1, "malloc of cmdlist");
  	STAILQ_INIT(cmdlist);
  
  	for (given = files; *given; ++given) {
  		/*
  		 * First try to find exact-matches for this given file.
  		 */
  		gmatch = 0;
  		STAILQ_FOREACH(ent, filelist, cf_nextp) {
  			if (strcmp(ent->log, *given) == 0) {
  				gmatch++;
  				dupent = init_entry(*given, ent);
  				STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
  			}
  		}
  		if (gmatch) {
  			if (verbose > 2)
  				printf("\t+ Matched entry %s\n", *given);
  			continue;
  		}
  
  		/*
  		 * There was no exact-match for this given file, so look
  		 * for a "glob" entry which does match.
  		 */
  		gmatch = 0;
  		if (verbose > 2 && globlist != NULL)
  			printf("\t+ Checking globs for %s\n", *given);
  		STAILQ_FOREACH(ent, globlist, cf_nextp) {
  			fnres = fnmatch(ent->log, *given, FNM_PATHNAME);
  			if (verbose > 2)
  				printf("\t+    = %d for pattern %s\n", fnres,
  				    ent->log);
  			if (fnres == 0) {
  				gmatch++;
  				dupent = init_entry(*given, ent);
  				/* This new entry is not a glob! */
  				dupent->flags &= ~CE_GLOB;
  				STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
  				/* Only allow a match to one glob-entry */
  				break;
  			}
  		}
  		if (gmatch) {
  			if (verbose > 2)
  				printf("\t+ Matched %s via %s\n", *given,
  				    ent->log);
  			continue;
  		}
  
  		/*
  		 * This given file was not found in any config file, so
  		 * add a worklist item based on the default entry.
  		 */
  		if (verbose > 2)
  			printf("\t+ No entry matched %s  (will use %s)\n",
  			    *given, DEFAULT_MARKER);
  		dupent = init_entry(*given, defconf);
  		/* Mark that it was *not* found in a config file */
  		dupent->def_cfg = 1;
  		STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
  	}
  
  	/*
  	 * Free all the entries in the original work list, the list of
  	 * glob entries, and the default entry.
  	 */
  	free_clist(filelist);
  	free_clist(globlist);
  	free_entry(defconf);
  
  	/* And finally, return a worklist which matches the given files. */
  	return (cmdlist);
  }
  
  /*
   * Expand the list of entries with filename patterns, and add all files
   * which match those glob-entries onto the worklist.
   */
  static void
  expand_globs(struct cflist *work_p, struct cflist *glob_p)
  {
  	int gmatch, gres;
  	size_t i;
  	char *mfname;
  	struct conf_entry *dupent, *ent, *globent;
  	glob_t pglob;
  	struct stat st_fm;
  
  	/*
  	 * The worklist contains all fully-specified (non-GLOB) names.
  	 *
  	 * Now expand the list of filename-pattern (GLOB) entries into
  	 * a second list, which (by definition) will only match files
  	 * that already exist.  Do not add a glob-related entry for any
  	 * file which already exists in the fully-specified list.
  	 */
  	STAILQ_FOREACH(globent, glob_p, cf_nextp) {
  		gres = glob(globent->log, GLOB_NOCHECK, NULL, &pglob);
  		if (gres != 0) {
  			warn("cannot expand pattern (%d): %s", gres,
  			    globent->log);
  			continue;
  		}
  
  		if (verbose > 2)
  			printf("\t+ Expanding pattern %s\n", globent->log);
  		for (i = 0; i < pglob.gl_matchc; i++) {
  			mfname = pglob.gl_pathv[i];
  
  			/* See if this file already has a specific entry. */
  			gmatch = 0;
  			STAILQ_FOREACH(ent, work_p, cf_nextp) {
  				if (strcmp(mfname, ent->log) == 0) {
  					gmatch++;
  					break;
  				}
  			}
  			if (gmatch)
  				continue;
  
  			/* Make sure the named matched is a file. */
  			gres = lstat(mfname, &st_fm);
  			if (gres != 0) {
  				/* Error on a file that glob() matched?!? */
  				warn("Skipping %s - lstat() error", mfname);
  				continue;
  			}
  			if (!S_ISREG(st_fm.st_mode)) {
  				/* We only rotate files! */
  				if (verbose > 2)
  					printf("\t+  . skipping %s (!file)\n",
  					    mfname);
  				continue;
  			}
  
  			if (verbose > 2)
  				printf("\t+  . add file %s\n", mfname);
  			dupent = init_entry(mfname, globent);
  			/* This new entry is not a glob! */
  			dupent->flags &= ~CE_GLOB;
  
  			/* Add to the worklist. */
  			STAILQ_INSERT_TAIL(work_p, dupent, cf_nextp);
  		}
  		globfree(&pglob);
  		if (verbose > 2)
  			printf("\t+ Done with pattern %s\n", globent->log);
  	}
  }
  
  /*
   * Parse a configuration file and update a linked list of all the logs to
   * process.
   */
  static void
  parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p,
      struct conf_entry *defconf_p, struct ilist *inclist)
  {
  	char line[BUFSIZ], *parse, *q;
  	char *cp, *errline, *group;
  	struct conf_entry *working;
  	struct passwd *pwd;
  	struct group *grp;
  	glob_t pglob;
  	int eol, ptm_opts, res, special;
  	size_t i;
  
  	errline = NULL;
  	while (fgets(line, BUFSIZ, cf)) {
  		if ((line[0] == '\n') || (line[0] == '#') ||
  		    (strlen(line) == 0))
  			continue;
  		if (errline != NULL)
  			free(errline);
  		errline = strdup(line);
  		for (cp = line + 1; *cp != '\0'; cp++) {
  			if (*cp != '#')
  				continue;
  			if (*(cp - 1) == '\\') {
  				strcpy(cp - 1, cp);
  				cp--;
  				continue;
  			}
  			*cp = '\0';
  			break;
  		}
  
  		q = parse = missing_field(sob(line), errline);
  		parse = son(line);
  		if (!*parse)
  			errx(1, "malformed line (missing fields):\n%s",
  			    errline);
  		*parse = '\0';
  
  		/*
  		 * Allow people to set debug options via the config file.
  		 * (NOTE: debug options are undocumented, and may disappear
  		 * at any time, etc).
  		 */
  		if (strcasecmp(DEBUG_MARKER, q) == 0) {
  			q = parse = missing_field(sob(parse + 1), errline);
  			parse = son(parse);
  			if (!*parse)
  				warnx("debug line specifies no option:\n%s",
  				    errline);
  			else {
  				*parse = '\0';
  				parse_doption(q);
  			}
  			continue;
  		} else if (strcasecmp(INCLUDE_MARKER, q) == 0) {
  			if (verbose)
  				printf("Found: %s", errline);
  			q = parse = missing_field(sob(parse + 1), errline);
  			parse = son(parse);
  			if (!*parse) {
  				warnx("include line missing argument:\n%s",
  				    errline);
  				continue;
  			}
  
