Avoid usage of PATH_MAX.

Submitted to bug-less@gnu.org.

From ef652341ed8b2c14ac40312ccd4ed329cb69fd0c Mon Sep 17 00:00:00 2001
From: Jan Nieuwenhuizen <janneke@gnu.org>
Date: Sat, 7 Mar 2020 14:57:19 +0100
Subject: [PATCH] Avoid usage of PATH_MAX.

* filename.c (lrealpath): Have realpath allocate the buffer.  Fixes
compilation on the Hurd and avoids possible buffer overflow on other
systems.
---
 filename.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/filename.c b/filename.c
index e420837..faa71b0 100644
--- a/filename.c
+++ b/filename.c
@@ -795,9 +795,9 @@ lrealpath(path)
 	char *path;
 {
 #if HAVE_REALPATH
-	char rpath[PATH_MAX];
-	if (realpath(path, rpath) != NULL)
-		return (save(rpath));
+	char *rpath = NULL;
+	if ((rpath = realpath(path, rpath)) != NULL)
+		return (rpath);
 #endif
 	return (save(path));
 }
-- 
2.24.0

='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=e5140eebdfc04b90c046856d95b2ef50c12fee72'>refs</a><a class='active' href='/guix/log/nix/libstore/globals.cc?showmsg=1'>log</a><a href='/guix/tree/nix/libstore/globals.cc?id=e5140eebdfc04b90c046856d95b2ef50c12fee72'>tree</a><a href='/guix/commit/nix/libstore/globals.cc?id=e5140eebdfc04b90c046856d95b2ef50c12fee72'>commit</a><a href='/guix/diff/nix/libstore/globals.cc?id=e5140eebdfc04b90c046856d95b2ef50c12fee72'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/nix/libstore/globals.cc'>
<input type='hidden' name='id' value='e5140eebdfc04b90c046856d95b2ef50c12fee72'/><input type='hidden' name='showmsg' value='1'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=e5140eebdfc04b90c046856d95b2ef50c12fee72&amp;showmsg=1'>root</a>/<a href='/guix/log/nix?id=e5140eebdfc04b90c046856d95b2ef50c12fee72&amp;showmsg=1'>nix</a>/<a href='/guix/log/nix/libstore?id=e5140eebdfc04b90c046856d95b2ef50c12fee72&amp;showmsg=1'>libstore</a>/<a href='/guix/log/nix/libstore/globals.cc?id=e5140eebdfc04b90c046856d95b2ef50c12fee72&amp;showmsg=1'>globals.cc</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/nix/libstore/globals.cc?id=e5140eebdfc04b90c046856d95b2ef50c12fee72'>Collapse</a>)</th><th class='left'>Author</th></tr>
<tr class='logheader'><td><span title='2024-01-05 17:27:21 +0100'>2024-01-05</span></td><td class='logsubject'><a href='/guix/commit/nix/libstore/globals.cc?id=d5724111ea2a8f5312b47fe9aae2bc74278c127e'>daemon: Change default ‘timeout’ and ‘max-silent-time’ values.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
Having a timeout seems generally preferable as it makes sure build slots
are not kept busy for no good reason (few package builds, if any, are
expected to exceed these values).

* nix/libstore/globals.cc (Settings::Settings): Change ‘maxSilentTime’
and ‘buildTimeout’.
* gnu/services/base.scm (&lt;guix-configuration&gt;)[max-silent-time]
[timeout]: Change default values.
* doc/guix.texi (Invoking guix-daemon, Base Services): Adjust
accordingly.

Change-Id: I25c50893f3f7fcca451b8f093d9d4d1a15fa58d8


</td></tr>
<tr class='logheader'><td><span title='2022-01-18 18:46:51 +0100'>2022-01-18</span></td><td class='logsubject'><a href='/guix/commit/nix/libstore/globals.cc?id=575e52ac2b090fd194086e9c1c53bbf8055acbc2'>daemon: Always default to gzip for log compression.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* nix/libstore/globals.cc (Settings::Settings): Have 'logCompression'
default to COMPRESSION_GZIP unconditionally.
* gnu/services/base.scm (&lt;guix-configuration&gt;)[log-compression]: Default
to 'gzip.
* doc/guix.texi (Invoking guix-daemon, Base Services): Adjust accordingly.


</td></tr>