New operating system adapter "dummy" for stdio on POSIX-like systems

ZeroSixFour
Thomas Schmitt 14 years ago
parent 53e4483460
commit 8c56ca131f
  1. 2
      cdrskin/cdrskin_timestamp.h
  2. 5
      libburn/libdax_msgs.h
  3. 63
      libburn/os-dummy.h
  4. 15
      libburn/os.h
  5. 227
      libburn/sg-dummy.c
  6. 10
      libburn/sg.c

@ -1 +1 @@
#define Cdrskin_timestamP "2009.02.27.211707"
#define Cdrskin_timestamP "2009.03.02.170126"

@ -542,8 +542,13 @@ Range "scdbackup" : 0x00020000 to 0x0002ffff
0x00020167 (SORRY,HIGH) = Drive does not support non-default formatting
0x00020168 (FAILURE,HIGH) = Media not properly formatted. Cannot write.
0x00020169 (WARNING,HIGH) = Last session on media is still open
0x0002016a (FAILURE,HIGH) = No MMC transport adapter is present
0x0002016b (WARNING,HIGH) = No MMC transport adapter is present
0x0002016c (DEBUG,HIGH) = No MMC transport adapter is present
0x00020170 (NOTE,HIGH) = Closing open session before writing new one
0x00020171 (NOTE,HIGH) = Closing BD-R with accidently open session
libdax_audioxtr:
0x00020200 (SORRY,HIGH) = Cannot open audio source file

@ -0,0 +1,63 @@
/* os-dummy.h
Operating system specific libburn definitions and declarations. Included
by os.h in case of compilation for
Unknown POSIX like systems
with the dummy MMC transport adapter sg-dummy.c
Copyright (C) 2009 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
/* 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"
/* The number of above list items */
#define BURN_OS_SIGNAL_COUNT 16
/** To list all signals which shall surely not be caught */
#define BURN_OS_NON_SIGNAL_MACRO_LIST \
SIGKILL, SIGCHLD, SIGSTOP
/* The number of above list items */
#define BURN_OS_NON_SIGNAL_COUNT 3
/* The maximum size for a (SCSI) i/o transaction */
/* Important : MUST be at least 32768 ! */
#define BURN_OS_TRANSPORT_BUFFER_SIZE 65536
/* To hold the position of the most recently delivered address from
device enumeration.
*/
struct burn_drive_enumerator_struct {
int pos;
int info_count;
char **info_list;
};
#define BURN_OS_DEFINE_DRIVE_ENUMERATOR_T \
typedef struct burn_drive_enumerator_struct 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 just_a_dummy;

@ -3,7 +3,7 @@
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
Copyright (C) 2009 Thomas Schmitt <scdbackup@gmx.net>, provided under GPL
*/
#ifndef BURN_OS_H_INCLUDED
@ -20,14 +20,23 @@
#include "os-freebsd.h"
#else /* operating system case distinction */
#else
#ifdef __linux
/* --------- Linux kernels 2.4 and 2.6 with Linux SCSI Generic (sg) -------- */
#include "os-linux.h"
#endif /* End of operating system case distinction */
#else
/* --------- Any other system. With dummy MMC transport sg-dummy.c --------- */
#include "os-dummy.h"
#endif /* ! __linux */
#endif /* ! __FreeBSD__ */
#endif /* ! BURN_OS_H_INCLUDED */