  			*parse = '\0';
  
  			if (isglobstr(q)) {
  				res = glob(q, GLOB_NOCHECK, NULL, &pglob);
  				if (res != 0) {
  					warn("cannot expand pattern (%d): %s",
  					    res, q);
  					continue;
  				}
  
  				if (verbose > 2)
  					printf("\t+ Expanding pattern %s\n", q);
  
  				for (i = 0; i < pglob.gl_matchc; i++)
  					add_to_queue(pglob.gl_pathv[i],
  					    inclist);
  				globfree(&pglob);
  			} else
  				add_to_queue(q, inclist);
  			continue;
  		}
  
  		special = 0;
  		working = init_entry(q, NULL);
  		if (strcasecmp(DEFAULT_MARKER, q) == 0) {
  			special = 1;
  			if (defconf_p != NULL) {
  				warnx("Ignoring duplicate entry for %s!", q);
  				free_entry(working);
  				continue;
  			}
  			defconf_p = working;
  		}
  
  		q = parse = missing_field(sob(parse + 1), errline);
  		parse = son(parse);
  		if (!*parse)
  			errx(1, "malformed line (missing fields):\n%s",
  			    errline);
  		*parse = '\0';
  		if ((group = strchr(q, ':')) != NULL ||
  		    (group = strrchr(q, '.')) != NULL) {
  			*group++ = '\0';
  			if (*q) {
  				if (!(isnumberstr(q))) {
  					if ((pwd = getpwnam(q)) == NULL)
  						errx(1,
  				     "error in config file; unknown user:\n%s",
  						    errline);
  					working->uid = pwd->pw_uid;
  				} else
  					working->uid = atoi(q);
  			} else
  				working->uid = (uid_t)-1;
  
  			q = group;
  			if (*q) {
  				if (!(isnumberstr(q))) {
  					if ((grp = getgrnam(q)) == NULL)
  						errx(1,
  				    "error in config file; unknown group:\n%s",
  						    errline);
  					working->gid = grp->gr_gid;
  				} else
  					working->gid = atoi(q);
  			} else
  				working->gid = (gid_t)-1;
  
  			q = parse = missing_field(sob(parse + 1), errline);
  			parse = son(parse);
  			if (!*parse)
  				errx(1, "malformed line (missing fields):\n%s",
  				    errline);
  			*parse = '\0';
  		} else {
  			working->uid = (uid_t)-1;
  			working->gid = (gid_t)-1;
  		}
  
  		if (!sscanf(q, "%o", &working->permissions))
  			errx(1, "error in config file; bad permissions:\n%s",
  			    errline);
  
  		q = parse = missing_field(sob(parse + 1), errline);
  		parse = son(parse);
  		if (!*parse)
  			errx(1, "malformed line (missing fields):\n%s",
  			    errline);
  		*parse = '\0';
  		if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0)
  			errx(1, "error in config file; bad value for count of logs to save:\n%s",
  			    errline);
  
  		q = parse = missing_field(sob(parse + 1), errline);
  		parse = son(parse);
  		if (!*parse)
  			errx(1, "malformed line (missing fields):\n%s",
  			    errline);
  		*parse = '\0';
  		if (isdigitch(*q))
  			working->trsize = atoi(q);
  		else if (strcmp(q, "*") == 0)
  			working->trsize = -1;
  		else {
  			warnx("Invalid value of '%s' for 'size' in line:\n%s",
  			    q, errline);
  			working->trsize = -1;
  		}
  
  		working->flags = 0;
  		working->compress = COMPRESS_NONE;
  		q = parse = missing_field(sob(parse + 1), errline);
  		parse = son(parse);
  		eol = !*parse;
  		*parse = '\0';
  		{
  			char *ep;
  			u_long ul;
  
  			ul = strtoul(q, &ep, 10);
  			if (ep == q)
  				working->hours = 0;
  			else if (*ep == '*')
  				working->hours = -1;
  			else if (ul > INT_MAX)
  				errx(1, "interval is too large:\n%s", errline);
  			else
  				working->hours = ul;
  
  			if (*ep == '\0' || strcmp(ep, "*") == 0)
  				goto no_trimat;
  			if (*ep != '@' && *ep != '$')
  				errx(1, "malformed interval/at:\n%s", errline);
  
  			working->flags |= CE_TRIMAT;
  			working->trim_at = ptime_init(NULL);
  			ptm_opts = PTM_PARSE_ISO8601;
  			if (*ep == '$')
  				ptm_opts = PTM_PARSE_DWM;
  			ptm_opts |= PTM_PARSE_MATCHDOM;
  			res = ptime_relparse(working->trim_at, ptm_opts,
  			    ptimeget_secs(timenow), ep + 1);
  			if (res == -2)
  				errx(1, "nonexistent time for 'at' value:\n%s",
  				    errline);
  			else if (res < 0)
  				errx(1, "malformed 'at' value:\n%s", errline);
  		}
  no_trimat:
  
  		if (eol)
  			q = NULL;
  		else {
  			q = parse = sob(parse + 1);	/* Optional field */
  			parse = son(parse);
  			if (!*parse)
  				eol = 1;
  			*parse = '\0';
  		}
  
  		for (; q && *q && !isspacech(*q); q++) {
  			switch (tolowerch(*q)) {
  			case 'b':
  				working->flags |= CE_BINARY;
  				break;
  			case 'c':
  				working->flags |= CE_CREATE;
  				break;
  			case 'd':
  				working->flags |= CE_NODUMP;
  				break;
  			case 'g':
  				working->flags |= CE_GLOB;
  				break;
  			case 'j':
  				working->compress = COMPRESS_BZIP2;
  				break;
  			case 'n':
  				working->flags |= CE_NOSIGNAL;
  				break;
  			case 'r':
  				working->flags |= CE_PID2CMD;
  				break;
  			case 'u':
  				working->flags |= CE_SIGNALGROUP;
  				break;
  			case 'w':
  				/* Depreciated flag - keep for compatibility purposes */
  				break;
  			case 'x':
  				working->compress = COMPRESS_XZ;
  				break;
  			case 'z':
  				working->compress = COMPRESS_GZIP;
  				break;
  			case '-':
  				break;
  			case 'f':	/* Used by OpenBSD for "CE_FOLLOW" */
  			case 'm':	/* Used by OpenBSD for "CE_MONITOR" */
  			case 'p':	/* Used by NetBSD  for "CE_PLAIN0" */
  			default:
  				errx(1, "illegal flag in config file -- %c",
  				    *q);
  			}
  		}
  
  		if (eol)
  			q = NULL;
  		else {
  			q = parse = sob(parse + 1);	/* Optional field */
  			parse = son(parse);
  			if (!*parse)
  				eol = 1;
  			*parse = '\0';
  		}
  
  		working->pid_cmd_file = NULL;
  		if (q && *q) {
  			if (*q == '/')
  				working->pid_cmd_file = strdup(q);
  			else if (isalnum(*q))
  				goto got_sig;
  			else {
  				errx(1,
  			"illegal pid file or signal in config file:\n%s",
  				    errline);
  			}
  		}
  		if (eol)
  			q = NULL;
  		else {
  			q = parse = sob(parse + 1);	/* Optional field */
  			*(parse = son(parse)) = '\0';
  		}
  
  		working->sig = SIGHUP;
  		if (q && *q) {
  got_sig:
  			working->sig = parse_signal(q);
  			if (working->sig < 1 || working->sig >= sys_nsig) {
  				errx(1,
  				    "illegal signal in config file:\n%s",
  				    errline);
  			}
  		}
  
