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Made consolidaed operating system adapters for ease of porting

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This commit is contained in:
Thomas Schmitt 2006-11-16 11:17:55 +00:00
parent 628e935fe5
commit ff284b3f51
12 changed files with 277 additions and 111 deletions
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3
Makefile.am
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@ -39,6 +39,7 @@ libburn_libburn_la_SOURCES = \
libburn/null.h \
libburn/options.c \
libburn/options.h \
libburn/os.h \
libburn/read.c \
libburn/read.h \
libburn/sbc.c \
@ -184,6 +185,8 @@ EXTRA_DIST = \
cdrskin/wiki_plain.txt \
cdrskin/cleanup.h \
cdrskin/cleanup.c \
libburn/os-freebsd.h \
libburn/os-linux.h \
libburn/sg-freebsd.c \
libburn/sg-linux.c \
COPYING

42
cdrskin/cleanup.c
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@ -23,28 +23,24 @@ typedef void (*sighandler_t)(int);
#include "cleanup.h"
#ifdef __FreeBSD__
/* Signals to be caught */
static int signal_list[]= {
SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGABRT,
SIGFPE, SIGSEGV, SIGPIPE, SIGALRM, SIGTERM,
SIGUSR1, SIGUSR2, SIGXCPU, SIGTSTP, SIGTTIN,
SIGTTOU,
SIGBUS, SIGPROF, SIGSYS, SIGTRAP,
SIGVTALRM, SIGXCPU, SIGXFSZ, -1
};
static char *signal_name_list[]= {
"SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGABRT",
"SIGFPE", "SIGSEGV", "SIGPIPE", "SIGALRM", "SIGTERM",
"SIGUSR1", "SIGUSR2", "SIGXCPU", "SIGTSTP", "SIGTTIN",
"SIGTTOU",
"SIGBUS", "SIGPROF", "SIGSYS", "SIGTRAP",
"SIGVTALRM", "SIGXCPU", "SIGXFSZ", "@"
};
static int signal_list_count= 23;
#ifndef Cleanup_has_no_libburn_os_H
#else /* __FreeBSD__ */
#include "../libburn/os.h"
/* see os.h for name of particular os-*.h where this is defined */
static int signal_list[]= { BURN_OS_SIGNAL_MACRO_LIST , -1};
static char *signal_name_list[]= { BURN_OS_SIGNAL_NAME_LIST , "@"};
static int signal_list_count= BURN_OS_SIGNAL_COUNT;
static int non_signal_list[]= { BURN_OS_NON_SIGNAL_MACRO_LIST, -1};
static int non_signal_list_count= BURN_OS_NON_SIGNAL_COUNT;
#else /* ! Cleanup_has_no_libburn_os_H */
/* Outdated. Linux only. For backward compatibility with pre-libburn-0.2.3 */
/* Signals to be caught */
static int signal_list[]= {
@ -65,8 +61,6 @@ static char *signal_name_list[]= {
};
static int signal_list_count= 24;
#endif /* ! __FreeBSD__ */
/* Signals not to be caught */
static int non_signal_list[]= {
SIGKILL, SIGCHLD, SIGSTOP, SIGURG, -1
@ -74,6 +68,10 @@ static int non_signal_list[]= {
static int non_signal_list_count= 4;
#endif /* Cleanup_has_no_libburn_os_H */
/* run time dynamic part */
static char cleanup_msg[4096]= {""};
static int cleanup_exiting= 0;

