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155 lines
3.4 KiB
C
155 lines
3.4 KiB
C
/*
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* Copyright (c) 1996 Regents of the University of Michigan.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that this notice is preserved and that due credit is given
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* to the University of Michigan at Ann Arbor. The name of the University
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* may not be used to endorse or promote products derived from this
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* software without specific prior written permission. This software
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* is provided ``as is'' without express or implied warranty.
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*/
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/*
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* replog.c - routines which read and write replication log files.
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/errno.h>
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#include <ac/string.h>
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#include <ac/syslog.h>
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#include <ac/time.h>
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#include <ac/unistd.h>
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#include <sys/stat.h>
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif
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#include <fcntl.h>
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#include "slurp.h"
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#include "globals.h"
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/*
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* Copy the replication log. Returns 0 on success, 1 if a temporary
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* error occurs, and -1 if a fatal error occurs.
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*/
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int
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copy_replog(
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char *src,
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char *dst
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)
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{
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int rc = 0;
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FILE *rfp; /* replog fp */
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FILE *lfp; /* replog lockfile fp */
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FILE *dfp; /* duplicate replog fp */
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FILE *dlfp; /* duplicate replog lockfile fp */
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static char buf[ MAXPATHLEN ];
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static char rbuf[ 1024 ];
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char *p;
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Debug( LDAP_DEBUG_ARGS,
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"copy replog \"%s\" to \"%s\"\n",
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src, dst, 0 );
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/*
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* Make sure the destination directory is writable. If not, exit
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* with a fatal error.
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*/
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strcpy( buf, src );
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if (( p = strrchr( buf, '/' )) == NULL ) {
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strcpy( buf, "." );
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} else {
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*p = '\0';
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}
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if ( access( buf, W_OK ) < 0 ) {
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Debug( LDAP_DEBUG_ANY,
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"Error: copy_replog (%ld): Directory %s is not writable\n",
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(long) getpid(), buf, 0 );
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return( -1 );
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}
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strcpy( buf, dst );
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if (( p = strrchr( buf, '/' )) == NULL ) {
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strcpy( buf, "." );
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} else {
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*p = '\0';
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}
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if ( access( buf, W_OK ) < 0 ) {
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Debug( LDAP_DEBUG_ANY,
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"Error: copy_replog (%ld): Directory %s is not writable\n",
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(long) getpid(), buf, 0 );
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return( -1 );
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}
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/* lock src */
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rfp = lock_fopen( src, "r", &lfp );
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if ( rfp == NULL ) {
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Debug( LDAP_DEBUG_ANY,
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"Error: copy_replog: Can't lock replog \"%s\" for read: %s\n",
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src, sys_errlist[ errno ], 0 );
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return( 1 );
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}
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/* lock dst */
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dfp = lock_fopen( dst, "a", &dlfp );
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if ( dfp == NULL ) {
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Debug( LDAP_DEBUG_ANY,
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"Error: copy_replog: Can't lock replog \"%s\" for write: %s\n",
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src, sys_errlist[ errno ], 0 );
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lock_fclose( rfp, lfp );
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return( 1 );
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}
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/*
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* Make our own private copy of the replication log.
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*/
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while (( p = fgets( rbuf, sizeof( buf ), rfp )) != NULL ) {
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fputs( rbuf, dfp );
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}
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/* Only truncate the source file if we're not in one-shot mode */
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if ( !sglob->one_shot_mode ) {
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/* truncate replication log */
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truncate( src, (off_t) 0 );
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}
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if ( lock_fclose( dfp, dlfp ) == EOF ) {
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Debug( LDAP_DEBUG_ANY,
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"Error: copy_replog: Error closing \"%s\"\n",
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src, 0, 0 );
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}
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if ( lock_fclose( rfp, lfp ) == EOF ) {
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Debug( LDAP_DEBUG_ANY,
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"Error: copy_replog: Error closing \"%s\"\n",
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src, 0, 0 );
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}
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return( rc );
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}
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/*
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* Return 1 if the given file exists and has a nonzero size,
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* 0 if it is empty or nonexistent.
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*/
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int
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file_nonempty(
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char *filename
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)
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{
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static struct stat stbuf;
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if ( stat( filename, &stbuf ) < 0 ) {
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return( 0 );
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} else {
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return( stbuf.st_size > (off_t ) 0 );
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}
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}
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