From 8d5daf11d361ed3d9835553406b0bceaf479c3b6 Mon Sep 17 00:00:00 2001
From: Thomas Schmitt <scdbackup@gmx.net>
Date: Sat, 22 Sep 2007 14:02:34 +0000
Subject: [PATCH] Enabled treatment==2 in isoburn_drive_scan_and_grab()

---
 libisoburn/trunk/src/burn_wrap.c | 84 +++++++++++++++++++++-----------
 1 file changed, 56 insertions(+), 28 deletions(-)

diff --git a/libisoburn/trunk/src/burn_wrap.c b/libisoburn/trunk/src/burn_wrap.c
index ea607e31..06d81a47 100644
--- a/libisoburn/trunk/src/burn_wrap.c
+++ b/libisoburn/trunk/src/burn_wrap.c
@@ -89,16 +89,26 @@ ex:
 int isoburn_drive_scan_and_grab(struct burn_drive_info *drive_infos[],
                                 char *adr, int load)
 {
- int ret, treatment= 0;
+ int ret, treatment= 0, conv_ret;
  struct stat stbuf;
  char libburn_drive_adr[BURN_DRIVE_ADR_LEN], *adrpt, *stdio_adr= NULL;
  struct isoburn *o= NULL;
 
+ /*                Treatment decision criteria
+    Prefixes "grow:"            leads to: treatment 1, image growing
+    Prefix   "modify:"          leads to: treatment 2, image modification
+    Anything else is decided automatically
+    If suitable as libburn drive address: treatment 1  ("stdio:" fits here)
+    else if non-existent or regular file: treatment 2
+    else if block device                : treatment 1
+    else                                : unsuitable target 
+ */
+
  adrpt= adr;
  if(strncmp(adr, "grow:", 5)==0) {
    treatment= 1;
    adrpt+= 5;
-   if(stat(adrpt,&stbuf)!=-1)
+   if(stat(adrpt,&stbuf)!=-1) {
      if(S_ISREG(stbuf.st_mode) || S_ISBLK(stbuf.st_mode)) {
        stdio_adr= calloc(strlen(adrpt)+6+1, 1);
        if(stdio_adr==NULL)
@@ -106,42 +116,60 @@ int isoburn_drive_scan_and_grab(struct burn_drive_info *drive_infos[],
        sprintf(stdio_adr, "stdio:%s", adrpt); /* use pseudo-drive */
        adrpt= stdio_adr;
      }
+   }
  } else if(strncmp(adr, "modify:", 7)==0) {
-   treatment= 2;
    adrpt+= 7;
- }
- ret= burn_drive_convert_fs_adr(adrpt, libburn_drive_adr);
- if(treatment==0) {
-   if(ret>0)
-     treatment= 1;
-   else
-     treatment= 2;
- } else if(treatment==1 && ret<=0) {
-
-   /* >>> unsuitable drive address */;
-
-    ret= 0; goto ex;
- }
-
- if(treatment==1) {
-   ret= burn_drive_scan_and_grab(drive_infos, adrpt, load);
-   if(ret<=0)
-     goto ex;
-   ret= isoburn_welcome_media(&o, (*drive_infos)[0].drive, 0);
-   if(ret<=0)
-     goto ex;
- } else {
-   if(stat(adrpt,&stbuf)!=-1)
+   treatment= 2;
+   if(stat(adrpt,&stbuf)!=-1) {
      if(! S_ISREG(stbuf.st_mode)) {
 
-       /* >>> unsuitable target for modify */;
+       /* >>> we need a gateway to the libisofs/libburn message system  */;
+       fprintf(stderr, "LIBISOBURN: unsuitable target for modify: '%s'\n",adr);
 
        ret= 0; goto ex;
      }
+   }
+   sprintf(stdio_adr, "stdio:%s", adrpt); /* use pseudo-drive */
+   adrpt= stdio_adr;
+ } else {
 
-   /* >>> welcome file for modfication treatment */;
+     /* >>> interpret "read:" , "write:" for modification on MMC drives */;
 
  }
+
+ conv_ret= burn_drive_convert_fs_adr(adrpt, libburn_drive_adr);
+ if(treatment==0) { /* undecided yet, make a decision or declare failure */
+   if(conv_ret>0)
+     treatment= 1;  /* Device file leading to MMC drive or "stdio:" address */
+   else {
+     if(stat(adrpt,&stbuf)==-1) {
+       /* burn_drive_scan_and_grab() will check whether the directory exists */
+       treatment= 2;
+     } else if(S_ISREG(stbuf.st_mode))
+       treatment= 2;
+     else if(S_ISBLK(stbuf.st_mode))
+       treatment= 1;
+     if(treatment>=0) {
+       sprintf(stdio_adr, "stdio:%s", adrpt); /* use pseudo-drive */
+       adrpt= stdio_adr;
+       conv_ret= 1; /* All "stdio:" addresses are ok for now */
+     }
+   }
+ }
+ if(conv_ret<=0 || treatment<=0) { /* Failure */
+
+   /* >>> we need a gateway to the libisofs/libburn message system  */;
+   fprintf(stderr, "LIBISOBURN: unsuitable drive address: '%s'\n", adrpt);
+
+   ret= 0; goto ex;
+ }
+
+ ret= burn_drive_scan_and_grab(drive_infos, adrpt, load);
+ if(ret<=0)
+   goto ex;
+ ret= isoburn_welcome_media(&o, (*drive_infos)[0].drive, 0);
+ if(ret<=0)
+   goto ex;
  if(o!=NULL)
    o->treatment= treatment;