[PATCH pmg-api v2 2/5] config: add log-tracker-base key

[Stoiko Ivanov <s.ivanov@proxmox.com>]

makes it possible to override the input-base parameter for
pmg-log-tracker - functionality there was added in:
9816d19 ("fix #3657: allow scanning a configurable rotated log series")

the option is restricted to root@pam, as suggested by Thomas, since
enabling other admin users to open arbitrary files on the system might
leak information, in case the parser in pmg-log-tracker matches
something unexpected. To err on the side of caution - restrict it to
root@pam, as we can always make it more liberal in the future, while
restricting it later could break some users workflows.

the pattern allows for a input-base with a maximal depth of 6
directories, which should cover all needs.

the default in the config is /var/log/syslog and will be explicitly
provided to pmg-log-tracker if nothing is set in pmg.conf

exposing the option in pmg.conf enables users to use a different
log location for the daily work.

Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
---
 src/PMG/Config.pm | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/PMG/Config.pm b/src/PMG/Config.pm
index f48c31dc..fbe2f3cb 100644
--- a/src/PMG/Config.pm
+++ b/src/PMG/Config.pm
@@ -161,6 +161,12 @@ EODESC
             maxLength => 64 * 1024,
             default => '',
         },
+        'log-tracker-base' => {
+            description => "Location of rotated mail logs, input-base argument for pmg-log-tracker",
+            type => 'string',
+            pattern => '^/([^/\0]+\/){0,6}[^/\0]+$',
+            default => '/var/log/syslog',
+        },
     };
 }
 
@@ -182,6 +188,7 @@ sub options {
         'dkim-use-domain' => { optional => 1 },
         'admin-mail-from' => { optional => 1 },
         'consent-text' => { optional => 1 },
+        'log-tracker-base' => { optional => 1, root_only => 1 },
     };
 }
 
-- 
2.47.3