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Add a small `gethostname' package. It uses __sysctl(2), and thus

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avoids the kludgy backquotes that are required by now (`hostname`).

Usage:

require "gethostname.pl";
$thishost = &gethostname'gethostname;
This commit is contained in:
joerg 1996-02-13 13:17:49 +00:00
parent 796e5c4e86
commit ed7c1e1183
2 changed files with 40 additions and 3 deletions
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6
gnu/usr.bin/perl/lib/Makefile
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@ -2,9 +2,9 @@ PLIBDIR= ${DESTDIR}/usr/share/perl
PLIB+= abbrev.pl assert.pl bigfloat.pl bigint.pl bigrat.pl cacheout.pl
PLIB+= chat2.pl complete.pl ctime.pl dumpvar.pl exceptions.pl fastcwd.pl
PLIB+= find.pl finddepth.pl flush.pl getcwd.pl getopts.pl importenv.pl
PLIB+= look.pl newgetopt.pl open2.pl perldb.pl pwd.pl shellwords.pl
PLIB+= stat.pl syslog.pl termcap.pl timelocal.pl validate.pl
PLIB+= find.pl finddepth.pl flush.pl getcwd.pl gethostname.pl getopts.pl
PLIB+= importenv.pl look.pl newgetopt.pl open2.pl perldb.pl pwd.pl
PLIB+= shellwords.pl stat.pl syslog.pl termcap.pl timelocal.pl validate.pl
NOOBJ=

37
gnu/usr.bin/perl/lib/gethostname.pl Normal file
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@ -0,0 +1,37 @@
#
# Simple package to get the hostname via __sysctl(2).
#
# Written 13-Feb-96 by Jörg Wunsch, interface business GmbH Dresden.
# Placed in the public domain.
#
# $Id$
#
package gethostname;
require "sys/syscall.ph";
require "sys/sysctl.ph";
#
# usage:
#
# require "gethostname.pl";
# printf "This machine is named \"%s\".\n", &gethostname'gethostname;
#
sub gethostname {
# get hostname via sysctl(2)
local($name, $oldval, $oldlen, $len);
$name = pack("LL", &CTL_KERN, &KERN_HOSTNAME);
# 64-byte string to get the hostname
$oldval =
" ";
$oldlen = pack("L", length($oldval));
syscall(&SYS___sysctl, $name, 2, $oldval, $oldlen, 0, 0) != -1 ||
die "Cannot get hostname via sysctl(2), errno = $!\n";
($len) = unpack("L", $oldlen);
return substr($oldval, 0, $len);
}
1;