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PC World 2000 February
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PCWorld_2000-02_cd.bin
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live
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usr
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lib
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dpkg
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controllib.pl
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1999-03-02
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7KB
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233 lines
$parsechangelog= 'dpkg-parsechangelog';
grep($capit{lc $_}=$_, qw(Pre-Depends Standards-Version Installed-Size));
$substvar{'Format'}= 1.5;
$substvar{'Newline'}= "\n";
$substvar{'Space'}= " ";
$substvar{'Tab'}= "\t";
$maxsubsts=50;
$progname= $0; $progname= $& if $progname =~ m,[^/]+$,;
$getlogin = getlogin();
if(!defined($getlogin)) {
open(SAVEIN, "<&STDIN");
close(STDIN);
open(STDIN, "<&STDERR");
$getlogin = getlogin();
close(STDIN);
open(STDIN, "<&SAVEIN");
close(SAVEIN);
}
if(!defined($getlogin)) {
open(SAVEIN, "<&STDIN");
close(STDIN);
open(STDIN, "<&STDOUT");
$getlogin = getlogin();
close(STDIN);
open(STDIN, "<&SAVEIN");
close(SAVEIN);
}
if (defined ($ENV{'LOGNAME'})) {
if (!defined ($getlogin)) {
warn (sprintf ('no utmp entry available, using value of LOGNAME ("%s")', $ENV{'LOGNAME'}));
} else {
if ($getlogin ne $ENV{'LOGNAME'}) {
warn (sprintf ('utmp entry ("%s") does not match value of LOGNAME ("%s"); using "%s"',
$getlogin, $ENV{'LOGNAME'}, $ENV{'LOGNAME'}));
}
}
@fowner = getpwnam ($ENV{'LOGNAME'});
if (! @fowner) { die (sprintf ('unable to get login information for username "%s"', $ENV{'LOGNAME'})); }
} elsif (defined ($getlogin)) {
@fowner = getpwnam ($getlogin);
if (! @fowner) { die (sprintf ('unable to get login information for username "%s"', $getlogin)); }
} else {
warn (sprintf ('no utmp entry available and LOGNAME not defined; using uid of process (%d)', $<));
@fowner = getpwuid ($<);
if (! @fowner) { die (sprintf ('unable to get login information for uid %d', $<)); }
}
@fowner = @fowner[2,3];
sub capit {
return defined($capit{lc $_[0]}) ? $capit{lc $_[0]} :
(uc substr($_[0],0,1)).(lc substr($_[0],1));
}
sub findarch {
$arch=`dpkg --print-architecture`;
$? && &subprocerr("dpkg --print-architecture");
$arch =~ s/\n$//;
$substvar{'Arch'}= $arch;
}
sub substvars {
my ($v) = @_;
my ($lhs,$vn,$rhs,$count);
$count=0;
while ($v =~ m/\$\{([-:0-9a-z]+)\}/i) {
$count < $maxsubsts ||
&error("too many substitutions - recursive ? - in \`$v'");
$lhs=$`; $vn=$1; $rhs=$';
if (defined($substvar{$vn})) {
$v= $lhs.$substvar{$vn}.$rhs;
$count++;
} else {
&warn("unknown substitution variable \${$vn}");
$v= $lhs.$rhs;
}
}
return $v;
}
sub outputclose {
my ($dosubstvars) = @_;
for $f (keys %f) { $substvar{"F:$f"}= $f{$f}; }
if (length($varlistfile) and $dosubstvars) {
$varlistfile="./$varlistfile" if $varlistfile =~ m/\s/;
if (open(SV,"< $varlistfile")) {
while (<SV>) {
next if m/^\#/ || !m/\S/;
s/\s*\n$//;
m/^(\w[-:0-9A-Za-z]*)\=/ ||
&error("bad line in substvars file $varlistfile at line $.");
$substvar{$1}= $';
}
close(SV);
} elsif ($! != ENOENT ) {
&error("unable to open substvars file $varlistfile: $!");
}
}
for $f (sort { $fieldimps{$b} <=> $fieldimps{$a} } keys %f) {
$v= $f{$f};
if ($dosubstvars) {
$v= &substvars($v);
}
$v =~ m/\S/ || next; # delete whitespace-only fields
$v =~ m/\n\S/ && &internerr("field $f has newline then non whitespace >$v<");
$v =~ m/\n[ \t]*\n/ && &internerr("field $f has blank lines >$v<");
$v =~ m/\n$/ && &internerr("field $f has trailing newline >$v<");
$v =~ s/\$\{\}/\$/g;
print("$f: $v\n") || &syserr("write error on control data");
}
close(STDOUT) || &syserr("write error on close control data");
}
sub parsecontrolfile {
$controlfile="./$controlfile" if $controlfile =~ m/^\s/;
open(CDATA,"< $controlfile") || &error("cannot read control file $controlfile: $!");
$indices= &parsecdata('C',1,"control file $controlfile");
$indices >= 2 || &error("control file must have at least one binary package part");
for ($i=1;$i<$indices;$i++) {
defined($fi{"C$i Package"}) ||
&error("per-package paragraph $i in control info file is ".
