Options used:
debugging=debugging options
full_time FLAG full or extended time format
ms_time_resolution FLAG millisecond time resolution
syslog_device=syslog alternative device
use_info_cache FLAG cache printcap and other information
The LPRng software has a very powerful debugging capability. Since most printing problems occur on remote systems where it is impossible to run debuggers, and since most systems do not do core dumps of SETUID ROOT programs, the LPRng software provides a very verbose set of log file trace messages.
First, serious errors or other information are logged
using the syslog() facilities.
If these are not present on a system, then the messages are
logged to the device specified by syslog_device.
For client programs, the debugging options are specified on the command line and output is directed to STDERR. For the lpd server, debugging commands can be specified on the command line OR as the db=options printcap value. Output is directed to the log file (lf option value, default log).
A typical debug entry has the format 2,network+1,database. This sets the general debugging level to 2, network debugging to 1 and the database debugging level to the default. The following debugging options and levels are supported.
nnn - general purpose debugging level
network - network debugging
database - database debugging
receive - job or command reception debugging
print - detailed job printing debugging
The full_time flag forces the logging and other information which has timestamps to have a full (year, month, day, etc.) timestamp. The ms_time_resolution flag forces millisecond time resolution in the time stamp.
The use_info_cache (default ON) causes lpd to cache printcap and configuration information. This is desirable except when trying to change values in printcap files and test the results. By using use_info_cache@ in the configuration information, you can get immediate responses. Also, see lpc reread for another method.