package Config;
use Exporter ();
@ISA = (Exporter);
@EXPORT = qw(%Config);
@EXPORT_OK = qw(myconfig config_sh config_vars);

$] == 5.00404
  or die "Perl lib version (5.00404) doesn't match executable version ($])";

# This file was created by configpm when Perl was built. Any changes
# made to this file will be lost the next time perl is built.

##
## This file was produced by running the Configure script.  It holds all
## the definitions figured out by Configure.  Should you modify any of
## these values, do not forget to propagate your changes by running
## "Configure -S"; or, equivalently, you may run each .SH file yourself.
##
#
## Configuration time: Wed Feb  3 00:50:04 PST 1999
## Configured by: torin
## Target system: linux perv 2.0.36 #2 wed nov 18 03:00:48 pst 1998 i686 unknown 
#

my $config_sh = <<'!END!';
archlibexp='/usr/lib/perl5/i386-linux/5.004'
archname='i386-linux'
cc='cc'
ccflags='-Dbool=char -DHAS_BOOL -D_REENTRANT'
cppflags='-Dbool=char -DHAS_BOOL -D_REENTRANT'
dlsrc='dl_dlopen.xs'
dynamic_ext='DB_File Fcntl GDBM_File IO NDBM_File ODBM_File Opcode POSIX SDBM_File Socket'
extensions='DB_File Fcntl GDBM_File IO NDBM_File ODBM_File Opcode POSIX SDBM_File Socket'
installarchlib='/usr/lib/perl5/i386-linux/5.004'
installprivlib='/usr/lib/perl5'
libpth='/usr/local/lib /lib /usr/lib'
libs='-lnsl -lndbm -lgdbm -ldbm -ldb -ldl -lm -lc -lposix -lcrypt'
osname='linux'
osvers='2.0.36'
prefix='/usr'
privlibexp='/usr/lib/perl5'
sharpbang='#!'
shsharp='true'
sig_name='ZERO HUP INT QUIT ILL TRAP ABRT BUS FPE KILL USR1 SEGV USR2 PIPE ALRM TERM STKFLT CHLD CONT STOP TSTP TTIN TTOU URG XCPU XFSZ VTALRM PROF WINCH IO PWR UNUSED IOT CLD POLL '
sig_num='0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 6 17 29 '
so='so'
startsh='#!/bin/sh'
static_ext=' '
Author=''
CONFIG='true'
Date='$Date'
Header=''
Id='$Id'
Locker=''
Log='$Log'
Mcc='Mcc'
PATCHLEVEL='4'
RCSfile='$RCSfile'
Revision='$Revision'
SUBVERSION='4'
Source=''
State=''
afs='false'
alignbytes='4'
aphostname=''
ar='ar'
archlib='/usr/lib/perl5/i386-linux/5.004'
archobjs=''
awk='awk'
baserev='5.0'
bash=''
bin='/usr/bin'
bincompat3='n'
binexp='/usr/bin'
bison=''
byacc='byacc'
byteorder='1234'
c=''
castflags='0'
cat='cat'
cccdlflags='-fpic'
ccdlflags='-rdynamic'
cf_by='torin'
cf_email='torin@perv.daft.com'
cf_time='Wed Feb  3 00:50:04 PST 1999'
chgrp=''
chmod=''
chown=''
clocktype='clock_t'
comm='comm'
compress=''
contains='grep'
cp='cp'
cpio=''
cpp='cpp'
cpp_stuff='42'
cpplast='-'
cppminus='-'
cpprun='cc -E'
cppstdin='cc -E'
cryptlib=''
csh='csh'
d_Gconvert='gcvt((x),(n),(b))'
d_access='define'
d_alarm='define'
d_archlib='define'
d_attribut='define'
d_bcmp='define'
d_bcopy='define'
d_bincompat3='undef'
d_bsd='undef'
d_bsdgetpgrp='undef'
d_bsdpgrp='undef'
d_bsdsetpgrp='undef'
d_bzero='define'
d_casti32='define'
d_castneg='define'
d_charvspr='undef'
d_chown='define'
d_chroot='define'
d_chsize='undef'
d_closedir='define'
d_const='define'
d_crypt='define'
d_csh='undef'
d_cuserid='define'
d_dbl_dig='define'
d_difftime='define'
d_dirnamlen='undef'
d_dlerror='define'
d_dlopen='define'
d_dlsymun='undef'
d_dosuid='define'
d_dup2='define'
d_eofnblk='define'
d_eunice='undef'
d_fchmod='define'
d_fchown='define'
d_fcntl='define'
d_fd_macros='define'
d_fd_set='define'
d_fds_bits='define'
d_fgetpos='define'
d_flexfnam='define'
d_flock='define'
d_fork='define'
d_fpathconf='define'
d_fsetpos='define'
d_fstatfs='define'
d_fstatvfs='undef'
d_ftime='undef'
d_getgrps='define'
d_gethent='define'
d_gethname='undef'
d_getlogin='define'
d_getmntent='define'
d_getpgid='define'