  		/*
  		 * Finish figuring out what pid-file to use (if any) in
  		 * later processing if this logfile needs to be rotated.
  		 */
  		if ((working->flags & CE_NOSIGNAL) == CE_NOSIGNAL) {
  			/*
  			 * This config-entry specified 'n' for nosignal,
  			 * see if it also specified an explicit pid_cmd_file.
  			 * This would be a pretty pointless combination.
  			 */
  			if (working->pid_cmd_file != NULL) {
  				warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s",
  				    working->pid_cmd_file, errline);
  				free(working->pid_cmd_file);
  				working->pid_cmd_file = NULL;
  			}
  		} else if (working->pid_cmd_file == NULL) {
  			/*
  			 * This entry did not specify the 'n' flag, which
  			 * means it should signal syslogd unless it had
  			 * specified some other pid-file (and obviously the
  			 * syslog pid-file will not be for a process-group).
  			 * Also, we should only try to notify syslog if we
  			 * are root.
  			 */
  			if (working->flags & CE_SIGNALGROUP) {
  				warnx("Ignoring flag 'U' in line:\n%s",
  				    errline);
  				working->flags &= ~CE_SIGNALGROUP;
  			}
  			if (needroot)
  				working->pid_cmd_file = strdup(path_syslogpid);
  		}
  
  		/*
  		 * Add this entry to the appropriate list of entries, unless
  		 * it was some kind of special entry (eg: <default>).
  		 */
  		if (special) {
  			;			/* Do not add to any list */
  		} else if (working->flags & CE_GLOB) {
  			STAILQ_INSERT_TAIL(glob_p, working, cf_nextp);
  		} else {
  			STAILQ_INSERT_TAIL(work_p, working, cf_nextp);
  		}
  	}
  	if (errline != NULL)
  		free(errline);
  }
  
  static char *
  missing_field(char *p, char *errline)
  {
  
  	if (!p || !*p)
  		errx(1, "missing field in config file:\n%s", errline);
  	return (p);
  }
  
  /*
   * In our sort we return it in the reverse of what qsort normally
   * would do, as we want the newest files first.  If we have two
   * entries with the same time we don't really care about order.
   *
   * Support function for qsort() in delete_oldest_timelog().
   */
  static int
  oldlog_entry_compare(const void *a, const void *b)
  {
  	const struct oldlog_entry *ola = a, *olb = b;
  
  	if (ola->t > olb->t)
  		return (-1);
  	else if (ola->t < olb->t)
  		return (1);
  	else
  		return (0);
  }
  
  /*
   * Check whether the file corresponding to dp is an archive of the logfile
   * logfname, based on the timefnamefmt format string. Return true and fill out
   * tm if this is the case; otherwise return false.
   */
  static int
  validate_old_timelog(int fd, const struct dirent *dp, const char *logfname,
      struct tm *tm)
  {
  	struct stat sb;
  	size_t logfname_len;
  	char *s;
  	int c;
  
  	logfname_len = strlen(logfname);
  
  	if (dp->d_type != DT_REG) {
  		/*
  		 * Some filesystems (e.g. NFS) don't fill out the d_type field
  		 * and leave it set to DT_UNKNOWN; in this case we must obtain
  		 * the file type ourselves.
  		 */
  		if (dp->d_type != DT_UNKNOWN ||
  		    fstatat(fd, dp->d_name, &sb, AT_SYMLINK_NOFOLLOW) != 0 ||
  		    !S_ISREG(sb.st_mode))
  			return (0);
  	}
  	/* Ignore everything but files with our logfile prefix. */
  	if (strncmp(dp->d_name, logfname, logfname_len) != 0)
  		return (0);
  	/* Ignore the actual non-rotated logfile. */
  	if (dp->d_namlen == logfname_len)
  		return (0);
  
  	/*
  	 * Make sure we created have found a logfile, so the
  	 * postfix is valid, IE format is: '.<time>(.[bgx]z)?'.
  	 */
  	if (dp->d_name[logfname_len] != '.') {
  		if (verbose)
  			printf("Ignoring %s which has unexpected "
  			    "extension '%s'\n", dp->d_name,
  			    &dp->d_name[logfname_len]);
  		return (0);
  	}
  	memset(tm, 0, sizeof(*tm));
  	if ((s = strptime(&dp->d_name[logfname_len + 1],
  	    timefnamefmt, tm)) == NULL) {
  		/*
  		 * We could special case "old" sequentially named logfiles here,
  		 * but we do not as that would require special handling to
  		 * decide which one was the oldest compared to "new" time based
  		 * logfiles.
  		 */
  		if (verbose)
  			printf("Ignoring %s which does not "
  			    "match time format\n", dp->d_name);
  		return (0);
  	}
  
  	for (c = 0; c < COMPRESS_TYPES; c++)
  		if (strcmp(s, compress_type[c].suffix) == 0)
  			/* We're done. */
  			return (1);
  
  	if (verbose)
  		printf("Ignoring %s which has unexpected extension '%s'\n",
  		    dp->d_name, s);
  
  	return (0);
  }
  
  /*
   * Delete the oldest logfiles, when using time based filenames.
   */
  static void
  delete_oldest_timelog(const struct conf_entry *ent, const char *archive_dir)
  {
  	char *logfname, *s, *dir, errbuf[80];
  	int dir_fd, i, logcnt, max_logcnt;
  	struct oldlog_entry *oldlogs;
  	struct dirent *dp;
  	const char *cdir;
  	struct tm tm;
  	DIR *dirp;
  
  	oldlogs = malloc(MAX_OLDLOGS * sizeof(struct oldlog_entry));
  	max_logcnt = MAX_OLDLOGS;
  	logcnt = 0;
  
  	if (archive_dir != NULL && archive_dir[0] != '\0')
  		cdir = archive_dir;
  	else
  		if ((cdir = dirname(ent->log)) == NULL)
  			err(1, "dirname()");
  	if ((dir = strdup(cdir)) == NULL)
  		err(1, "strdup()");
  
  	if ((s = basename(ent->log)) == NULL)
  		err(1, "basename()");
  	if ((logfname = strdup(s)) == NULL)
  		err(1, "strdup()");
  	if (strcmp(logfname, "/") == 0)
  		errx(1, "Invalid log filename - became '/'");
  
  	if (verbose > 2)
  		printf("Searching for old logs in %s\n", dir);
  
  	/* First we create a 'list' of all archived logfiles */
  	if ((dirp = opendir(dir)) == NULL)
  		err(1, "Cannot open log directory '%s'", dir);
  	dir_fd = dirfd(dirp);
  	while ((dp = readdir(dirp)) != NULL) {
  		if (validate_old_timelog(dir_fd, dp, logfname, &tm) == 0)
  			continue;
  
  		/*
  		 * We should now have old an old rotated logfile, so
  		 * add it to the 'list'.
  		 */
  		if ((oldlogs[logcnt].t = timegm(&tm)) == -1)
  			err(1, "Could not convert time string to time value");
  		if ((oldlogs[logcnt].fname = strdup(dp->d_name)) == NULL)
  			err(1, "strdup()");
  		logcnt++;
  
  		/*
  		 * It is very unlikely we ever run out of space in the
  		 * logfile array from the default size, but lets
  		 * handle it anyway...
  		 */
  		if (logcnt >= max_logcnt) {
  			max_logcnt *= 4;
  			/* Detect integer overflow */
  			if (max_logcnt < logcnt)
  				errx(1, "Too many old logfiles found");
  			oldlogs = realloc(oldlogs,
  			    max_logcnt * sizeof(struct oldlog_entry));
  			if (oldlogs == NULL)
  				err(1, "realloc()");
  		}
  	}
  
