X-Git-Url: https://git.proxmox.com/?p=pve-common.git;a=blobdiff_plain;f=data%2FPVE%2FTools.pm;h=20fc1ea3ad0f73c1ee4f03b8d6b93586833b6e5b;hp=4f62cd7d2c137911a6241b33d605a09d357107c4;hb=a84b65c0da5eb1c1e3a3d4c51f01e24aa577253e;hpb=eb9e24df41de7c3c80ab0df8422f0b88b8c834de

diff --git a/data/PVE/Tools.pm b/data/PVE/Tools.pm
index 4f62cd7..20fc1ea 100644
--- a/data/PVE/Tools.pm
+++ b/data/PVE/Tools.pm
@@ -1,7 +1,7 @@
 package PVE::Tools;
 
 use strict;
-use POSIX;
+use POSIX qw(EINTR);
 use IO::Socket::INET;
 use IO::Select;
 use File::Basename;
@@ -92,7 +92,15 @@ sub lock_file {
 
         if (!flock ($lock_handles->{$$}->{$filename}, LOCK_EX|LOCK_NB)) {
             print STDERR "trying to aquire lock...";
-            if (!flock ($lock_handles->{$$}->{$filename}, LOCK_EX)) {
+	    my $success;
+	    while(1) {
+		$success = flock($lock_handles->{$$}->{$filename}, LOCK_EX);
+		# try again on EINTR (see bug #273)
+		if ($success || ($! != EINTR)) {
+		    last;
+		}
+	    }
+            if (!$success) {
                 print STDERR " failed\n";
                 die "can't aquire lock - $!\n";
             }
@@ -173,7 +181,7 @@ sub file_read_firstline {
     my $fh = IO::File->new ($filename, "r");
     return undef if !$fh;
     my $res = <$fh>;
-    chomp $res;
+    chomp $res if $res;
     $fh->close;
     return $res;
 }
@@ -207,7 +215,12 @@ sub run_command {
 
     if (!ref($cmd)) {
 	$cmdstr = $cmd;
-	$cmd = [ $cmd ];
+	if ($cmd =~ m/|/) {
+	    # see 'man bash' for option pipefail
+	    $cmd = [ '/bin/bash', '-c', "set -o pipefail && $cmd" ];
+	} else {
+	    $cmd = [ $cmd ];
+	}
     } else {
 	$cmdstr = cmd2string($cmd);
     }
@@ -223,6 +236,7 @@ sub run_command {
     my $logfunc;
     my $input;
     my $output;
+    my $afterfork;
 
     eval {
 
@@ -243,6 +257,8 @@ sub run_command {
 		$errfunc = $param{$p};
 	    } elsif ($p eq 'logfunc') {
 		$logfunc = $param{$p};
+	    } elsif ($p eq 'afterfork') {
+		$afterfork = $param{$p};
 	    } else {
 		die "got unknown parameter '$p' for run_command\n";
 	    }
@@ -303,6 +319,8 @@ sub run_command {
 	local $SIG{ALRM} = sub { die "got timeout\n"; } if $timeout;
 	$oldtimeout = alarm($timeout) if $timeout;
 
+	&$afterfork() if $afterfork;
+
 	if (ref($writer)) {
 	    print $writer $input if defined $input;
 	    close $writer;
@@ -580,6 +598,30 @@ sub extract_param {
     return $res;
 }
 
+# Note: we use this to wait until vncterm is ready
+sub wait_for_vnc_port {
+    my ($port, $timeout) = @_;
+
+    $timeout = 5 if !$timeout;
+
+    for (my $i = 0; $i < $timeout; $i++) {
+	if (my $fh = IO::File->new ("/proc/net/tcp", "r")) {
+	    while (defined (my $line = <$fh>)) {
+		if ($line =~ m/^\s*\d+:\s+([0-9A-Fa-f]{8}):([0-9A-Fa-f]{4})\s/) {
+		    if ($port == hex($2)) {
+			close($fh);
+			return 1;
+		    }
+		}
+	    }
+	    close($fh);
+	}
+	sleep(1);
+    }
+
+    return undef;
+}
+
 sub next_vnc_port {
 
     for (my $p = 5900; $p < 6000; $p++) {