5
cdrskin/compile_cdrskin.sh
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@ -32,13 +32,13 @@ do
libvers="-DCdrskin_libburn_cvs_A60220_tS"
libdax_audioxtr_o=
libdax_msgs_o="libburn/message.o"
cleanup_src_or_obj="cdrskin/cleanup.c"
cleanup_src_or_obj="-DCleanup_has_no_libburn_os_H cdrskin/cleanup.c"
elif test "$i" = "-libburn_0_2_2"
then
libvers="-DCdrskin_libburn_0_2_2"
libdax_audioxtr_o=
libdax_msgs_o="libburn/message.o"
cleanup_src_or_obj="cdrskin/cleanup.c"
cleanup_src_or_obj="-DCleanup_has_no_libburn_os_H cdrskin/cleanup.c"
elif test "$i" = "-libburn_0_2_3"
then
libvers="-DCdrskin_libburn_0_2_3"
@ -51,6 +51,7 @@ do
elif test "$i" = "-oldfashioned"
then
def_opts="$def_opts -DCdrskin_oldfashioned_api_usE"
cleanup_src_or_obj="-DCleanup_has_no_libburn_os_H cdrskin/cleanup.c"
elif test "$i" = "-no_largefile"
then
largefile_opts=

42
libburn/cleanup.c
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@ -23,28 +23,24 @@ typedef void (*sighandler_t)(int);
#include "cleanup.h"
#ifdef __FreeBSD__
/* Signals to be caught */
static int signal_list[]= {
SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGABRT,
SIGFPE, SIGSEGV, SIGPIPE, SIGALRM, SIGTERM,
SIGUSR1, SIGUSR2, SIGXCPU, SIGTSTP, SIGTTIN,
SIGTTOU,
SIGBUS, SIGPROF, SIGSYS, SIGTRAP,
SIGVTALRM, SIGXCPU, SIGXFSZ, -1
};
static char *signal_name_list[]= {
"SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGABRT",
"SIGFPE", "SIGSEGV", "SIGPIPE", "SIGALRM", "SIGTERM",
"SIGUSR1", "SIGUSR2", "SIGXCPU", "SIGTSTP", "SIGTTIN",
"SIGTTOU",
"SIGBUS", "SIGPROF", "SIGSYS", "SIGTRAP",
"SIGVTALRM", "SIGXCPU", "SIGXFSZ", "@"
};
static int signal_list_count= 23;
#ifndef Cleanup_has_no_libburn_os_H
#else /* __FreeBSD__ */
#include "../libburn/os.h"
/* see os.h for name of particular os-*.h where this is defined */
static int signal_list[]= { BURN_OS_SIGNAL_MACRO_LIST , -1};
static char *signal_name_list[]= { BURN_OS_SIGNAL_NAME_LIST , "@"};
static int signal_list_count= BURN_OS_SIGNAL_COUNT;
static int non_signal_list[]= { BURN_OS_NON_SIGNAL_MACRO_LIST, -1};
static int non_signal_list_count= BURN_OS_NON_SIGNAL_COUNT;
#else /* ! Cleanup_has_no_libburn_os_H */
/* Outdated. Linux only. For backward compatibility with pre-libburn-0.2.3 */
/* Signals to be caught */
static int signal_list[]= {
@ -65,8 +61,6 @@ static char *signal_name_list[]= {
};
static int signal_list_count= 24;
#endif /* ! __FreeBSD__ */
/* Signals not to be caught */
static int non_signal_list[]= {
SIGKILL, SIGCHLD, SIGSTOP, SIGURG, -1
@ -74,6 +68,10 @@ static int non_signal_list[]= {
static int non_signal_list_count= 4;
#endif /* Cleanup_has_no_libburn_os_H */
/* run time dynamic part */
static char cleanup_msg[4096]= {""};
static int cleanup_exiting= 0;