  	/* Second, if needed we delete oldest archived logfiles */
  	if (logcnt > 0 && logcnt >= ent->numlogs && ent->numlogs > 1) {
  		oldlogs = realloc(oldlogs, logcnt *
  		    sizeof(struct oldlog_entry));
  		if (oldlogs == NULL)
  			err(1, "realloc()");
  
  		/*
  		 * We now sort the logs in the order of newest to
  		 * oldest.  That way we can simply skip over the
  		 * number of records we want to keep.
  		 */
  		qsort(oldlogs, logcnt, sizeof(struct oldlog_entry),
  		    oldlog_entry_compare);
  		for (i = ent->numlogs - 1; i < logcnt; i++) {
  			if (noaction)
  				printf("\trm -f %s/%s\n", dir,
  				    oldlogs[i].fname);
  			else if (unlinkat(dir_fd, oldlogs[i].fname, 0) != 0) {
  				snprintf(errbuf, sizeof(errbuf),
  				    "Could not delete old logfile '%s'",
  				    oldlogs[i].fname);
  				perror(errbuf);
  			}
  		}
  	} else if (verbose > 1)
  		printf("No old logs to delete for logfile %s\n", ent->log);
  
  	/* Third, cleanup */
  	closedir(dirp);
  	for (i = 0; i < logcnt; i++) {
  		assert(oldlogs[i].fname != NULL);
  		free(oldlogs[i].fname);
  	}
  	free(oldlogs);
  	free(logfname);
  	free(dir);
  }
  
  /*
   * Generate a log filename, when using classic filenames.
   */
  static void
  gen_classiclog_fname(char *fname, size_t fname_sz, const char *archive_dir,
      const char *namepart, int numlogs_c)
  {
  
  	if (archive_dir[0] != '\0')
  		(void) snprintf(fname, fname_sz, "%s/%s.%d", archive_dir,
  		    namepart, numlogs_c);
  	else
  		(void) snprintf(fname, fname_sz, "%s.%d", namepart, numlogs_c);
  }
  
  /*
   * Delete a rotated logfile, when using classic filenames.
   */
  static void
  delete_classiclog(const char *archive_dir, const char *namepart, int numlog_c)
  {
  	char file1[MAXPATHLEN], zfile1[MAXPATHLEN];
  	int c;
  
  	gen_classiclog_fname(file1, sizeof(file1), archive_dir, namepart,
  	    numlog_c);
  
  	for (c = 0; c < COMPRESS_TYPES; c++) {
  		(void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1,
  		    compress_type[c].suffix);
  		if (noaction)
  			printf("\trm -f %s\n", zfile1);
  		else
  			(void) unlink(zfile1);
  	}
  }
  
  /*
   * Only add to the queue if the file hasn't already been added. This is
   * done to prevent circular include loops.
   */
  static void
  add_to_queue(const char *fname, struct ilist *inclist)
  {
  	struct include_entry *inc;
  
  	STAILQ_FOREACH(inc, inclist, inc_nextp) {
  		if (strcmp(fname, inc->file) == 0) {
  			warnx("duplicate include detected: %s", fname);
  			return;
  		}
  	}
  
  	inc = malloc(sizeof(struct include_entry));
  	if (inc == NULL)
  		err(1, "malloc of inc");
  	inc->file = strdup(fname);
  
  	if (verbose > 2)
  		printf("\t+ Adding %s to the processing queue.\n", fname);
  
  	STAILQ_INSERT_TAIL(inclist, inc, inc_nextp);
  }
  
  /*
   * Search for logfile and return its compression suffix (if supported)
   * The suffix detection is first-match in the order of compress_types
   *
   * Note: if logfile without suffix exists (uncompressed, COMPRESS_NONE)
   * a zero-length string is returned
   */
  static const char *
  get_logfile_suffix(const char *logfile)
  {
  	struct stat st;
  	char zfile[MAXPATHLEN];
  	int c;
  
  	for (c = 0; c < COMPRESS_TYPES; c++) {
  		(void) strlcpy(zfile, logfile, MAXPATHLEN);
  		(void) strlcat(zfile, compress_type[c].suffix, MAXPATHLEN);
  		if (lstat(zfile, &st) == 0)
  			return (compress_type[c].suffix);
  	}
  	return (NULL);
  }
  
  static fk_entry
  do_rotate(const struct conf_entry *ent)
  {
  	char dirpart[MAXPATHLEN], namepart[MAXPATHLEN];
  	char file1[MAXPATHLEN], file2[MAXPATHLEN];
  	char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN];
  	const char *logfile_suffix;
  	char datetimestr[30];
  	int flags, numlogs_c;
  	fk_entry free_or_keep;
  	struct sigwork_entry *swork;
  	struct stat st;
  	struct tm tm;
  	time_t now;
  
  	flags = ent->flags;
  	free_or_keep = FREE_ENT;
  
  	if (archtodir) {
  		char *p;
  
  		/* build complete name of archive directory into dirpart */
  		if (*archdirname == '/') {	/* absolute */
  			strlcpy(dirpart, archdirname, sizeof(dirpart));
  		} else {	/* relative */
  			/* get directory part of logfile */
  			strlcpy(dirpart, ent->log, sizeof(dirpart));
  			if ((p = strrchr(dirpart, '/')) == NULL)
  				dirpart[0] = '\0';
  			else
  				*(p + 1) = '\0';
  			strlcat(dirpart, archdirname, sizeof(dirpart));
  		}
  
  		/* check if archive directory exists, if not, create it */
  		if (lstat(dirpart, &st))
  			createdir(ent, dirpart);
  
  		/* get filename part of logfile */
  		if ((p = strrchr(ent->log, '/')) == NULL)
  			strlcpy(namepart, ent->log, sizeof(namepart));
  		else
  			strlcpy(namepart, p + 1, sizeof(namepart));
  	} else {
  		/*
  		 * Tell utility functions we are not using an archive
  		 * dir.
  		 */
  		dirpart[0] = '\0';
  		strlcpy(namepart, ent->log, sizeof(namepart));
  	}
  
  	/* Delete old logs */
  	if (timefnamefmt != NULL)
  		delete_oldest_timelog(ent, dirpart);
  	else {
  		/*
  		 * Handle cleaning up after legacy newsyslog where we
  		 * kept ent->numlogs + 1 files.  This code can go away
  		 * at some point in the future.
  		 */
  		delete_classiclog(dirpart, namepart, ent->numlogs);
  
  		if (ent->numlogs > 0)
  			delete_classiclog(dirpart, namepart, ent->numlogs - 1);
  
  	}
  
  	if (timefnamefmt != NULL) {
  		/* If time functions fails we can't really do any sensible */
  		if (time(&now) == (time_t)-1 ||
  		    localtime_r(&now, &tm) == NULL)
  			bzero(&tm, sizeof(tm));
  
  		strftime(datetimestr, sizeof(datetimestr), timefnamefmt, &tm);
  		if (archtodir)
  			(void) snprintf(file1, sizeof(file1), "%s/%s.%s",
  			    dirpart, namepart, datetimestr);
  		else
  			(void) snprintf(file1, sizeof(file1), "%s.%s",
  			    ent->log, datetimestr);
  
