Minor getenv-related fixes.

* callproc.c (Fcall_process_region) [!DOS_NT]:
Avoid unnecessary duplicate call to getenv.
* callproc.c (init_callproc):
* dispnew.c (init_display):
* sysdep.c (sys_subshell):
Omit unnecessary cast of getenv or egetenv.

1 files changed, 4 insertions, 6 deletions

diff --git a/src/callproc.c b/src/callproc.c
index cb11ee0cc53..9132c0dd976 100644
--- a/src/callproc.c
+++ b/src/callproc.c
@@ -997,13 +997,11 @@ usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &r
     tmpdir = Vtemporary_file_directory;
   else
     {
+      char *outf;
 #ifndef DOS_NT
-      if (getenv ("TMPDIR"))
-        tmpdir = build_string (getenv ("TMPDIR"));
-      else
-        tmpdir = build_string ("/tmp/");
+      outf = getenv ("TMPDIR");
+      tmpdir = build_string (outf ? outf : "/tmp/");
 #else /* DOS_NT */
-      char *outf;
       if ((outf = egetenv ("TMPDIR"))
           || (outf = egetenv ("TMP"))
           || (outf = egetenv ("TEMP")))
@@ -1655,7 +1653,7 @@ init_callproc (void)
   if (! file_accessible_directory_p (SSDATA (tempdir)))
     dir_warning ("arch-independent data dir", Vdata_directory);
 
-  sh = (char *) getenv ("SHELL");
+  sh = getenv ("SHELL");
   Vshell_file_name = build_string (sh ? sh : "/bin/sh");
 
 #ifdef DOS_NT