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

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<tr><td><span title='2023-05-14 12:22:29 +0200'>2023-05-14</span></td><td><a href='/guix/commit/gnu/packages/irods.scm?id=58e84ec9afd11b21fae1a87e149902f965326239'>gnu: Rename json-modern-cxx to nlohmann-json.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/cpp.scm (nlohmann-json): New variable.
(json-modern-cxx): Mark as deprecated alias.
(xtl, jsonnet)[inputs]: Use nlohmann-json.
* gnu/packages/build-tools.scm (bear)[inputs]: Likewise.
* gnu/packages/cybersecurity.scm (blacksmith)[inputs]: Likewise.
* gnu/packages/databases.scm (sqlitebrowser)[inputs]: Adjust comment.
* gnu/packages/games.scm (openrct2)[inputs]: Use nlohmann-json.
* gnu/packages/graphics.scm (f3d)[native-inputs]: Likewise.
* gnu/packages/hardware.scm (openrgb)[inputs]: Likewise.
[arguments]: Adjust accordingly.
* gnu/packages/image-processing.scm (paraview)[inputs]: Adjust comment.
* gnu/packages/irods.scm (irods, irods-client-icommands)[inputs]: Use
nlohmann-json.
* gnu/packages/jupyter.scm (xeus)[inputs]: Likewise.
* gnu/packages/messaging.scm (mtxclient, nheko)[inputs]: Likewise.
* gnu/packages/text-editors.scm (jucipp)[inputs]: Likewise.
* gnu/packages/video.scm (mktoolnix)[inputs]: Likewise.
* gnu/packages/xdisorg.scm (nwg-launchers)[inputs]: Likewise.
</span></span></td><td>Liliana Marie Prikler</td></tr>