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From 79308ac147be9e9c889798cba78bab2af05048e1 Mon Sep 17 00:00:00 2001
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From: Jiri Kucera <jkucera@redhat.com>
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Date: Wed, 17 Jan 2018 13:57:34 +0100
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Subject: [PATCH] Fix a segfault in 'man -D --help'
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This patch is an adjusted version (due to the patch rejected hunk issues) of its original (by Colin Watson) from: https://git.savannah.gnu.org/cgit/man-db.git/patch/?id=b32977ff73220cd351387abe558fb523d1deedbb
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Reported by Jiri Kucera.
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* src/man.c (init_html_pager): New function.
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(parse_opt): Call init_html_pager rather than setting html_pager to
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NULL.
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(help_filter): Assert that browser is non-NULL.
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(main): Call init_html_pager rather than doing the same thing directly.
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* NEWS: Document this.
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---
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NEWS | 10 ++++++++++
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src/man.c | 17 +++++++++++------
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2 files changed, 21 insertions(+), 6 deletions(-)
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diff --git a/NEWS b/NEWS
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index 366a0263..ff35e884 100644
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--- a/NEWS
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+++ b/NEWS
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@@ -1,3 +1,13 @@
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+man-db 2.7.7
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+============
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+
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+Major changes since man-db 2.7.6.1:
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+
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+ Fixes:
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+ ------
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+
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+ o Fix a segfault in 'man -D --help'.
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+
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man-db 2.7.6.1 (12 December 2016)
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=================================
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diff --git a/src/man.c b/src/man.c
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index 8b11f43e..cb0930b8 100644
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--- a/src/man.c
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+++ b/src/man.c
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@@ -345,6 +345,13 @@ static struct argp_option options[] = {
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{ 0 }
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};
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+static void init_html_pager (void)
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+{
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+ html_pager = getenv ("BROWSER");
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+ if (!html_pager)
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+ html_pager = WEB_BROWSER;
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+}
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+
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static error_t parse_opt (int key, char *arg, struct argp_state *state)
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{
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static int apropos, whatis; /* retain values between calls */
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@@ -369,7 +376,7 @@ static error_t parse_opt (int key, char *arg, struct argp_state *state)
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ditroff = 0;
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gxditview = NULL;
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htmlout = 0;
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- html_pager = NULL;
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+ init_html_pager ();
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#endif
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roff_device = want_encoding = extension = pager =
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locale = alt_system_name = external =
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@@ -582,6 +589,7 @@ static char *help_filter (int key, const char *text,
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# ifdef TROFF_IS_GROFF
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case 'H':
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browser = html_pager;
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+ assert (browser);
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if (STRNEQ (browser, "exec ", 5))
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browser += 5;
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return xasprintf (text, browser);
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@@ -4018,11 +4026,8 @@ int main (int argc, char *argv[])
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#ifdef TROFF_IS_GROFF
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/* used in --help, so initialise early */
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- if (!html_pager) {
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- html_pager = getenv ("BROWSER");
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- if (!html_pager)
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- html_pager = WEB_BROWSER;
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- }
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+ if (!html_pager)
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+ init_html_pager ();
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#endif /* TROFF_IS_GROFF */
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/* First of all, find out if $MANOPT is set. If so, put it in
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--
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2.14.3
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