00b67f09dd
Also known as ISC bind. This import adds utilities such as host(1), dig(1), and nslookup(1), as well as many other tools and libraries. Change-Id: I035ca46e64f1965d57019e773f4ff0ef035e4aa3
225 lines
6.4 KiB
C
225 lines
6.4 KiB
C
/* $NetBSD: zkt-soaserial.c,v 1.1.1.1 2015/07/08 15:37:48 christos Exp $ */
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/*****************************************************************
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**
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** @(#) zkt-soaserial.c (c) Oct 2007 Holger Zuleger hznet.de
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**
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** A small utility to print out the (unixtime) soa serial
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** number in a human readable form
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**
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** Copyright (c) Oct 2007, Holger Zuleger HZnet. All rights reserved.
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**
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** This software is open source.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** Redistributions of source code must retain the above copyright notice,
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** this list of conditions and the following disclaimer.
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**
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** Redistributions in binary form must reproduce the above copyright notice,
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** this list of conditions and the following disclaimer in the documentation
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** and/or other materials provided with the distribution.
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**
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** Neither the name of Holger Zuleger HZnet nor the names of its contributors may
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** be used to endorse or promote products derived from this software without
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** specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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** TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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** PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
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** LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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** CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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** SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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** INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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** CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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** ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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** POSSIBILITY OF SUCH DAMAGE.
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**
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*****************************************************************/
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# include <stdio.h>
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# include <string.h>
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# include <sys/types.h>
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# include <time.h>
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# include <utime.h>
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# include <assert.h>
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# include <stdlib.h>
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# include <ctype.h>
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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# include "config_zkt.h"
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static const char *progname;
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static char *timestr (time_t sec);
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static int read_serial_fromfile (const char *fname, unsigned long *serial);
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static void printserial (const char *fname, unsigned long serial);
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static void usage (const char *msg);
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/*****************************************************************
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** timestr (sec)
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*****************************************************************/
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static char *timestr (time_t sec)
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{
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struct tm *t;
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static char timestr[31+1]; /* 27+1 should be enough */
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#if defined(HAVE_STRFTIME) && HAVE_STRFTIME
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t = localtime (&sec);
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strftime (timestr, sizeof (timestr), "%b %d %Y %T %z", t);
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#else
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static char *mstr[] = {
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"Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
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};
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int h, s;
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t = localtime (&sec);
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s = abs (t->tm_gmtoff);
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h = t->tm_gmtoff / 3600;
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s = t->tm_gmtoff % 3600;
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snprintf (timestr, sizeof (timestr), "%s %2d %4d %02d:%02d:%02d %c%02d%02d",
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mstr[t->tm_mon], t->tm_mday, t->tm_year + 1900,
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t->tm_hour, t->tm_min, t->tm_sec,
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t->tm_gmtoff < 0 ? '-': '+',
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h, s);
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#endif
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return timestr;
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}
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/****************************************************************
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**
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** int read_serial_fromfile (filename)
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**
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** This function depends on a special syntax formating the
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** SOA record in the zone file!!
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**
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** To match the SOA record, the SOA RR must be formatted
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** like this:
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** @ IN SOA <master.fq.dn.> <hostmaster.fq.dn.> (
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** <SPACEes or TABs> 1234567890; serial number
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** <SPACEes or TABs> 86400 ; other values
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** ...
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**
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****************************************************************/
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static int read_serial_fromfile (const char *fname, unsigned long *serial)
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{
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FILE *fp;
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char buf[4095+1];
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char master[254+1];
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int c;
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int soafound;
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if ( (fp = fopen (fname, "r")) == NULL )
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return -1; /* file not found */
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/* read until the line matches the beginning of a soa record ... */
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soafound = 0;
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while ( !soafound && fgets (buf, sizeof buf, fp) )
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{
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if ( sscanf (buf, "%*s %*d IN SOA %255s %*s (\n", master) == 1 )
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soafound = 1;
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else if ( sscanf (buf, "%*s IN SOA %255s %*s (\n", master) == 1 )
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soafound = 1;
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}
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if ( !soafound )
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return -2; /* no zone file (soa not found) */
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/* move forward until any non ws is reached */
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while ( (c = getc (fp)) != EOF && isspace (c) )
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;
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ungetc (c, fp); /* pushback the non ws */
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*serial = 0L; /* read in the current serial number */
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if ( fscanf (fp, "%lu", serial) != 1 ) /* try to get serial no */
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return -3; /* no serial number found */
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fclose (fp);
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return 0; /* ok! */
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}
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/*****************************************************************
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** printserial()
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*****************************************************************/
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static void printserial (const char *fname, unsigned long serial)
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{
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if ( fname && *fname )
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printf ("%-30s\t", fname);
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printf ("%10lu", serial);
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/* try to guess the soa serial format */
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if ( serial < 1136070000L ) /* plain integer (this is 2006-1-1 00:00 in unixtime format) */
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;
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else if ( serial > 2006010100L ) /* date format */
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{
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int y, m, d, v;
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v = serial % 100;
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serial /= 100;
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d = serial % 100;
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serial /= 100;
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m = serial % 100;
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serial /= 100;
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y = serial;
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printf ("\t%d-%02d-%02d Version %02d", y, m, d, v);
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}
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else /* unixtime */
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printf ("\t%s\n", timestr (serial) );
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printf ("\n");
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}
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/*****************************************************************
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** usage (msg)
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*****************************************************************/
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static void usage (const char *msg)
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{
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if ( msg && *msg )
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fprintf (stderr, "%s\n", msg);
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fprintf (stderr, "usage: %s {-s serial | signed_zonefile [...]}\n", progname);
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exit (1);
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}
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/*****************************************************************
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** main()
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*****************************************************************/
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int main (int argc, char *argv[])
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{
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unsigned long serial;
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progname = *argv;
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if ( --argc == 0 )
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usage ("");
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if ( argv[1][0] == '-' )
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{
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if ( argv[1][1] != 's' )
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usage ("illegal option");
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if ( argc != 2 )
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usage ("Option -s requires an argument");
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serial = atol (argv[2]);
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printserial ("", serial);
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}
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else
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while ( argc-- > 0 )
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if ( (read_serial_fromfile (*++argv, &serial)) != 0 )
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fprintf (stderr, "couldn't read serial number from file %s\n", *argv);
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else
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printserial (*argv, serial);
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return 0;
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}
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