Enabled osirrox of more file types, curbed with device files

xorriso/xorriso.1

@@ -1596,18 +1596,31 @@ pseudo-drives or as log files.
 But its alter ego, osirrox, is able to extract file objects
 from ISO images and to create, overwrite, or delete file objects on disk.
 .TP
-\fB\-osirrox\fR "on"|"off"
+\fB\-osirrox\fR "on"|"device_files"|"off"
 Setting "off" disables disk filesystem manipulations. This is the default
 unless the program was started with leafname "osirrox". Elsewise
 the capability to restore files can be enabled explicitly by -osirrox "on".
+.br
+To enable restoring of special files by "device_files" is potentially
+dangerous.
+The meaning of the number st_rdev (see man 2 stat) depends much on the
+operating system. Best is to restore device files only to the same system
+from where they were copied. If not enabled, device files in the ISO image
+are ignored during restore operations.
+.br
+Due to a bug of previous versions, device files from previous sessions might
+have been altered to major=0, minor=1. So this combination does not get
+restored.
 .TP
 \fB\-cpx\fR iso_rr_path [***] disk_path
-Extract regular files from the ISO image and store them under the address given
+Extract single leaf file objects from the ISO image and store them under
-by disk_path. If more then one iso_rr_path is given then disk_path must be
+the address given by disk_path. If more then one iso_rr_path is given then
-a directory or non-existent. In the latter case it gets created and the
+disk_path must be a directory or non-existent. In the latter case it gets
-extracted files get installed in it with the same leafnames.
+created. The extracted files get installed in it with the same leafnames.
 .br
 Missing directory components in disk_path will get created, if possible.
+Disk file exclusions are in effect. If this is undesired then perform
+-not_mgt "off" first.
 .TP
 .B Command compatibility emulations:
 .PP

xorriso/xorriso.c

@@ -3823,8 +3823,10 @@ int Xorriso_status(struct XorrisO *xorriso, char *filter, FILE *fp, int flag)
    Xorriso_status_result(xorriso,filter,fp,flag&2);
  }
 
- is_default= !(xorriso->allow_restore);
+ is_default= (xorriso->allow_restore==0);
- sprintf(line,"-osirrox %s\n", xorriso->allow_restore ? "on" : "off");
+ sprintf(line,"-osirrox %s\n",
+    xorriso->allow_restore ? xorriso->allow_restore==2 ? "device_files" : "on"
+                           : "off");
  if(!(is_default && no_defaults))
    Xorriso_status_result(xorriso,filter,fp,flag&2);
 
@@ -5996,7 +5998,8 @@ int Xorriso__mode_to_perms(mode_t st_mode, char perms[10], int flag)
 
 int Xorriso_format_ls_l(struct XorrisO *xorriso, struct stat *stbuf, int flag)
 {
- char *rpt, perms[10];
+ int show_major_minor= 0;
+ char *rpt, perms[10], mm_text[80];
  mode_t st_mode;
 
  rpt= xorriso->result_line;
@@ -6009,11 +6012,13 @@ int Xorriso_format_ls_l(struct XorrisO *xorriso, struct stat *stbuf, int flag)
    strcat(rpt, "-");
  else if(S_ISLNK(st_mode))
    strcat(rpt, "l");
- else if(S_ISBLK(st_mode))
+ else if(S_ISBLK(st_mode)) {
    strcat(rpt, "b");
- else if(S_ISCHR(st_mode))
+   show_major_minor= 1;
+ } else if(S_ISCHR(st_mode)) {
    strcat(rpt, "c");
- else if(S_ISFIFO(st_mode))
+   show_major_minor= 1;
+ } else if(S_ISFIFO(st_mode))
    strcat(rpt, "p");
  else if(S_ISSOCK(st_mode))
    strcat(rpt, "s");
@@ -6027,6 +6032,11 @@ int Xorriso_format_ls_l(struct XorrisO *xorriso, struct stat *stbuf, int flag)
 
  sprintf(rpt+strlen(rpt), "%-8lu ", (unsigned long) stbuf->st_uid);
  sprintf(rpt+strlen(rpt), "%-8lu ", (unsigned long) stbuf->st_gid);
+ if(show_major_minor) {
+   sprintf(mm_text, "%d,%d", (int) ((stbuf->st_rdev>>8)&0xfff),
+          (int) (((stbuf->st_rdev&~0xfffff)>>12) | (stbuf->st_rdev&0xff)));
+   sprintf(rpt+strlen(rpt), "%8s ", mm_text);
+ } else
    sprintf(rpt+strlen(rpt), "%8.f ", (double) stbuf->st_size);
 
  Ftimetxt(stbuf->st_mtime, rpt+strlen(rpt), 0);
@@ -7975,7 +7985,7 @@ int Xorriso_option_blank(struct XorrisO *xorriso, char *mode, int flag)
  if(ret<=0)
    return(2);
 
