2 * Copyright (c) 1996 Regents of the University of Michigan.
5 * Redistribution and use in source and binary forms are permitted
6 * provided that this notice is preserved and that due credit is given
7 * to the University of Michigan at Ann Arbor. The name of the University
8 * may not be used to endorse or promote products derived from this
9 * software without specific prior written permission. This software
10 * is provided ``as is'' without express or implied warranty.
15 * replog.c - routines which read and write replication log files.
23 #include <ac/string.h>
24 #include <ac/syslog.h>
26 #include <ac/unistd.h>
29 #include <sys/param.h>
38 extern FILE *lock_fopen LDAP_P(( char *, char *, FILE ** ));
39 extern char *ch_malloc LDAP_P(( unsigned long ));
42 * Forward declarations
44 int file_nonempty LDAP_P(( char * ));
48 * Forward declarations
50 static int duplicate_replog( char *, char * );
54 * Copy the replication log. Returns 0 on success, 1 if a temporary
55 * error occurs, and -1 if a fatal error occurs.
64 FILE *rfp; /* replog fp */
65 FILE *lfp; /* replog lockfile fp */
66 FILE *dfp; /* duplicate replog fp */
67 FILE *dlfp; /* duplicate replog lockfile fp */
68 static char buf[ MAXPATHLEN ];
69 static char rbuf[ 1024 ];
72 Debug( LDAP_DEBUG_ARGS,
73 "copy replog \"%s\" to \"%s\"\n",
77 * Make sure the destination directory is writable. If not, exit
81 if (( p = strrchr( buf, '/' )) == NULL ) {
86 if ( access( buf, W_OK ) < 0 ) {
87 Debug( LDAP_DEBUG_ANY,
88 "Error: copy_replog (%d): Directory %s is not writable\n",
93 if (( p = strrchr( buf, '/' )) == NULL ) {
98 if ( access( buf, W_OK ) < 0 ) {
99 Debug( LDAP_DEBUG_ANY,
100 "Error: copy_replog (%d): Directory %s is not writable\n",
106 rfp = lock_fopen( src, "r", &lfp );
108 Debug( LDAP_DEBUG_ANY,
109 "Error: copy_replog: Can't lock replog \"%s\" for read: %s\n",
110 src, sys_errlist[ errno ], 0 );
115 dfp = lock_fopen( dst, "a", &dlfp );
117 Debug( LDAP_DEBUG_ANY,
118 "Error: copy_replog: Can't lock replog \"%s\" for write: %s\n",
119 src, sys_errlist[ errno ], 0 );
125 * Make our own private copy of the replication log.
127 while (( p = fgets( rbuf, sizeof( buf ), rfp )) != NULL ) {
130 /* Only truncate the source file if we're not in one-shot mode */
131 if ( !sglob->one_shot_mode ) {
132 /* truncate replication log */
133 truncate( src, (off_t) 0 );
136 if ( lock_fclose( rfp, lfp ) == EOF ) {
137 Debug( LDAP_DEBUG_ANY,
138 "Error: copy_replog: Error closing \"%s\"\n",
141 if ( lock_fclose( dfp, dlfp ) == EOF ) {
142 Debug( LDAP_DEBUG_ANY,
143 "Error: copy_replog: Error closing \"%s\"\n",
153 * Return 1 if the given file exists and has a nonzero size,
154 * 0 if it is empty or nonexistent.
161 static struct stat stbuf;
163 if ( stat( filename, &stbuf ) < 0 ) {
166 return( stbuf.st_size > (off_t ) 0 );