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freebsd-skq/usr.sbin/newsyslog/newsyslog.c
gad b21b4520ed When checking the 'user:group' field in newsyslog.conf, freebsd's source 
was mistakenly calling the standard isnumber() function to find out if
the given 'user' or 'group' were all numeric.  This meant that only the
first character of the fields were actually checked, so a username of
(say) '3com' would look like a number, and thus get mapped to uid=3 (bin)
instead of username=3com.

This bug was introduced back in freebsd's v1.1.  That initial import
almost matches netbsd's v1.9, except that an internal isnumber()
routine was removed in favor of the standard library version.  The thing
is, that internal routine was checking the entire string, and not just
the first digit.  In OpenBSD, isnumber() was eventually renamed to
isnumberstr() to make the distinction more obvious, and I'm going to
follow that lead.

I believe this also happens to remove the last references to isnumber()
in the entire freebsd base system.

Obtained from:	OpenBSD, by a long circuitous route
MFC after:	5 days
2003-08-19 03:53:03 +00:00

1924 lines
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/*
* 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
#ifndef COMPRESS_POSTFIX
#define COMPRESS_POSTFIX ".gz"
#endif
#ifndef BZCOMPRESS_POSTFIX
#define BZCOMPRESS_POSTFIX ".bz2"
#endif
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <ctype.h>
#include <err.h>
#include <errno.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 <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "pathnames.h"
/*
* Bit-values for the 'flags' parsed from a config-file entry.
*/
#define CE_COMPACT 0x0001 /* Compact the achived log files with gzip. */
#define CE_BZCOMPACT 0x0002 /* Compact the achived log files with bzip2. */
#define CE_COMPACTWAIT 0x0004 /* wait until compressing one file finishes */
/* before starting the next step. */
#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 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)
struct conf_entry {
char *log; /* Name of the log */
char *pid_file; /* PID 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 */
uid_t uid; /* Owner of log */
gid_t gid; /* Group of log */
int numlogs; /* Number of logs to keep */
int size; /* Size cutoff to trigger trimming the log */
int hours; /* Hours between log trimming */
time_t trim_at; /* Specific time to do trimming */
int permissions; /* File permissions on the log */
int flags; /* CE_COMPACT, CE_BZCOMPACT, CE_BINARY */
int sig; /* Signal to send */
int def_cfg; /* Using the <default> rule for this file */
struct conf_entry *next;/* Linked list pointer */
};
#define DEFAULT_MARKER "<default>"
int archtodir = 0; /* Archive old logfiles to other directory */
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 */
int needroot = 1; /* Root privs are necessary */
int noaction = 0; /* Don't do anything, just show it */
int nosignal; /* Do not send any signals */
int force = 0; /* Force the trim no matter what */
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). */
char *requestor; /* The name given on a -R request */
char *archdirname; /* Directory path to old logfiles archive */
const char *conf; /* Configuration file to use */
time_t timenow;
char hostname[MAXHOSTNAMELEN]; /* hostname */
char daytime[16]; /* timenow in human readable form */
static struct conf_entry *get_worklist(char **files);
static void parse_file(FILE *cf, const char *cfname, struct conf_entry **work_p,
struct conf_entry **glob_p, struct conf_entry **defconf_p);
static char *sob(char *p);
static char *son(char *p);
static int isnumberstr(const char *);
static char *missing_field(char *p, char *errline);
static void do_entry(struct conf_entry * ent);
static void expand_globs(struct conf_entry **work_p,
struct conf_entry **glob_p);
static void free_clist(struct conf_entry **firstent);
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 void usage(void);
static void dotrim(const struct conf_entry *ent, char *log,
int numdays, int flags);
static int log_trim(const char *log, const struct conf_entry *log_ent);
static void compress_log(char *log, int dowait);
static void bzcompress_log(char *log, int dowait);
static int sizefile(char *file);
static int age_old_log(char *file);
static int send_signal(const struct conf_entry *ent);
static time_t parse8601(char *s, char *errline);
static void movefile(char *from, char *to, int perm, uid_t owner_uid,
gid_t group_gid);
static void createdir(const struct conf_entry *ent, char *dirpart);
static void createlog(const struct conf_entry *ent);
static time_t parseDWM(char *s, char *errline);
/*
* All the following are defined to work on an 'int', in the
* range 0 to 255, plus EOF. Define wrappers which can take
* values of type 'char', either signed or unsigned.
