/* ====================================================================
* Copyright (c) 1995-1999 The Apache Group. 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.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* 4. The names "Apache Server" and "Apache Group" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the Apache Group
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
* EXPRESSED 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 APACHE GROUP OR
* ITS 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 software consists of voluntary contributions made by many
* individuals on behalf of the Apache Group and was originally based
* on public domain software written at the National Center for
* Supercomputing Applications, University of Illinois, Urbana-Champaign.
* For more information on the Apache Group and the Apache HTTP server
* project, please see <http://www.apache.org/>.
*
*/
/*
* cronoutils -- utilities for the cronolog program
*
* Copyright (c) 1996-1999 by Ford & Mason Ltd
*
* This software was submitted by Ford & Mason Ltd to the Apache
* Software Foundation in December 1999. Future revisions and
* derivatives of this source code must acknowledge Ford & Mason Ltd
* as the original contributor of this module. All other licensing
* and usage conditions are those of the Apache Software Foundation.
*
* Originally written by Andrew Ford <A.Ford@ford-mason.co.uk>
*
*/
#include "cronoutils.h"
extern char *tzname[2];
#ifdef _WIN32
#include "strptime.h"
#endif
/* debug_file is the file to output debug messages to. No debug
* messages are output if it is set to NULL.
*/
FILE *debug_file = NULL;
/* America and Europe disagree on whether weeks start on Sunday or
* Monday - weeks_start_on_mondays is set if a %U specifier is encountered.
*/
int weeks_start_on_mondays = 0;
/* periods[] is an array of the names of the periods.
*/
char *periods[] =
{
"second",
"minute",
"hour",
"day",
"week",
"month",
"year",
"aeon" /* i.e. once only */
};
/* period_seconds[] is an array of the number of seconds in a period.
*/
int period_seconds[] =
{
1,
60,
60 * 60,
60 * 60 * 24,
60 * 60 * 24 * 7,
60 * 60 * 24 * 31,
60 * 60 * 24 * 36
};
/* Try to create missing directories on the path of filename.
*
* Note that on a busy server there may theoretically be many cronolog
* processes trying simultaneously to create the same subdirectories
* so ignore any EEXIST errors on mkdir -- they probably just mean
* that another process got there first.
*
* Unless CHECK_ALL_PREFIX_DIRS is defined, we save the directory of
* the last file tested -- any common prefix should exist. This
* probably only saves a few stat system calls at the start of each
* log period, but it might as well be done.
*/
void
create_subdirs(char *filename)
{
#ifndef CHECK_ALL_PREFIX_DIRS
static char lastpath[MAX_PATH] = "";
#endif
struct stat stat_buf;
char dirname[MAX_PATH];
char *p;
DEBUG(("Creating missing components of \"%s\"\n", filename));
for (p = filename; (p = strchr(p, '/')); p++)
{
if (p == filename)
{
continue; /* Don't bother with the root directory */
}
memcpy(dirname, filename, p - filename);
dirname[p-filename] = '\0';
#ifndef CHECK_ALL_PREFIX_DIRS
if (strncmp(dirname, lastpath, strlen(dirname)) == 0)
{
DEBUG(("Initial prefix \"%s\" known to exist\n", dirname));
continue;
}
#endif
DEBUG(("Testing directory \"%s\"\n", dirname));
if (stat(dirname, &stat_buf) < 0)
{
if (errno != ENOENT)
{
perror(dirname);
exit(2);
}
else
{
DEBUG(("Directory \"%s\" does not exist -- creating\n", dirname));
if ((mkdir(dirname, DIR_MODE) < 0) && (errno != EEXIST))
#ifndef _WIN32
{
#else
if ((mkdir(dirname) < 0) && (errno != EEXIST))
#endif
perror(dirname);
exit(2);
}
}
}
}
#ifndef CHECK_ALL_PREFIX_DIRS
strcpy(lastpath, dirname);
#endif
}
/* Create a hard or symbolic link to a filename according to the type specified.