- if(strcmp(mode, "as_needed")==0)
+ if(strcmp(mode, "as_needed")==0 || mode[0]==0)
    as_needed= 1;
  else if(strcmp(mode, "all")==0 || strcmp(mode, "full")==0)
    mode_flag= 0;
@@ -8008,9 +8018,7 @@ unusable_index:;
    if(idx<0 || idx>255)
      goto unusable_index;
    mode_flag|= (idx<<8);
- } else if(mode[0]==0)
+ } else {
-   mode_flag= !(flag&1);
- else {
    sprintf(xorriso->info_text,
            "%s: Unknown %s mode '%s'",
            cmd, ((flag&1) ? "-format" : "-blank"), mode);
@@ -8669,6 +8677,7 @@ problem_handler:;
  continue;
    goto ex;
  }
+ if(xorriso->pacifier_count>0)
    Xorriso_pacifier_callback(xorriso, "files copied", xorriso->pacifier_count,
                              xorriso->pacifier_total, "", 1);
  ret= !was_failure;
@@ -9589,12 +9598,12 @@ int Xorriso_option_help(struct XorrisO *xorriso, int flag)
 "                 Like -compare but affecting all files below directories.",
 "",
 "Restore options (copying file objects from ISO image to disk filesystem):",
-"  -osirrox \"on\"|\"off\"",
+"  -osirrox \"on\"|\"device_files\"|\"off\"",
 "                 By default \"off\" the inverse operation of xorriso from ISO",
 "                 image to disk filesystem is disabled. \"on\" allows xorriso",
 "                 to create, overwrite, delete files in the disk filesystem.", 
 "  -cpx iso_rr_path [***] disk_path",
-"                 Copy regular files from ISO image to disk filesystem.",
+"                 Copy leaf file objects from ISO image to disk filesystem.",
 "",
 "Compatibility emulation (argument list may be ended by --):",
 "  -as mkisofs  [-help|-o|-R|-J|-V|-P|-f|-graft-points|-path-list|pathspecs]",
@@ -10473,6 +10482,8 @@ int Xorriso_option_osirrox(struct XorrisO *xorriso, char *mode, int flag)
 {
  if(strcmp(mode, "off")==0)
    xorriso->allow_restore= 0;
+ else if(strcmp(mode, "device_files")==0)
+   xorriso->allow_restore= 2;
  else if(strcmp(mode, "on")==0 || mode[0]==0)
    xorriso->allow_restore= 1;
  else {

xorriso/xorriso_private.h

@@ -158,7 +158,7 @@ struct XorrisO { /* the global context of xorriso */
  /* XORRISO options */
  int allow_graft_points;
 
- int allow_restore;
+ int allow_restore; /* 0= disallowed, 1=allowed, 2=device files allowed */
 
  int dialog;
 

xorriso/xorriso_timestamp.h

@@ -1 +1 @@
-#define Xorriso_timestamP "2008.05.22.210835"
+#define Xorriso_timestamP "2008.05.24.092546"

