system(3) and free swap space
2007-12-25 7:23:00
I originally asked about system(3) function which doesn't work if
there isn't enough virtual memory left (ie. available swap space).
However, with SunOS4.1 and 4.1.1 there was a lot of free swap space
left and the system() still didn't work! As a matter of fact, the
system() doesn't work if you don't have at least as much memory left
as the process doing system() call has already reserved!
There seems to be a bug in 4.1 and 4.1.1. The system() uses fork()
instead of vfork() and thus duplicates the entire process before
exec().
Skip even knew the right patch IDs, which are:
100266-01 libc-4.1.1: libc replacement (with U.S. encryption)
100267-01 libc-4.1.1: libc replacement
The bug ID seems to be (according to Skip):
1051619 system() uses fork() instead of vfork()
My thanks to:
skip%skipsun@fsg.com (Skip Gilbrech)
per@erix.ericsson.se (Per Hedeland)
stevo@elroy.Jpl.Nasa.Gov (Steve Groom)
knutson@sw.mcc.com (Jim Knutson)
Yours,
Kari Vaaranen
---
Kari Vaaranen * (So long, and thanks for all the fish!)
Tampella Papertech Oy * email INTERNET : kjv@tampella.fi
P.O.BOX 267, SF-33101 * Phone internat. : +358 31 2412434
Tampere, FINLAND * Telefax internat.: +358 31 115440
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