d_getpgrp2='undef'
d_getpgrp='define'
d_getppid='define'
d_getprior='define'
d_gettimeod='define'
d_gnulibc='define'
d_hasmntopt='define'
d_htonl='define'
d_index='undef'
d_inetaton='define'
d_isascii='define'
d_killpg='define'
d_link='define'
d_locconv='define'
d_lockf='define'
d_lstat='define'
d_mblen='define'
d_mbstowcs='define'
d_mbtowc='define'
d_memcmp='define'
d_memcpy='define'
d_memmove='define'
d_memset='define'
d_mkdir='define'
d_mkfifo='define'
d_mktime='define'
d_msg='define'
d_msgctl='define'
d_msgget='define'
d_msgrcv='define'
d_msgsnd='define'
d_mymalloc='undef'
d_nice='define'
d_oldarchlib='undef'
d_oldsock='undef'
d_open3='define'
d_pathconf='define'
d_pause='define'
d_phostname='undef'
d_pipe='define'
d_poll='define'
d_portable='define'
d_pwage='undef'
d_pwchange='undef'
d_pwclass='undef'
d_pwcomment='undef'
d_pwexpire='undef'
d_pwquota='undef'
d_readdir='define'
d_readlink='define'
d_rename='define'
d_rewinddir='define'
d_rmdir='define'
d_safebcpy='define'
d_safemcpy='undef'
d_sanemcmp='define'
d_seekdir='define'
d_select='define'
d_sem='define'
d_semctl='define'
d_semget='define'
d_semop='define'
d_setegid='define'
d_seteuid='define'
d_setgrps='define'
d_setlinebuf='define'
d_setlocale='define'
d_setpgid='define'
d_setpgrp2='undef'
d_setpgrp='define'
d_setprior='define'
d_setregid='define'
d_setresgid='undef'
d_setresuid='undef'
d_setreuid='define'
d_setrgid='undef'
d_setruid='undef'
d_setsid='define'
d_sfio='undef'
d_shm='define'
d_shmat='define'
d_shmatprototype='define'
d_shmctl='define'
d_shmdt='define'
d_shmget='define'
d_sigaction='define'
d_sigsetjmp='define'
d_socket='define'
d_sockpair='define'
d_statblks='undef'
d_statfsflags='undef'
d_stdio_cnt_lval='undef'
d_stdio_ptr_lval='define'
d_stdiobase='define'
d_stdstdio='define'
d_strchr='define'
d_strcoll='define'
d_strctcpy='define'
d_strerrm='strerror(e)'
d_strerror='define'
d_strtod='define'
d_strtol='define'
d_strtoul='define'
d_strxfrm='define'
d_suidsafe='undef'
d_symlink='define'
d_syscall='define'
d_sysconf='define'
d_sysernlst=''
d_syserrlst='define'
d_system='define'
d_tcgetpgrp='define'
d_tcsetpgrp='define'
d_telldir='define'
d_time='define'
d_times='define'
d_truncate='define'
d_tzname='define'
d_umask='define'
d_uname='define'
d_vfork='undef'
d_void_closedir='undef'
d_voidsig='define'
d_voidtty=''
d_volatile='define'
d_vprintf='define'
d_wait4='define'
d_waitpid='define'
d_wcstombs='define'
d_wctomb='define'
d_xenix='undef'
date='date'
db_hashtype='u_int32_t'
db_prefixtype='size_t'
defvoidused='15'
direntrytype='struct dirent'
dlext='so'
eagain='EAGAIN'
echo='echo'
egrep='egrep'
emacs=''
eunicefix=':'
exe_ext=''
expr='expr'
find='find'
firstmakefile='makefile'
flex=''
fpostype='fpos_t'
freetype='void'
full_csh='/bin/csh'
full_sed='/bin/sed'
gcc=''
gccversion='2.7.2.3'
gidtype='gid_t'
glibpth='/usr/shlib  /shlib /usr/lib/pa1.1 /usr/lib/large /lib /usr/lib /usr/lib/386 /lib/386 /lib/large /usr/lib/small /lib/small /usr/ccs/lib /usr/ucblib /usr/local/lib '
grep='grep'
groupcat=''
groupstype='gid_t'
gzip='gzip'
h_fcntl='false'
h_sysfile='true'
hint='recommended'
hostcat=''
huge=''
i_bsdioctl=''
i_db='define'
i_dbm='define'
i_dirent='define'
i_dld='undef'
i_dlfcn='define'
i_fcntl='undef'
i_float='define'
i_gdbm='define'
i_grp='define'
i_limits='define'
i_locale='define'
i_malloc='define'
i_math='define'
i_memory='undef'
i_mntent='define'
i_ndbm='define'
i_neterrno='undef'
i_niin='define'
i_pwd='define'
i_rpcsvcdbm='undef'
i_sfio='undef'
i_sgtty='undef'
i_shadow='define'
i_stdarg='define'
i_stddef='define'
i_stdlib='define'
i_string='define'
