use IO::Select;
use File::Basename;
use File::Path qw(make_path);
+use Filesys::Df (); # don't overwrite our df()
+use IO::Pipe;
use IO::File;
use IO::Dir;
use IPC::Open3;
use Digest::SHA;
use Text::ParseWords;
use String::ShellQuote;
-use Time::HiRes qw(usleep gettimeofday tv_interval);
+use Time::HiRes qw(usleep gettimeofday tv_interval alarm);
# avoid warning when parsing long hex values with hex()
no warnings 'portable'; # Support for 64-bit ints required
safe_print
trim
extract_param
+file_copy
);
my $pvelogdir = "/var/log/pve";
mkdir $pvelogdir;
mkdir $pvetaskdir;
-my $IPV4OCTET = "(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])";
+my $IPV4OCTET = "(?:25[0-5]|(?:2[0-4]|1[0-9]|[1-9])?[0-9])";
our $IPV4RE = "(?:(?:$IPV4OCTET\\.){3}$IPV4OCTET)";
my $IPV6H16 = "(?:[0-9a-fA-F]{1,4})";
my $IPV6LS32 = "(?:(?:$IPV4RE|$IPV6H16:$IPV6H16))";
"(?:(?:(?:(?:$IPV6H16:){0,5}$IPV6H16)?::" . ")$IPV6H16)|" .
"(?:(?:(?:(?:$IPV6H16:){0,6}$IPV6H16)?::" . ")))";
+our $IPRE = "(?:$IPV4RE|$IPV6RE)";
+
+use constant {CLONE_NEWNS => 0x00020000,
+ CLONE_NEWUTS => 0x04000000,
+ CLONE_NEWIPC => 0x08000000,
+ CLONE_NEWUSER => 0x10000000,
+ CLONE_NEWPID => 0x20000000,
+ CLONE_NEWNET => 0x40000000};
+
+use constant O_PATH => 0x10000000;
+
sub run_with_timeout {
my ($timeout, $code, @param) = @_;
die "got timeout\n" if $timeout <= 0;
- my $prev_alarm;
+ my $prev_alarm = alarm 0; # suspend outer alarm early
my $sigcount = 0;
my $res;
- local $SIG{ALRM} = sub { $sigcount++; }; # catch alarm outside eval
-
eval {
local $SIG{ALRM} = sub { $sigcount++; die "got timeout\n"; };
local $SIG{PIPE} = sub { $sigcount++; die "broken pipe\n" };
local $SIG{__DIE__}; # see SA bug 4631
- $prev_alarm = alarm($timeout);
+ alarm($timeout);
- $res = &$code(@param);
+ eval { $res = &$code(@param); };
alarm(0); # avoid race conditions
+
+ die $@ if $@;
};
my $err = $@;
- alarm($prev_alarm) if defined($prev_alarm);
+ alarm $prev_alarm;
+ # this shouldn't happen anymore?
die "unknown error" if $sigcount && !$err; # seems to happen sometimes
die $err if $err;
my $lock_func = sub {
if (!$lock_handles->{$$}->{$filename}) {
- $lock_handles->{$$}->{$filename} = new IO::File (">>$filename") ||
- die "can't open file - $!\n";
+ my $fh = new IO::File(">>$filename") ||
+ die "can't open file - $!\n";
+ $lock_handles->{$$}->{$filename} = { fh => $fh, refcount => 0};
}
- if (!flock ($lock_handles->{$$}->{$filename}, $mode|LOCK_NB)) {
- print STDERR "trying to aquire lock...";
+ if (!flock($lock_handles->{$$}->{$filename}->{fh}, $mode|LOCK_NB)) {
+ print STDERR "trying to acquire lock...";
my $success;
while(1) {
- $success = flock($lock_handles->{$$}->{$filename}, $mode);
+ $success = flock($lock_handles->{$$}->{$filename}->{fh}, $mode);
# try again on EINTR (see bug #273)
if ($success || ($! != EINTR)) {
last;
}
if (!$success) {
print STDERR " failed\n";
- die "can't aquire lock - $!\n";
+ die "can't acquire lock '$filename' - $!\n";
}
print STDERR " OK\n";
}
+ $lock_handles->{$$}->{$filename}->{refcount}++;
};
my $res;
$err = $@;
}
- if (my $fh = $lock_handles->{$$}->{$filename}) {
- $lock_handles->{$$}->{$filename} = undef;
- close ($fh);
+ if (my $fh = $lock_handles->{$$}->{$filename}->{fh}) {
+ my $refcount = --$lock_handles->{$$}->{$filename}->{refcount};
+ if ($refcount <= 0) {
+ $lock_handles->{$$}->{$filename} = undef;
+ close ($fh);
+ }
}
if ($err) {
return $content;
}
+sub file_copy {
+ my ($filename, $dst, $max, $perm) = @_;
+
+ file_set_contents ($dst, file_get_contents($filename, $max), $perm);
+}
+
sub file_read_firstline {
my ($filename) = @_;
return $input;
}
+# The $cmd parameter can be:
+# -) a string
+# This is generally executed by passing it to the shell with the -c option.
