Made use of fcntl(F_SETLK) switchable (and thus became more free with default)

cdrskin/cdrskin.1

@@ -2,7 +2,7 @@
 .\" First parameter, NAME, should be all caps
 .\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
 .\" other parameters are allowed: see man(7), man(1)
-.TH CDRSKIN 1 "April 03, 2007"
+.TH CDRSKIN 1 "April 12, 2007"
 .\" Please adjust this date whenever revising the manpage.
 .\"
 .\" Some roff macros, for reference:
@@ -731,6 +731,9 @@ Linux specific: Abort process if a busy drive is encountered.
 Linux specific: Try to wait for a busy drive to become free.
 This is not guaranteed to work with all drivers. Some need nonblocking i/o.
 .TP
+.BI \--drive_f_setlk
+Linux specific: Try to get exclusive lock on drive device file via fcntl(2).
+.TP
 .BI \--drive_not_exclusive
 Linux specific: Combine --drive_not_f_setlk and --drive_not_o_excl.
 .TP

cdrskin/cdrskin.c

@@ -2101,6 +2101,9 @@ set_dev:;
    } else if(strcmp(argv[i],"--drive_blocking")==0) {
      o->drive_blocking= 1;
 
+   } else if(strcmp(argv[i],"--drive_f_setlk")==0) {
+     o->drive_fcntl_f_setlk= 1;
+
    } else if(strcmp(argv[i],"--drive_not_exclusive")==0) {
      o->drive_exclusive= 0;
      o->drive_fcntl_f_setlk= 0;
@@ -2121,7 +2124,6 @@ set_dev:;
        o->drive_scsi_dev_family= 4;
      else
        o->drive_scsi_dev_family= 0;
-
    } else if(strcmp(argv[i],"--drive_scsi_exclusive")==0) {
      o->drive_exclusive= 2;
 
@@ -2172,6 +2174,7 @@ set_dev:;
      printf("                    (might be triggered by a busy hard disk)\n");
      printf(" --drive_blocking   try to wait for busy drive to become free\n");
      printf("                    (might be stalled by a busy hard disk)\n");
+     printf(" --drive_f_setlk    obtain exclusive lock via fcntl.\n");
      printf(" --drive_not_exclusive  combined not_o_excl and not_f_setlk.\n");
      printf(" --drive_not_f_setlk  do not obtain exclusive lock via fcntl.\n");
      printf(" --drive_not_o_excl   do not ask kernel to prevent opening\n");

cdrskin/cdrskin_timestamp.h

@@ -1 +1 @@
-#define Cdrskin_timestamP "2007.04.13.171347"
+#define Cdrskin_timestamP "2007.04.13.173008"