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Diffstat (limited to 'contrib/zkt/zkt-soaserial.c')
| -rw-r--r-- | contrib/zkt/zkt-soaserial.c | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/contrib/zkt/zkt-soaserial.c b/contrib/zkt/zkt-soaserial.c new file mode 100644 index 0000000..ff107d9 --- /dev/null +++ b/contrib/zkt/zkt-soaserial.c @@ -0,0 +1,222 @@ +/***************************************************************** +** +** @(#) zkt-soaserial.c (c) Oct 2007 Holger Zuleger hznet.de +** +** A small utility to print out the (unixtime) soa serial +** number in a human readable form +** +** Copyright (c) Oct 2007, Holger Zuleger HZnet. All rights reserved. +** +** This software is open source. +** +** Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions +** are met: +** +** Redistributions of source code must retain the above copyright notice, +** this list of conditions and the following disclaimer. +** +** 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. +** +** Neither the name of Holger Zuleger HZnet nor the names of its contributors may +** be used to endorse or promote products derived from this software without +** specific prior written permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 REGENTS 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. +** +*****************************************************************/ +# include <stdio.h> +# include <string.h> +# include <sys/types.h> +# include <time.h> +# include <utime.h> +# include <assert.h> +# include <stdlib.h> +# include <ctype.h> +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif +# include "config_zkt.h" + +static const char *progname; + +static char *timestr (time_t sec); +static int read_serial_fromfile (const char *fname, unsigned long *serial); +static void printserial (const char *fname, unsigned long serial); +static void usage (const char *msg); + +/***************************************************************** +** timestr (sec) +*****************************************************************/ +static char *timestr (time_t sec) +{ + struct tm *t; + static char timestr[31+1]; /* 27+1 should be enough */ + +#if defined(HAVE_STRFTIME) && HAVE_STRFTIME + t = localtime (&sec); + strftime (timestr, sizeof (timestr), "%b %d %Y %T %z", t); +#else + static char *mstr[] = { + "Jan", "Feb", "Mar", "Apr", "May", "Jun", + "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" + }; + int h, s; + + t = localtime (&sec); + s = abs (t->tm_gmtoff); + h = t->tm_gmtoff / 3600; + s = t->tm_gmtoff % 3600; + snprintf (timestr, sizeof (timestr), "%s %2d %4d %02d:%02d:%02d %c%02d%02d", + mstr[t->tm_mon], t->tm_mday, t->tm_year + 1900, + t->tm_hour, t->tm_min, t->tm_sec, + t->tm_gmtoff < 0 ? '-': '+', + h, s); +#endif + + return timestr; +} + + +/**************************************************************** +** +** int read_serial_fromfile (filename) +** +** This function depends on a special syntax formating the +** SOA record in the zone file!! +** +** To match the SOA record, the SOA RR must be formatted +** like this: +** @ IN SOA <master.fq.dn.> <hostmaster.fq.dn.> ( +** <SPACEes or TABs> 1234567890; serial number +** <SPACEes or TABs> 86400 ; other values +** ... +** +****************************************************************/ +static int read_serial_fromfile (const char *fname, unsigned long *serial) +{ + FILE *fp; + char buf[4095+1]; + char master[254+1]; + int c; + int soafound; + + if ( (fp = fopen (fname, "r")) == NULL ) + return -1; /* file not found */ + + /* read until the line matches the beginning of a soa record ... */ + soafound = 0; + while ( !soafound && fgets (buf, sizeof buf, fp) ) + { + if ( sscanf (buf, "%*s %*d IN SOA %255s %*s (\n", master) == 1 ) + soafound = 1; + else if ( sscanf (buf, "%*s IN SOA %255s %*s (\n", master) == 1 ) + soafound = 1; + } + + if ( !soafound ) + return -2; /* no zone file (soa not found) */ + + /* move forward until any non ws is reached */ + while ( (c = getc (fp)) != EOF && isspace (c) ) + ; + ungetc (c, fp); /* pushback the non ws */ + + *serial = 0L; /* read in the current serial number */ + if ( fscanf (fp, "%lu", serial) != 1 ) /* try to get serial no */ + return -3; /* no serial number found */ + + fclose (fp); + + return 0; /* ok! */ +} + +/***************************************************************** +** printserial() +*****************************************************************/ +static void printserial (const char *fname, unsigned long serial) +{ + if ( fname && *fname ) + printf ("%-30s\t", fname); + + printf ("%10lu", serial); + + /* try to guess the soa serial format */ + if ( serial < 1136070000L ) /* plain integer (this is 2006-1-1 00:00 in unixtime format) */ + ; + else if ( serial > 2006010100L ) /* date format */ + { + int y, m, d, v; + + v = serial % 100; + serial /= 100; + d = serial % 100; + serial /= 100; + m = serial % 100; + serial /= 100; + y = serial; + + printf ("\t%d-%02d-%02d Version %02d", y, m, d, v); + } + else /* unixtime */ + printf ("\t%s\n", timestr (serial) ); + + printf ("\n"); +} + +/***************************************************************** +** usage (msg) +*****************************************************************/ +static void usage (const char *msg) +{ + if ( msg && *msg ) + fprintf (stderr, "%s\n", msg); + fprintf (stderr, "usage: %s {-s serial | signed_zonefile [...]}\n", progname); + + exit (1); +} + +/***************************************************************** +** main() +*****************************************************************/ +int main (int argc, char *argv[]) +{ + unsigned long serial; + + progname = *argv; + + if ( --argc == 0 ) + usage (""); + + if ( argv[1][0] == '-' ) + { + if ( argv[1][1] != 's' ) + usage ("illegal option"); + + if ( argc != 2 ) + usage ("Option -s requires an argument"); + + serial = atol (argv[2]); + printserial ("", serial); + } + else + while ( argc-- > 0 ) + if ( (read_serial_fromfile (*++argv, &serial)) != 0 ) + fprintf (stderr, "couldn't read serial number from file %s\n", *argv); + else + printserial (*argv, serial); + + return 0; +} |