Implemented new API function burn_drive_convert_fs_adr()

cdrskin/cdrskin.c

@@ -164,12 +164,12 @@ or
 #define Cdrskin_libburn_versioN "0.2.3"
 #define Cdrskin_libburn_from_pykix_svN 1
 #define Cdrskin_libburn_has_is_enumerablE 1
+#define Cdrskin_libburn_has_convert_fs_adR 1
 #endif
 
 #ifndef Cdrskin_libburn_versioN
 #define Cdrskin_libburn_versioN "0.2.3"
 #define Cdrskin_libburn_from_pykix_svN 1
-#define Cdrskin_libburn_has_is_enumerablE 1
 #endif
 
 #ifdef Cdrskin_libburn_from_pykix_svN
@@ -1388,10 +1388,14 @@ return:
    2 end program run (--help)
 */
 {
- int i,k,ret,bragg_with_audio= 0;
+ int i,ret,bragg_with_audio= 0;
  char *value_pt,link_adr[Cdrskin_strleN+1];
+
+#ifndef Cdrskin_libburn_has_convert_fs_adR
+ int k;
  char link_target[Cdrskin_strleN+1];
  struct stat stbuf;
+#endif
 
 #ifndef Cdrskin_extra_leaN
  if(argc>1)
@@ -1752,7 +1756,7 @@ final_checks:;
     "cdrskin: HINT  : to run cdrskin under your normal user identity.\n");
    fprintf(stderr,
     "cdrskin: HINT  : Option  --allow_setuid  disables this safety check.\n");
-   ret= 0;
+   ret= 0; goto ex;
  }
 
  if(strlen(o->raw_device_adr)>0 && !o->no_whitelist) {
@@ -1792,12 +1796,27 @@ dev_too_long:;
    }
    if(!o->no_follow_links) {
      strcpy(link_adr,o->device_adr);
+
+#ifdef Cdrskin_libburn_has_convert_fs_adR
+
+     ret = burn_drive_convert_fs_adr(link_adr,o->device_adr);
+     if(ret<0) {
+       fprintf(stderr,
+           "cdrskin: NOTE : Please inform libburn-hackers@pykix.org about:\n");
+       fprintf(stderr,
+	   "                burn_drive_convert_fs_adr() returned %d\n",ret);
+     }
+
+#else 
+
      while(lstat(link_adr,&stbuf)!=-1) {
        if(Cdrpreskin__is_enumerable_adr(link_adr,0))
      break;
        if((stbuf.st_mode&S_IFMT)!=S_IFLNK)
      break;
        ret= readlink(link_adr,link_target,Cdrskin_strleN+1);
+       if(ret==-1)
+         goto after_resolving_links;
        if(ret>=Cdrskin_strleN) {
 link_too_long:;
          fprintf(stderr,
@@ -1816,8 +1835,15 @@ link_too_long:;
          goto link_too_long;
        strcpy(o->device_adr,link_adr);
      }
+
+#endif /* Cdrskin_libburn_has_convert_fs_adR */
+
    }
+#ifndef Cdrskin_libburn_has_convert_fs_adR
+after_resolving_links:;
+#endif
  }
+ ret= 1;
 ex:;
 
 #ifndef Cdrskin_extra_leaN

cdrskin/cdrskin_timestamp.h

@@ -1 +1 @@
-#define Cdrskin_timestamP "2006.09.21.194006"
+#define Cdrskin_timestamP "2006.09.22.170220"

libburn/drive.c

@@ -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;
+}
+

libburn/libburn.h

@@ -584,6 +584,16 @@ int burn_drive_get_adr(struct burn_drive_info *drive_info, char adr[]);
     @return 1 means yes, 0 means no */
 int burn_drive_is_enumerable_adr(char *adr);
 
+/* ts A60922 ticket 33 */
+/** Try to convert a given existing filesystem address into a persistent drive
+    address.
+    @param path The address of an existing file system object
+    @param adr  An application provided array of at least BURN_DRIVE_ADR_LEN
+                characters size. The persistent address gets copied to it.
+    @return     1 = success , 0 = failure , -1 = severe error
+*/
+int burn_drive_convert_fs_adr(char *path, char adr[]);
+
 
 /** Grab a drive. This must be done before the drive can be used (for reading,
     writing, etc).

libburn/sg.c

@@ -58,23 +58,59 @@ static int sgio_test(int fd)
 
 
 /* ts A60922 ticket 33 */
+/** Returns the next index number and the next enumerated drive address.
+    @param idx An opaque number 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
+    @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(int *idx, char adr[], int adr_size, int initialize)
+{
+	static int sg_limit = 32, ata_limit = 26;
+	int baseno = 0;
+
+	if (initialize  == 1)
+		*idx = -1;
+	(*idx)++;
+	if (*idx >= sg_limit)
+		goto next_ata;
+	if (adr_size < 10)
+		return -1;
+	sprintf(adr, "/dev/sg%d", *idx);
+	return 1;
+next_ata:;
+	baseno += sg_limit;
+	if (*idx - baseno >= ata_limit)
+		goto next_nothing;
+	if (adr_size < 9)
+		return -1;
+	sprintf(adr, "/dev/hd%c", 'a' + (*idx - baseno));
+	return 1;
+next_nothing:;
+	baseno += ata_limit;
+	return 0;
+}
+
 int sg_is_enumerable_adr(char *adr)
 {
-	char fname[10];
-	int i;
+	char fname[4096];
+	int i, ret = 0, first = 1;
 
-	for (i = 0; i < 26; i++) {
-		sprintf(fname, "/dev/hd%c", 'a' + i);
+	while (1) {
+		ret= sg_give_next_adr(&i, fname, sizeof(fname), first);
+		if(ret <= 0)
+	break;
+/* <<<
+		fprintf(stderr,"libburn experimental: idx %d : %s\n",i,fname);
+*/
+		first = 0;
 		if (strcmp(adr, fname) == 0)
 			return 1;
+
 	}
-	for (i = 0; i < 32; i++) {
-		sprintf(fname, "/dev/sg%d", i);
-		if (strcmp(adr, fname) == 0)
-			return 1;
-		
-	}
-	return 0;
+	return(0);
 }
 
 

libburn/sg.h

@@ -10,6 +10,7 @@ enum response
 { RETRY, FAIL };
 
 /* ts A60922 ticket 33 */
+int sg_give_next_adr(int *idx, char adr[], int adr_size, int initialize);
 int sg_is_enumerable_adr(char *adr);
 
 void sg_enumerate(void);