A few more minor file errno-reporting bugs.

* callproc.c (Fcall_process):
* doc.c (Fsnarf_documentation):
* fileio.c (Frename_file, Fadd_name_to_file, Fmake_symbolic_link):
* process.c (set_socket_option):
Don't let a constructor trash errno.
* doc.c: Include <errno.h>.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/callproc.c b/src/callproc.c
index 85ebf449e43..e0040ada609 100644
--- a/src/callproc.c
+++ b/src/callproc.c
@@ -405,7 +405,11 @@ usage: (call-process PROGRAM &optional INFILE DESTINATION DISPLAY &rest ARGS)  *
 
   filefd = emacs_open (SSDATA (infile), O_RDONLY, 0);
   if (filefd < 0)
-    report_file_error ("Opening process input file", DECODE_FILE (infile));
+    {
+      int open_errno = errno;
+      report_file_errno ("Opening process input file", DECODE_FILE (infile),
+                         open_errno);
+    }
 
   if (STRINGP (output_file))
     {