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New API call burn_lookup_device_link()

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This commit is contained in:
Thomas Schmitt
2011-07-28 19:13:39 +00:00
parent 64f7f5d609
commit b47a0e6884
4 changed files with 121 additions and 1 deletions
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84
libburn/drive.c
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@ -15,6 +15,7 @@
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <dirent.h>
/* ts A61007 */
/* #include <a ssert.h> */
@ -2045,6 +2046,7 @@ int burn_drive_convert_fs_adr_sub(char *path, char adr[], int *rec_count)
return 0;
}
/* API */
/** Try to convert a given existing filesystem address into a persistent drive
address. */
int burn_drive_convert_fs_adr(char *path, char adr[])
@ -2056,6 +2058,88 @@ int burn_drive_convert_fs_adr(char *path, char adr[])
}
/* API */
int burn_lookup_device_link(char *dev_adr, char link_adr[],
char *dir_adr, char **ranks, int rank_count, int flag)
{
DIR *dirpt= NULL;
struct dirent *entry;
struct stat link_stbuf;
char *adr= NULL, *namept, *sys_adr= NULL;
int ret, name_rank, found_rank= 0x7fffffff, dirlen, i, rec_count = 0;
static char default_ranks_data[][8] =
{"dvdrw", "cdrw", "dvd", "cdrom", "cd"};
char *default_ranks[5];
link_adr[0] = 0;
if (ranks == NULL) {
for (i = 0; i < 5; i++)
default_ranks[i] = default_ranks_data[i];
ranks = default_ranks;
rank_count= 5;
}
dirlen= strlen(dir_adr) + 1;
if (strlen(dir_adr) + 1 >= BURN_DRIVE_ADR_LEN) {
/* >>> Issue warning about oversized directory address */;
{ret = 0; goto ex;}
}
BURN_ALLOC_MEM(adr, char, BURN_DRIVE_ADR_LEN);
BURN_ALLOC_MEM(sys_adr, char, BURN_DRIVE_ADR_LEN);
dirpt = opendir(dir_adr);
if (dirpt == NULL)
{ret = 0; goto ex;}
strcpy(adr, dir_adr);
strcat(adr, "/");
namept = adr + strlen(dir_adr) + 1;
while(1) {
entry = readdir(dirpt);
if(entry == NULL)
break;
if (strlen(entry->d_name) + dirlen >= BURN_DRIVE_ADR_LEN)
continue;
strcpy(namept, entry->d_name);
if(lstat(adr, &link_stbuf) == -1)
continue;
if((link_stbuf.st_mode & S_IFMT) != S_IFLNK)
continue;
/* Determine rank and omit uninteresting ones */
for(name_rank= 0; name_rank < rank_count; name_rank++)
if(strncmp(namept, ranks[name_rank],
strlen(ranks[name_rank])) == 0)
break;
/* we look for lowest rank */
if(name_rank >= rank_count ||
name_rank > found_rank ||
(name_rank == found_rank &&
strcmp(namept, link_adr + dirlen) >= 0))
continue;
/* Does name point to the same device as dev_adr ? */
ret= burn_drive_resolve_link(adr, sys_adr, &rec_count, 2);
if(ret < 0)
goto ex;
if(ret == 0)
continue;
if(strcmp(dev_adr, sys_adr) == 0) {
strcpy(link_adr, adr);
found_rank= name_rank;
}
}
ret= 2;
if(found_rank < 0x7fffffff)
ret= 1;
ex:;
if(dirpt != NULL)
closedir(dirpt);
BURN_FREE_MEM(adr);
BURN_FREE_MEM(sys_adr);
return(ret);
}
/** A pacifier function suitable for burn_abort.
@param handle If not NULL, a pointer to a text suitable for printf("%s")
*/