Very Computer

Hi there,
I want to write my own ps program, but can't find any function calls
for receiving a list of all runnning program's, daemons, defunct
proc's etc.

I'm working on a SCO R3

Kan somebody help please !

--
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Telematic Systems & Services B.V.

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there is a device called /dev/kmem that holds the contents of the kernels
memory.  ps uses this with a routine called nlink() (on some systems) to
read in the kernel memory structure.  All of it is system dependant.

I advise you to just give up a do it another way, mabye by opening a pipe
to /bin/ps and reading from it

Jeff
--
\|||/  _Spike_Man_      ____  | Jeffery L. Thomas  | "The important thing is

  v   first superhero  \ SM / | "This time it will | Curiosity has it own
"more than a cute .sig" \__/  | surely run" - anon | reason for existing."

Quote:>I advise you to just give up a do it another way, mabye by opening a pipe
>to /bin/ps and reading from it

...after first checking to see whether your flavor of UNIX has a "/proc"
file system, as, on those systems, you can probably do most, if not all,
of what "ps" does without having to do grubby kernel diving.

SVR4-flavored systems (e.g., SunOS 5.x/Solaris 2.x) has a "/proc" file
system; I think Linux does so as well (albeit a different one), and
4.4-Lite appears to have some stuff to support such a file system as
well, so 4.4-Lite-derived systems may have one.  Some other UNIXes may
have "/proc" or equivalents as well.

FWIW, on SPP-UX you use the cnx_sysinfo system call.  It's pretty
ugly, but probably not as bad as diving into kmem.
--
Danny Faught -- Convex -- Operating System Demolitions Specialist
"Everything is deeply intertwingled."  (Ted Nelson, _Computer Lib_)

 >>SVR4-flavored systems (e.g., SunOS 5.x/Solaris 2.x) has a "/proc" file
 >>system; I think Linux does so as well (albeit a different one), and
 >>4.4-Lite appears to have some stuff to support such a file system as
 >>well, so 4.4-Lite-derived systems may have one.  Some other UNIXes may
 >>have "/proc" or equivalents as well.
 >FWIW, on SPP-UX you use the cnx_sysinfo system call.  It's pretty
 >ugly, but probably not as bad as diving into kmem.

And on FreeBSD, use the kvm interface instead of /proc (which is _very_
much crippled in comparison to Linux').

                                                                robert