*
* This function could do with more error checking!
*/
void
create_link(char *pfilename,
const char *linkname, mode_t linktype,
const char *prevlinkname)
{
struct stat stat_buf;
if (stat(prevlinkname, &stat_buf) == 0)
{
unlink(prevlinkname);
}
if (lstat(linkname, &stat_buf) == 0)
{
if (prevlinkname) {
rename(linkname, prevlinkname);
}
else {
unlink(linkname);
}
}
#ifndef _WIN32
if (linktype == S_IFLNK)
{
symlink(pfilename, linkname);
}
else
{
link(pfilename, linkname);
}
#else
fprintf(stderr, "Creating link from %s to %s not supported", pfilename, linkname);
#endif
}
/* Examine the log file name specifier for strftime conversion
* specifiers and determine the period between log files.
* Smallest period allowed is per minute.
*/
PERIODICITY
determine_periodicity(char *spec)
{
PERIODICITY periodicity = ONCE_ONLY;
char ch;
DEBUG(("Determining periodicity of \"%s\"\n", spec));
while ((ch = *spec++) != 0)
{
if (ch == '%')
{
ch = *spec++;
if (!ch) break;
switch (ch)
{
case 'y': /* two digit year */
case 'Y': /* four digit year */
if (periodicity > YEARLY)
{
DEBUG(("%%%c -> yearly\n", ch));
periodicity = YEARLY;
}
break;
case 'b': /* abbreviated month name */
case 'h': /* abbreviated month name (non-standard) */
case 'B': /* full month name */
case 'm': /* month as two digit number (with
leading zero) */
if (periodicity > MONTHLY)
{
DEBUG(("%%%c -> monthly\n", ch));
periodicity = MONTHLY;
}
break;
case 'U': /* week number (weeks start on Sunday) */
case 'W': /* week number (weeks start on Monday) */
if (periodicity > WEEKLY)
{
DEBUG(("%%%c -> weeky\n", ch));
periodicity = WEEKLY;
weeks_start_on_mondays = (ch == 'W');
}
break;
case 'a': /* abbreviated weekday name */
case 'A': /* full weekday name */
case 'd': /* day of the month (with leading zero) */
case 'e': /* day of the month (with leading space -- non-standard) */
case 'j': /* day of the year (with leading zeroes) */
case 'w': /* day of the week (0-6) */
case 'D': /* full date spec (non-standard) */
case 'x': /* full date spec */
if (periodicity > DAILY)
{
DEBUG(("%%%c -> daily\n", ch));
periodicity = DAILY;
}
break;
case 'H': /* hour (24 hour clock) */
case 'I': /* hour (12 hour clock) */
case 'p': /* AM/PM indicator */
if (periodicity > HOURLY)
{
DEBUG(("%%%c -> hourly\n", ch));
periodicity = HOURLY;
}
break;
case 'M': /* minute */
if (periodicity > PER_MINUTE)
{
DEBUG(("%%%c -> per minute\n", ch));
periodicity = PER_MINUTE;
}
break;
case 'S': /* second */
case 's': /* seconds since the epoch (GNU non-standard) */
case 'c': /* full time and date spec */
case 'T': /* full time spec */
case 'r': /* full time spec (non-standard) */
case 'R': /* full time spec (non-standard) */
DEBUG(("%%%c -> per second", ch));
periodicity = PER_SECOND;
default: /* ignore anything else */
DEBUG(("ignoring %%%c\n", ch));
break;
}
}
}
return periodicity;
}
/*
*/
PERIODICITY
parse_timespec(char *optarg, int *p_period_multiple)
{
PERIODICITY periodicity = INVALID_PERIOD;
int period_multiple = 1;
char *p = optarg;
/* Skip leading whitespace */
while (isspace(*p)) { p++; }
/* Parse a digit string */
if (isdigit(*p)) {
period_multiple = *p++ - '0';
while (isdigit(*p)) {
period_multiple *= 10;
period_multiple += (*p++ - '0');
}
}
/* Skip whitespace */
while (isspace(*p)) { p++; }
if (strncasecmp(p, "sec", 3) == 0) {
if (period_multiple < 60) {
periodicity = PER_SECOND;
}
}
else if (strncasecmp(p, "min", 3) == 0) {
if (period_multiple < 60) {
periodicity = PER_MINUTE;
}
}
else if (strncasecmp(p, "hour", 4) == 0) {
if (period_multiple < 24) {
periodicity = HOURLY;
}
}
