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-rw-r--r--systems/texlive/tlnet/tlpkg/tlperl/lib/Sys/Hostname.pm156
1 files changed, 156 insertions, 0 deletions
diff --git a/systems/texlive/tlnet/tlpkg/tlperl/lib/Sys/Hostname.pm b/systems/texlive/tlnet/tlpkg/tlperl/lib/Sys/Hostname.pm
new file mode 100644
index 0000000000..8b5dde1445
--- /dev/null
+++ b/systems/texlive/tlnet/tlpkg/tlperl/lib/Sys/Hostname.pm
@@ -0,0 +1,156 @@
+package Sys::Hostname;
+
+use strict;
+
+use Carp;
+
+require Exporter;
+
+our @ISA = qw/ Exporter /;
+our @EXPORT = qw/ hostname /;
+
+our $VERSION;
+
+use warnings ();
+
+our $host;
+
+BEGIN {
+ $VERSION = '1.22';
+ {
+ local $SIG{__DIE__};
+ eval {
+ require XSLoader;
+ XSLoader::load();
+ };
+ warn $@ if $@;
+ }
+}
+
+
+sub hostname {
+ @_ and warnings::warnif("deprecated", "hostname() doesn't accept any arguments. This will become fatal in Perl 5.32");
+
+ # method 1 - we already know it
+ return $host if defined $host;
+
+ # method 1' - try to ask the system
+ $host = ghname() if defined &ghname;
+ return $host if defined $host;
+
+ if ($^O eq 'VMS') {
+
+ # method 2 - no sockets ==> return DECnet node name
+ eval { local $SIG{__DIE__}; $host = (gethostbyname('me'))[0] };
+ if ($@) { return $host = $ENV{'SYS$NODE'}; }
+
+ # method 3 - has someone else done the job already? It's common for the
+ # TCP/IP stack to advertise the hostname via a logical name. (Are
+ # there any other logicals which TCP/IP stacks use for the host name?)
+ $host = $ENV{'ARPANET_HOST_NAME'} || $ENV{'INTERNET_HOST_NAME'} ||
+ $ENV{'MULTINET_HOST_NAME'} || $ENV{'UCX$INET_HOST'} ||
+ $ENV{'TCPWARE_DOMAINNAME'} || $ENV{'NEWS_ADDRESS'};
+ return $host if $host;
+
+ # method 4 - does hostname happen to work?
+ my($rslt) = `hostname`;
+ if ($rslt !~ /IVVERB/) { ($host) = $rslt =~ /^(\S+)/; }
+ return $host if $host;
+
+ # rats!
+ $host = '';
+ croak "Cannot get host name of local machine";
+
+ }
+ elsif ($^O eq 'MSWin32') {
+ ($host) = gethostbyname('localhost');
+ chomp($host = `hostname 2> NUL`) unless defined $host;
+ return $host;
+ }
+ else { # Unix
+ # is anyone going to make it here?
+
+ local $ENV{PATH} = '/usr/bin:/bin:/usr/sbin:/sbin'; # Paranoia.
+
+ # method 2 - syscall is preferred since it avoids tainting problems
+ # XXX: is it such a good idea to return hostname untainted?
+ eval {
+ local $SIG{__DIE__};
+ require "syscall.ph";
+ $host = "\0" x 65; ## preload scalar
+ syscall(&SYS_gethostname, $host, 65) == 0;
+ }
+
+ # method 2a - syscall using systeminfo instead of gethostname
+ # -- needed on systems like Solaris
+ || eval {
+ local $SIG{__DIE__};
+ require "sys/syscall.ph";
+ require "sys/systeminfo.ph";
+ $host = "\0" x 65; ## preload scalar
+ syscall(&SYS_systeminfo, &SI_HOSTNAME, $host, 65) != -1;
+ }
+
+ # method 3 - trusty old hostname command
+ || eval {
+ local $SIG{__DIE__};
+ local $SIG{CHLD};
+ $host = `(hostname) 2>/dev/null`; # BSDish
+ }
+
+ # method 4 - use POSIX::uname(), which strictly can't be expected to be
+ # correct
+ || eval {
+ local $SIG{__DIE__};
+ require POSIX;
+ $host = (POSIX::uname())[1];
+ }
+
+ # method 5 - sysV uname command (may truncate)
+ || eval {
+ local $SIG{__DIE__};
+ $host = `uname -n 2>/dev/null`; ## sysVish
+ }
+
+ # bummer
+ || croak "Cannot get host name of local machine";
+
+ # remove garbage
+ $host =~ tr/\0\r\n//d;
+ $host;
+ }
+}
+
+1;
+
+__END__
+
+=head1 NAME
+
+Sys::Hostname - Try every conceivable way to get hostname
+
+=head1 SYNOPSIS
+
+ use Sys::Hostname;
+ $host = hostname;
+
+=head1 DESCRIPTION
+
+Attempts several methods of getting the system hostname and
+then caches the result. It tries the first available of the C
+library's gethostname(), C<`$Config{aphostname}`>, uname(2),
+C<syscall(SYS_gethostname)>, C<`hostname`>, C<`uname -n`>,
+and the file F</com/host>. If all that fails it C<croak>s.
+
+All NULs, returns, and newlines are removed from the result.
+
+=head1 AUTHOR
+
+David Sundstrom E<lt>F<sunds@asictest.sc.ti.com>E<gt>
+
+Texas Instruments
+
+XS code added by Greg Bacon E<lt>F<gbacon@cs.uah.edu>E<gt>
+
+=cut
+