SPUG: h2xs and the easy life

[Parr, Ryan]

I'm trying to use h2xs for the first time on an HP-UX machine. I'm trying to
convert <sys/mount.h> into a perl mod. How nice would it be if I didn't have
to write that module, and better yet didn't have to shell out! At least,
that was the train of thought that got me here.

Command run:
h2xs -n FileSystem::Mount /usr/include/sys/mount.h

Everything is created, make runs just fine, make install no probs. I can't
use it though. When I load it (it loads fine) and call
mount('/dev/vg00/lvtest1','/test1') function I get:

Argument "/dev/vg00/lvtest1" isn't numeric in subroutine entry at
/opt/perl5/lib/site_perl/5.6.1/PA-RISC1.1/FileSystem/Mount.pm line 133,
<STDIN> line 2.
Can't locate auto/FileSystem/Mount/mount.al in @INC (@INC contains:
/opt/perl5/lib/5.6.1/PA-RISC1.1 /opt/perl5/lib/5.6.1
/opt/perl5/lib/site_perl/5.6.1/PA-RISC1.1 /opt/perl5/lib/site_perl/5.6.1
/opt/perl5/lib/site_perl .) at ./mount_test.pl line 12

Obviously not what I'm looking for. Argument 1 to the mount() function isn't
supposed to be numeric:


>From mount(2) --
 SYNOPSIS
      #include <sys/mount.h>

      int mount(const char *fs, const char *path, int mflag);

      int mount(const char *fs,
                const char *path,
                      int   mflag,
                const char *fstype,
                const char *dataptr,
                      int   datalen);


New to XS, no real C background. Anyone see any blaring mistakes?

-- Ryan Parr


"Those who make peaceful revolution impossible will make violent revolution
inevitable." -- John F. Kennedy 



-----Original Message-----
From: Benjamin Franks [mailto:benjamin at dzhan.com] 
Sent: Tuesday, March 12, 2002 10:47 AM
To: spug-list at pm.org
Subject: SPUG: sysv shared memory and forking


Let's say I have a parent process that creates and attaches a pointer to a
shared memory segment and then forks off a number of children.  I understand
the children will inherit the parent's address space (copy on write and all
that) and thus the pointer attached to the shared memory segment.  However,
do they inherit the entire memory segment as well?  Or is the sysv memory
segment created outside the parent processes address space to begin with?

Thanks,
--Ben




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