Can I find out how many file descriptors currently used in a process ?

[bamore]

In my application of the process is getting out of file descriptors( MAX is configured as 64 ).
Is there any way i can call some function(s) in a C program to find out number of file descriptors currently used in a process?
Thanks.

 

[bomberman]

See if this helps:

http://sunsolve.sun.com/pub-cgi/retrieve.pl?doc=ffaqs/01406&zone_32=setrlimit

Tom Pietschmann
DST Systems, Inc.
Kansas City, MO

 

[bamore]

Hi bomberman,
Thanks for your response however i did not see anything in this link about how can we see total number of FDs currently used by a process?
Anyway i found out at least one way: using lsof utility we can find out about the FDs currently used by a process!

 

[dreammer]

you can try pfiles <pid> | wc -l or ls /proc/<proc>/fd | wc -l to get an estimate.

 

[dreammer]

Sorry I meant ls /proc/<pid>/fd | wc -l
If you have lsof, you can do a lsof | wc -l too.

King Tan
Attachmate Corp.
SCNA,SCSA,HP-UX SCA