  		/* Don't run the code to move down logs */
  		numlogs_c = -1;
  	} else {
  		gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart,
  		    ent->numlogs - 1);
  		numlogs_c = ent->numlogs - 2;		/* copy for countdown */
  	}
  
  	/* Move down log files */
  	for (; numlogs_c >= 0; numlogs_c--) {
  		(void) strlcpy(file2, file1, sizeof(file2));
  
  		gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart,
  		    numlogs_c);
  
  		logfile_suffix = get_logfile_suffix(file1);
  		if (logfile_suffix == NULL)
  			continue;
  		(void) strlcpy(zfile1, file1, MAXPATHLEN);
  		(void) strlcpy(zfile2, file2, MAXPATHLEN);
  		(void) strlcat(zfile1, logfile_suffix, MAXPATHLEN);
  		(void) strlcat(zfile2, logfile_suffix, MAXPATHLEN);
  
  		if (noaction)
  			printf("\tmv %s %s\n", zfile1, zfile2);
  		else {
  			/* XXX - Ought to be checking for failure! */
  			(void)rename(zfile1, zfile2);
  		}
  		change_attrs(zfile2, ent);
  	}
  
  	if (ent->numlogs > 0) {
  		if (noaction) {
  			/*
  			 * Note that savelog() may succeed with using link()
  			 * for the archtodir case, but there is no good way
  			 * of knowing if it will when doing "noaction", so
  			 * here we claim that it will have to do a copy...
  			 */
  			if (archtodir)
  				printf("\tcp %s %s\n", ent->log, file1);
  			else
  				printf("\tln %s %s\n", ent->log, file1);
  			printf("\ttouch %s\t\t"
  			    "# Update mtime for 'when'-interval processing\n",
  			    file1);
  		} else {
  			if (!(flags & CE_BINARY)) {
  				/* Report the trimming to the old log */
  				log_trim(ent->log, ent);
  			}
  			savelog(ent->log, file1);
  			/*
  			 * Interval-based rotations are done using the mtime of
  			 * the most recently archived log, so make sure it gets
  			 * updated during a rotation.
  			 */
  			utimes(file1, NULL);
  		}
  		change_attrs(file1, ent);
  	}
  
  	/* Create the new log file and move it into place */
  	if (noaction)
  		printf("Start new log...\n");
  	createlog(ent);
  
  	/*
  	 * Save all signalling and file-compression to be done after log
  	 * files from all entries have been rotated.  This way any one
  	 * process will not be sent the same signal multiple times when
  	 * multiple log files had to be rotated.
  	 */
  	swork = NULL;
  	if (ent->pid_cmd_file != NULL)
  		swork = save_sigwork(ent);
  	if (ent->numlogs > 0 && ent->compress > COMPRESS_NONE) {
  		/*
  		 * The zipwork_entry will include a pointer to this
  		 * conf_entry, so the conf_entry should not be freed.
  		 */
  		free_or_keep = KEEP_ENT;
  		save_zipwork(ent, swork, ent->fsize, file1);
  	}
  
  	return (free_or_keep);
  }
  
  static void
  do_sigwork(struct sigwork_entry *swork)
  {
  	struct sigwork_entry *nextsig;
  	int kres, secs;
  	char *tmp;
  
  	if (swork->sw_runcmd == 0 && (!(swork->sw_pidok) || swork->sw_pid == 0))
  		return;			/* no work to do... */
  
  	/*
  	 * If nosignal (-s) was specified, then do not signal any process.
  	 * Note that a nosignal request triggers a warning message if the
  	 * rotated logfile needs to be compressed, *unless* -R was also
  	 * specified.  We assume that an `-sR' request came from a process
  	 * which writes to the logfile, and as such, we assume that process
  	 * has already made sure the logfile is not presently in use.  This
  	 * just sets swork->sw_pidok to a special value, and do_zipwork
  	 * will print any necessary warning(s).
  	 */
  	if (nosignal) {
  		if (!rotatereq)
  			swork->sw_pidok = -1;
  		return;
  	}
  
  	/*
  	 * Compute the pause between consecutive signals.  Use a longer
  	 * sleep time if we will be sending two signals to the same
  	 * daemon or process-group.
  	 */
  	secs = 0;
  	nextsig = SLIST_NEXT(swork, sw_nextp);
  	if (nextsig != NULL) {
  		if (swork->sw_pid == nextsig->sw_pid)
  			secs = 10;
  		else
  			secs = 1;
  	}
  
  	if (noaction) {
  		if (swork->sw_runcmd)
  			printf("\tsh -c '%s %d'\n", swork->sw_fname,
  			    swork->sw_signum);
  		else {
  			printf("\tkill -%d %d \t\t# %s\n", swork->sw_signum,
  			    (int)swork->sw_pid, swork->sw_fname);
  			if (secs > 0)
  				printf("\tsleep %d\n", secs);
  		}
  		return;
  	}
  
  	if (swork->sw_runcmd) {
  		asprintf(&tmp, "%s %d", swork->sw_fname, swork->sw_signum);
  		if (tmp == NULL) {
  			warn("can't allocate memory to run %s",
  			    swork->sw_fname);
  			return;
  		}
  		if (verbose)
  			printf("Run command: %s\n", tmp);
  		kres = system(tmp);
  		if (kres) {
  			warnx("%s: returned non-zero exit code: %d",
  			    tmp, kres);
  		}
  		free(tmp);
  		return;
  	}
  
  	kres = kill(swork->sw_pid, swork->sw_signum);
  	if (kres != 0) {
  		/*
  		 * Assume that "no such process" (ESRCH) is something
  		 * to warn about, but is not an error.  Presumably the
  		 * process which writes to the rotated log file(s) is
  		 * gone, in which case we should have no problem with
  		 * compressing the rotated log file(s).
  		 */
  		if (errno != ESRCH)
  			swork->sw_pidok = 0;
  		warn("can't notify %s, pid %d = %s", swork->sw_pidtype,
  		    (int)swork->sw_pid, swork->sw_fname);
  	} else {
  		if (verbose)
  			printf("Notified %s pid %d = %s\n", swork->sw_pidtype,
  			    (int)swork->sw_pid, swork->sw_fname);
  		if (secs > 0) {
  			if (verbose)
  				printf("Pause %d second(s) between signals\n",
  				    secs);
  			sleep(secs);
  		}
  	}
  }
  
  static void
  do_zipwork(struct zipwork_entry *zwork)
  {
  	const char *pgm_name, *pgm_path;
  	int errsav, fcount, zstatus;
  	pid_t pidzip, wpid;
  	char zresult[MAXPATHLEN];
  	int c;
  
  	assert(zwork != NULL);
  	pgm_path = NULL;
  	strlcpy(zresult, zwork->zw_fname, sizeof(zresult));
  	if (zwork->zw_conf != NULL &&
  	    zwork->zw_conf->compress > COMPRESS_NONE)
  		for (c = 1; c < COMPRESS_TYPES; c++) {
  			if (zwork->zw_conf->compress == c) {
  				pgm_path = compress_type[c].path;
  				(void) strlcat(zresult,
  				    compress_type[c].suffix, sizeof(zresult));
  				break;
  			}
  		}
  	if (pgm_path == NULL) {
  		warnx("invalid entry for %s in do_zipwork", zwork->zw_fname);
  		return;
  	}
  	pgm_name = strrchr(pgm_path, '/');
  	if (pgm_name == NULL)
  		pgm_name = pgm_path;
  	else
  		pgm_name++;
  