else if (strncasecmp(p, "day", 3) == 0) {
if (period_multiple <= 31) {
periodicity = DAILY;
}
}
else if (strncasecmp(p, "week", 4) == 0) {
if (period_multiple < 53) {
periodicity = WEEKLY;
}
}
else if (strncasecmp(p, "mon", 3) == 0) {
if (period_multiple <= 12) {
periodicity = MONTHLY;
}
}
*p_period_multiple = period_multiple;
return periodicity;
}
/* To determine the time of the start of the next period add just
* enough to move beyond the start of the next period and then
* determine the time of the start of that period.
*
* There is a potential problem if the start or end of daylight saving
* time occurs during the current period.
*/
time_t
start_of_next_period(time_t time_now, PERIODICITY periodicity, int period_multiple)
{
time_t start_time;
switch (periodicity)
{
case YEARLY:
start_time = (time_now + 366 * SECS_PER_DAY + DST_ALLOWANCE);
break;
case MONTHLY:
start_time = (time_now + 31 * SECS_PER_DAY + DST_ALLOWANCE);
break;
case WEEKLY:
start_time = (time_now + SECS_PER_WEEK + DST_ALLOWANCE);
break;
case DAILY:
start_time = (time_now + SECS_PER_DAY + DST_ALLOWANCE);
break;
case HOURLY:
start_time = time_now + period_multiple * SECS_PER_HOUR + LEAP_SECOND_ALLOWANCE;
break;
case PER_MINUTE:
start_time = time_now + period_multiple * SECS_PER_MIN + LEAP_SECOND_ALLOWANCE;
break;
case PER_SECOND:
start_time = time_now + 1;
break;
default:
start_time = FAR_DISTANT_FUTURE;
break;
}
return start_of_this_period(start_time, periodicity, period_multiple);
}
/* Determine the time of the start of the period containing a given time.
* Break down the time with localtime and subtract the number of
* seconds since the start of the period. If the length of period is
* equal or longer than a day then we have to check tht the
* calculation is not thrown out by the start or end of daylight
* saving time.
*/
time_t
start_of_this_period(time_t start_time, PERIODICITY periodicity, int period_multiple)
{
struct tm tm_initial;
struct tm tm_adjusted;
int expected_mday;
#ifndef _WIN32
localtime_r(&start_time, &tm_initial);
#else
struct tm * tempTime;
tempTime = localtime(&start_time);
if (NULL != tempTime)
{
memcpy(&tm_initial, tempTime, sizeof(struct tm));
free(tempTime);
tempTime = NULL;
}
#endif
switch (periodicity)
{
case YEARLY:
case MONTHLY:
case WEEKLY:
case DAILY:
switch (periodicity)
{
case YEARLY:
start_time -= ( (tm_initial.tm_yday * SECS_PER_DAY)
+ (tm_initial.tm_hour * SECS_PER_HOUR)
+ (tm_initial.tm_min * SECS_PER_MIN)
+ (tm_initial.tm_sec));
expected_mday = 1;
break;
case MONTHLY:
start_time -= ( ((tm_initial.tm_mday - 1) * SECS_PER_DAY)
+ ( tm_initial.tm_hour * SECS_PER_HOUR)
+ ( tm_initial.tm_min * SECS_PER_MIN)
+ ( tm_initial.tm_sec));
expected_mday = 1;
break;
case WEEKLY:
if (weeks_start_on_mondays)
{
tm_initial.tm_wday = (6 + tm_initial.tm_wday) % 7;
}
start_time -= ( (tm_initial.tm_wday * SECS_PER_DAY)
+ (tm_initial.tm_hour * SECS_PER_HOUR)
+ (tm_initial.tm_min * SECS_PER_MIN)
+ (tm_initial.tm_sec));
expected_mday = tm_initial.tm_mday;
break;
case DAILY:
start_time -= ( (tm_initial.tm_hour * SECS_PER_HOUR)
+ (tm_initial.tm_min * SECS_PER_MIN )
+ tm_initial.tm_sec);
expected_mday = tm_initial.tm_mday;
break;
default:
fprintf(stderr, "software fault in start_of_this_period()\n");
exit(1);
}
/* If the time of day is not equal to midnight then we need to
* adjust for daylight saving time. Adjust the time backwards
* by the value of the hour, minute and second fields. If the
* day of the month is not as expected one then we must have
* adjusted back to the previous day so add 24 hours worth of
* seconds.