i_sysdir='define'
i_sysfile='define'
i_sysfilio='undef'
i_sysin='undef'
i_sysioctl='define'
i_sysmount='define'
i_sysndir='undef'
i_sysparam='define'
i_sysresrc='define'
i_sysselct='define'
i_syssockio=''
i_sysstat='define'
i_sysstatvfs='undef'
i_systime='define'
i_systimek='undef'
i_systimes='define'
i_systypes='define'
i_sysun='define'
i_syswait='define'
i_termio='undef'
i_termios='define'
i_time='undef'
i_unistd='define'
i_utime='define'
i_values='define'
i_varargs='undef'
i_varhdr='stdarg.h'
i_vfork='undef'
incpath=''
inews=''
installbin='/usr/bin'
installman1dir='/usr/man/man1'
installman3dir='/usr/man/man3'
installscript='/usr/bin'
installsitearch='/usr/local/lib/site_perl/i386-linux'
installsitelib='/usr/local/lib/site_perl'
intsize='4'
known_extensions='DB_File Fcntl GDBM_File IO NDBM_File ODBM_File Opcode POSIX SDBM_File Socket'
ksh=''
large=''
ld='cc'
lddlflags='-shared -L/usr/local/lib'
ldflags=' -L/usr/local/lib'
less='less'
lib_ext='.a'
libc=''
libperl='libperl.a'
libswanted='sfio net socket inet nsl nm ndbm gdbm dbm db malloc dl dld ld sun m c cposix posix ndir dir crypt ucb BSD PW x'
line='line'
lint=''
lkflags=''
ln='ln'
lns='/bin/ln -s'
locincpth='/usr/local/include /opt/local/include /usr/gnu/include /opt/gnu/include /usr/GNU/include /opt/GNU/include'
loclibpth='/usr/local/lib /opt/local/lib /usr/gnu/lib /opt/gnu/lib /usr/GNU/lib /opt/GNU/lib'
longsize='4'
lp=''
lpr=''
ls='ls'
lseektype='off_t'
mail=''
mailx=''
make='/usr/bin/make'
make_set_make='#'
mallocobj=''
mallocsrc=''
malloctype='void *'
man1dir='/usr/man/man1'
man1direxp='/usr/man/man1'
man1ext='1p'
man3dir='/usr/man/man3'
man3direxp='/usr/man/man3'
man3ext='3pm'
medium=''
mips=''
mips_type=''
mkdir='mkdir'
models='none'
modetype='mode_t'
more='more'
mv=''
myarchname='i686-linux'
mydomain='.daft.com'
myhostname='perv'
myuname='linux perv 2.0.36 #2 wed nov 18 03:00:48 pst 1998 i686 unknown '
n='-n'
nm_opt=''
nm_so_opt='--dynamic'
nroff='nroff'
o_nonblock='O_NONBLOCK'
obj_ext='.o'
oldarchlib=''
oldarchlibexp=''
optimize='-O2'
orderlib='false'
package='perl5'
pager='/usr/bin/less'
passcat=''
patchlevel='4'
path_sep=':'
perl='perl'
perladmin='none'
perlpath='/usr/bin/perl'
pg='pg'
phostname='hostname'
plibpth=''
pmake=''
pr=''
prefixexp='/usr'
privlib='/usr/lib/perl5'
prototype='define'
randbits='31'
ranlib=':'
rd_nodata='-1'
rm='rm'
rmail=''
runnm='false'
scriptdir='/usr/bin'
scriptdirexp='/usr/bin'
sed='sed'
selecttype='fd_set *'
sendmail='sendmail'
sh='/bin/sh'
shar=''
shmattype='void *'
shortsize='2'
shrpenv=''
signal_t='void'
sitearch='/usr/local/lib/site_perl/i386-linux'
sitearchexp='/usr/local/lib/site_perl/i386-linux'
sitelib='/usr/local/lib/site_perl'
sitelibexp='/usr/local/lib/site_perl'
sizetype='size_t'
sleep=''
smail=''
small=''
sockethdr=''
socketlib=''
sort='sort'
spackage='Perl5'
spitshell='cat'
split=''
ssizetype='ssize_t'
startperl='#!/usr/bin/perl'
stdchar='char'
stdio_base='((fp)->_IO_read_base)'
stdio_bufsiz='((fp)->_IO_read_end - (fp)->_IO_read_base)'
stdio_cnt='((fp)->_IO_read_end - (fp)->_IO_read_ptr)'
stdio_ptr='((fp)->_IO_read_ptr)'
strings='/usr/include/string.h'
submit=''
subversion='4'
sysman='/usr/man/man1'
tail=''
tar=''
tbl=''
test='test'
timeincl='/usr/include/sys/time.h '
timetype='time_t'
touch='touch'
tr='tr'
troff=''
uidtype='uid_t'
uname='uname'
uniq='uniq'
usedl='define'
usemymalloc='n'
usenm='false'
useopcode='true'
useperlio='undef'
useposix='true'
usesfio='false'
useshrplib='false'
usevfork='false'
usrinc='/usr/include'
uuname=''
vi=''
voidflags='15'
xlibpth='/usr/lib/386 /lib/386'
zcat=''
zip='zip'
!END!

