From: Philipp Stephani <phst@google.com>
Date: Wed, 30 Dec 2020 21:36:07 +0000 (+0100)
Subject: Minor improvements to FD_SETSIZE overflow checks.
X-Git-Tag: emacs-28.0.90~4469
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=0eef70aea892a5b783623a948808b5bc1131c8e0;p=emacs.git

Minor improvements to FD_SETSIZE overflow checks.

* src/process.c (Fmake_serial_process): Add port to error data.
(connect_network_socket): Add an explanatory comment.
---

diff --git a/src/process.c b/src/process.c
index ba2bb3c9e46..e845e2055e3 100644
--- a/src/process.c
+++ b/src/process.c
@@ -3068,7 +3068,7 @@ usage:  (make-serial-process &rest ARGS)  */)
   fd = serial_open (port);
   p->open_fd[SUBPROCESS_STDIN] = fd;
   if (FD_SETSIZE <= fd)
-    report_file_errno ("Opening serial port", Qnil, EMFILE);
+    report_file_errno ("Opening serial port", port, EMFILE);
   p->infd = fd;
   p->outfd = fd;
   if (fd > max_desc)
@@ -3332,6 +3332,7 @@ connect_network_socket (Lisp_Object proc, Lisp_Object addrinfos,
 	      xerrno = errno;
 	      continue;
 	    }
+	  /* Reject file descriptors that would be too large.  */
 	  if (FD_SETSIZE <= s)
 	    {
 	      emacs_close (s);