+# However, it can be executed in one of two ways, depending on whether
+# there's a pipe involved:
+# *) with pipe: passed explicitly to bash -c, prefixed with:
+# set -o pipefail &&
+# *) without a pipe: passed to perl's open3 which uses 'sh -c'
+# (Note that this may result in two different syntax requirements!)
+# FIXME?
+# -) an array of arguments (strings)
+# Will be executed without interference from a shell. (Parameters are passed
+# as is, no escape sequences of strings will be touched.)
+# -) an array of arrays
+# Each array represents a command, and each command's output is piped into
+# the following command's standard input.
+# For this a shell command string is created with pipe symbols between each
+# command.
+# Each command is a list of strings meant to end up in the final command
+# unchanged. In order to achieve this, every argument is shell-quoted.
+# Quoting can be disabled for a particular argument by turning it into a
+# reference, this allows inserting arbitrary shell options.
+# For instance: the $cmd [ [ 'echo', 'hello', \'>/dev/null' ] ] will not
+# produce any output, while the $cmd [ [ 'echo', 'hello', '>/dev/null' ] ]
+# will literally print: hello >/dev/null
sub run_command {
my ($cmd, %param) = @_;
my $old_umask;
my $cmdstr;
- if (!ref($cmd)) {
+ if (my $ref = ref($cmd)) {
+ if (ref($cmd->[0])) {
+ $cmdstr = 'set -o pipefail && ';
+ my $pipe = '';
+ foreach my $command (@$cmd) {
+ # concatenate quoted parameters
+ # strings which are passed by reference are NOT shell quoted
+ $cmdstr .= $pipe . join(' ', map { ref($_) ? $$_ : shellquote($_) } @$command);
+ $pipe = ' | ';
+ }
+ $cmd = [ '/bin/bash', '-c', "set -o pipefail && $cmdstr" ];
+ } else {
+ $cmdstr = cmd2string($cmd);
+ }
+ } else {
$cmdstr = $cmd;
if ($cmd =~ m/\|/) {
# see 'man bash' for option pipefail
} else {
$cmd = [ $cmd ];
}
- } else {
- $cmdstr = cmd2string($cmd);
}
my $errmsg;
my $timeout;
my $oldtimeout;
my $pid;
+ my $exitcode;
my $outfunc;
my $errfunc;
my $input;
my $output;
my $afterfork;
+ my $noerr;
eval {
$logfunc = $param{$p};
} elsif ($p eq 'afterfork') {
$afterfork = $param{$p};
+ } elsif ($p eq 'noerr') {
+ $noerr = $param{$p};
} else {
die "got unknown parameter '$p' for run_command\n";
}
die "failed to execute\n";
} elsif (my $sig = ($? & 127)) {
die "got signal $sig\n";
- } elsif (my $ec = ($? >> 8)) {
- if (!($ec == 24 && ($cmdstr =~ m|^(\S+/)?rsync\s|))) {
+ } elsif ($exitcode = ($? >> 8)) {
+ if (!($exitcode == 24 && ($cmdstr =~ m|^(\S+/)?rsync\s|))) {
if ($errmsg && $laststderr) {
my $lerr = $laststderr;
$laststderr = undef;
die "$lerr\n";
}
- die "exit code $ec\n";
+ die "exit code $exitcode\n";
}
}
if ($errmsg) {
$err =~ s/^usermod:\s*// if $cmdstr =~ m|^(\S+/)?usermod\s|;
die "$errmsg: $err";
- } else {
+ } elsif(!$noerr) {
die "command '$cmdstr' failed: $err";
}
}
- return undef;
+ return $exitcode;
