ref: 1c7a44d2526fffcab4aef1376284bf80b53fb652
parent: cdd38de0e1113e141cd1988c7dfd43f9ee7f7a55
author: Sam Hocevar <[email protected]>
date: Mon Jul 11 07:58:58 EDT 2005
* src/ioctl.c: under Solaris, use libsmedia for ioctls when available. Code
reworked from a
--- a/src/ioctl.c
+++ b/src/ioctl.c
@@ -2,7 +2,7 @@
* ioctl.c: DVD ioctl replacement function
*****************************************************************************
* Copyright (C) 1999-2001 VideoLAN
- * $Id: ioctl.c,v 1.23 2003/01/16 22:58:29 sam Exp $
+ * $Id$
*
* Authors: Markus Kuespert <[email protected]>
* Samuel Hocevar <[email protected]>
@@ -76,6 +76,7 @@
# include <sys/scsi.h>
#endif
#ifdef SOLARIS_USCSI
+# include <dlfcn.h>
# include <unistd.h>
# include <stropts.h>
# include <sys/scsi/scsi_types.h>
@@ -112,6 +113,7 @@
*****************************************************************************/
#if defined( SOLARIS_USCSI )
static void SolarisInitUSCSI( struct uscsi_cmd *p_sc, int i_type );
+static int SolarisSendUSCSI( int fd, struct uscsi_cmd *p_sc );
#endif
/*****************************************************************************
@@ -192,7 +194,7 @@
rs_cdb.cdb_opaque[ 6 ] = i_layer;
rs_cdb.cdb_opaque[ 7 ] = DVD_STRUCT_COPYRIGHT;
- i_ret = ioctl(i_fd, USCSICMD, &sc);
+ i_ret = SolarisSendUSCSI(i_fd, &sc);
if( i_ret < 0 || sc.uscsi_status ) {i_ret = -1;
@@ -351,7 +353,7 @@
rs_cdb.cdb_opaque[ 7 ] = DVD_STRUCT_DISCKEY;
rs_cdb.cdb_opaque[ 10 ] = *pi_agid << 6;
- i_ret = ioctl( i_fd, USCSICMD, &sc );
+ i_ret = SolarisSendUSCSI( i_fd, &sc );
if( i_ret < 0 || sc.uscsi_status )
{@@ -513,7 +515,7 @@
rs_cdb.cdb_opaque[ 5 ] = ( i_pos ) & 0xff;
rs_cdb.cdb_opaque[ 10 ] = DVD_REPORT_TITLE_KEY | (*pi_agid << 6);
- i_ret = ioctl( i_fd, USCSICMD, &sc );
+ i_ret = SolarisSendUSCSI( i_fd, &sc );
if( i_ret < 0 || sc.uscsi_status )
{@@ -665,7 +667,7 @@
rs_cdb.cdb_opaque[ 10 ] = DVD_REPORT_AGID | (*pi_agid << 6);
- i_ret = ioctl( i_fd, USCSICMD, &sc );
+ i_ret = SolarisSendUSCSI( i_fd, &sc );
if( i_ret < 0 || sc.uscsi_status )
{@@ -787,7 +789,7 @@
rs_cdb.cdb_opaque[ 10 ] = DVD_REPORT_CHALLENGE | (*pi_agid << 6);
- i_ret = ioctl( i_fd, USCSICMD, &sc );
+ i_ret = SolarisSendUSCSI( i_fd, &sc );
if( i_ret < 0 || sc.uscsi_status )
{@@ -921,7 +923,7 @@
rs_cdb.cdb_opaque[ 10 ] = DVD_REPORT_ASF;
- i_ret = ioctl( i_fd, USCSICMD, &sc );
+ i_ret = SolarisSendUSCSI( i_fd, &sc );
if( i_ret < 0 || sc.uscsi_status )
{@@ -1054,7 +1056,7 @@
rs_cdb.cdb_opaque[ 10 ] = DVD_REPORT_KEY1 | (*pi_agid << 6);
- i_ret = ioctl( i_fd, USCSICMD, &sc );
+ i_ret = SolarisSendUSCSI( i_fd, &sc );
if( i_ret < 0 || sc.uscsi_status )
{@@ -1175,7 +1177,7 @@
rs_cdb.cdb_opaque[ 10 ] = DVD_INVALIDATE_AGID | (*pi_agid << 6);
- i_ret = ioctl( i_fd, USCSICMD, &sc );
+ i_ret = SolarisSendUSCSI( i_fd, &sc );
if( i_ret < 0 || sc.uscsi_status )
{@@ -1299,7 +1301,7 @@
p_buffer[ 1 ] = 0xe;
memcpy( p_buffer + 4, p_challenge, DVD_CHALLENGE_SIZE );
