better handling of randomness

[openldap] / servers / slapd / overlays / retcode.c

diff --git a/servers/slapd/overlays/retcode.c b/servers/slapd/overlays/retcode.c
index 5a1bb5be91a7514afe22b1a21391b4b48b4c4268..b966a4b1ddec7809691953a9e5cd9ff913546a23 100644 (file)
--- a/servers/slapd/overlays/retcode.c
+++ b/servers/slapd/overlays/retcode.c
@@ -95,7 +95,11 @@ retcode_sleep( int s )
 {
        /* sleep as required */
        if ( s < 0 ) {
-               return sleep( (unsigned int)(rand() % ( -s )) );
+#if 0  /* use high-order bits for better randomness (Numerical Recipes in "C") */
+               unsigned        r = rand() % (-s);
+#endif
+               unsigned        r = ((double)(-s))*rand()/(RAND_MAX + 1.0);
+               return sleep( r );
        }
 
        if ( s > 0 ) {
@@ -626,6 +630,8 @@ retcode_db_init( BackendDB *be )
        slap_overinst   *on = (slap_overinst *)be->bd_info;
        retcode_t       *rd;
 
+       srand( getpid() );
+
        rd = (retcode_t *)ch_malloc( sizeof( retcode_t ) );
        memset( rd, 0, sizeof( retcode_t ) );
 
@@ -865,7 +871,6 @@ retcode_db_config(
 
                                } else if ( strncasecmp( argv[ i ], "sleeptime=", STRLENOF( "sleeptime=" ) ) == 0 )
                                {
-                                       char            *next;
                                        if ( rdi.rdi_sleeptime != 0 ) {
                                                fprintf( stderr, "%s: line %d: retcode: "
                                                        "\"sleeptime\" already provided.\n",