*/
#ifndef _WIN32
localtime_r(&start_time, &tm_adjusted);
#else
tempTime = localtime(&start_time);
if (NULL != tempTime)
{
memcpy(&tm_adjusted, tempTime, sizeof(struct tm));
free(tempTime);
tempTime = NULL;
}
#endif
if ( (tm_adjusted.tm_hour != 0)
|| (tm_adjusted.tm_min != 0)
|| (tm_adjusted.tm_sec != 0))
{
char sign = '-';
time_t adjust = - ( (tm_adjusted.tm_hour * SECS_PER_HOUR)
+ (tm_adjusted.tm_min * SECS_PER_MIN)
+ (tm_adjusted.tm_sec));
if (tm_adjusted.tm_mday != expected_mday)
{
adjust += SECS_PER_DAY;
sign = '+';
}
start_time += adjust;
if (adjust < 0)
{
adjust = -adjust;
}
DEBUG(("Adjust for dst: %02d/%02d/%04d %02d:%02d:%02d -- %c%0d:%02d:%02d\n",
tm_initial.tm_mday, tm_initial.tm_mon+1, tm_initial.tm_year+1900,
tm_initial.tm_hour, tm_initial.tm_min, tm_initial.tm_sec, sign,
adjust / SECS_PER_HOUR, (adjust / 60) % 60, adjust % SECS_PER_HOUR));
}
break;
case HOURLY:
start_time -= (tm_initial.tm_sec + tm_initial.tm_min * SECS_PER_MIN);
if (period_multiple > 1) {
start_time -= SECS_PER_HOUR * (tm_initial.tm_hour -
period_multiple * (tm_initial.tm_hour / period_multiple));
}
break;
case PER_MINUTE:
start_time -= tm_initial.tm_sec;
if (period_multiple > 1) {
start_time -= SECS_PER_MIN * (tm_initial.tm_min -
period_multiple * (tm_initial.tm_min / period_multiple));
}
break;
case PER_SECOND: /* No adjustment needed */
default:
break;
}
return start_time;
}
/* Converts struct tm to time_t, assuming the data in tm is UTC rather
* than local timezone (as mktime assumes).
*
* Contributed by Roger Beeman <beeman@cisco.com>.
*/
time_t
mktime_from_utc(struct tm *t)
{
time_t tl, tb;
tl = mktime(t);
tb = mktime(gmtime(&tl));
return (tl <= tb ? (tl + (tl - tb)) : (tl - (tb - tl)));
}
/* Check whether the string is processed well. It is processed if the
* pointer is non-NULL, and it is either at the `GMT', or at the end
* of the string.