}
sub split_list {
# NOTE: NFS syscall can't be interrupted, so alarm does
# not work to provide timeouts.
# from 'man nfs': "Only SIGKILL can interrupt a pending NFS operation"
-# So the spawn external 'df' process instead of using
-# Filesys::Df (which uses statfs syscall)
+# So fork() before using Filesys::Df
sub df {
my ($path, $timeout) = @_;
- my $cmd = [ 'df', '-P', '-B', '1', $path];
-
my $res = {
total => 0,
used => 0,
avail => 0,
};
- my $parser = sub {
- my $line = shift;
- if (my ($fsid, $total, $used, $avail) = $line =~
- m/^(\S+.*)\s+(\d+)\s+(\d+)\s+(\d+)\s+\d+%\s.*$/) {
- $res = {
- total => $total,
- used => $used,
- avail => $avail,
- };
+ my $pipe = IO::Pipe->new();
+ my $child = fork();
+ if (!defined($child)) {
+ warn "fork failed: $!\n";
+ return $res;
+ }
+
+ if (!$child) {
+ $pipe->writer();
+ eval {
+ my $df = Filesys::Df::df($path, 1);
+ print {$pipe} "$df->{blocks}\n$df->{used}\n$df->{bavail}\n";
+ $pipe->close();
+ };
+ if (my $err = $@) {
+ warn $err;
+ POSIX::_exit(1);
}
+ POSIX::_exit(0);
+ }
+
+ $pipe->reader();
+
+ my $readvalues = sub {
+ $res->{total} = int(<$pipe>);
+ $res->{used} = int(<$pipe>);
+ $res->{avail} = int(<$pipe>);
+ };
+ eval {
+ run_with_timeout($timeout, $readvalues);
};
- eval { run_command($cmd, timeout => $timeout, outfunc => $parser); };
warn $@ if $@;
-
+ $pipe->close();
+ kill('KILL', $child);
+ waitpid($child, 0);
return $res;
}
my $rand = Digest::SHA::sha1_hex($$, rand(), $seconds, $microseconds);
- my $mac = '';
- for (my $i = 0; $i < 6; $i++) {
- my $ss = hex(substr($rand, $i*2, 2));
- if (!$i) {
- $ss &= 0xfe; # clear multicast
- $ss |= 2; # set local id
- }
- $ss = sprintf("%02X", $ss);
-
- if (!$i) {
- $mac .= "$ss";
- } else {
- $mac .= ":$ss";
- }
- }
+ # clear multicast, set local id
+ vec($rand, 0, 8) = (vec($rand, 0, 8) & 0xfe) | 2;
- return $mac;
+ return sprintf("%02X:%02X:%02X:%02X:%02X:%02X", unpack("C6", $rand));
}
sub shellquote {
return ($count, $lines);
}
+sub dump_journal {
+ my ($start, $limit, $since, $until) = @_;
+
+ my $lines = [];
+ my $count = 0;
+
+ $start = 0 if !$start;
+ $limit = 50 if !$limit;
+
+ my $parser = sub {
+ my $line = shift;
+
+ return if $count++ < $start;
+ return if $limit <= 0;
+ push @$lines, { n => int($count), t => $line};
+ $limit--;
+ };
+
+ my $cmd = ['journalctl', '-o', 'short', '--no-pager'];
+
+ push @$cmd, '--since', $since if $since;
+ push @$cmd, '--until', $until if $until;
+ run_command($cmd, outfunc => $parser);
+
+ # HACK: ExtJS store.guaranteeRange() does not like empty array
+ # so we add a line
+ if (!$count) {
+ $count++;
+ push @$lines, { n => $count, t => "no content"};
+ }
+
+ return ($count, $lines);
+}
+
sub dir_glob_regex {
my ($dir, $regex) = @_;
return $res[0]->{family};
}
+# Parses any sane kind of host, or host+port pair:
+# The port is always optional and thus may be undef.
+sub parse_host_and_port {
+ my ($address) = @_;
+ if ($address =~ /^($IPV4RE|[[:alnum:]\-.]+)(?::(\d+))?$/ || # ipv4 or host with optional ':port'
+ $address =~ /^\[($IPV6RE|$IPV4RE|[[:alnum:]\-.]+)\](?::(\d+))?$/ || # anything in brackets with optional ':port'
+ $address =~ /^($IPV6RE)(?:\.(\d+))?$/) # ipv6 with optional port separated by dot
+ {
+ return ($1, $2, 1); # end with 1 to support simple if(parse...) tests
+ }
+ return; # nothing
+}
+
+sub unshare($) {
+ my ($flags) = @_;
+ return 0 == syscall(272, $flags);
+}
+
+sub setns($$) {
+ my ($fileno, $nstype) = @_;
+ return 0 == syscall(308, $fileno, $nstype);
+}
+
+sub syncfs($) {
+ my ($fileno) = @_;
+ return 0 == syscall(306, $fileno);
+}
+
+sub sync_mountpoint {
+ my ($path) = @_;
+ sysopen my $fd, $path, O_PATH or die "failed to open $path: $!\n";
+ my $result = syncfs(fileno($fd));
+ close($fd);
+ return $result;
+}
+
1;
projects / pve-common.git / blobdiff