72
libburn/os-freebsd.h Normal file
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@ -0,0 +1,72 @@
/* os-freebsd.h
Operating system specific libburn definitions and declarations. Included
by os.h in case of compilation for
FreeBSD with CAM
Copyright (C) 2006 Thomas Schmitt <scdbackup@gmx.net>, provided under GPL
*/
#ifndef BURN_OS_H_INCLUDED
#define BURN_OS_H_INCLUDED 1
/** List of all signals which shall be caught by signal handlers and trigger
a graceful abort of libburn. (See man 7 signal.)
*/
/* Once as system defined macros */
#define BURN_OS_SIGNAL_MACRO_LIST \
SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGABRT, \
SIGFPE, SIGSEGV, SIGPIPE, SIGALRM, SIGTERM, \
SIGUSR1, SIGUSR2, SIGXCPU, SIGTSTP, SIGTTIN, \
SIGTTOU, \
SIGBUS, SIGPROF, SIGSYS, SIGTRAP, \
SIGVTALRM, SIGXCPU, SIGXFSZ
/* Once as text 1:1 list of strings for messages and interpreters */
#define BURN_OS_SIGNAL_NAME_LIST \
"SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGABRT", \
"SIGFPE", "SIGSEGV", "SIGPIPE", "SIGALRM", "SIGTERM", \
"SIGUSR1", "SIGUSR2", "SIGXCPU", "SIGTSTP", "SIGTTIN", \
"SIGTTOU", \
"SIGBUS", "SIGPROF", "SIGSYS", "SIGTRAP", \
"SIGVTALRM", "SIGXCPU", "SIGXFSZ"
/* The number of above list items */
#define BURN_OS_SIGNAL_COUNT 23
/** To list all signals which shall surely not be caught */
#define BURN_OS_NON_SIGNAL_MACRO_LIST \
SIGKILL, SIGCHLD, SIGSTOP, SIGURG
/* The number of above list items */
#define BURN_OS_NON_SIGNAL_COUNT 4
/* The maximum size for a (SCSI) i/o transaction */
#define BURN_OS_TRANSPORT_BUFFER_SIZE 65536/2
/** To hold all state information of BSD device enumeration
which are now local in sg_enumerate() . So that sg_give_next_adr()
can work in BSD and sg_enumerate() can use it.
*/
#define BURN_OS_DEFINE_DRIVE_ENUMERATOR_T \
struct burn_drive_enumeration_state { \
union ccb ccb; \
int bufsize, fd; \
unsigned int i; \
int skip_device; \
}; \
typedef struct burn_drive_enumeration_state burn_drive_enumerator_t;
/* The list of operating system dependent elements in struct burn_drive.
To be initialized and used within sg-*.c .
*/
#define BURN_OS_TRANSPORT_DRIVE_ELEMENTS \
struct cam_device* cam;
#endif /* ! BURN_OS_H_INCLUDED */

63
libburn/os-linux.h Normal file
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@ -0,0 +1,63 @@
/* os-linux.h
Operating system specific libburn definitions and declarations. Included
by os.h in case of compilation for
Linux kernels 2.4 and 2.6 with Linux SCSI Generic (sg)
Copyright (C) 2006 Thomas Schmitt <scdbackup@gmx.net>, provided under GPL
*/
/** List of all signals which shall be caught by signal handlers and trigger
a graceful abort of libburn. (See man 7 signal.)
*/
/* Once as system defined macros */
#define BURN_OS_SIGNAL_MACRO_LIST \
SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGABRT, \
SIGFPE, SIGSEGV, SIGPIPE, SIGALRM, SIGTERM, \
SIGUSR1, SIGUSR2, SIGXCPU, SIGTSTP, SIGTTIN, \
SIGTTOU, \
SIGBUS, SIGPOLL, SIGPROF, SIGSYS, SIGTRAP, \
SIGVTALRM, SIGXCPU, SIGXFSZ
/* Once as text 1:1 list of strings for messages and interpreters */
#define BURN_OS_SIGNAL_NAME_LIST \
"SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGABRT", \
"SIGFPE", "SIGSEGV", "SIGPIPE", "SIGALRM", "SIGTERM", \
"SIGUSR1", "SIGUSR2", "SIGXCPU", "SIGTSTP", "SIGTTIN", \
"SIGTTOU", \
"SIGBUS", "SIGPOLL", "SIGPROF", "SIGSYS", "SIGTRAP", \
"SIGVTALRM", "SIGXCPU", "SIGXFSZ"
/* The number of above list items */
#define BURN_OS_SIGNAL_COUNT 24
/** To list all signals which shall surely not be caught */
#define BURN_OS_NON_SIGNAL_MACRO_LIST \
SIGKILL, SIGCHLD, SIGSTOP, SIGURG
/* The number of above list items */
#define BURN_OS_NON_SIGNAL_COUNT 4
/* The maximum size for a (SCSI) i/o transaction */
#define BURN_OS_TRANSPORT_BUFFER_SIZE 65536
/* To hold the index number of the most recently delivered address from
device enumeration.
*/
#define BURN_OS_DEFINE_DRIVE_ENUMERATOR_T \
typedef int burn_drive_enumerator_t;
/* The list of operating system dependent elements in struct burn_drive.
Usually they are initialized in sg-*.c:enumerate_common().
*/
#define BURN_OS_TRANSPORT_DRIVE_ELEMENTS \
int fd; \
\
/* ts A60926 : trying to lock against growisofs /dev/srN, /dev/scdN */ \
int sibling_count; \
int sibling_fds[LIBBURN_SG_MAX_SIBLINGS];

