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root/cvsroot/COMP/SCRAM/src/Utilities/setarchitecture.pm

Comparing COMP/SCRAM/src/Utilities/setarchitecture.pm (file contents):
Revision 1.2 by williamc, Mon Mar 1 11:01:36 1999 UTC vs.
Revision 1.8 by sashby, Fri Jul 12 16:37:10 2002 UTC

#	Line 1 | Line 1
1	<	# simply set the architecture variable based on uname
2	<	#
3	<
1	>	###############################################################
2	>	# setarchitecture                                             #
3	>	###############################################################
4	>	# modified : Fri Jul 12 13:55:16 2002 / SFA                   #
5	>	# params   : none                                             #
6	>	#          :                                                  #
7	>	#          :                                                  #
8	>	#          :                                                  #
9	>	# function : Set the architecture variable. Use simple uname  #
10	>	#          : query for Sun: for Linux, alos try libc checking.#
11	>	#          :                                                  #
12	>	#          :                                                  #
13	>	###############################################################
14		package setarchitecture;
15		require 5.001;
16		require Exporter;
17		@ISA = qw(Exporter);
18		@EXPORT = qw(setarch);
19
20	<	# unix systems
21	<	sub setarch {
22	<	$uname=`uname -a`;
23	<	($OSname, $hostname, $OSversion, @rest) = split / /, $uname;
24	<	# simply set to OS type and version
25	<	$ENV{SCRAM_ARCH}="${OSname}__${OSversion}";
26	<	print "Setting Architecture to $ENV{SCRAM_ARCH}\n";
27	<	}
20	>	# Currently, this is only used for UNIX systems. Not entirely sure what
21	>	# happens on Windows (most people tend to use CYGWIN). Eventually, this
22	>	# will need to be improved for non-UNIX architectures:
23	>	sub setarch
24	>	{
25	>	my $uname=`uname -a`;
26	>	my ($OSname, $hostname, $OSversion, @rest) = split / /, $uname;
27	>	my $lddcmd="ldd /bin/ls";
28	>
29	>	# Retain only the first two version digits
30	>	# of os version from uname:
31	>	if ( $OSname =~ SunOS )
32	>	{
33	>	$OSversion =~ s/^(.\..)\..*/\1/;
34	>	}
35	>	# Linux:
36	>	elsif ( $OSname =~ Linux )
37	>	{
38	>	# Firstly we check for the kernel version.
39	>	$OSversion =~ s/^(.\..)\..*/\1/;
40	>	# Now, we also check for the libc version to confirm (or otherwise)
41	>	# the choice determined by the previous step:
42	>	# Open the ldd command as a pipe:
43	>	my $pid = open(LDD,"$lddcmd 2>&1 |");
44	>
45	>	# Check that we were able to fork:
46	>	if (defined($pid))
47	>	{
48	>	# Loop over lines of output:
49	>	while (<LDD>)
50	>	{
51	>	chomp $_;
52	>	# Grab something that looks like "libc.*":
53	>	if (my ($libc) = ($_ =~ /\s+libc\.so.*\s.*\s(.*)\s.*/))
54	>	{
55	>	# Check if this libc thing is a soft link (it should be), then
56	>	# find out what the thingy is that the link points to:
57	>	if ( -l $libc && defined($value = readlink $libc))
58	>	{
59	>	# Extract the useful numeric info from this:
60	>	my ($libcmaj,$libcmin,$libcpatch) = ($value =~ /^libc-([0-9])\.([0-9])\.([0-9])\.so/);
61	>
62	>	# Set the arch accordingly:
63	>	if ($libcmaj == 2 && $libcmin == 1 && $libcpatch >= 3)
64	>	{
65	>	$ENV{SCRAM_ARCH}="Linux__2.2";
66	>	}
67	>
68	>	if ($libcmaj == 2 && $libcmin == 2 && $libcpatch >= 4)
69	>	{
70	>	$ENV{SCRAM_ARCH}="Linux__2.4";
71	>	}
72	>	}
73	>	# No need to check other lines:
74	>	last;
75	>	}
76	>	}
77	>	}
78	>	else
79	>	# Fork failed, so we must fall back to
80	>	# the normal mechanism to define the arch:
81	>	{
82	>	$ENV{SCRAM_ARCH}="${OSname}__${OSversion}";
83	>	}
84	>	}
85	>	else
86	>	{
87	>	# At this point it looks like the platform is "other".
88	>	# Set SCRAM_ARCH anyway to the default:
89	>	$ENV{SCRAM_ARCH}="${OSname}__${OSversion}";
90	>	}
91	>
92	>	# Set arch flag to [OS type]__[OSversion] if not set by now:
93	>	if ( ! defined $ENV{SCRAM_ARCH} )
94	>	{
95	>	$ENV{SCRAM_ARCH}="${OSname}__${OSversion}";
96	>	}
97	>
98	>	return (0);
99	>	}

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