xorriso/xorrisoburn.c

@@ -1474,6 +1474,87 @@ int Xorriso_get_node_by_path(struct XorrisO *xorriso,
 }
 
 
+/* <<< this is not safe
+#define Xorriso_can_get_dev_T 1
+#define Xorriso_get_dev_by_botcH 1
+*/
+
+
+#ifndef Xorriso_can_get_dev_T
+#ifdef Xorriso_standalonE
+/* this is safe */
+#define Xorriso_can_get_dev_T 1
+#define Xorriso_get_dev_by_botcH 1
+#endif /* Xorriso_standalonE */
+#endif /* Xorriso_can_get_dev_T */
+
+
+/* @param flag bit0= do not complain about being unable to retrieve info
+*/
+int Xorriso_node_get_dev(struct XorrisO *xorriso, IsoNode *node,
+                         char *path, dev_t *dev, int flag)
+{
+
+#ifdef Xorriso_can_get_dev_T
+
+/* >>> insert future API call here and remove botch below */
+
+/* <<< */
+#ifdef Xorriso_get_dev_by_botcH
+/* Drilling a hole into libisofs-0.6.4 in order to substitute for the lack
+   of an API call which returns the dev_t number of a IsoSpecial (block or
+   character device).
+*/
+
+/* These are clones from libisofs/node.h */ 
+
+typedef struct iso_extended_info IsoExtendedInfo_0_6_4_xorrisO;
+
+struct Iso_Node_0_6_4_xorrisO
+{   
+    int refcount;
+    enum IsoNodeType type;
+    char *name;
+    mode_t mode;
+    uid_t uid;
+    gid_t gid;
+    time_t atime;
+    time_t mtime;
+    time_t ctime;
+
+    int hidden;
+    IsoDir *parent;
+    IsoNode *next;
+    IsoExtendedInfo_0_6_4_xorrisO *xinfo;
+};
+
+struct Iso_Special_0_6_4_xorrisO
+{
+    struct Iso_Node_0_6_4_xorrisO node;
+    dev_t dev;
+};
+
+ *dev= ((struct Iso_Special_0_6_4_xorrisO *) node)->dev;
+ return(1);
+
+#endif /* Xorriso_get_dev_by_botcH */
+
+#else /* Xorriso_can_get_dev_T */
+
+ char sfe[SfileadrL];
+
+ if(flag&1)
+   return(0);
+ sprintf(xorriso->info_text,
+         "Cannot obtain device major,minor from ISO image file %s",
+         Text_shellsafe(path, sfe, 0));
+ Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, errno, "FAILURE", 0);
+ return(0);
+  
+#endif /* ! Xorriso_can_get_dev_T */
+}
+
+
 /* @param flag bit0= *node is already valid
                bit1= add extra block for size estimation
 */
@@ -1505,11 +1586,13 @@ int Xorriso_fake_stbuf(struct XorrisO *xorriso, char *path, struct stat *stbuf,
    stbuf->st_mode|= S_IFREG;
  else if(LIBISO_ISLNK(*node))
    stbuf->st_mode|= S_IFLNK;
- else if(LIBISO_ISCHR(*node))
+ else if(LIBISO_ISCHR(*node)) {
    stbuf->st_mode|= S_IFCHR;
- else if(LIBISO_ISBLK(*node))
+   Xorriso_node_get_dev(xorriso, *node, path, &(stbuf->st_rdev), 1);
+ } else if(LIBISO_ISBLK(*node)) {
    stbuf->st_mode|= S_IFBLK;
- else if(LIBISO_ISFIFO(*node))
+   Xorriso_node_get_dev(xorriso, *node, path, &(stbuf->st_rdev), 1);
+ } else if(LIBISO_ISFIFO(*node))
    stbuf->st_mode|= S_IFIFO;
  else if(LIBISO_ISSOCK(*node))
    stbuf->st_mode|= S_IFSOCK;
@@ -1524,8 +1607,6 @@ int Xorriso_fake_stbuf(struct XorrisO *xorriso, char *path, struct stat *stbuf,
  stbuf->st_uid= iso_node_get_uid(*node);
  stbuf->st_gid= iso_node_get_gid(*node);
 
- /* >>> stbuf->st_rdev */
-
  if(LIBISO_ISREG(*node))
    stbuf->st_size= iso_file_get_size((IsoFile *) *node)+ (2048 * !!(flag&2));
  else
@@ -2439,16 +2520,22 @@ int Xorriso_restore_implict_properties(struct XorrisO *xorriso, IsoDir *dir,
 #endif /* Osirrox_not_yeT */
 
 
-/* @param flag bit0= minimal transfer: access permissions only
+/* @param flag bit0= Minimal transfer: access permissions only
-   @return <0 severe error , 0 failure , 1 success
+               bit2= This is not a parameter. Do not report if ignored
+   @return <0 severe error , 0 failure , 1 success ,
+           2 regularly not installed (disallowed device, UNIX domain socket)
 */
 int Xorriso_tree_restore_node(struct XorrisO *xorriso, IsoNode *node,
                               char *img_path, char *disk_path, int flag)
 {
  int ret= 0, write_fd= -1, wanted, wret;
- char *what= "[unknown filetype]", sfe[5*SfileadrL], buf[32*1024];
+ char *what= "[unknown filetype]", sfe[5*SfileadrL], sfe2[5*SfileadrL];
+ char buf[32*1024];
+ char *link_target;
  off_t todo, size;
- void *stream2= NULL;
+ void *data_stream= NULL;
+ mode_t mode;
+ dev_t dev= 0;
 
  if(LIBISO_ISDIR(node)) {
    what= "directory";
@@ -2456,8 +2543,10 @@ int Xorriso_tree_restore_node(struct XorrisO *xorriso, IsoNode *node,
 
  } else if(LIBISO_ISREG(node)) {
    what= "regular file";
+
    /* >>> need to exploit node rather  than img_path */
-   ret= Xorriso_iso_file_open(xorriso, img_path, &stream2, 0);
+   ret= Xorriso_iso_file_open(xorriso, img_path, &data_stream, 0);
+
    if(ret<=0)
      goto ex;
    write_fd= open(disk_path,O_WRONLY|O_EXCL|O_CREAT);
@@ -2468,7 +2557,7 @@ int Xorriso_tree_restore_node(struct XorrisO *xorriso, IsoNode *node,
      wanted= sizeof(buf);
      if(wanted>todo)
        wanted= todo;
-     ret= Xorriso_iso_file_read(xorriso, stream2, buf, wanted, 0);
+     ret= Xorriso_iso_file_read(xorriso, data_stream, buf, wanted, 0);
      if(ret<=0)
    break;
      wret= write(write_fd, buf, ret);
@@ -2484,40 +2573,77 @@ int Xorriso_tree_restore_node(struct XorrisO *xorriso, IsoNode *node,
    }  
    close(write_fd);
    write_fd= -1;
-   Xorriso_iso_file_close(xorriso, &stream2, 0);
+   Xorriso_iso_file_close(xorriso, &data_stream, 0);
-   stream2= NULL;
+   data_stream= NULL;
    ret= (todo==0);
 
