when blanking, if fd is already open read-only, re-open read/write

1 files changed, 10 insertions, 0 deletions

diff --git a/usr.bin/cdio/mmc.c b/usr.bin/cdio/mmc.c
index a582a2493ac..e30b8c260dc 100644
--- a/usr.bin/cdio/mmc.c
+++ b/usr.bin/cdio/mmc.c
@@ -3,6 +3,7 @@
 #include <sys/stat.h>
 #include <sys/scsiio.h>
 #include <err.h>
+#include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
 #include <string.h>
@@ -10,7 +11,9 @@
 #include "extern.h"
 
 #define WAVHDRLEN 44
+extern int errno;
 extern int fd;
+extern char *cdname;
 extern char *track_types;
 
 int
@@ -29,6 +32,13 @@ blank(void)
 	scr.senselen = SENSEBUFLEN;
 
 	r = ioctl(fd, SCIOCCOMMAND, &scr);
+	if (r == -1 && errno == EPERM) {
+		close(fd);
+		fd = -1;
+		if (! open_cd(cdname, 1))
+			return (-1);
+	}
+	r = ioctl(fd, SCIOCCOMMAND, &scr);
 	return (r == 0 ? scr.retsts : -1);
 }