*/
#define isdigitch(Anychar) isdigit(((int) Anychar) & 255)
#define isprintch(Anychar) isprint(((int) Anychar) & 255)
#define isspacech(Anychar) isspace(((int) Anychar) & 255)
#define tolowerch(Anychar) tolower(((int) Anychar) & 255)
int
main(int argc, char **argv)
{
struct conf_entry *p, *q;
parse_args(argc, argv);
argc -= optind;
argv += optind;
if (needroot && getuid() && geteuid())
errx(1, "must have root privs");
p = q = get_worklist(argv);
while (p) {
do_entry(p);
p = p->next;
free_entry(q);
q = p;
}
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);
tempwork->log = strdup(fname);
if (tempwork->log == NULL)
err(1, "strdup for %s", fname);
if (src_entry != NULL) {
tempwork->pid_file = NULL;
if (src_entry->pid_file)
tempwork->pid_file = strdup(src_entry->pid_file);
tempwork->r_reason = NULL;
tempwork->firstcreate = 0;
tempwork->rotate = 0;
tempwork->uid = src_entry->uid;
tempwork->gid = src_entry->gid;
tempwork->numlogs = src_entry->numlogs;
tempwork->size = src_entry->size;
tempwork->hours = src_entry->hours;
tempwork->trim_at = src_entry->trim_at;
tempwork->permissions = src_entry->permissions;
tempwork->flags = src_entry->flags;
tempwork->sig = src_entry->sig;
tempwork->def_cfg = src_entry->def_cfg;
} else {
/* Initialize as a "do-nothing" entry */
tempwork->pid_file = NULL;
tempwork->r_reason = NULL;
tempwork->firstcreate = 0;
tempwork->rotate = 0;
tempwork->uid = (uid_t)-1;
tempwork->gid = (gid_t)-1;
tempwork->numlogs = 1;
tempwork->size = -1;
tempwork->hours = -1;
tempwork->trim_at = (time_t)0;
tempwork->permissions = 0;
tempwork->flags = 0;
tempwork->sig = SIGHUP;
tempwork->def_cfg = 0;
}
tempwork->next = NULL;
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_file != NULL) {
free(ent->pid_file);
ent->pid_file = NULL;
}
if (ent->r_reason != NULL) {
free(ent->r_reason);
ent->r_reason = NULL;
}
free(ent);
}
static void
free_clist(struct conf_entry **firstent)
{
struct conf_entry *ent, *nextent;
if (firstent == NULL)
return; /* There is nothing to do. */
ent = *firstent;
firstent = NULL;
while (ent) {
nextent = ent->next;
free_entry(ent);
ent = nextent;
}
}
static void
do_entry(struct conf_entry * ent)
{
#define REASON_MAX 80
int size, modtime;
char temp_reason[REASON_MAX];
if (verbose) {
if (ent->flags & CE_COMPACT)
printf("%s <%dZ>: ", ent->log, ent->numlogs);
else if (ent->flags & CE_BZCOMPACT)
printf("%s <%dJ>: ", ent->log, ent->numlogs);
else
printf("%s <%d>: ", ent->log, ent->numlogs);
}
size = sizefile(ent->log);
modtime = age_old_log(ent->log);
ent->rotate = 0;
ent->firstcreate = 0;
if (size < 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)
strncpy(temp_reason, " (no -C option)", REASON_MAX);
else if (createlogs)
strncpy(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) {
if (timenow < ent->trim_at
|| difftime(timenow, ent->trim_at) >= 60 * 60) {
if (verbose)
printf("--> will trim at %s",
ctime(&ent->trim_at));
return;
} else if (verbose && ent->hours <= 0) {
printf("--> time is up\n");
}
}
if (verbose && (ent->size > 0))
printf("size (Kb): %d [%d] ", size, ent->size);
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 ((ent->size > 0) && (size >= ent->size)) {
ent->rotate = 1;
snprintf(temp_reason, REASON_MAX, " due to size>%dK",
ent->size);
} 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) {
if (temp_reason[0] != '\0')
