How to use lsof(List Opened Files) in a C/C++ application?

Question

Is there any way to get all opened sockets using c++? I know the lsof command and this is what I\'m looking for, but how to use it in a c++ application?

Answer 1

The lsof command is prepared specifically such that it can be used from other programs including C, see the section: OUTPUT FOR OTHER PROGRAMS of man lsof for more information. For example you can invoke lsof with -F p and it will output the pid of the processes prefixed with 'p':

$ lsof -F p /some/file
p1234
p4321

you can then use popen to execute this commmand in a child process and read from its standard output.