Add support for zstd-compressed log files

- Resolves: RHEL-102044

logwatch.spec

@@ -2,11 +2,12 @@
 Summary: Analyzes and Reports on system logs
 Name: logwatch
 Version: 7.11
-Release: 2%{?dist}
+Release: 3%{?dist}
 License: MIT
 URL: https://sourceforge.net/projects/logwatch/
 Source0: https://sourceforge.net/projects/logwatch/files/%{name}-%{version}/%{name}-%{version}.tar.gz
 Patch0: sshd-sort-by-count.patch
+Patch1: zstd-log-support.patch
 BuildRequires: perl-generators
 Requires: grep
 Requires: perl(Date::Manip)
@@ -130,6 +131,10 @@ echo "# Configuration overrides for specific logfiles/services may be placed her
 %{_unitdir}/logwatch.timer
 
 %changelog
+* Tue Jul 15 2025 Pavel Simovec <psimovec@redhat.com> - 7.11-3
+- Add support for zstd-compressed log files
+- Resolves: RHEL-102044
+
 * Wed Nov 27 2024 Pavel Simovec <psimovec@redhat.com> - 7.11-2
 - sshd: sort IP adresses by report count
 - Resolves: RHEL-58995

zstd-log-support.patch

@@ -0,0 +1,41 @@
+diff --color -urN a/conf/logwatch.conf b/conf/logwatch.conf
+--- a/conf/logwatch.conf	2025-07-15 12:47:54.895159550 +0200
++++ b/conf/logwatch.conf	2025-07-15 16:35:29.127282999 +0200
+@@ -191,5 +191,6 @@
+ # PathTozcat = "zcat"
+ # PathTobzcat = "bzcat"
+ # PathToxzcat = "zxcat"
++# PathTozstdcat = "zstdcat"
+ 
+ # vi: shiftwidth=3 tabstop=3 et
+diff --color -urN a/scripts/logwatch.pl b/scripts/logwatch.pl
+--- a/scripts/logwatch.pl	2025-07-15 12:47:54.869744800 +0200
++++ b/scripts/logwatch.pl	2025-07-15 16:34:26.473278680 +0200
+@@ -96,6 +96,7 @@
+ $Config{'pathtozcat'} = "zcat";
+ $Config{'pathtobzcat'} = "bzcat";
+ $Config{'pathtoxzcat'} = "xzcat";
++$Config{'pathtozstdcat'} = "zstdcat";
+ $Config{'output'} = "stdout"; #8.0
+ $Config{'format'} = "text"; #8.0
+ $Config{'encode'} = "none"; #8.0
+@@ -746,7 +747,7 @@
+ 
+    # Handle compressed log files using the archive codepath
+    foreach my $lf (@{$LogFileData{$LogFile}{'logfiles'}}) {
+-      if ($lf =~ /\.(?:gz|bz2|xz)$/) {
++      if ($lf =~ /\.(?:gz|bz2|xz|zst)$/) {
+          push @{$LogFileData{$LogFile}{'archives'}}, $lf;
+       } else {
+          push @FileList, $lf;
+@@ -798,6 +799,10 @@
+             my $arguments = "'${Archive}' 2>/dev/null >> $DestFile";
+             system("$Config{'pathtoxzcat'} $arguments") == 0
+                or die "system '$Config{'pathtoxzcat'} $arguments' failed: $?"
++         } elsif (($Archive =~ m/zst$/) && (-f "$Archive") && (-s "$Archive")) {
++            my $arguments = "'${Archive}' 2>/dev/null >> $DestFile";
++            system("$Config{'pathtozstdcat'} $arguments") == 0
++               or die "system '$Config{'pathtozstdcat'} $arguments' failed: $?"
+          } elsif ((-f "$Archive") && (-s "$Archive")) {
+             my $arguments = "'${Archive}'  >> $DestFile";
+             system("$Config{'pathtocat'} $arguments") == 0