my $summary = <<'!END!';
Summary of my $package ($baserev patchlevel $PATCHLEVEL subversion $SUBVERSION) configuration:
  Platform:
    osname=$osname, osvers=$osvers, archname=$archname
    uname='$myuname'
    hint=$hint, useposix=$useposix, d_sigaction=$d_sigaction
    bincompat3=$bincompat3 useperlio=$useperlio d_sfio=$d_sfio
  Compiler:
    cc='$cc', optimize='$optimize', gccversion=$gccversion
    cppflags='$cppflags'
    ccflags ='$ccflags'
    stdchar='$stdchar', d_stdstdio=$d_stdstdio, usevfork=$usevfork
    voidflags=$voidflags, castflags=$castflags, d_casti32=$d_casti32, d_castneg=$d_castneg
    intsize=$intsize, alignbytes=$alignbytes, usemymalloc=$usemymalloc, prototype=$prototype
  Linker and Libraries:
    ld='$ld', ldflags ='$ldflags'
    libpth=$libpth
    libs=$libs
    libc=$libc, so=$so
    useshrplib=$useshrplib, libperl=$libperl
  Dynamic Linking:
    dlsrc=$dlsrc, dlext=$dlext, d_dlsymun=$d_dlsymun, ccdlflags='$ccdlflags'
    cccdlflags='$cccdlflags', lddlflags='$lddlflags'

