int low_write (unsigned char *buffer,unsigned long length,unsigned long offset)
/*
This is used to change something in the filesystem.
write_access is checked to see if we are allowed to do the actual writing.
As a double safety measure, AllowChanges is rechecked here.
If logging is enabled, we log the change before writing it to the device.
*/
{
char temp [80];
if (!write_access) {
wprintw (command_win,"Error - Write access not available (use enablewrite)\n");
return (0);
}
#ifdef DEBUG
if (!AllowChanges) {
internal_error ("AllowChanges=0 yet enablewrite succeeded","disk","low_write");
return (0);
}
if (device_handle==NULL) {
internal_error ("No device opened yet read requested","disk","low_write");
return (0);
}
if (offset > file_system_info.file_system_size) {
sprintf (temp,"Seek offset %ld is out of range",offset);
internal_error (temp,"disk","low_write");
return (0);
}
#endif
if (LogChanges)
if (!log_changes (buffer,length,offset))
return (0);
if ( (fseek (device_handle,offset,SEEK_SET))==-1) {
wprintw (command_win,"Error - Failed to seek to offset %ld in device %s\n",offset,device_name);
refresh_command_win ();return (0);
};
if ( (fwrite (buffer,1,length,device_handle))==-1) {
wprintw (command_win,"Error - Failed to write to offset %ld in device %s\n",offset,device_name);
refresh_command_win ();return (0);
};
wprintw (command_win,"Data written");refresh_command_win ();
return (1);
}
int low_write (unsigned char *buffer,unsigned long length,unsigned long offset)
{
char temp [80];
if (!write_access) {
wprintw (command_win,"Error - Write access not aviable (use enablewrite)\n");
return (0);
}
#ifdef DEBUG
if (!AllowChanges) {
internal_error ("AllowChanges=0 yet enablewrite succeeded","disk","low_write");
return (0);
}
if (device_handle==NULL) {
internal_error ("No device opened yet read requested","disk","low_write");
return (0);
}
if (offset > file_system_info.file_system_size) {
sprintf (temp,"Seek offset %ld is out of range",offset);
internal_error (temp,"disk","low_write");
return (0);
}
#endif
if (LogChanges)
if (!log_changes (buffer,length,offset))
return (0);
if ( (fseek (device_handle,offset,SEEK_SET))==-1) {
wprintw (command_win,"Error - Failed to seek to offset %ld in device %s\n",offset,device_name);
refresh_command_win ();return (0);
};
if ( (fwrite (buffer,1,length,device_handle))==-1) {
wprintw (command_win,"Error - Failed to write to offset %ld in device %s\n",offset,device_name);
refresh_command_win ();return (0);
};
wprintw (command_win,"Data written");refresh_command_win ();
return (1);
}