ent->r_reason = strdup(temp_reason);
if (verbose)
printf("--> trimming log....\n");
if (noaction && !verbose) {
if (ent->flags & CE_COMPACT)
printf("%s <%dZ>: trimming\n",
ent->log, ent->numlogs);
else if (ent->flags & CE_BZCOMPACT)
printf("%s <%dJ>: trimming\n",
ent->log, ent->numlogs);
else
printf("%s <%d>: trimming\n",
ent->log, ent->numlogs);
}
dotrim(ent, ent->log, ent->numlogs, ent->flags);
} else {
if (verbose)
printf("--> skipping\n");
}
}
#undef REASON_MAX
}
/* Send a signal to the pid specified by pidfile */
static int
send_signal(const struct conf_entry *ent)
{
pid_t target_pid;
int did_notify;
FILE *f;
long minok, maxok, rval;
const char *target_name;
char *endp, *linep, line[BUFSIZ];
did_notify = 0;
f = fopen(ent->pid_file, "r");
if (f == NULL) {
warn("can't open pid file: %s", ent->pid_file);
return (did_notify);
/* NOTREACHED */
}
if (fgets(line, BUFSIZ, f) == NULL) {
/*
* XXX - If the pid file is empty, is that really a
* problem? Wouldn't that mean that the process
* has shut down? In that case there would be no
* problem with compressing the rotated log file.
*/
if (feof(f))
warnx("pid file is empty: %s", ent->pid_file);
else
warn("can't read from pid file: %s", ent->pid_file);
(void) fclose(f);
return (did_notify);
/* NOTREACHED */
}
(void) fclose(f);
target_name = "daemon";
minok = MIN_PID;
maxok = MAX_PID;
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.
*/
target_name = "process-group";
minok = -MAX_PID;
maxok = -MIN_PID;
}
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_file);
rval = 0;
} else if (rval < minok || rval > maxok) {
warnx("bad value '%ld' for process number in %s",
rval, ent->pid_file);
if (verbose)
warnx("\t(expecting value between %ld and %ld)",
minok, maxok);
rval = 0;
}
if (rval == 0) {
return (did_notify);
/* NOTREACHED */
}
target_pid = rval;
if (noaction) {
did_notify = 1;
printf("\tkill -%d %d\n", ent->sig, (int) target_pid);
} else if (kill(target_pid, ent->sig)) {
/*
* XXX - Iff the error was "no such process", should that
* really be an error for us? Perhaps the process
* is already gone, in which case there would be no
* problem with compressing the rotated log file.
*/
warn("can't notify %s, pid %d", target_name,
(int) target_pid);
} else {
did_notify = 1;
if (verbose)
printf("%s pid %d notified\n", target_name,
(int) target_pid);
}
return (did_notify);
}
static void
parse_args(int argc, char **argv)
{
int ch;
char *p;
timenow = time(NULL);
(void)strncpy(daytime, ctime(&timenow) + 4, 15);
daytime[15] = '\0';
/* 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:f:nrsvCFR:")) != -1)
switch (ch) {
case 'a':
archtodir++;
archdirname = optarg;
break;
case 'f':
conf = optarg;
break;
case 'n':
noaction++;
break;
case 'r':
needroot = 0;
break;
case 's':
nosignal = 1;
break;
case 'v':
verbose++;
break;
case 'C':
/* Useful for things like rc.diskless... */
createlogs++;
break;
case 'F':
force++;
break;
case 'R':
rotatereq++;
requestor = strdup(optarg);
break;
case 'm': /* Used by OpenBSD for "monitor mode" */
default:
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 = '.';
}
}
}
static void
usage(void)
{
fprintf(stderr,
"usage: newsyslog [-CFnrsv] [-a directory] [-f config-file]\n"
" [ [-R requestor] filename ... ]\n");
exit(1);
}
/*
* Parse a configuration file and return a linked list of all the logs
* which should be processed.