*/
static int
check_end(const char *p)
{
if (!p)
return 0;
while (isspace(*p))
++p;
if (!*p || (p[0] == 'G' && p[1] == 'M' && p[2] == 'T'))
return 1;
else
return 0;
}
/* NOTE: We don't use `%n' for white space, as OSF's strptime uses
it to eat all white space up to (and including) a newline, and
the function fails (!) if there is no newline.
Let's hope all strptime-s use ` ' to skipp *all* whitespace
instead of just one (it works that way on all the systems I've
tested it on). */
static char *european_date_formats[] =
{
"%d %b %Y %T", /* dd mmm yyyy HH:MM:SS */
"%d %b %Y %H:%M", /* dd mmm yyyy HH:MM */
"%d %b %Y", /* dd mmm yyyy */
"%d-%b-%Y %T", /* dd-mmm-yyyy HH:MM:SS */
"%d-%b-%Y %H:%M", /* dd-mmm-yyyy HH:MM */
"%d-%b-%y %T", /* dd-mmm-yy HH:MM:SS */
"%d-%b-%y %H:%M", /* dd-mmm-yy HH:MM */
"%d-%b-%Y",
"%b %d %T %Y",
"%b %d %Y",
NULL
};
static char *american_date_formats[] =
{
"%b %d %Y %T", /* dd mmm yyyy HH:MM:SS */
"%b %d %Y %H:%M", /* dd mmm yyyy HH:MM */
"%b %d %Y", /* dd mmm yyyy */
"%b-%d-%Y %T", /* dd-mmm-yyyy HH:MM:SS */
"%b-%d-%Y %H:%M", /* dd-mmm-yyyy HH:MM */
"%b-%d-%Y",
"%b/%d/%Y %T",
"%b/%d/%Y %H:%M",
"%b/%d/%Y",
NULL
};
time_t
parse_time(char *time_str, int use_american_date_formats)
{
struct tm tm;
char **date_formats;
memset(&tm, 0, sizeof (tm));
tm.tm_isdst = -1;
for (date_formats = (use_american_date_formats
? american_date_formats
: european_date_formats);
*date_formats;
date_formats++)
{
if (check_end((const char *)strptime(time_str, *date_formats, &tm)))
return mktime_from_utc(&tm);
}
return -1;
}
/* Simple debugging print function.
*/
void
print_debug_msg(char *msg, ...)
{
va_list ap;
va_start(ap, msg);
vfprintf(debug_file, msg, ap);
}
/* Build a timestamp and return a pointer to it.
* (has a number of static buffers that are rotated).
*/
char *
timestamp(time_t thetime)
{
static int index = 0;
static char buffer[4][80];
struct tm *tm;
char *retval;
retval = buffer[index++];
index %= 4;
tm = localtime(&thetime);
strftime(retval, 80, "%Y/%m/%d-%H:%M:%S %Z", tm);
return retval;
}
#ifndef _WIN32
/* Turn a string specifying either a username or UID into an actual
* uid_t for use in setuid(). A string is assumed to be a UID if
* it contains only decimal digits. */
uid_t
parse_uid(char *user, char *argv0)
{
char *probe = user;
struct passwd *ent;
while (*probe && isdigit(*probe)) {
probe++;
}
if (!(*probe)) {
return atoi(user);
}
if (!(ent = getpwnam(user))) {
fprintf(stderr, "%s: Bad username %s\n", argv0, user);
exit(1);
}
return (ent->pw_uid);
}
/* Turn a string specifying either a group name or GID into an actual
* gid_t for use in setgid(). A string is assumed to be a GID if
* it contains only decimal digits. */
gid_t
parse_gid(char *group, char *argv0)
{
char *probe = group;
struct group *ent;
while (*probe && isdigit(*probe)) {
probe++;
}
if (!(*probe)) {
return atoi(group);
}
if (!(ent = getgrnam(group))) {
fprintf(stderr, "%s: Bad group name %s\n", argv0, group);
exit(1);
}
return (ent->gr_gid);
}
#endif /* _WIN32 */
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