[Man-db-devel] Segmentation fault while 'man -D?'

[Jiri Kucera]

Hello,

when running man with -D? flags, segmentation fault occurs.

This is caused by assigning NULL to html_pager by -D flag (src/man.c:372)
and then doing *NULL at src/main.c:585 while processing -? flag.

man version: 2.7.6.1

Proposed patch:

--- ./src/man.c 2018-01-16 09:22:23.377563174 +0100
+++ ./src/man.c 2018-01-16 09:43:49.910228834 +0100
@@ -582,6 +582,11 @@
 # ifdef TROFF_IS_GROFF
                case 'H':
                        browser = html_pager;
+                       if (!browser) {
+                               browser = getenv ("BROWSER");
+                               if (!browser)
+                                       browser = WEB_BROWSER;
+                       }
                        if (STRNEQ (browser, "exec ", 5))
                                browser += 5;
                        return xasprintf (text, browser);

Regards
Jirka