- if( ioctl( i_fd, USCSICMD, &sc ) < 0 || sc.uscsi_status )
+ if( SolarisSendUSCSI( i_fd, &sc ) < 0 || sc.uscsi_status )
{return -1;
}
@@ -1436,7 +1438,7 @@
p_buffer[ 1 ] = 0xa;
memcpy( p_buffer + 4, p_key, DVD_KEY_SIZE );
- if( ioctl( i_fd, USCSICMD, &sc ) < 0 || sc.uscsi_status )
+ if( SolarisSendUSCSI( i_fd, &sc ) < 0 || sc.uscsi_status )
{return -1;
}
@@ -1578,7 +1580,7 @@
rs_cdb.cdb_opaque[ 10 ] = DVD_REPORT_RPC;
- i_ret = ioctl( i_fd, USCSICMD, &sc );
+ i_ret = SolarisSendUSCSI( i_fd, &sc );
if( i_ret < 0 || sc.uscsi_status )
{@@ -1728,7 +1730,7 @@
p_buffer[ 1 ] = 6;
p_buffer[ 4 ] = i_pdrc;
- i_ret = ioctl( i_fd, USCSICMD, &sc );
+ i_ret = SolarisSendUSCSI( i_fd, &sc );
if( i_ret < 0 || sc.uscsi_status )
{@@ -1900,6 +1902,70 @@
p_sc->uscsi_cdblen = 12;
USCSI_TIMEOUT( p_sc, 15 );
+}
+
+/*****************************************************************************
+ * SolarisSendUSCSI: send a USCSICMD structure to the Solaris kernel
+ * for execution
+ *****************************************************************************
+ * When available, this function uses the function smedia_uscsi_cmd()
+ * from Solaris' libsmedia library (Solaris 9 or newer) to execute the
+ * USCSI command. smedia_uscsi_cmd() allows USCSI commands for
+ * non-root users on removable media devices on Solaris 9; sending the
+ * USCSI command directly to the device using the USCSICMD ioctl fails
+ * with an EPERM error on Solaris 9.
+ *
+ * The code will fall back to the USCSICMD ioctl method, when
+ * libsmedia.so is not available or does not export the
+ * smedia_uscsi_cmd() function (on Solaris releases upto and including
+ * Solaris 8). Fortunatelly, on these old releases non-root users are
+ * allowed to perform USCSICMD ioctls on removable media devices.
+ *****************************************************************************/
+static int SolarisSendUSCSI( int i_fd, struct uscsi_cmd *p_sc )
+{+ void *p_handle;
+
+ /* We use static variables to keep track of the libsmedia symbols, which
+ * is harmless even in a multithreaded program because the library and
+ * its symbols will always be mapped at the same address. */
+ static int b_tried = 0;
+ static int b_have_sm = 0;
+ static void * (*p_get_handle) ( int32_t );
+ static int (*p_uscsi_cmd) ( void *, struct uscsi_cmd * );
+ static int (*p_release_handle) ( void * );
+
+ if( !b_tried )
+ {+ void *p_lib;
+
+ p_lib = dlopen( "libsmedia.so", RTLD_NOW );
+ if( p_lib )
+ {+ p_get_handle = dlsym( p_lib, "smedia_get_handle" );
+ p_uscsi_cmd = dlsym( p_lib, "smedia_uscsi_cmd" );
+ p_release_handle = dlsym( p_lib, "smedia_release_handle" );
+
+ if( p_get_handle && p_uscsi_cmd && p_release_handle )
+ {+ b_have_sm = 1;
+ }
+ else
+ {+ dlclose( p_lib );
+ }
+ }
+
+ b_tried = 1;
+ }
+
+ if( b_have_sm && (p_handle = p_get_handle(i_fd)) )
+ {+ int i_ret = p_uscsi_cmd( p_handle, p_sc );
+ p_release_handle( p_handle );
+ return i_ret;
+ }
+
+ return ioctl( i_fd, USCSICMD, p_sc );
}
#endif