Differences From:

File src/file.c part of check-in [d31c0f9c29] - Fix to the pathname simplifer logic. by drh on 2008-11-21 22:16:08. [view]

To:

File src/file.c part of check-in [797d680ef5] - Add code to understand the "https://" prefix on server URLs. Any attempt to use https gives an error at this point, however. This is a work in progress. by drh on 2009-01-13 18:43:47. [view]

@@ -429,5 +429,50 @@
     blob_set(pPath, &zUri[i]);
   }else{
     blob_set(pPath, "/");
   }
+}
+
+/*
+** Construct a random temporary filename into zBuf[].
+*/
+void file_tempname(int nBuf, char *zBuf){
+  static const char *azDirs[] = {
+     "/var/tmp",
+     "/usr/tmp",
+     "/tmp",
+     "/temp",
+     ".",
+  };
+  static const unsigned char zChars[] =
+    "abcdefghijklmnopqrstuvwxyz"
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    "0123456789";
+  unsigned int i, j;
+  struct stat buf;
+  const char *zDir = ".";
+
+  for(i=0; i<sizeof(azDirs)/sizeof(azDirs[0]); i++){
+    if( stat(azDirs[i], &buf) ) continue;
+    if( !S_ISDIR(buf.st_mode) ) continue;
+    if( access(azDirs[i], 07) ) continue;
+    zDir = azDirs[i];
+    break;
+  }
+
+  /* Check that the output buffer is large enough for the temporary file
+  ** name. If it is not, return SQLITE_ERROR.
+  */
+  if( (strlen(zDir) + 17) >= (size_t)nBuf ){
+    fossil_fatal("insufficient space for temporary filename");
+  }
+
+  do{
+    sqlite3_snprintf(nBuf-17, zBuf, "%s/", zDir);
+    j = (int)strlen(zBuf);
+    sqlite3_randomness(15, &zBuf[j]);
+    for(i=0; i<15; i++, j++){
+      zBuf[j] = (char)zChars[ ((unsigned char)zBuf[j])%(sizeof(zChars)-1) ];
+    }
+    zBuf[j] = 0;
+  }while( access(zBuf,0)==0 );
 }