34
libburn/os.h Normal file
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@ -0,0 +1,34 @@
/* os.h
Operating system specific libburn definitions and declarations.
The macros defined here are used by libburn modules in order to
avoid own system dependent case distinctions.
Copyright (C) 2006 Thomas Schmitt <scdbackup@gmx.net>, provided under GPL
*/
#ifndef BURN_OS_H_INCLUDED
#define BURN_OS_H_INCLUDED 1
/*
Operating system case distinction
*/
#ifdef __FreeBSD__
/* ----------------------------- FreeBSD with CAM -------------------------- */
#include "os-freebsd.h"
#else /* operating system case distinction */
/* --------- Linux kernels 2.4 and 2.6 with Linux SCSI Generic (sg) -------- */
#include "os-linux.h"
#endif /* End of operating system case distinction */
#endif /* ! BURN_OS_H_INCLUDED */

29
libburn/sg-freebsd-port.c
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@ -2,15 +2,30 @@
/*
This is the operating system dependent SCSI part of libburn. It implements the
transport level aspects of SCSI control and command i/o.
This is the main operating system dependent SCSI part of libburn. It implements
the transport level aspects of SCSI control and command i/o.
Present implementation: FreeBSD CAM (untested)
PORTING:
There are public functions, used by other parts of libburn, which have to be
implemented in a way that provides libburn with the desired services:
Porting libburn typically will consist of adding a new operating system case
to the following switcher files:
os.h Operating system specific libburn definitions and declarations.
sg.c Operating system dependent transport level modules.
and to derive the following system specific files from existing examples:
os-*.h Included by os.h. You will need some general system knowledge
about signals and knowledge about the storage object needs of your
transport level module sg-*.c.
sg-*.c This source module. You will need special system knowledge about
how to detect all potentially available drives and how to perform
low-level SCSI and drive operations. You will not need to know
about CD burning, MMC or other high level SCSI aspects.
Said low-level operations are defined by a public function interface, which has
to be implemented in a way that provides libburn with the desired services:
sg_give_next_adr() iterates over the set of potentially useful drive
address strings.
@ -35,12 +50,6 @@ sg_obtain_scsi_adr() tries to obtain SCSI address parameters.
Porting hints are marked by the text "PORTING:".
Send feedback to libburn-hackers@pykix.org .
Other source modules where to expect OS dependencies (look for "__FreeBSD__"):
cleanup.c signal_list : add or delete as described in your man 7 signal
transport.h struct burn_drive : OS dependent i/o attributes
BUFFER_SIZE maximum size for a (SCSI) i/o transaction
*/

