1 /* lock.c - routines to open and apply an advisory lock to a file */
12 #include <sys/param.h>
16 lock_fopen( char *fname, char *type, FILE **lfp )
21 /* open the lock file */
23 strcat( buf, ".lock" );
24 if ( (*lfp = fopen( buf, "w" )) == NULL ) {
25 Debug( LDAP_DEBUG_ANY, "could not open \"%s\"\n", buf, 0, 0 );
29 /* acquire the lock */
31 while ( flock( fileno( *lfp ), LOCK_EX ) != 0 ) {
33 while ( lockf( fileno( *lfp ), F_LOCK, 0 ) != 0 ) {
38 /* open the log file */
39 if ( (fp = fopen( fname, type )) == NULL ) {
40 Debug( LDAP_DEBUG_ANY, "could not open \"%s\"\n", fname, 0, 0 );
42 flock( fileno( *lfp ), LOCK_UN );
44 lockf( fileno( *lfp ), F_ULOCK, 0 );
53 lock_fclose( FILE *fp, FILE *lfp )
57 lockf( fileno( lfp ), F_ULOCK, 0 );
59 flock( fileno( lfp ), LOCK_UN );
63 return( fclose( fp ) );