"missing Package line");
}
}
sub parsechangelog {
defined($c=open(CDATA,"-|")) || &syserr("fork for parse changelog");
if (!$c) {
@al=($parsechangelog);
push(@al,"-F$changelogformat") if length($changelogformat);
push(@al,"-v$since") if length($since);
push(@al,"-l$changelogfile");
exec(@al) || &syserr("exec parsechangelog $parsechangelog");
}
&parsecdata('L',0,"parsed version of changelog");
close(CDATA); $? && &subprocerr("parse changelog");
$substvar{'Source-Version'}= $fi{"L Version"};
}
sub setsourcepackage {
if (length($sourcepackage)) {
$v eq $sourcepackage ||
&error("source package has two conflicting values - $sourcepackage and $v");
} else {
$sourcepackage= $v;
}
}
sub parsecdata {
local ($source,$many,$whatmsg) = @_;
# many=0: ordinary control data like output from dpkg-parsechangelog
# many=1: many paragraphs like in source control file
# many=-1: single paragraph of control data optionally signed
local ($index,$cf);
$index=''; $cf='';
while (<CDATA>) {
s/\s*\n$//;
if (m/^(\S+)\s*:\s*(.*)$/) {
$cf=$1; $v=$2;
$cf= &capit($cf);
$fi{"$source$index $cf"}= $v;
if (lc $cf eq 'package') { $p2i{"$source $v"}= $index; }
} elsif (m/^\s+\S/) {
length($cf) || &syntax("continued value line not in field");
$fi{"$source$index $cf"}.= "\n$_";
} elsif (m/^-----BEGIN PGP/ && $many<0) {
while (<CDATA>) { last if m/^$/; }
$many= -2;
} elsif (m/^$/) {
if ($many>0) {
$index++; $cf='';
} elsif ($many == -2) {
$_= <CDATA>;
length($_) ||
&syntax("expected PGP signature, found EOF after blank line");
s/\n$//;
m/^-----BEGIN PGP/ ||
&syntax("expected PGP signature, found something else \`$_'");
$many= -3; last;
} else {
&syntax("found several \`paragraphs' where only one expected");
}
} else {
&syntax("line with unknown format (not field-colon-value)");
}
}
$many == -2 && &syntax("found start of PGP body but no signature");
if (length($cf)) { $index++; }
$index || &syntax("empty file");
return $index;
}
sub unknown {
&warn("unknown information field $_ in input data in $_[0]");
}
sub syntax {
&error("syntax error in $whatmsg at line $.: $_[0]");
}
sub failure { die "$progname: failure: $_[0]\n"; }
sub syserr { die "$progname: failure: $_[0]: $!\n"; }
sub error { die "$progname: error: $_[0]\n"; }
sub internerr { die "$progname: internal error: $_[0]\n"; }
sub warn { warn "$progname: warning: $_[0]\n"; }
sub usageerr { print(STDERR "$progname: @_\n\n"); &usageversion; exit(2); }
sub subprocerr {
local ($p) = @_;
if (WIFEXITED($?)) {
die "$progname: failure: $p gave error exit status ".WEXITSTATUS($?)."\n";
} elsif (WIFSIGNALED($?)) {
die "$progname: failure: $p died from signal ".WTERMSIG($?)."\n";
} else {
die "$progname: failure: $p failed with unknown exit code $?\n";
}
}
1;