28
libburn/sg-linux.c
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@ -2,15 +2,30 @@
/*
This is the operating system dependent SCSI part of libburn. It implements the
transport level aspects of SCSI control and command i/o.
This is the main operating system dependent SCSI part of libburn. It implements
the transport level aspects of SCSI control and command i/o.
Present implementation: Linux SCSI Generic (sg)
PORTING:
There are public functions, used by other parts of libburn, which have to be
implemented in a way that provides libburn with the desired services:
Porting libburn typically will consist of adding a new operating system case
to the following switcher files:
os.h Operating system specific libburn definitions and declarations.
sg.c Operating system dependent transport level modules.
and to derive the following system specific files from existing examples:
os-*.h Included by os.h. You will need some general system knowledge
about signals and knowledge about the storage object needs of your
transport level module sg-*.c.
sg-*.c This source module. You will need special system knowledge about
how to detect all potentially available drives and how to perform
low-level SCSI and drive operations. You will not need to know
about CD burning, MMC or other high level SCSI aspects.
Said low-level operations are defined by a public function interface, which has
to be implemented in a way that provides libburn with the desired services:
sg_give_next_adr() iterates over the set of potentially useful drive
address strings.
@ -38,11 +53,6 @@ Send feedback to libburn-hackers@pykix.org .
Hint: You should also look into sg-freebsd-port.c, which is a younger and
in some aspects more straightforward implementation of this interface.
Other source modules where to expect OS dependencies (look for "__FreeBSD__"):
cleanup.c signal_list : add or delete as described in your man 7 signal
transport.h struct burn_drive : OS dependent i/o attributes
BUFFER_SIZE maximum size for a (SCSI) i/o transaction
*/

6
libburn/sg.c
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@ -1,5 +1,9 @@
/* ts A61013 : It would be nice if autotools could do that job */
/* sg.c
Switcher for operating system dependent transport level modules of libburn.
Copyright (C) 2006 Thomas Schmitt <scdbackup@gmx.net>, provided under GPL
*/
#ifdef __FreeBSD__

23
libburn/sg.h
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@ -3,30 +3,13 @@
#ifndef __SG
#define __SG
#ifdef __FreeBSD__
/* To hold all state information of BSD device enumeration
which are now local in sg_enumerate() . So that sg_give_next_adr()
can work in BSD and sg_enumerate() can use it. */
struct burn_drive_enumeration_state {
union ccb ccb;
int bufsize, fd;
unsigned int i;
int skip_device;
};
typedef struct burn_drive_enumeration_state burn_drive_enumerator_t;
#include "os.h"
#else /* __FreeBSD__ */
/* <<< just for testing the C syntax */
struct burn_drive_enumeration_state {
int dummy;
};
typedef struct burn_drive_enumeration_state burn_drive_enumerator_tX;
/* see os.h for name of particular os-*.h where this is defined */
BURN_OS_DEFINE_DRIVE_ENUMERATOR_T
typedef int burn_drive_enumerator_t;
#endif /* ! __FreeBSD__ */
struct burn_drive;
struct command;

21
libburn/transport.h
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@ -4,20 +4,16 @@
#define __TRANSPORT
#include "libburn.h"
#include "os.h"
#include <pthread.h>
/* sg data structures */
#include <sys/types.h>
#ifdef __FreeBSD__
#define BUFFER_SIZE 65536/2
/* see os.h for name of particular os-*.h where this is defined */
#define BUFFER_SIZE BURN_OS_TRANSPORT_BUFFER_SIZE
#else /* __FreeBSD__ */
#define BUFFER_SIZE 65536
#endif /* ! __FreeBSD__ */
enum transfer_direction
{ TO_DRIVE, FROM_DRIVE, NO_TRANSFER };
@ -107,15 +103,10 @@ struct burn_drive
int lun;
char *devname;
#if defined(__FreeBSD__)
struct cam_device* cam;
#else
int fd;
/* ts A60926 : trying to lock against growisofs /dev/srN, /dev/scdN */
int sibling_count;
int sibling_fds[LIBBURN_SG_MAX_SIBLINGS];
#endif
/* see os.h for name of particular os-*.h where this is defined */
BURN_OS_TRANSPORT_DRIVE_ELEMENTS
/* ts A60904 : ticket 62, contribution by elmom */
/**