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|
#! /usr/bin/perl
#
# Buildd.pm: library for buildd and friends
# Copyright © 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
# Copyright © 2005 Ryan Murray <rmurray@debian.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see
# <http://www.gnu.org/licenses/>.
#
#######################################################################
package Buildd;
use strict;
use warnings;
use POSIX;
use FileHandle;
use Sbuild::LogBase;
require Exporter;
@Buildd::ISA = qw(Exporter);
@Buildd::EXPORT = qw(unset_env lock_file unlock_file send_mail
ll_send_mail exitstatus isin);
$Buildd::lock_interval = 15;
$Buildd::max_lock_trys = 120;
($Buildd::progname = $0) =~ s,.*/,,;
my @pwinfo = getpwuid($>);
$Buildd::username = $pwinfo[0];
$Buildd::gecos = $pwinfo[6];
$Buildd::gecos =~ s/,.*$//;
$Buildd::hostname = `/bin/hostname -f`;
$Buildd::hostname =~ /^(\S+)$/;
$Buildd::hostname = $1; # untaint
sub isin ($@);
sub unset_env ();
sub lock_file ($;$);
sub unlock_file ($);
sub send_mail ($$$;$);
sub ll_send_mail ($$);
sub exitstatus ($);
sub isin ($@) {
my $val = shift;
return grep($_ eq $val, @_);
}
sub unset_env () {
# unset any locale variables (sorted to match output from locale(1))
delete $ENV{'LANG'};
delete $ENV{'LANGUAGE'};
delete $ENV{'LC_CTYPE'};
delete $ENV{'LC_NUMERIC'};
delete $ENV{'LC_TIME'};
delete $ENV{'LC_COLLATE'};
delete $ENV{'LC_MONETARY'};
delete $ENV{'LC_MESSAGES'};
delete $ENV{'LC_PAPER'};
delete $ENV{'LC_NAME'};
delete $ENV{'LC_ADDRESS'};
delete $ENV{'LC_TELEPHONE'};
delete $ENV{'LC_MEASUREMENT'};
delete $ENV{'LC_IDENTIFICATION'};
delete $ENV{'LC_ALL'};
# other unneeded variables that might be set
delete $ENV{'DISPLAY'};
delete $ENV{'TERM'};
delete $ENV{'XDG_RUNTIME_DIR'};
delete $ENV{'XDG_SEAT'};
delete $ENV{'XDG_SESSION_COOKIE'};
delete $ENV{'XDG_SESSION_ID'};
delete $ENV{'XDG_VTNR'};
}
sub lock_file ($;$) {
my $file = shift;
my $nowait = shift;
my $lockfile = "$file.lock";
my $try = 0;
my $username = (getpwuid($<))[0] || $ENV{'LOGNAME'} || $ENV{'USER'};
if (!defined($nowait)) {
$nowait = 0;
}
repeat:
if (!sysopen(F, $lockfile, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0644)) {
if ($! == EEXIST) {
# lock file exists, wait
goto repeat if !open(F, "<$lockfile");
my $line = <F>;
close(F);
# If this goes wrong it would be a spinlock and the world will
# end.
goto repeat if !defined($line);
if ($line !~ /^(\d+)\s+([\w\d.-]+)$/) {
warn "Bad lock file contents ($lockfile) -- still trying\n";
} else {
my ($pid, $user) = ($1, $2);
my $cnt = kill(0, $pid);
if ($cnt == 0 && $! == ESRCH) {
# process doesn't exist anymore, remove stale lock
warn "Removing stale lock file $lockfile "
. " (pid $pid, user $user)\n";
unlink($lockfile);
goto repeat;
} elsif ($cnt >= 1 and $nowait == 1) {
# process exists.
return 0;
}
}
if (++$try > $Buildd::max_lock_trys) {
warn "Lockfile $lockfile still present after "
. "$Buildd::max_lock_trys * $Buildd::lock_interval "
. " seconds -- giving up\n";
return 0;
}
sleep $Buildd::lock_interval;
goto repeat;
}
die "$Buildd::progname: Can't create lock file $lockfile: $!\n";
}
F->print("$$ $username\n");
F->close();
return 1;
}
sub unlock_file ($) {
my $file = shift;
my $lockfile = "$file.lock";
unlink($lockfile);
}
sub send_mail ($$$;$) {
my $addr = shift;
my $subject = shift;
my $text = shift;
my $add_headers = shift;
return ll_send_mail($addr,
"To: $addr\n"
. "Subject: $subject\n"
. "From: $Buildd::gecos "
. "<$Buildd::username\@$Buildd::hostname>\n"
. ($add_headers ? $add_headers : "")
. "\n$text\n");
}
sub ll_send_mail ($$) {
my $to = shift;
my $text = shift;
local (*MAIL);
# TODO: Don't log to STDERR: Implement as class method using
# standard pipe interface using normal log streams.
$text =~ s/^\.$/../mg;
local $SIG{'PIPE'} = 'IGNORE';
if (!open(MAIL, "|/usr/sbin/sendmail -oem '$to'")) {
print STDERR "Could not open pipe to /usr/sbin/sendmail: $!\n";
return 0;
}
print MAIL $text;
if (!close(MAIL)) {
print STDERR "sendmail failed (exit status ", exitstatus($?), ")\n";
return 0;
}
return 1;
}
sub exitstatus ($) {
my $stat = shift;
return ($stat >> 8) . "/" . ($stat % 256);
}
1;
|