*/
static struct conf_entry *
get_worklist(char **files)
{
FILE *f;
const char *fname;
char **given;
struct conf_entry *defconf, *dupent, *ent, *firstnew;
struct conf_entry *globlist, *lastnew, *worklist;
int gmatch, fnres;
defconf = globlist = worklist = NULL;
fname = conf;
if (fname == NULL)
fname = _PATH_CONF;
if (strcmp(fname, "-") != 0)
f = fopen(fname, "r");
else {
f = stdin;
fname = "<stdin>";
}
if (!f)
err(1, "%s", conf);
parse_file(f, fname, &worklist, &globlist, &defconf);
(void) fclose(f);
/*
* All config-file information has been read in and turned into
* a worklist 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 worklist. Then return the worklist.
*/
if (*files == NULL) {
expand_globs(&worklist, &globlist);
free_clist(&globlist);
if (defconf != NULL)
free_entry(defconf);
return (worklist);
/* 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->size = 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 worklist.
*
* 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.
*/
firstnew = lastnew = NULL;
for (given = files; *given; ++given) {
/*
* First try to find exact-matches for this given file.
*/
gmatch = 0;
for (ent = worklist; ent; ent = ent->next) {
if (strcmp(ent->log, *given) == 0) {
gmatch++;
dupent = init_entry(*given, ent);
if (!firstnew)
firstnew = dupent;
else
lastnew->next = dupent;
lastnew = dupent;
}
}
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);
for (ent = globlist; ent; ent = ent->next) {
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);
if (!firstnew)
firstnew = dupent;
else
lastnew->next = dupent;
lastnew = dupent;
/* This new entry is not a glob! */
dupent->flags &= ~CE_GLOB;
/* 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);
if (!firstnew)
firstnew = dupent;
else
lastnew->next = dupent;
/* Mark that it was *not* found in a config file */
dupent->def_cfg = 1;
lastnew = dupent;
}
/*
* Free all the entries in the original work list, the list of
* glob entries, and the default entry.
*/
free_clist(&worklist);
free_clist(&globlist);
free_entry(defconf);
/* And finally, return a worklist which matches the given files. */
return (firstnew);
}
/*
* 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 conf_entry **work_p, struct conf_entry **glob_p)
{
int gmatch, gres, i;
char *mfname;
struct conf_entry *dupent, *ent, *firstmatch, *globent;
struct conf_entry *lastmatch;
glob_t pglob;
struct stat st_fm;
if ((glob_p == NULL) || (*glob_p == NULL))
return; /* There is nothing to do. */
/*
* 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.
*/
firstmatch = lastmatch = NULL;
for (globent = *glob_p; globent; globent = globent->next) {
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;
for (ent = *work_p; ent; ent = ent->next) {
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);
if (!firstmatch)
firstmatch = dupent;
else
lastmatch->next = dupent;
lastmatch = dupent;
/* This new entry is not a glob! */
dupent->flags &= ~CE_GLOB;
}
globfree(&pglob);
if (verbose > 2)
printf("\t+ Done with pattern %s\n", globent->log);
}
/* Add the list of matched files to the end of the worklist. */
if (!*work_p)
*work_p = firstmatch;
else {
ent = *work_p;
while (ent->next)
ent = ent->next;
ent->next = firstmatch;
}
}
/*
* Parse a configuration file and update a linked list of all the logs to
* process.
*/
static void
parse_file(FILE *cf, const char *cfname, struct conf_entry **work_p,
struct conf_entry **glob_p, struct conf_entry **defconf_p)
{
char line[BUFSIZ], *parse, *q;
char *cp, *errline, *group;
struct conf_entry *lastglob, *lastwork, *working;
struct passwd *pwd;
struct group *grp;
int eol, special;
/*
* XXX - for now, assume that only one config file will be read,
* ie, this routine is only called one time.