  } else if(LIBISO_ISLNK(node)) {
    what= "symbolic link";
-
+   link_target= (char *) iso_symlink_get_dest((IsoSymlink *) node);
-   goto not_this_type;
+   ret= symlink(link_target, disk_path);
-   /* >>> restore symbolic link */;
 
  } else if(LIBISO_ISCHR(node)) {
    what= "character device";
+   if(xorriso->allow_restore!=2) {
+ignored:;
+     if(!(flag&4)) {
+       sprintf(xorriso->info_text, "Ignored file type: %s %s = %s", what,
+             Text_shellsafe(img_path,sfe,0), Text_shellsafe(disk_path,sfe2,0));
+       Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "NOTE", 0);
+     }
+     {ret= 2; goto ex;}
+   }
 
+#ifdef Xorriso_can_get_dev_T
+   mode= S_IFCHR | 0777;
+   ret= Xorriso_node_get_dev(xorriso, node, img_path, &dev, 0);
+   if(ret<=0)
+     goto ex;
+   if(dev == (dev_t) 1) {
+probably_damaged:;
+     sprintf(xorriso->info_text,
+            "Most probably damaged device file not restored: mknod %s %s 0 1",
+            Text_shellsafe(disk_path, sfe, 0), LIBISO_ISCHR(node) ? "c" : "b");
+     Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, errno, "FAILURE", 0);
+     ret= 0; goto ex;
+   }
+   ret= mknod(disk_path, mode, dev);
+#else
    goto not_this_type;
-   /* >>> restore character device */;
+#endif
 
  } else if(LIBISO_ISBLK(node)) {
    what= "block device";
+   if(xorriso->allow_restore!=2)
+     goto ignored;
 
+#ifdef Xorriso_can_get_dev_T
+   mode= S_IFBLK | 0777;
+   ret= Xorriso_node_get_dev(xorriso, node, img_path, &dev, 0);
+   if(ret<=0)
+     goto ex;
+   if(dev == (dev_t) 1)
+     goto probably_damaged;
+   ret= mknod(disk_path, mode, dev);
+#else
    goto not_this_type;
-   /* >>> restore block device */;
+#endif
 
  } else if(LIBISO_ISFIFO(node)) {
    what= "named pipe";
-
+   mode= S_IFIFO | 0777;
-   goto not_this_type;
+   ret= mknod(disk_path, mode, dev);
-   /* >>> restore fifo */;
 
  } else if(LIBISO_ISSOCK(node)) {
-   what= "";
+   what= "unix socket";
-   /* restoring a socket file makes no sense */;
+   /* Restoring a socket file is not possible. One rather needs to restart
+      the service which temporarily created the socket. */
+   goto ignored;
 
  } else {
+#ifndef Xorriso_can_get_dev_T
 not_this_type:;
+#endif
    sprintf(xorriso->info_text, "Cannot restore file type '%s'", what);
    Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "SORRY", 0);
    ret= 0; goto ex;
@@ -2530,11 +2656,15 @@ cannot_restore:;
    Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, errno, "FAILURE", 0);
    ret= 0; goto ex;
  }
+ if(LIBISO_ISLNK(node))
+   ret= 1;
+ else
    ret= Xorriso_restore_properties(xorriso, disk_path, node, flag&1);
 ex:;
  if(write_fd>0)
    close(write_fd);
- Xorriso_iso_file_close(xorriso, &stream2, 0);
+ if(data_stream!=NULL)
+   Xorriso_iso_file_close(xorriso, &data_stream, 0);
  return(ret);
 }
 
@@ -2718,14 +2848,15 @@ attach_source:;
          img_path_pt= img_path;
 
        ret= Xorriso_tree_restore_node(xorriso, node, img_path_pt, path,
-                                      !!(flag&64));
+                                      (flag&4) | !!(flag&64));
        if(ret<=0) {
          sprintf(xorriso->info_text, "Restoring failed:  %s = %s",
              Text_shellsafe(img_path,sfe,0), Text_shellsafe(disk_path,sfe2,0));
          Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
          return(0);
        }
-
+       if(ret==2)
+         return(3);
        xorriso->pacifier_count++;
        if(xorriso->pacifier_count%100 && !(flag&2))
          Xorriso_pacifier_callback(xorriso, "files restored",