@ -0,0 +1,227 @@
/* -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 8; -*- */
/*
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: default dummy which enables libburn only to work
with stdio: pseudo drive addresses.
For real implementations see sg-linux.c or sg-freebsd.c
*/
#include <unistd.h>
#include <stdio.h>
#include <sys/types.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <string.h>
#include "transport.h"
#include "drive.h"
#include "sg.h"
#include "spc.h"
#include "mmc.h"
#include "sbc.h"
#include "debug.h"
#include "toc.h"
#include "util.h"
#include "libdax_msgs.h"
extern struct libdax_msgs *libdax_messenger;
/** Returns the next index number and the next enumerated drive address.
The enumeration has to cover all available and accessible drives. It is
allowed to return addresses of drives which are not available but under
some (even exotic) circumstances could be available. It is on the other
hand allowed, only to hand out addresses which can really be used right
in the moment of this call. (This implementation chooses the former.)
@param idx An opaque handle. Make no own theories about it.
@param adr Takes the reply
@param adr_size Gives maximum size of reply including final 0
@param initialize 1 = start new,
0 = continue, use no other values for now
-1 = finish
@return 1 = reply is a valid address , 0 = no further address available
-1 = severe error (e.g. adr_size too small)
*/
int sg_give_next_adr(burn_drive_enumerator_t *idx,
char adr[], int adr_size, int initialize)
{
return 0;
}
/** Brings all available, not-whitelist-banned, and accessible drives into
libburn's list of drives.
*/
/* ts A61115: replacing call to sg-implementation internals from drive.c */
int scsi_enumerate_drives(void)
{
libdax_msgs_submit(libdax_messenger, -1, 0x0002016b,
LIBDAX_MSGS_SEV_WARNING, LIBDAX_MSGS_PRIO_HIGH,
"No MMC transport adapter is present. Running on sg-dummy.c.",
0, 0);
return 1;
}
/** Tells wether libburn has the given drive in use or exclusively reserved.
If it is "open" then libburn will eventually call sg_release() on it when
it is time to give up usage resp. reservation.
*/
/** Published as burn_drive.drive_is_open() */
int sg_drive_is_open(struct burn_drive * d)
{
return 0;
}
/** Opens the drive for SCSI commands and - if burn activities are prone
to external interference on your system - obtains an exclusive access lock
on the drive. (Note: this is not physical tray locking.)
A drive that has been opened with sg_grab() will eventually be handed
over to sg_release() for closing and unreserving.
*/
int sg_grab(struct burn_drive *d)
{
libdax_msgs_submit(libdax_messenger, d->global_index, 0x0002016a,
LIBDAX_MSGS_SEV_FAILURE, LIBDAX_MSGS_PRIO_HIGH,
"No MMC transport adapter is present. Running on sg-dummy.c.",
0, 0);
return 0;
}
/** Gives up the drive for SCSI commands and releases eventual access locks.
(Note: this is not physical tray locking.)
*/
int sg_release(struct burn_drive *d)
{
return 0;
}
/** Sends a SCSI command to the drive, receives reply and evaluates wether
the command succeeded or shall be retried or finally failed.
Returned SCSI errors shall not lead to a return value indicating failure.
The callers get notified by c->error. An SCSI failure which leads not to
a retry shall be notified via scsi_notify_error().
The Libburn_log_sg_commandS facility might be of help when problems with
a drive have to be examined. It shall stay disabled for normal use.
@return: 1 success , <=0 failure
*/
int sg_issue_command(struct burn_drive *d, struct command *c)
{
libdax_msgs_submit(libdax_messenger, d->global_index, 0x0002016a,
LIBDAX_MSGS_SEV_FAILURE, LIBDAX_MSGS_PRIO_HIGH,
"No MMC transport adapter is present. Running on sg-dummy.c.",
0, 0);
return -1;
}
/** Tries to obtain SCSI address parameters.
@return 1 is success , 0 is failure
*/
int sg_obtain_scsi_adr(char *path, int *bus_no, int *host_no, int *channel_no,
int *target_no, int *lun_no)
{
libdax_msgs_submit(libdax_messenger, -1, 0x0002016c,
LIBDAX_MSGS_SEV_DEBUG, LIBDAX_MSGS_PRIO_HIGH,
"No MMC transport adapter is present. Running on sg-dummy.c.",
0, 0);
return 0;
}
/** Tells wether a text is a persistent address as listed by the enumeration
functions.
*/
int sg_is_enumerable_adr(char *adr)
{
return(0);
}
/** Estimate the potential payload capacity of a file address.
@param path The address of the file to be examined. If it does not
exist yet, then the directory will be inquired.
@param bytes The pointed value gets modified, but only if an estimation is
possible.
@return -2 = cannot perform necessary operations on file object
-1 = neither path nor dirname of path exist
0 = could not estimate size capacity of file object
1 = estimation has been made, bytes was set
*/
int burn_os_stdio_capacity(char *path, off_t *bytes)
{
struct stat stbuf;
#ifdef Libburn_os_has_statvfS
struct statvfs vfsbuf;
int open_mode = O_RDONLY, fd, ret;
#endif
char testpath[4096], *cpt;
long blocks;
off_t add_size = 0;
testpath[0] = 0;
blocks = *bytes / 512;
if (stat(path, &stbuf) == -1) {
strcpy(testpath, path);
cpt = strrchr(testpath, '/');
if(cpt == NULL)
strcpy(testpath, ".");
else if(cpt == testpath)
testpath[1] = 0;
else
*cpt = 0;
if (stat(testpath, &stbuf) == -1)
return -1;
#ifdef Libburn_if_this_was_linuX
} else if(S_ISBLK(stbuf.st_mode)) {
fd = open(path, open_mode);
if (fd == -1)
return -2;
ret = ioctl(fd, BLKGETSIZE, &blocks);
close(fd);
if (ret == -1)
return -2;
*bytes = ((off_t) blocks) * (off_t) 512;
#endif /* Libburn_if_this_was_linuX */
} else if(S_ISREG(stbuf.st_mode)) {
add_size = stbuf.st_blocks * (off_t) 512;
strcpy(testpath, path);
} else
return 0;
if (testpath[0]) {
#ifdef Libburn_os_has_statvfS
if (statvfs(testpath, &vfsbuf) == -1)
return -2;
*bytes = add_size + ((off_t) vfsbuf.f_bsize) *
(off_t) vfsbuf.f_bavail;
#else /* Libburn_os_has_statvfS */
return 0;
#endif /* ! Libburn_os_has_stavtfS */
}
return 1;
}

@ -1,7 +1,7 @@
/* sg.c
Switcher for operating system dependent transport level modules of libburn.
Copyright (C) 2006 Thomas Schmitt <scdbackup@gmx.net>, provided under GPL
Copyright (C) 2009 Thomas Schmitt <scdbackup@gmx.net>, provided under GPL
*/
@ -10,8 +10,14 @@
#include "sg-freebsd.c"
#else
#ifdef __linux
#include "sg-linux.c"
#endif
#else
#include "sg-dummy.c"
#endif /* ! __linux */
#endif /* ! __FreeBSD__ */

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