I have used Perl for some time now allowing my C skills to wither away. Perl has given me options like
getting the presently launched perl program's process id with the constant variable $$. This gives me a unique number which I can identify this launched program as (unique from the many that can be launched at one time on a multitasking OS). Perl also allows me to use a command called FLOCK which will lock a file from being written over by someone else giving exclusive rights to whoever.
Those commands are great but I need them for C. I am translating my Perl code and really need to know how to get the PROCESS ID for my launched compiled C program. I also need to LOCK a file so that the launched program can have exclusive rights to a file. And all this in ANSI-C because I want it to work on any platform (Unix/NT) that I compile it for.
Can you please help me identify these commands in ANSI-C? Or possibly give me alternative methods to use. Thank you VERY much!!