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Implemented new API function burn_drive_convert_fs_adr()

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This commit is contained in:
Thomas Schmitt
2006-09-22 17:01:26 +00:00
parent 7937cb5d9b
commit f580ef6637
6 changed files with 198 additions and 15 deletions
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110
libburn/drive.c
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@ -1,5 +1,7 @@
/* -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 8; -*- */
#include <sys/types.h>
#include <sys/stat.h>
#include <malloc.h>
#include <unistd.h>
#include <signal.h>
@ -670,3 +672,111 @@ int burn_drive_is_enumerable_adr(char *adr)
return sg_is_enumerable_adr(adr);
}
/* ts A60922 ticket 33 */
/* Try to find an enumerated address with the given stat.st_rdev number */
int burn_drive_resolve_link(char *path, char adr[])
{
int ret;
char link_target[4096];
fprintf(stderr,"libburn experimental: burn_drive_resolve_link( %s )\n",path);
ret = readlink(path, link_target, sizeof(link_target));
if(ret == -1) {
fprintf(stderr,"libburn experimental: readlink( %s ) returns -1\n",path);
return 0;
}
if(ret >= sizeof(link_target) - 1) {
fprintf(stderr,"libburn experimental: readlink( %s ) returns %d (too much)\n",path,ret);
return -1;
}
link_target[ret] = 0;
ret = burn_drive_convert_fs_adr(link_target, adr);
fprintf(stderr,"libburn experimental: burn_drive_convert_fs_adr( %s ) returns %d\n",link_target,ret);
return ret;
}
/* ts A60922 ticket 33 */
/* Try to find an enumerated address with the given stat.st_rdev number */
int burn_drive_find_devno(dev_t devno, char adr[])
{
char fname[4096];
int i, ret = 0, first = 1;
struct stat stbuf;
while (1) {
ret= sg_give_next_adr(&i, fname, sizeof(fname), first);
if(ret <= 0)
break;
first = 0;
ret = stat(fname, &stbuf);
if(ret == -1)
continue;
if(devno != stbuf.st_rdev)
continue;
if(strlen(fname) >= BURN_DRIVE_ADR_LEN)
return -1;
fprintf(stderr,"libburn experimental: burn_drive_find_devno( 0x%llX ) found %s\n", (long long) devno, fname);
strcpy(adr, fname);
return 1;
}
return 0;
}
/* ts A60922 ticket 33 */
/** 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;
struct stat stbuf;
fprintf(stderr,"libburn experimental: burn_drive_convert_fs_adr( %s )\n",path);
if(burn_drive_is_enumerable_adr(path)) {
if(strlen(path) >= BURN_DRIVE_ADR_LEN)
return -1;
fprintf(stderr,"libburn experimental: burn_drive_is_enumerable_adr( %s ) is true\n",path);
strcpy(adr, path);
return 1;
}
if(lstat(path, &stbuf) == -1) {
fprintf(stderr,"libburn experimental: lstat( %s ) returns -1\n",path);
return 0;
}
if((stbuf.st_mode & S_IFMT) == S_IFLNK) {
ret = burn_drive_resolve_link(path, adr);
if(ret > 0)
return 1;
}
if((stbuf.st_mode&S_IFMT) == S_IFBLK ||
(stbuf.st_mode&S_IFMT) == S_IFCHR) {
ret = burn_drive_find_devno(stbuf.st_rdev, adr);
if(ret > 0)
return 1;
/* >>> if SCSI device :
try to find enumerated device with same Bus,Target,Lun
*/;
}
fprintf(stderr,"libburn experimental: Nothing found for %s \n",path);
return 0;
}