Hi Nick, Thank for your replies. But in that case I have to search the dhcpd enteries and then parse the /var/log/ daemon. But I Just want to create another file with the format i like. Plz anybody help!!!!!!! Thanks in advance Rahul
On 7/14/06, Nick Guenther <[EMAIL PROTECTED]> wrote: > > On 7/13/06, Rahul Sharma <[EMAIL PROTECTED]> wrote: > > /* $OpenBSD: db.c,v 1.10 2004/09/16 18:35:42 deraadt Exp $ */ > > > > /* > > * Persistent database management routines for DHCPD. > > */ > > > > /* > > * Copyright (c) 1995, 1996 The Internet Software Consortium. > > * 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. Neither the name of The Internet Software Consortium 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 INTERNET SOFTWARE CONSORTIUM 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 INTERNET SOFTWARE CONSORTIUM 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 software has been written for the Internet Software Consortium > > * by Ted Lemon <[EMAIL PROTECTED]> in cooperation with Vixie > > * Enterprises. To learn more about the Internet Software Consortium, > > * see ``http://www.vix.com/isc''. To learn more about Vixie > > * Enterprises, see ``http://www.vix.com''. > > */ > > > > #include "dhcpd.h" > > > > FILE *db_file; > > FILE *abc; > > static int counting = 0; > > static int count = 0; > > time_t write_time; > > > > /* > > * Write the specified lease to the current lease database file. > > */ > > int > > write_lease(struct lease *lease) > > { > > struct tm *t; > > char tbuf[64]; > > int errors = 0; > > int i; > > > > if (counting) > > ++count; > > errno = 0; > > fprintf(db_file, "lease %s {\n", piaddr(lease->ip_addr)); > > fprintf(abc,"%s\t",piaddr(lease->ip_addr)); > > if (errno) > > ++errors; > > > > t = gmtime(&lease->starts); > > snprintf(tbuf, sizeof(tbuf), "%d %d/%02d/%02d %02d:%02d:%02d;", > > t->tm_wday, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, > > t->tm_hour, t->tm_min, t->tm_sec); > > > > errno = 0; > > fprintf(db_file, "\tstarts %s\n", tbuf); > > fprintf(abc, "%s\t", tbuf); > > if (errno) > > ++errors; > > > > t = gmtime(&lease->ends); > > snprintf(tbuf, sizeof(tbuf), "%d %d/%02d/%02d %02d:%02d:%02d;", > > t->tm_wday, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, > > t->tm_hour, t->tm_min, t->tm_sec); > > > > errno = 0; > > fprintf(db_file, "\tends %s", tbuf); > > fprintf(abc, "%s\t", tbuf); > > if (errno) > > ++errors; > > > > if (lease->hardware_addr.hlen) { > > errno = 0; > > fprintf(db_file, "\n\thardware %s %s;", > > hardware_types[lease->hardware_addr.htype], > > print_hw_addr(lease->hardware_addr.htype, > > lease->hardware_addr.hlen, > > lease->hardware_addr.haddr)); > > > > fprintf(abc,"%s\n", > > print_hw_addr(lease->hardware_addr.htype, > > lease->hardware_addr.hlen, > > lease->hardware_addr.haddr)); > > > > > > if (errno) > > ++errors; > > } > > > > if (lease->uid_len) { > > int j; > > > > errno = 0; > > fprintf(db_file, "\n\tuid %2.2x", lease->uid[0]); > > if (errno) > > ++errors; > > > > for (j = 1; j < lease->uid_len; j++) { > > errno = 0; > > fprintf(db_file, ":%2.2x", lease->uid[j]); > > if (errno) > > ++errors; > > } > > putc(';', db_file); > > } > > > > if (lease->flags & BOOTP_LEASE) { > > errno = 0; > > fprintf(db_file, "\n\tdynamic-bootp;"); > > if (errno) > > ++errors; > > } > > > > if (lease->flags & ABANDONED_LEASE) { > > errno = 0; > > fprintf(db_file, "\n\tabandoned;"); > > if (errno) > > ++errors; > > } > > > > if (lease->client_hostname) { > > for (i = 0; lease->client_hostname[i]; i++) > > if (lease->client_hostname[i] < 33 || > > lease->client_hostname[i] > 126) > > goto bad_client_hostname; > > errno = 0; > > fprintf(db_file, "\n\tclient-hostname \"%s\";", > > lease->client_hostname); > > if (errno) > > ++errors; > > } > > > > bad_client_hostname: > > if (lease->hostname) { > > for (i = 0; lease->hostname[i]; i++) > > if (lease->hostname[i] < 33 || > > lease->hostname[i] > 126) > > goto bad_hostname; > > errno = 0; > > fprintf(db_file, "\n\thostname \"%s\";", > > lease->hostname); > > if (errno) > > ++errors; > > } > > > > bad_hostname: > > errno = 0; > > fputs("\n}\n", db_file); > > if (errno) > > ++errors; > > > > if (errors) > > note("write_lease: unable to write lease %s", > > piaddr(lease->ip_addr)); > > > > return (!errors); > > } > > > > /* > > * Commit any leases that have been written out... > > */ > > int > > commit_leases(void) > > { > > /* > > * Commit any outstanding writes to the lease database file. We need > to > > * do this even if we're rewriting the file below, just in case the > > * rewrite fails. > > */ > > if (fflush(db_file) == EOF) { > > note("commit_leases: unable to commit: %m"); > > return (0); > > } > > > > if (fsync(fileno(db_file)) == -1) { > > note("commit_leases: unable to commit: %m"); > > return (0); > > } > > > > /* > > * If we've written more than a thousand leases or if we haven't > > * rewritten the lease database in over an hour, rewrite it now. > > */ > > if (count > 1000 || (count && cur_time - write_time > 3600)) { > > count = 0; > > write_time = cur_time; > > new_lease_file(); > > } > > > > return (1); > > } > > > > void > > db_startup(void) > > { > > int db_fd,pqr; > > > > /* open lease file. once we dropped privs it has to stay open */ > > db_fd = open(path_dhcpd_db, O_WRONLY|O_CREAT, 0664); > > if (db_fd == -1) > > error("Can't create new lease file: %m"); > > if ((db_file = fdopen(db_fd, "w")) == NULL) > > error("Can't fdopen new lease file!"); > > > > pqr = open("/var/db/log_dhcpd", O_WRONLY|O_CREAT, 0664); > > if (pqr == -1) > > error("Can't create new lease file: %m"); > > if ((abc = fdopen(pqr, "w")) == NULL) > > error("Can't fdopen new lease file!"); > > > > > > /* Read in the existing lease file... */ > > read_leases(); > > time(&write_time); > > > > new_lease_file(); > > } > > > > void > > new_lease_file(void) > > { > > fflush(db_file); > > rewind(db_file); > > > > /* > > * Write an introduction so people don't complain about time being > off. > > */ > > fprintf(db_file, "# All times in this file are in UTC (GMT), " > > "not your local timezone.\n"); > > fprintf(db_file, "# The format of this file is documented in " > > "the dhcpd.leases(5) manual page.\n\n"); > > > > /* Write out all the leases that we know of... */ > > counting = 0; > > write_leases(); > > > > fflush(db_file); > > ftruncate(fileno(db_file), ftello(db_file)); > > fsync(fileno(db_file)); > > > > counting = 1; > > } > > > > > > > > On 7/13/06, Rahul Sharma <[EMAIL PROTECTED]> wrote: > > > > > > Hi all, > > > I am using dhcpd on openBSD. > > > I wanted to make a log file of my own from which enteries will never > > > vanish. > > > Though I can use dhcpd.leases and parse it to get the values but i > wanted > > > to it from the sourse itself. > > > > > > What i have done so far -> > > > > > > I have made changes in db.c > > > 1. in function db_startup() > > > 2.write_lease(struct lease *lease) > > > > > > I am attaching db.c file with changes with it. > > > wherever u find "FILE *abc or int pqr".i have added those lines > > > it is compiling allright but is not writing into the file. > > > > > > Plz Help some one.......................... > > > Rahul > > I notice that when you open the file we see: > > void > db_startup(void) > { > int db_fd,pqr; <-- FAIL > > /* open lease file. once we dropped privs it has to stay open */ > db_fd = open(path_dhcpd_db, O_WRONLY|O_CREAT, 0664); > > That is, you are opening the file locally, so the other routines can't > get at it. > > This is a nice exercise, but parsing from leases.conf is probably a > much better idea because it won't require constant patching as future > versions come out. > > -Nick
