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 <sys/types.h>
25 #include <sys/param.h>
38 extern FILE *lock_fopen( char *, char *, FILE ** );
39 extern char *ch_malloc( unsigned long );
40 #else /* NEEDPROTOS */
41 extern FILE *lock_fopen();
42 extern char *ch_malloc();
43 #endif /* NEEDPROTOS */
46 * Forward declarations
49 int file_nonempty( char * );
50 #else /* NEEDPROTOS */
52 #endif /* NEEDPROTOS */
55 #ifndef SYSERRLIST_IN_STDIO
56 extern char *sys_errlist[];
60 * Forward declarations
62 static int duplicate_replog( char *, char * );
68 * Copy the replication log. Returns 0 on success, 1 if a temporary
69 * error occurs, and -1 if a fatal error occurs.
78 FILE *rfp; /* replog fp */
79 FILE *lfp; /* replog lockfile fp */
80 FILE *dfp; /* duplicate replog fp */
81 FILE *dlfp; /* duplicate replog lockfile fp */
82 static char buf[ MAXPATHLEN ];
83 static char rbuf[ 1024 ];
86 Debug( LDAP_DEBUG_ARGS,
87 "copy replog \"%s\" to \"%s\"\n",
91 * Make sure the destination directory is writable. If not, exit
95 if (( p = strrchr( buf, '/' )) == NULL ) {
100 if ( access( buf, W_OK ) < 0 ) {
101 Debug( LDAP_DEBUG_ANY,
102 "Error: copy_replog (%d): Directory %s is not writable\n",
107 if (( p = strrchr( buf, '/' )) == NULL ) {
112 if ( access( buf, W_OK ) < 0 ) {
113 Debug( LDAP_DEBUG_ANY,
114 "Error: copy_replog (%d): Directory %s is not writable\n",
120 rfp = lock_fopen( src, "r", &lfp );
122 Debug( LDAP_DEBUG_ANY,
123 "Error: copy_replog: Can't lock replog \"%s\" for read: %s\n",
124 src, sys_errlist[ errno ], 0 );
129 dfp = lock_fopen( dst, "a", &dlfp );
131 Debug( LDAP_DEBUG_ANY,
132 "Error: copy_replog: Can't lock replog \"%s\" for write: %s\n",
133 src, sys_errlist[ errno ], 0 );
139 * Make our own private copy of the replication log.
141 while (( p = fgets( rbuf, sizeof( buf ), rfp )) != NULL ) {
144 /* Only truncate the source file if we're not in one-shot mode */
145 if ( !sglob->one_shot_mode ) {
146 /* truncate replication log */
147 truncate( src, (off_t) 0 );
150 if ( lock_fclose( rfp, lfp ) == EOF ) {
151 Debug( LDAP_DEBUG_ANY,
152 "Error: copy_replog: Error closing \"%s\"\n",
155 if ( lock_fclose( dfp, dlfp ) == EOF ) {
156 Debug( LDAP_DEBUG_ANY,
157 "Error: copy_replog: Error closing \"%s\"\n",
167 * Return 1 if the given file exists and has a nonzero size,
168 * 0 if it is empty or nonexistent.
175 static struct stat stbuf;
177 if ( stat( filename, &stbuf ) < 0 ) {
180 return( stbuf.st_size > (off_t ) 0 );