Patch originally from https://sources.debian.net/patches/erlang/1:20.0.1%2Bdfsg-2/man.patch/
by Francois-Denis Gonthier <neumann@lostwebsite.net>.

Patch description rewritten for Guix.

This patch allows access to the man page with the 'erl -man' command
(Erlang manual pages are placed to /gnu/store/..erlang../share/man/ hierarchy
as other man pages.)

--- a/erts/etc/common/erlexec.c
+++ b/erts/etc/common/erlexec.c
@@ -709,8 +709,10 @@
 			error("-man not supported on Windows");
 #else
 			argv[i] = "man";
-			erts_snprintf(tmpStr, sizeof(tmpStr), "%s/man", rootdir);
-			set_env("MANPATH", tmpStr);
+			/*
+			* Conform to erlang-manpages content.
+			*/
+			putenv(strsave("MANSECT=1:3:5:7"));
 			execvp("man", argv+i);
 			error("Could not execute the 'man' command.");
 #endif
on>
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<div class='path'>path: <a href='/guix/log/?id=f2752d61bd80df3bd503a861d8a40f6170bd5beb'>root</a>/<a href='/guix/log/tests?id=f2752d61bd80df3bd503a861d8a40f6170bd5beb'>tests</a>/<a href='/guix/log/tests/syscalls.scm?id=f2752d61bd80df3bd503a861d8a40f6170bd5beb'>syscalls.scm</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/tests/syscalls.scm?id=f2752d61bd80df3bd503a861d8a40f6170bd5beb&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-11-25 16:29:25 +0100'>2023-11-25</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=e04f8fe4ea50f81847cad98a5dc6b32c27b81ea2'>tests: Use ‘test-equal’ for ‘terminal-string-width’ tests.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/syscalls.scm ("terminal-string-width English")
("terminal-string-width Japanese"): Use ‘test-equal’.

Change-Id: I3791b2e4c9e35735db6c6da995da8ef0f9a71804
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-11-11 11:07:27 +0100'>2023-11-11</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=fd11d7fbf8e0fcc61ff764dcc0ab737971afc55a'>guix: syscalls: Add terminal-string-width.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/build/syscalls.scm (terminal-width): New procedure.
* tests/syscalls.scm: Add tests.

Change-Id: I6c2caa9fbaffb1e8f4b8933103399be970d5a8f3
</span></span></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2021-10-26 12:46:27 +0200'>2021-10-26</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=f87371bf3e952a211782311dad2971c8820a5150'>syscalls: Add 'openpty' and 'login-tty'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/build/syscalls.scm (openpty, login-pty): New procedures.
* tests/syscalls.scm ("openpty", "openpty + login-tty"): New tests.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-02-25 11:29:35 +0100'>2021-02-25</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=7e9d9f28e997e7faad28cdd1c416be174d6986e7'>syscalls: Add 'mounts' and the &lt;mount&gt; record type.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/build/syscalls.scm (&lt;mount&gt;): New record type.
(option-string-&gt;mount-flags, mount-flags)
(octal-decode, mounts): New procedures.
(mount-points): Rewrite in terms of 'mount'.
* tests/syscalls.scm ("mounts"): New test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-06-28 23:32:52 +0200'>2020-06-28</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=5e113cf4424b2746cbf3633cd2106c62b89e5b49'>tests: Do not fail when network interface aliases are present.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://bugs.gnu.org/42111&gt;.

* tests/syscalls.scm ("network-interface-names"): Filter interface names with
a colon.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-06-05 19:20:23 +0200'>2020-06-05</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=ea924134f819eef072ba7df9080d39de97fd73e6'>tests: syscall: Support file-systems without extended attributes.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/syscalls.scm (setxattr): Catch ENOTSUP that can be raised if the
file-system does not support extended user attributes.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2020-06-02 10:24:03 +0200'>2020-06-02</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=cb21c14b0ae1f4c9fcad4927e3b2eb0c06d7b018'>tests: Allow passing on systems without support for swap devices.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/syscalls.scm ("swapon", "swapoff"): Accept ENOSYS as a valid result.

Signed-off-by: Mathieu Othacehe &lt;othacehe@gnu.org&gt;
</span></span></td><td>Simon South</td></tr>
<tr><td><span title='2020-05-14 00:48:12 +0200'>2020-05-14</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=df05842332be80ed7f53022402b95cf711163b41'>syscalls: Add 'getxattr'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/build/syscalls.scm (getxattr): New procedure.
* tests/syscalls.scm ("getxattr, setxattr"): Test it, together with setxattr.
</span></span></td><td>Jan (janneke) Nieuwenhuizen</td></tr>