*/
lastglob = lastwork = NULL;
while (fgets(line, BUFSIZ, cf)) {
if ((line[0] == '\n') || (line[0] == '#') ||
(strlen(line) == 0))
continue;
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';
special = 0;
working = init_entry(q, NULL);
if (strcasecmp(DEFAULT_MARKER, q) == 0) {
special = 1;
if (defconf_p == NULL) {
warnx("Ignoring entry for %s in %s!", q,
cfname);
free_entry(working);
continue;
} else 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->size = atoi(q);
else if (strcmp(q,"*") == 0)
working->size = -1;
else {
warnx("Invalid value of '%s' for 'size' in line:\n%s",
q, errline);
working->size = -1;
}
working->flags = 0;
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' && *ep != '@' && *ep != '*' &&
*ep != '$')
errx(1, "malformed interval/at:\n%s", errline);
if (*ep == '@') {
if ((working->trim_at = parse8601(ep + 1, errline))
== (time_t) - 1)
errx(1, "malformed at:\n%s", errline);
working->flags |= CE_TRIMAT;
} else if (*ep == '$') {
if ((working->trim_at = parseDWM(ep + 1, errline))
== (time_t) - 1)
errx(1, "malformed at:\n%s", errline);
working->flags |= CE_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 'g':
working->flags |= CE_GLOB;
break;
case 'j':
working->flags |= CE_BZCOMPACT;
break;
case 'n':
working->flags |= CE_NOSIGNAL;
break;
case 'u':
working->flags |= CE_SIGNALGROUP;
break;
case 'w':
working->flags |= CE_COMPACTWAIT;
break;
case 'z':
working->flags |= CE_COMPACT;
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_file = NULL;
if (q && *q) {
if (*q == '/')
working->pid_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_file.
* This would be a pretty pointless combination.
*/
if (working->pid_file != NULL) {
warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s",
working->pid_file, errline);
free(working->pid_file);
working->pid_file = NULL;
}
} else if (working->pid_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_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) {
if (!*glob_p)
*glob_p = working;
else
lastglob->next = working;
lastglob = working;
} else {
if (!*work_p)
*work_p = working;
else
lastwork->next = working;
lastwork = working;
}
free(errline);
errline = NULL;
}
}
static char *
missing_field(char *p, char *errline)
{
if (!p || !*p)
errx(1, "missing field in config file:\n%s", errline);
return (p);
}
static void
dotrim(const struct conf_entry *ent, char *log, int numdays, int flags)
{
char dirpart[MAXPATHLEN], namepart[MAXPATHLEN];
char file1[MAXPATHLEN], file2[MAXPATHLEN];
char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN];
char jfile1[MAXPATHLEN];
char tfile[MAXPATHLEN];
int notified, need_notification, fd, _numdays;
struct stat st;
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, log, sizeof(dirpart));
if ((p = rindex(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 = rindex(log, '/')) == NULL)
strlcpy(namepart, log, sizeof(namepart));
else
strlcpy(namepart, p + 1, sizeof(namepart));
/* name of oldest log */
(void) snprintf(file1, sizeof(file1), "%s/%s.%d", dirpart,
namepart, numdays);
(void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1,
COMPRESS_POSTFIX);
snprintf(jfile1, sizeof(jfile1), "%s%s", file1,
BZCOMPRESS_POSTFIX);
} else {
/* name of oldest log */
(void) snprintf(file1, sizeof(file1), "%s.%d", log, numdays);
(void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1,
