Re: list of open descriptors

On 05 Jun 2013 19:59, Mike Krebs wrote:

<<SNIP>>

What is the command or API that will show the list of open
descriptors or the number of open descriptors in a job?

For the latter question, "the number of open descriptors in a job", the DosSetRelMaxFH() (Change Maximum Number of File Descriptors) API *apparently could be used* [probably not a desirable means] to determine that information for any value over twenty; i.e. by requesting to decrease the maximum number of file descriptors to twenty... and then presumably, to reset the maximum to its original value that was saved on a prior invocation to retrieve that maximum.

http://pic.dhe.ibm.com/infocenter/iseries/v7r1m0/topic/apis/dossrmfh.htm
_i DosSetRelMaxFH()--Change Maximum Number of File Descriptors i_
"...
The DosSetRelMaxFH() function requests that the system change the maximum number of file descriptors for the calling process (job). The system preserves all file descriptors that are currently open.

...

A request to decrease the maximum number of file descriptors will succeed. The resulting maximum will be the smallest number possible, but may be more than what you expected. For example, assume that the current maximum is 200 and there are 150 open files. A request to decrease the maximum by 75 results in the maximum being decreased by only 50, to 150, to preserve the open file descriptors.

A request to decrease the maximum number of file descriptors to below 20 will succeed, but the maximum will never be decreased below 20.

To retrieve the current maximum number of file descriptors, without any side effects, the value pointed to by pcbReqCount should be set to zero.
..."