  	if (zwork->zw_swork != NULL && zwork->zw_swork->sw_runcmd == 0 &&
  	    zwork->zw_swork->sw_pidok <= 0) {
  		warnx(
  		    "log %s not compressed because daemon(s) not notified",
  		    zwork->zw_fname);
  		change_attrs(zwork->zw_fname, zwork->zw_conf);
  		return;
  	}
  
  	if (noaction) {
  		printf("\t%s %s\n", pgm_name, zwork->zw_fname);
  		change_attrs(zresult, zwork->zw_conf);
  		return;
  	}
  
  	fcount = 1;
  	pidzip = fork();
  	while (pidzip < 0) {
  		/*
  		 * The fork failed.  If the failure was due to a temporary
  		 * problem, then wait a short time and try it again.
  		 */
  		errsav = errno;
  		warn("fork() for `%s %s'", pgm_name, zwork->zw_fname);
  		if (errsav != EAGAIN || fcount > 5)
  			errx(1, "Exiting...");
  		sleep(fcount * 12);
  		fcount++;
  		pidzip = fork();
  	}
  	if (!pidzip) {
  		/* The child process executes the compression command */
  		execl(pgm_path, pgm_path, "-f", zwork->zw_fname, (char *)0);
  		err(1, "execl(`%s -f %s')", pgm_path, zwork->zw_fname);
  	}
  
  	wpid = waitpid(pidzip, &zstatus, 0);
  	if (wpid == -1) {
  		/* XXX - should this be a fatal error? */
  		warn("%s: waitpid(%d)", pgm_path, pidzip);
  		return;
  	}
  	if (!WIFEXITED(zstatus)) {
  		warnx("`%s -f %s' did not terminate normally", pgm_name,
  		    zwork->zw_fname);
  		return;
  	}
  	if (WEXITSTATUS(zstatus)) {
  		warnx("`%s -f %s' terminated with a non-zero status (%d)",
  		    pgm_name, zwork->zw_fname, WEXITSTATUS(zstatus));
  		return;
  	}
  
  	/* Compression was successful, set file attributes on the result. */
  	change_attrs(zresult, zwork->zw_conf);
  }
  
  /*
   * Save information on any process we need to signal.  Any single
   * process may need to be sent different signal-values for different
   * log files, but usually a single signal-value will cause the process
   * to close and re-open all of it's log files.
   */
  static struct sigwork_entry *
  save_sigwork(const struct conf_entry *ent)
  {
  	struct sigwork_entry *sprev, *stmp;
  	int ndiff;
  	size_t tmpsiz;
  
  	sprev = NULL;
  	ndiff = 1;
  	SLIST_FOREACH(stmp, &swhead, sw_nextp) {
  		ndiff = strcmp(ent->pid_cmd_file, stmp->sw_fname);
  		if (ndiff > 0)
  			break;
  		if (ndiff == 0) {
  			if (ent->sig == stmp->sw_signum)
  				break;
  			if (ent->sig > stmp->sw_signum) {
  				ndiff = 1;
  				break;
  			}
  		}
  		sprev = stmp;
  	}
  	if (stmp != NULL && ndiff == 0)
  		return (stmp);
  
  	tmpsiz = sizeof(struct sigwork_entry) + strlen(ent->pid_cmd_file) + 1;
  	stmp = malloc(tmpsiz);
  	
  	stmp->sw_runcmd = 0;
  	/* If this is a command to run we just set the flag and run command */
  	if (ent->flags & CE_PID2CMD) {
  		stmp->sw_pid = -1;
  		stmp->sw_pidok = 0;
  		stmp->sw_runcmd = 1;
  	} else {
  		set_swpid(stmp, ent);
  	}
  	stmp->sw_signum = ent->sig;
  	strcpy(stmp->sw_fname, ent->pid_cmd_file);
  	if (sprev == NULL)
  		SLIST_INSERT_HEAD(&swhead, stmp, sw_nextp);
  	else
  		SLIST_INSERT_AFTER(sprev, stmp, sw_nextp);
  	return (stmp);
  }
  
  /*
   * Save information on any file we need to compress.  We may see the same
   * file multiple times, so check the full list to avoid duplicates.  The
   * list itself is sorted smallest-to-largest, because that's the order we
   * want to compress the files.  If the partition is very low on disk space,
   * then the smallest files are the most likely to compress, and compressing
   * them first will free up more space for the larger files.
   */
  static struct zipwork_entry *
  save_zipwork(const struct conf_entry *ent, const struct sigwork_entry *swork,
      int zsize, const char *zipfname)
  {
  	struct zipwork_entry *zprev, *ztmp;
  	int ndiff;
  	size_t tmpsiz;
  
  	/* Compute the size if the caller did not know it. */
  	if (zsize < 0)
  		zsize = sizefile(zipfname);
  
  	zprev = NULL;
  	ndiff = 1;
  	SLIST_FOREACH(ztmp, &zwhead, zw_nextp) {
  		ndiff = strcmp(zipfname, ztmp->zw_fname);
  		if (ndiff == 0)
  			break;
  		if (zsize > ztmp->zw_fsize)
  			zprev = ztmp;
  	}
  	if (ztmp != NULL && ndiff == 0)
  		return (ztmp);
  
  	tmpsiz = sizeof(struct zipwork_entry) + strlen(zipfname) + 1;
  	ztmp = malloc(tmpsiz);
  	ztmp->zw_conf = ent;
  	ztmp->zw_swork = swork;
  	ztmp->zw_fsize = zsize;
  	strcpy(ztmp->zw_fname, zipfname);
  	if (zprev == NULL)
  		SLIST_INSERT_HEAD(&zwhead, ztmp, zw_nextp);
  	else
  		SLIST_INSERT_AFTER(zprev, ztmp, zw_nextp);
  	return (ztmp);
  }
  
  /* Send a signal to the pid specified by pidfile */
  static void
  set_swpid(struct sigwork_entry *swork, const struct conf_entry *ent)
  {
  	FILE *f;
  	long minok, maxok, rval;
  	char *endp, *linep, line[BUFSIZ];
  
  	minok = MIN_PID;
  	maxok = MAX_PID;
  	swork->sw_pidok = 0;
  	swork->sw_pid = 0;
  	swork->sw_pidtype = "daemon";
  	if (ent->flags & CE_SIGNALGROUP) {
  		/*
  		 * If we are expected to signal a process-group when
  		 * rotating this logfile, then the value read in should
  		 * be the negative of a valid process ID.
  		 */
  		minok = -MAX_PID;
  		maxok = -MIN_PID;
  		swork->sw_pidtype = "process-group";
  	}
  
  	f = fopen(ent->pid_cmd_file, "r");
  	if (f == NULL) {
  		if (errno == ENOENT && enforcepid == 0) {
  			/*
  			 * Warn if the PID file doesn't exist, but do
  			 * not consider it an error.  Most likely it
  			 * means the process has been terminated,
  			 * so it should be safe to rotate any log
  			 * files that the process would have been using.
  			 */
  			swork->sw_pidok = 1;
  			warnx("pid file doesn't exist: %s", ent->pid_cmd_file);
  		} else
  			warn("can't open pid file: %s", ent->pid_cmd_file);
  		return;
  	}
  