!END!
my $summary_expanded = 0;

sub myconfig {
	return $summary if $summary_expanded;
	$summary =~ s{\$(\w+)}
		     { my $c = $Config{$1}; defined($c) ? $c : 'undef' }ge;
	$summary_expanded = 1;
	$summary;
}

sub FETCH { 
    # check for cached value (which may be undef so we use exists not defined)
    return $_[0]->{$_[1]} if (exists $_[0]->{$_[1]});

    # Search for it in the big string 
    my($value, $start, $marker);
    $marker = "$_[1]='";
    # return undef unless (($value) = $config_sh =~ m/^$_[1]='(.*)'\s*$/m);
    $start = index($config_sh, "\n$marker");
    return undef if ( ($start == -1) &&  # in case it's first 
        (substr($config_sh, 0, length($marker)) ne $marker) );
    if ($start == -1) { $start = length($marker) } 
        else { $start += length($marker) + 1 }
    $value = substr($config_sh, $start, 
        index($config_sh, qq('\n), $start) - $start);
 
    $value = undef if $value eq 'undef'; # So we can say "if $Config{'foo'}".
    $_[0]->{$_[1]} = $value; # cache it
    return $value;
}
 
my $prevpos = 0;

sub FIRSTKEY {
    $prevpos = 0;
    # my($key) = $config_sh =~ m/^(.*?)=/;
    substr($config_sh, 0, index($config_sh, '=') );
    # $key;
}

sub NEXTKEY {
    my $pos = index($config_sh, qq('\n), $prevpos) + 2;
    my $len = index($config_sh, "=", $pos) - $pos;
    $prevpos = $pos;
    $len > 0 ? substr($config_sh, $pos, $len) : undef;
}

sub EXISTS { 
    # exists($_[0]->{$_[1]})  or  $config_sh =~ m/^$_[1]=/m;
    exists($_[0]->{$_[1]}) or
    index($config_sh, "\n$_[1]='") != -1 or
    substr($config_sh, 0, length($_[1])+2) eq "$_[1]='";
}

sub STORE  { die "\%Config::Config is read-only\n" }
sub DELETE { &STORE }
sub CLEAR  { &STORE }


sub config_sh {
    $config_sh
}

sub config_re {
    my $re = shift;
    my @matches = ($config_sh =~ /^$re=.*\n/mg);
    @matches ? (print @matches) : print "$re: not found\n";
}

sub config_vars {
    foreach(@_){
	config_re($_), next if /\W/;
	my $v=(exists $Config{$_}) ? $Config{$_} : 'UNKNOWN';
	$v='undef' unless defined $v;
	print "$_='$v';\n";
    }
}

sub TIEHASH { bless {} }

# avoid Config..Exporter..UNIVERSAL search for DESTROY then AUTOLOAD
sub DESTROY { }

tie %Config, 'Config';

1;
__END__

=head1 NAME

Config - access Perl configuration information

=head1 SYNOPSIS

    use Config;
    if ($Config{'cc'} =~ /gcc/) {
	print "built by gcc\n";
    } 

    use Config qw(myconfig config_sh config_vars);

    print myconfig();

    print config_sh();

    config_vars(qw(osname archname));


=head1 DESCRIPTION

The Config module contains all the information that was available to
the C<Configure> program at Perl build time (over 900 values).

Shell variables from the F<config.sh> file (written by Configure) are
stored in the readonly-variable C<%Config>, indexed by their names.

Values stored in config.sh as 'undef' are returned as undefined
values.  The perl C<exists> function can be used to check if a
named variable exists.

=over 4

=item myconfig()

Returns a textual summary of the major perl configuration values.
See also C<-V> in L<perlrun/Switches>.

=item config_sh()

Returns the entire perl configuration information in the form of the
original config.sh shell variable assignment script.

=item config_vars(@names)

Prints to STDOUT the values of the named configuration variable. Each is
printed on a separate line in the form:

  name='value';

Names which are unknown are output as C<name='UNKNOWN';>.
See also C<-V:name> in L<perlrun/Switches>.

=back

=head1 EXAMPLE

Here's a more sophisticated example of using %Config:

    use Config;
    use strict;

    my %sig_num;
    my @sig_name;
    unless($Config{sig_name} && $Config{sig_num}) {
	die "No sigs?";
    } else {
	my @names = split ' ', $Config{sig_name};
	@sig_num{@names} = split ' ', $Config{sig_num};
	foreach (@names) {
	    $sig_name[$sig_num{$_}] ||= $_;
	}   
    }

    print "signal #17 = $sig_name[17]\n";
    if ($sig_num{ALRM}) { 
	print "SIGALRM is $sig_num{ALRM}\n";
    }   

=head1 WARNING

Because this information is not stored within the perl executable
itself it is possible (but unlikely) that the information does not
relate to the actual perl binary which is being used to access it.

The Config module is installed into the architecture and version
specific library directory ($Config{installarchlib}) and it checks the
perl version number when loaded.

=head1 NOTE

This module contains a good example of how to use tie to implement a
cache and an example of how to make a tied variable readonly to those
outside of it.

=cut

