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New OS adapter burn_os_is_2k_seekrw() replaces S_ISBLK() with pseudo-drives

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This commit is contained in:
Thomas Schmitt
2010-01-16 12:51:24 +00:00
parent 7ead54c8b9
commit 39fd8b922d
8 changed files with 224 additions and 35 deletions
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79
libburn/sg-libcdio.c
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@ -64,6 +64,12 @@ sg_issue_command() sends a SCSI command to the drive, receives reply,
sg_obtain_scsi_adr() tries to obtain SCSI address parameters.
burn_os_is_2k_seekrw() tells whether the given path leads to a file object
that can be used in 2 kB granularity by lseek(2),
read(2), and possibly write(2) if not read-only..
E.g. a USB stick or a hard disk.
burn_os_stdio_capacity() estimates the emulated media space of stdio-drives.
burn_os_open_track_src() opens a disk file in a way that allows best
@ -709,6 +715,79 @@ int sg_is_enumerable_adr(char* adr)
}
#ifdef __FreeBSD__
#define Libburn_guess_block_devicE 1
#endif
#ifdef __FreeBSD_kernel__
#define Libburn_guess_block_devicE 1
#endif
#ifdef Libburn_guess_block_devicE
/* ts B00115 */
/* The FreeBSD implementation of burn_os_is_2k_seekrw().
On FreeBSD there are no block devices.
*/
static int freebsd_is_2k_seekrw(char *path, int flag)
{
struct stat stbuf;
char *spt;
int i, e;
if (stat(path, &stbuf) == -1)
return 0;
if (S_ISREG(stbuf.st_mode))
return 1;
if (!S_ISCHR(stbuf.st_mode))
return 0;
spt = strrchr(path, '/');
if (spt == NULL)
spt = path;
else
spt++;
e = strlen(spt);
for (i = strlen(spt) - 1; i > 0; i--)
if (spt[i] >= '0' && spt[i] <= '9')
e = i;
if (strncmp(spt, "da", e) == 0) /* SCSI disk. E.g. USB stick. */
return 1;
if (strncmp(spt, "cd", e) == 0) /* SCSI CD drive might be writeable. */
return 1;
if (strncmp(spt, "ad", e) == 0) /* IDE hard drive */
return 1;
if (strncmp(spt, "acd", e) == 0) /* IDE CD drive might be writeable */
return 1;
if (strncmp(spt, "fd", e) == 0) /* Floppy disk */
return 1;
if (strncmp(spt, "fla", e) == 0) /* Flash drive */
return 1;
return 0;
}
#endif /* Libburn_guess_block_devicE */
/* Return 1 if the given path leads to a regular file or a device that can be
seeked, read, and possibly written with 2 kB granularity.
*/
int burn_os_is_2k_seekrw(char *path, int flag)
{
#ifdef Libburn_guess_block_devicE
return freebsd_is_2k_seekrw(path, flag);
#else
struct stat stbuf;
if (stat(path, &stbuf) == -1)
return 0;
if (S_ISREG(stbuf.st_mode))
return 1;
if (S_ISBLK(stbuf.st_mode))
return 1;
return 0;
#endif /* ! Libburn_guess_block_devicE */
}
/** 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.