  	if (fgets(line, BUFSIZ, f) == NULL) {
  		/*
  		 * Warn if the PID file is empty, but do not consider
  		 * it an error.  Most likely it means the process has
  		 * has terminated, so it should be safe to rotate any
  		 * log files that the process would have been using.
  		 */
  		if (feof(f) && enforcepid == 0) {
  			swork->sw_pidok = 1;
  			warnx("pid/cmd file is empty: %s", ent->pid_cmd_file);
  		} else
  			warn("can't read from pid file: %s", ent->pid_cmd_file);
  		(void)fclose(f);
  		return;
  	}
  	(void)fclose(f);
  
  	errno = 0;
  	linep = line;
  	while (*linep == ' ')
  		linep++;
  	rval = strtol(linep, &endp, 10);
  	if (*endp != '\0' && !isspacech(*endp)) {
  		warnx("pid file does not start with a valid number: %s",
  		    ent->pid_cmd_file);
  	} else if (rval < minok || rval > maxok) {
  		warnx("bad value '%ld' for process number in %s",
  		    rval, ent->pid_cmd_file);
  		if (verbose)
  			warnx("\t(expecting value between %ld and %ld)",
  			    minok, maxok);
  	} else {
  		swork->sw_pidok = 1;
  		swork->sw_pid = rval;
  	}
  
  	return;
  }
  
  /* Log the fact that the logs were turned over */
  static int
  log_trim(const char *logname, const struct conf_entry *log_ent)
  {
  	FILE *f;
  	const char *xtra;
  
  	if ((f = fopen(logname, "a")) == NULL)
  		return (-1);
  	xtra = "";
  	if (log_ent->def_cfg)
  		xtra = " using <default> rule";
  	if (log_ent->firstcreate)
  		fprintf(f, "%s %s newsyslog[%d]: logfile first created%s\n",
  		    daytime, hostname, (int) getpid(), xtra);
  	else if (log_ent->r_reason != NULL)
  		fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s%s\n",
  		    daytime, hostname, (int) getpid(), log_ent->r_reason, xtra);
  	else
  		fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s\n",
  		    daytime, hostname, (int) getpid(), xtra);
  	if (fclose(f) == EOF)
  		err(1, "log_trim: fclose");
  	return (0);
  }
  
  /* Return size in kilobytes of a file */
  static int
  sizefile(const char *file)
  {
  	struct stat sb;
  
  	if (stat(file, &sb) < 0)
  		return (-1);
  	return (kbytes(sb.st_size));
  }
  
  /*
   * Return the mtime of the most recent archive of the logfile, using timestamp
   * based filenames.
   */
  static time_t
  mtime_old_timelog(const char *file)
  {
  	struct stat sb;
  	struct tm tm;
  	int dir_fd;
  	time_t t;
  	struct dirent *dp;
  	DIR *dirp;
  	char *s, *logfname, *dir;
  
  	t = -1;
  
  	if ((dir = dirname(file)) == NULL) {
  		warn("dirname() of '%s'", file);
  		return (t);
  	}
  	if ((s = basename(file)) == NULL) {
  		warn("basename() of '%s'", file);
  		return (t);
  	} else if (s[0] == '/') {
  		warnx("Invalid log filename '%s'", s);
  		return (t);
  	} else if ((logfname = strdup(s)) == NULL)
  		err(1, "strdup()");
  
  	if ((dirp = opendir(dir)) == NULL) {
  		warn("Cannot open log directory '%s'", dir);
  		return (t);
  	}
  	dir_fd = dirfd(dirp);
  	/* Open the archive dir and find the most recent archive of logfname. */
  	while ((dp = readdir(dirp)) != NULL) {
  		if (validate_old_timelog(dir_fd, dp, logfname, &tm) == 0)
  			continue;
  
  		if (fstatat(dir_fd, dp->d_name, &sb, AT_SYMLINK_NOFOLLOW) == -1) {
  			warn("Cannot stat '%s'", file);
  			continue;
  		}
  		if (t < sb.st_mtime)
  			t = sb.st_mtime;
  	}
  	closedir(dirp);
  
  	return (t);
  }
  
  /* Return the age in hours of the most recent archive of the logfile. */
  static int
  age_old_log(const char *file)
  {
  	struct stat sb;
  	const char *logfile_suffix;
  	char tmp[MAXPATHLEN + sizeof(".0") + COMPRESS_SUFFIX_MAXLEN + 1];
  	time_t mtime;
  
  	if (archtodir) {
  		char *p;
  
  		/* build name of archive directory into tmp */
  		if (*archdirname == '/') {	/* absolute */
  			strlcpy(tmp, archdirname, sizeof(tmp));
  		} else {	/* relative */
  			/* get directory part of logfile */
  			strlcpy(tmp, file, sizeof(tmp));
  			if ((p = strrchr(tmp, '/')) == NULL)
  				tmp[0] = '\0';
  			else
  				*(p + 1) = '\0';
  			strlcat(tmp, archdirname, sizeof(tmp));
  		}
  
  		strlcat(tmp, "/", sizeof(tmp));
  
  		/* get filename part of logfile */
  		if ((p = strrchr(file, '/')) == NULL)
  			strlcat(tmp, file, sizeof(tmp));
  		else
  			strlcat(tmp, p + 1, sizeof(tmp));
  	} else {
  		(void) strlcpy(tmp, file, sizeof(tmp));
  	}
  
  	if (timefnamefmt != NULL) {
  		mtime = mtime_old_timelog(tmp);
  		if (mtime == -1)
  			return (-1);
  	} else {
  		strlcat(tmp, ".0", sizeof(tmp));
  		logfile_suffix = get_logfile_suffix(tmp);
  		if (logfile_suffix == NULL)
  			return (-1);
  		(void) strlcat(tmp, logfile_suffix, sizeof(tmp));
  		if (stat(tmp, &sb) < 0)
  			return (-1);
  		mtime = sb.st_mtime;
  	}
  
  	return ((int)(ptimeget_secs(timenow) - mtime + 1800) / 3600);
  }
  
  /* Skip Over Blanks */
  static char *
  sob(char *p)
  {
  	while (p && *p && isspace(*p))
  		p++;
  	return (p);
  }
  
  /* Skip Over Non-Blanks */
  static char *
  son(char *p)
  {
  	while (p && *p && !isspace(*p))
  		p++;
  	return (p);
  }
  
  /* Check if string is actually a number */
  static int
  isnumberstr(const char *string)
  {
  	while (*string) {
  		if (!isdigitch(*string++))
  			return (0);
  	}
  	return (1);
  }
  
  /* Check if string contains a glob */
  static int
  isglobstr(const char *string)
  {
  	char chr;
  
  	while ((chr = *string++)) {
  		if (chr == '*' || chr == '?' || chr == '[')
  			return (1);
  	}
  	return (0);
  }
  
