libburnia/libburn
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Curbed endless links to 20 hops

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This commit is contained in:
Thomas Schmitt 2006-09-27 14:22:32 +00:00
parent b81aa81c61
commit c70fc7215d
2 changed files with 27 additions and 6 deletions
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2
cdrskin/cdrskin_timestamp.h
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@ -1 +1 @@
#define Cdrskin_timestamP "2006.09.27.134332" #define Cdrskin_timestamP "2006.09.27.142312"

29
libburn/drive.c
View File

@ -28,6 +28,8 @@ static struct burn_drive drive_array[255];
static int drivetop = -1; static int drivetop = -1;
int burn_drive_is_open(struct burn_drive *d); int burn_drive_is_open(struct burn_drive *d);
int burn_drive_convert_fs_adr_sub(char *path, char adr[], int *rec_count);
/* ts A60904 : ticket 62, contribution by elmom */ /* ts A60904 : ticket 62, contribution by elmom */
/* splitting former burn_drive_free() (which freed all, into two calls) */ /* splitting former burn_drive_free() (which freed all, into two calls) */
@ -723,14 +725,23 @@ int burn_drive_is_enumerable_adr(char *adr)
return sg_is_enumerable_adr(adr); return sg_is_enumerable_adr(adr);
} }
#define BURN_DRIVE_MAX_LINK_DEPTH 20
/* ts A60922 ticket 33 */ /* ts A60922 ticket 33 */
/* Try to find an enumerated address with the given stat.st_rdev number */ /* Try to find an enumerated address with the given stat.st_rdev number */
int burn_drive_resolve_link(char *path, char adr[]) int burn_drive_resolve_link(char *path, char adr[], int *recursion_count)
{ {
int ret; int ret;
char link_target[4096], msg[4096+100], link_adr[4096], *adrpt; char link_target[4096], msg[4096+100], link_adr[4096], *adrpt;
burn_drive_adr_debug_msg("burn_drive_resolve_link( %s )", path); burn_drive_adr_debug_msg("burn_drive_resolve_link( %s )", path);
if (*recursion_count >= BURN_DRIVE_MAX_LINK_DEPTH) {
burn_drive_adr_debug_msg(
"burn_drive_resolve_link aborts because link too deep",
NULL);
return 0;
}
(*recursion_count)++;
ret = readlink(path, link_target, sizeof(link_target)); ret = readlink(path, link_target, sizeof(link_target));
if (ret == -1) { if (ret == -1) {
burn_drive_adr_debug_msg("readlink( %s ) returns -1", path); burn_drive_adr_debug_msg("readlink( %s ) returns -1", path);
@ -751,7 +762,7 @@ int burn_drive_resolve_link(char *path, char adr[])
} else } else
adrpt = link_target; adrpt = link_target;
} }
ret = burn_drive_convert_fs_adr(adrpt, adr); ret = burn_drive_convert_fs_adr_sub(adrpt, adr, recursion_count);
sprintf(msg,"burn_drive_convert_fs_adr( %s ) returns %d", sprintf(msg,"burn_drive_convert_fs_adr( %s ) returns %d",
link_target, ret); link_target, ret);
burn_drive_adr_debug_msg(msg, NULL); burn_drive_adr_debug_msg(msg, NULL);
@ -891,7 +902,7 @@ int burn_drive_find_scsi_equiv(char *path, char adr[])
/* ts A60922 ticket 33 */ /* ts A60922 ticket 33 */
/** Try to convert a given existing filesystem address into a persistent drive /** Try to convert a given existing filesystem address into a persistent drive
address. */ address. */
int burn_drive_convert_fs_adr(char *path, char adr[]) int burn_drive_convert_fs_adr_sub(char *path, char adr[], int *rec_count)
{ {
int ret; int ret;
struct stat stbuf; struct stat stbuf;
@ -911,7 +922,7 @@ int burn_drive_convert_fs_adr(char *path, char adr[])
return 0; return 0;
} }
if((stbuf.st_mode & S_IFMT) == S_IFLNK) { if((stbuf.st_mode & S_IFMT) == S_IFLNK) {
ret = burn_drive_resolve_link(path, adr); ret = burn_drive_resolve_link(path, adr, rec_count);
if(ret > 0) if(ret > 0)
return 1; return 1;
burn_drive_adr_debug_msg("link fallback via stat( %s )", path); burn_drive_adr_debug_msg("link fallback via stat( %s )", path);
@ -933,3 +944,13 @@ int burn_drive_convert_fs_adr(char *path, char adr[])
return 0; return 0;
} }
/** Try to convert a given existing filesystem address into a persistent drive
address. */
int burn_drive_convert_fs_adr(char *path, char adr[])
{
int ret, rec_count = 0;
ret = burn_drive_convert_fs_adr_sub(path, adr, &rec_count);
return ret;
}