diff options
Diffstat (limited to 'usr.sbin/newsyslog/newsyslog.c')
| -rw-r--r-- | usr.sbin/newsyslog/newsyslog.c | 2576 |
1 files changed, 2576 insertions, 0 deletions
diff --git a/usr.sbin/newsyslog/newsyslog.c b/usr.sbin/newsyslog/newsyslog.c new file mode 100644 index 0000000..d0ef3d3 --- /dev/null +++ b/usr.sbin/newsyslog/newsyslog.c @@ -0,0 +1,2576 @@ +/*- + * ------+---------+---------+-------- + --------+---------+---------+---------* + * 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("$FreeBSD$"); + +#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(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); + +/* + * 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 (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), 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), 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), 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), 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), 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), 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), 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); /* 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': + /* + * XXX - Ick! Ugly! Remove ASAP! + * We want `c' and `C' for "create". But we + * will temporarily treat `c' as `g', because + * FreeBSD releases <= 4.8 have a typo of + * checking ('G' || 'c') for CE_GLOB. + */ + if (*q == 'c') { + warnx("Assuming 'g' for 'c' in flags for line:\n%s", + errline); + warnx("The 'c' flag will eventually mean 'CREATE'"); + working->flags |= CE_GLOB; + break; + } + 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); /* 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 (isdigit(*q)) + goto got_sig; + else + errx(1, + "illegal pid file or signal number in config file:\n%s", + errline); + } + if (eol) + q = NULL; + else { + q = parse = sob(++parse); /* Optional field */ + *(parse = son(parse)) = '\0'; + } + + working->sig = SIGHUP; + if (q && *q) { + if (isdigit(*q)) { + got_sig: + working->sig = atoi(q); + } else { + err_sig: + errx(1, + "illegal signal number in config file:\n%s", + errline); + } + if (working->sig < 1 || working->sig >= NSIG) + goto err_sig; + } + + /* + * 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); +} + +/* + * 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, valid; + struct oldlog_entry *oldlogs; + size_t logfname_len; + struct dirent *dp; + const char *cdir; + struct tm tm; + DIR *dirp; + int c; + + 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()"); + logfname_len = strlen(logfname); + 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 (dp->d_type != DT_REG) + continue; + + /* Ignore everything but files with our logfile prefix */ + if (strncmp(dp->d_name, logfname, logfname_len) != 0) + continue; + /* Ignore the actual non-rotated logfile */ + if (dp->d_namlen == logfname_len) + continue; + /* + * Make sure we created have found a logfile, so the + * postfix is valid, IE format is: '.<time>(.[bg]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]); + continue; + } + 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); + continue; + } + + for (c = 0; c < COMPRESS_TYPES; c++) + if (strcmp(s, compress_type[c].suffix) == 0) + valid = 1; + if (valid != 1) { + if (verbose) + printf("Ignoring %s which has unexpected " + "extension '%s'\n", dp->d_name, s); + 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 + * deamon 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", swork->sw_pidtype, + (int)swork->sw_pid); + } 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(dbtob(sb.st_blocks))); +} + +/* Return the age of old log file (file.0) */ +static int +age_old_log(char *file) +{ + struct stat sb; + const char *logfile_suffix; + char tmp[MAXPATHLEN + sizeof(".0") + COMPRESS_SUFFIX_MAXLEN + 1]; + + 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)); + } + + 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); + return ((int)(ptimeget_secs(timenow) - sb.st_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); + } +} |