COMPRESS_POSTFIX);
snprintf(jfile1, sizeof(jfile1), "%s%s", file1,
BZCOMPRESS_POSTFIX);
}
if (noaction) {
printf("\trm -f %s\n", file1);
printf("\trm -f %s\n", zfile1);
printf("\trm -f %s\n", jfile1);
} else {
(void) unlink(file1);
(void) unlink(zfile1);
(void) unlink(jfile1);
}
/* Move down log files */
_numdays = numdays; /* preserve */
while (numdays--) {
(void) strlcpy(file2, file1, sizeof(file2));
if (archtodir)
(void) snprintf(file1, sizeof(file1), "%s/%s.%d",
dirpart, namepart, numdays);
else
(void) snprintf(file1, sizeof(file1), "%s.%d", log,
numdays);
(void) strlcpy(zfile1, file1, sizeof(zfile1));
(void) strlcpy(zfile2, file2, sizeof(zfile2));
if (lstat(file1, &st)) {
(void) strlcat(zfile1, COMPRESS_POSTFIX,
sizeof(zfile1));
(void) strlcat(zfile2, COMPRESS_POSTFIX,
sizeof(zfile2));
if (lstat(zfile1, &st)) {
strlcpy(zfile1, file1, sizeof(zfile1));
strlcpy(zfile2, file2, sizeof(zfile2));
strlcat(zfile1, BZCOMPRESS_POSTFIX,
sizeof(zfile1));
strlcat(zfile2, BZCOMPRESS_POSTFIX,
sizeof(zfile2));
if (lstat(zfile1, &st))
continue;
}
}
if (noaction) {
printf("\tmv %s %s\n", zfile1, zfile2);
printf("\tchmod %o %s\n", ent->permissions, zfile2);
if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1)
printf("\tchown %u:%u %s\n",
ent->uid, ent->gid, zfile2);
} else {
(void) rename(zfile1, zfile2);
if (chmod(zfile2, ent->permissions))
warn("can't chmod %s", file2);
if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1)
if (chown(zfile2, ent->uid, ent->gid))
warn("can't chown %s", zfile2);
}
}
if (!noaction && !(flags & CE_BINARY)) {
/* Report the trimming to the old log */
(void) log_trim(log, ent);
}
if (!_numdays) {
if (noaction)
printf("\trm %s\n", log);
else
(void) unlink(log);
} else {
if (noaction)
printf("\tmv %s to %s\n", log, file1);
else {
if (archtodir)
movefile(log, file1, ent->permissions, ent->uid,
ent->gid);
else
(void) rename(log, file1);
}
}
/* Now move the new log file into place */
/* XXX - We should replace the above 'rename' with 'link(log, file1)'
* then replace the following with 'createfile(ent)' */
strlcpy(tfile, log, sizeof(tfile));
strlcat(tfile, ".XXXXXX", sizeof(tfile));
if (noaction) {
printf("Start new log...\n");
printf("\tmktemp %s\n", tfile);
} else {
mkstemp(tfile);
fd = creat(tfile, ent->permissions);
if (fd < 0)
err(1, "can't start new log");
if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1)
if (fchown(fd, ent->uid, ent->gid))
err(1, "can't chown new log file");
(void) close(fd);
if (!(flags & CE_BINARY)) {
/* Add status message to new log file */
if (log_trim(tfile, ent))
err(1, "can't add status message to log");
}
}
if (noaction) {
printf("\tchmod %o %s\n", ent->permissions, tfile);
printf("\tmv %s %s\n", tfile, log);
} else {
(void) chmod(tfile, ent->permissions);
if (rename(tfile, log) < 0) {
err(1, "can't start new log");
(void) unlink(tfile);
}
}
/*
* Find out if there is a process to signal. If nosignal (-s) was
* specified, then do not signal any process. Note that nosignal
* will trigger a warning message if the rotated logfile needs to
* be compressed, *unless* -R was specified. This is because there
* presumably still are process(es) writing to the old logfile, but
* we assume that a -sR request comes from a process which writes
* to the logfile, and as such, that process has already made sure
* that the logfile is not presently in use.
