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.
24 #include <sys/types.h>
26 #include <sys/param.h>
29 #include <ac/string.h>
37 extern FILE *lock_fopen LDAP_P(( char *, char *, FILE ** ));
38 extern char *ch_malloc LDAP_P(( unsigned long ));
41 * Forward declarations
43 int file_nonempty LDAP_P(( char * ));
46 #ifdef DECL_SYS_ERRLIST
47 extern char *sys_errlist[];
51 * Forward declarations
53 static int duplicate_replog( char *, char * );
57 * Copy the replication log. Returns 0 on success, 1 if a temporary
58 * error occurs, and -1 if a fatal error occurs.
67 FILE *rfp; /* replog fp */
68 FILE *lfp; /* replog lockfile fp */
69 FILE *dfp; /* duplicate replog fp */
70 FILE *dlfp; /* duplicate replog lockfile fp */
71 static char buf[ MAXPATHLEN ];
72 static char rbuf[ 1024 ];
75 Debug( LDAP_DEBUG_ARGS,
76 "copy replog \"%s\" to \"%s\"\n",
80 * Make sure the destination directory is writable. If not, exit
84 if (( p = strrchr( buf, '/' )) == NULL ) {
89 if ( access( buf, W_OK ) < 0 ) {
90 Debug( LDAP_DEBUG_ANY,
91 "Error: copy_replog (%d): Directory %s is not writable\n",
96 if (( p = strrchr( buf, '/' )) == NULL ) {
101 if ( access( buf, W_OK ) < 0 ) {
102 Debug( LDAP_DEBUG_ANY,
103 "Error: copy_replog (%d): Directory %s is not writable\n",
109 rfp = lock_fopen( src, "r", &lfp );
111 Debug( LDAP_DEBUG_ANY,
112 "Error: copy_replog: Can't lock replog \"%s\" for read: %s\n",
113 src, sys_errlist[ errno ], 0 );
118 dfp = lock_fopen( dst, "a", &dlfp );
120 Debug( LDAP_DEBUG_ANY,
121 "Error: copy_replog: Can't lock replog \"%s\" for write: %s\n",
122 src, sys_errlist[ errno ], 0 );
128 * Make our own private copy of the replication log.
130 while (( p = fgets( rbuf, sizeof( buf ), rfp )) != NULL ) {
133 /* Only truncate the source file if we're not in one-shot mode */
134 if ( !sglob->one_shot_mode ) {
135 /* truncate replication log */
136 truncate( src, (off_t) 0 );
139 if ( lock_fclose( rfp, lfp ) == EOF ) {
140 Debug( LDAP_DEBUG_ANY,
141 "Error: copy_replog: Error closing \"%s\"\n",
144 if ( lock_fclose( dfp, dlfp ) == EOF ) {
145 Debug( LDAP_DEBUG_ANY,
146 "Error: copy_replog: Error closing \"%s\"\n",
156 * Return 1 if the given file exists and has a nonzero size,
157 * 0 if it is empty or nonexistent.
164 static struct stat stbuf;
166 if ( stat( filename, &stbuf ) < 0 ) {
169 return( stbuf.st_size > (off_t ) 0 );