  /*
   * Save the active log file under a new name.  A link to the new name
   * is the quick-and-easy way to do this.  If that fails (which it will
   * if the destination is on another partition), then make a copy of
   * the file to the new location.
   */
  static void
  savelog(char *from, char *to)
  {
  	FILE *src, *dst;
  	int c, res;
  
  	res = link(from, to);
  	if (res == 0)
  		return;
  
  	if ((src = fopen(from, "r")) == NULL)
  		err(1, "can't fopen %s for reading", from);
  	if ((dst = fopen(to, "w")) == NULL)
  		err(1, "can't fopen %s for writing", to);
  
  	while ((c = getc(src)) != EOF) {
  		if ((putc(c, dst)) == EOF)
  			err(1, "error writing to %s", to);
  	}
  
  	if (ferror(src))
  		err(1, "error reading from %s", from);
  	if ((fclose(src)) != 0)
  		err(1, "can't fclose %s", to);
  	if ((fclose(dst)) != 0)
  		err(1, "can't fclose %s", from);
  }
  
  /* create one or more directory components of a path */
  static void
  createdir(const struct conf_entry *ent, char *dirpart)
  {
  	int res;
  	char *s, *d;
  	char mkdirpath[MAXPATHLEN];
  	struct stat st;
  
  	s = dirpart;
  	d = mkdirpath;
  
  	for (;;) {
  		*d++ = *s++;
  		if (*s != '/' && *s != '\0')
  			continue;
  		*d = '\0';
  		res = lstat(mkdirpath, &st);
  		if (res != 0) {
  			if (noaction) {
  				printf("\tmkdir %s\n", mkdirpath);
  			} else {
  				res = mkdir(mkdirpath, 0755);
  				if (res != 0)
  					err(1, "Error on mkdir(\"%s\") for -a",
  					    mkdirpath);
  			}
  		}
  		if (*s == '\0')
  			break;
  	}
  	if (verbose) {
  		if (ent->firstcreate)
  			printf("Created directory '%s' for new %s\n",
  			    dirpart, ent->log);
  		else
  			printf("Created directory '%s' for -a\n", dirpart);
  	}
  }
  
  /*
   * Create a new log file, destroying any currently-existing version
   * of the log file in the process.  If the caller wants a backup copy
   * of the file to exist, they should call 'link(logfile,logbackup)'
   * before calling this routine.
   */
  void
  createlog(const struct conf_entry *ent)
  {
  	int fd, failed;
  	struct stat st;
  	char *realfile, *slash, tempfile[MAXPATHLEN];
  
  	fd = -1;
  	realfile = ent->log;
  
  	/*
  	 * If this log file is being created for the first time (-C option),
  	 * then it may also be true that the parent directory does not exist
  	 * yet.  Check, and create that directory if it is missing.
  	 */
  	if (ent->firstcreate) {
  		strlcpy(tempfile, realfile, sizeof(tempfile));
  		slash = strrchr(tempfile, '/');
  		if (slash != NULL) {
  			*slash = '\0';
  			failed = stat(tempfile, &st);
  			if (failed && errno != ENOENT)
  				err(1, "Error on stat(%s)", tempfile);
  			if (failed)
  				createdir(ent, tempfile);
  			else if (!S_ISDIR(st.st_mode))
  				errx(1, "%s exists but is not a directory",
  				    tempfile);
  		}
  	}
  
  	/*
  	 * First create an unused filename, so it can be chown'ed and
  	 * chmod'ed before it is moved into the real location.  mkstemp
  	 * will create the file mode=600 & owned by us.  Note that all
  	 * temp files will have a suffix of '.z<something>'.
  	 */
  	strlcpy(tempfile, realfile, sizeof(tempfile));
  	strlcat(tempfile, ".zXXXXXX", sizeof(tempfile));
  	if (noaction)
  		printf("\tmktemp %s\n", tempfile);
  	else {
  		fd = mkstemp(tempfile);
  		if (fd < 0)
  			err(1, "can't mkstemp logfile %s", tempfile);
  
  		/*
  		 * Add status message to what will become the new log file.
  		 */
  		if (!(ent->flags & CE_BINARY)) {
  			if (log_trim(tempfile, ent))
  				err(1, "can't add status message to log");
  		}
  	}
  
  	/* Change the owner/group, if we are supposed to */
  	if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
  		if (noaction)
  			printf("\tchown %u:%u %s\n", ent->uid, ent->gid,
  			    tempfile);
  		else {
  			failed = fchown(fd, ent->uid, ent->gid);
  			if (failed)
  				err(1, "can't fchown temp file %s", tempfile);
  		}
  	}
  
  	/* Turn on NODUMP if it was requested in the config-file. */
  	if (ent->flags & CE_NODUMP) {
  		if (noaction)
  			printf("\tchflags nodump %s\n", tempfile);
  		else {
  			failed = fchflags(fd, UF_NODUMP);
  			if (failed) {
  				warn("log_trim: fchflags(NODUMP)");
  			}
  		}
  	}
  
  	/*
  	 * Note that if the real logfile still exists, and if the call
  	 * to rename() fails, then "neither the old file nor the new
  	 * file shall be changed or created" (to quote the standard).
  	 * If the call succeeds, then the file will be replaced without
  	 * any window where some other process might find that the file
  	 * did not exist.
  	 * XXX - ? It may be that for some error conditions, we could
  	 *	retry by first removing the realfile and then renaming.
  	 */
  	if (noaction) {
  		printf("\tchmod %o %s\n", ent->permissions, tempfile);
  		printf("\tmv %s %s\n", tempfile, realfile);
  	} else {
  		failed = fchmod(fd, ent->permissions);
  		if (failed)
  			err(1, "can't fchmod temp file '%s'", tempfile);
  		failed = rename(tempfile, realfile);
  		if (failed)
  			err(1, "can't mv %s to %s", tempfile, realfile);
  	}
  
  	if (fd >= 0)
  		close(fd);
  }
  
  /*
   * Change the attributes of a given filename to what was specified in
   * the newsyslog.conf entry.  This routine is only called for files
   * that newsyslog expects that it has created, and thus it is a fatal
   * error if this routine finds that the file does not exist.
   */
  static void
  change_attrs(const char *fname, const struct conf_entry *ent)
  {
  	int failed;
  
  	if (noaction) {
  		printf("\tchmod %o %s\n", ent->permissions, fname);
  
  		if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1)
  			printf("\tchown %u:%u %s\n",
  			    ent->uid, ent->gid, fname);
  
  		if (ent->flags & CE_NODUMP)
  			printf("\tchflags nodump %s\n", fname);
  		return;
  	}
  
  	failed = chmod(fname, ent->permissions);
  	if (failed) {
  		if (errno != EPERM)
  			err(1, "chmod(%s) in change_attrs", fname);
  		warn("change_attrs couldn't chmod(%s)", fname);
  	}
  
  	if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
  		failed = chown(fname, ent->uid, ent->gid);
  		if (failed)
  			warn("can't chown %s", fname);
  	}
  
  	if (ent->flags & CE_NODUMP) {
  		failed = chflags(fname, UF_NODUMP);
  		if (failed)
  			warn("can't chflags %s NODUMP", fname);
  	}
  }
  
  /*
   * Parse a signal number or signal name. Returns the signal number parsed or -1
   * on failure.
   */
  static int
  parse_signal(const char *str)
  {
  	int sig, i;
  	const char *errstr;
  
  	sig = strtonum(str, 1, sys_nsig - 1, &errstr);
  
  	if (errstr == NULL)
  		return (sig);
  	if (strncasecmp(str, "SIG", 3) == 0)
  		str += 3;
  
  	for (i = 1; i < sys_nsig; i++) {
  		if (strcasecmp(str, sys_signame[i]) == 0)
  			return (i);
  	}
  
  	return (-1);
  }
  