*/
need_notification = notified = 0;
if (ent->pid_file != NULL) {
need_notification = 1;
if (!nosignal)
notified = send_signal(ent); /* the normal case! */
else if (rotatereq)
need_notification = 0;
}
if ((flags & CE_COMPACT) || (flags & CE_BZCOMPACT)) {
if (need_notification && !notified)
warnx(
"log %s.0 not compressed because daemon(s) not notified",
log);
else if (noaction)
if (flags & CE_COMPACT)
printf("\tgzip %s.0\n", log);
else
printf("\tbzip2 %s.0\n", log);
else {
if (notified) {
if (verbose)
printf("small pause to allow daemon(s) to close log\n");
sleep(10);
}
if (archtodir) {
(void) snprintf(file1, sizeof(file1), "%s/%s",
dirpart, namepart);
if (flags & CE_COMPACT)
compress_log(file1,
flags & CE_COMPACTWAIT);
else if (flags & CE_BZCOMPACT)
bzcompress_log(file1,
flags & CE_COMPACTWAIT);
} else {
if (flags & CE_COMPACT)
compress_log(log,
flags & CE_COMPACTWAIT);
else if (flags & CE_BZCOMPACT)
bzcompress_log(log,
flags & CE_COMPACTWAIT);
}
}
}
}
/* Log the fact that the logs were turned over */
static int
log_trim(const char *log, const struct conf_entry *log_ent)
{
FILE *f;
const char *xtra;
if ((f = fopen(log, "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);
}
/* Fork of gzip to compress the old log file */
static void
compress_log(char *log, int dowait)
{
pid_t pid;
char tmp[MAXPATHLEN];
while (dowait && (wait(NULL) > 0 || errno == EINTR))
;
(void) snprintf(tmp, sizeof(tmp), "%s.0", log);
pid = fork();
if (pid < 0)
err(1, "gzip fork");
else if (!pid) {
(void) execl(_PATH_GZIP, _PATH_GZIP, "-f", tmp, (char *)0);
err(1, _PATH_GZIP);
}
}
/* Fork of bzip2 to compress the old log file */
static void
bzcompress_log(char *log, int dowait)
{
pid_t pid;
char tmp[MAXPATHLEN];
while (dowait && (wait(NULL) > 0 || errno == EINTR))
;
snprintf(tmp, sizeof(tmp), "%s.0", log);
pid = fork();
if (pid < 0)
err(1, "bzip2 fork");
else if (!pid) {
execl(_PATH_BZIP2, _PATH_BZIP2, "-f", tmp, (char *)0);
err(1, _PATH_BZIP2);
}
}
/* Return size in kilobytes of a file */
static int
sizefile(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;
char *endp;
char tmp[MAXPATHLEN + sizeof(".0") + sizeof(COMPRESS_POSTFIX) +
sizeof(BZCOMPRESS_POSTFIX) + 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 = rindex(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 = rindex(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));
if (stat(tmp, &sb) < 0) {
/*
* A plain '.0' file does not exist. Try again, first
* with the added suffix of '.gz', then with an added
* suffix of '.bz2' instead of '.gz'.
*/
endp = strchr(tmp, '\0');
strlcat(tmp, COMPRESS_POSTFIX, sizeof(tmp));
if (stat(tmp, &sb) < 0) {
*endp = '\0'; /* Remove .gz */
strlcat(tmp, BZCOMPRESS_POSTFIX, sizeof(tmp));
if (stat(tmp, &sb) < 0)
return (-1);
}
}
return ((int)(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);
}
/*
* Parse a limited subset of ISO 8601. The specific format is as follows:
*
* [CC[YY[MM[DD]]]][THH[MM[SS]]] (where `T' is the literal letter)
*
* We don't accept a timezone specification; missing fields (including timezone)
* are defaulted to the current date but time zero.
*/
static time_t
parse8601(char *s, char *errline)
{
char *t;
time_t tsecs;
struct tm tm, *tmp;
u_long ul;
tmp = localtime(&timenow);
tm = *tmp;
tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
ul = strtoul(s, &t, 10);
if (*t != '\0' && *t != 'T')
return (-1);
/*
* Now t points either to the end of the string (if no time was
* provided) or to the letter `T' which separates date and time in
* ISO 8601. The pointer arithmetic is the same for either case.
