X-Git-Url: https://git.proxmox.com/?p=pve-common.git;a=blobdiff_plain;f=src%2FPVE%2FTools.pm;h=ff01ebd88ca74db036db5dc70725b49236332fce;hp=189b55264ea8796728798c255ccc0cebf79c0998;hb=4c28a8bc6954e8783b14b0a01d8a7cb73830754a;hpb=243c4e5892e34d902ff6e9e65d01e8912430dea1

diff --git a/src/PVE/Tools.pm b/src/PVE/Tools.pm
index 189b552..ff01ebd 100644
--- a/src/PVE/Tools.pm
+++ b/src/PVE/Tools.pm
@@ -1384,6 +1384,11 @@ sub parse_host_and_port {
     return; # nothing
 }
 
+sub setresuid($$$) {
+    my ($ruid, $euid, $suid) = @_;
+    return 0 == syscall(PVE::Syscall::setresuid, $ruid, $euid, $suid);
+}
+
 sub unshare($) {
     my ($flags) = @_;
     return 0 == syscall(PVE::Syscall::unshare, $flags);
@@ -1644,4 +1649,34 @@ sub dev_t_minor($) {
     return (($dev_t >> 12) & 0xfff00) | ($dev_t & 0xff);
 }
 
+# Given an array of array refs [ \[a b c], \[a b b], \[e b a] ]
+# Returns the intersection of elements as a single array [a b]
+sub array_intersect {
+    my ($arrays) = @_;
+
+    return [] if @$arrays == 0;
+    return $arrays->[0] if @$arrays == 1;
+
+    my $array_unique = sub {
+	my %seen = ();
+	return grep { ! $seen{ $_ }++ } @_;
+    };
+
+    my $return_arr;
+    @$return_arr = $array_unique->(@{$arrays->[0]});
+    for my $i (1 .. $#$arrays) {
+	my %count = ();
+	foreach my $element (@$return_arr, $array_unique->(@{$arrays->[$i]})) {
+	    $count{$element}++;
+	}
+	$return_arr = [];
+	foreach my $element (keys %count) {
+	    push @$return_arr, $element if $count{$element} > 1;
+	}
+    }
+
+    return $return_arr;
+}
+
+
 1;