*/
switch (t - s) {
case 8:
tm.tm_year = ((ul / 1000000) - 19) * 100;
ul = ul % 1000000;
case 6:
tm.tm_year -= tm.tm_year % 100;
tm.tm_year += ul / 10000;
ul = ul % 10000;
case 4:
tm.tm_mon = (ul / 100) - 1;
ul = ul % 100;
case 2:
tm.tm_mday = ul;
case 0:
break;
default:
return (-1);
}
/* sanity check */
if (tm.tm_year < 70 || tm.tm_mon < 0 || tm.tm_mon > 12
|| tm.tm_mday < 1 || tm.tm_mday > 31)
return (-1);
if (*t != '\0') {
s = ++t;
ul = strtoul(s, &t, 10);
if (*t != '\0' && !isspace(*t))
return (-1);
switch (t - s) {
case 6:
tm.tm_sec = ul % 100;
ul /= 100;
case 4:
tm.tm_min = ul % 100;
ul /= 100;
case 2:
tm.tm_hour = ul;
case 0:
break;
default:
return (-1);
}
/* sanity check */
if (tm.tm_sec < 0 || tm.tm_sec > 60 || tm.tm_min < 0
|| tm.tm_min > 59 || tm.tm_hour < 0 || tm.tm_hour > 23)
return (-1);
}
if ((tsecs = mktime(&tm)) == -1)
errx(1, "nonexistent time:\n%s", errline);
return (tsecs);
}
/* physically move file */
static void
movefile(char *from, char *to, int perm, uid_t owner_uid, gid_t group_gid)
{
FILE *src, *dst;
int c;
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);
if (owner_uid != (uid_t)-1 || group_gid != (gid_t)-1) {
if (fchown(fileno(dst), owner_uid, group_gid))
err(1, "can't fchown %s", to);
}
if (fchmod(fileno(dst), perm))
err(1, "can't fchmod %s", 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);
if ((unlink(from)) != 0)
err(1, "can't unlink %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 = lstat(tempfile, &st);
if (failed && errno != ENOENT)
err(1, "Error on lstat(%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);
}
}
/*
* 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);
}
/*-
* Parse a cyclic time specification, the format is as follows:
*
* [Dhh] or [Wd[Dhh]] or [Mdd[Dhh]]
*
* to rotate a logfile cyclic at
*
* - every day (D) within a specific hour (hh) (hh = 0...23)
* - once a week (W) at a specific day (d) OR (d = 0..6, 0 = Sunday)
* - once a month (M) at a specific day (d) (d = 1..31,l|L)
*
* We don't accept a timezone specification; missing fields
* are defaulted to the current date but time zero.
*/
static time_t
parseDWM(char *s, char *errline)
{
char *t;
time_t tsecs;
struct tm tm, *tmp;
long l;
int nd;
static int mtab[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
int WMseen = 0;
int Dseen = 0;
tmp = localtime(&timenow);
tm = *tmp;
/* set no. of days per month */
nd = mtab[tm.tm_mon];
if (tm.tm_mon == 1) {
if (((tm.tm_year + 1900) % 4 == 0) &&
((tm.tm_year + 1900) % 100 != 0) &&
((tm.tm_year + 1900) % 400 == 0)) {
nd++; /* leap year, 29 days in february */
}
}
tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
for (;;) {
switch (*s) {
case 'D':
if (Dseen)
return (-1);
Dseen++;
s++;
l = strtol(s, &t, 10);
if (l < 0 || l > 23)
return (-1);
tm.tm_hour = l;
break;
case 'W':
if (WMseen)
return (-1);
WMseen++;
s++;
l = strtol(s, &t, 10);
if (l < 0 || l > 6)
return (-1);
if (l != tm.tm_wday) {
int save;
if (l < tm.tm_wday) {
save = 6 - tm.tm_wday;
save += (l + 1);
} else {
save = l - tm.tm_wday;
}
tm.tm_mday += save;
if (tm.tm_mday > nd) {
tm.tm_mon++;
tm.tm_mday = tm.tm_mday - nd;
}
}
break;
case 'M':
if (WMseen)
return (-1);
WMseen++;
s++;
if (tolower(*s) == 'l') {
tm.tm_mday = nd;
s++;
t = s;
} else {
l = strtol(s, &t, 10);
if (l < 1 || l > 31)
return (-1);
if (l > nd)
return (-1);
tm.tm_mday = l;
}
break;
default:
return (-1);
break;
}
if (*t == '\0' || isspace(*t))
break;
else
s = t;
}
if ((tsecs = mktime(&tm)) == -1)
errx(1, "nonexistent time:\n%s", errline);
return (tsecs);
}
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