Simplify unexec file mode setting

* unexaix.c, unexcoff.c, unexelf.c, unexmacosx.c:
Don't include <sys/stat.h> when no longer needed.
(unexec): Create file with correct mode in the first place,
rather than overwriting the mode later and fiddling with the
global umask in the mean time.  Avoid bogus usage like
'umask (777)', which should have been 'umask (0777)'.
(mark_x): Remove. All callers removed.

src/ChangeLog

+2014-12-20  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Simplify unexec file mode setting
+	* unexaix.c, unexcoff.c, unexelf.c, unexmacosx.c:
+	Don't include <sys/stat.h> when no longer needed.
+	(unexec): Create file with correct mode in the first place,
+	rather than overwriting the mode later and fiddling with the
+	global umask in the mean time.  Avoid bogus usage like
+	'umask (777)', which should have been 'umask (0777)'.
+	(mark_x): Remove. All callers removed.
+
 2014-12-19  Paul Eggert  <eggert@cs.ucla.edu>
 	Minor cleanups for Lisp objects and symbols

src/unexaix.c

@@ -55,7 +55,6 @@ what you give them.   Help stamp out software-hoarding!  */
 #include <inttypes.h>
 #include <stdarg.h>
 #include <stdio.h>
-#include <sys/stat.h>
 #include <errno.h>
 #include <unistd.h>
 #include <fcntl.h>
@@ -134,7 +133,7 @@ unexec (const char *new_name, const char *a_name)
     {
       PERROR (a_name);
     }
-  if ((new = emacs_open (new_name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0)
+  if ((new = emacs_open (new_name, O_WRONLY | O_CREAT | O_TRUNC, 0777)) < 0)
     {
       PERROR (new_name);
     }
@@ -152,7 +151,6 @@ unexec (const char *new_name, const char *a_name)
   emacs_close (new);
   if (a_out >= 0)
     emacs_close (a_out);
-  mark_x (new_name);
 }
 
 /* ****************************************************************
@@ -466,29 +464,6 @@ copy_sym (int new, int a_out, const char *a_name, const char *new_name)
   return 0;
 }
 
-/* ****************************************************************
- * mark_x
- *
- * After successfully building the new a.out, mark it executable
- */
-static void
-mark_x (const char *name)
-{
-  struct stat sbuf;
-  int um;
-  int new = 0;  /* for PERROR */
-
-  um = umask (777);
-  umask (um);
-  if (stat (name, &sbuf) == -1)
-    {
-      PERROR (name);
-    }
-  sbuf.st_mode |= 0111 & ~um;
-  if (chmod (name, sbuf.st_mode) == -1)
-    PERROR (name);
-}
-
 static int
 adjust_lnnoptrs (int writedesc, int readdesc, const char *new_name)
 {

src/unexcoff.c

@@ -97,7 +97,6 @@ struct aouthdr
 #include <sys/types.h>
 #endif /* makedev */
 #include <stdio.h>
-#include <sys/stat.h>
 #include <errno.h>
 
 #include <sys/file.h>
@@ -439,29 +438,6 @@ copy_sym (int new, int a_out, const char *a_name, const char *new_name)
   return 0;
 }
 
-/* ****************************************************************
- * mark_x
- *
- * After successfully building the new a.out, mark it executable
- */
-static void
-mark_x (const char *name)
-{
-  struct stat sbuf;
-  int um;
-  int new = 0;  /* for PERROR */
-
-  um = umask (777);
-  umask (um);
-  if (stat (name, &sbuf) == -1)
-    {
-      PERROR (name);
-    }
-  sbuf.st_mode |= 0111 & ~um;
-  if (chmod (name, sbuf.st_mode) == -1)
-    PERROR (name);
-}
-
 
 /*
  *	If the COFF file contains a symbol table and a line number section,
@@ -542,7 +518,7 @@ unexec (const char *new_name, const char *a_name)
     {
       PERROR (a_name);
     }
-  if ((new = emacs_open (new_name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0)
+  if ((new = emacs_open (new_name, O_WRONLY | O_CREAT | O_TRUNC, 0777)) < 0)
     {
       PERROR (new_name);
     }
@@ -560,7 +536,6 @@ unexec (const char *new_name, const char *a_name)
   emacs_close (new);
   if (a_out >= 0)
     emacs_close (a_out);
-  mark_x (new_name);
 }
 
 #endif /* not CANNOT_DUMP */

src/unexelf.c

@@ -665,7 +665,6 @@ unexec (const char *new_name, const char *old_name)
 #endif
   struct stat stat_buf;
   off_t old_file_size;
-  int mask;
 
   /* Open the old file, allocate a buffer of the right size, and read
      in the file contents.  */
@@ -799,7 +798,7 @@ unexec (const char *new_name, const char *old_name)
      the image of the new file.  Set pointers to various interesting
      objects.  */
 
-  new_file = emacs_open (new_name, O_RDWR | O_CREAT, 0666);
+  new_file = emacs_open (new_name, O_RDWR | O_CREAT, 0777);
   if (new_file < 0)
     fatal ("Can't creat (%s): %s", new_name, strerror (errno));
 
@@ -1319,13 +1318,4 @@ unexec (const char *new_name, const char *old_name)
 
   if (emacs_close (new_file) != 0)
     fatal ("Can't close (%s): %s", new_name, strerror (errno));
-
-  if (stat (new_name, &stat_buf) != 0)
-    fatal ("Can't stat (%s): %s", new_name, strerror (errno));
-
-  mask = umask (777);
-  umask (mask);
-  stat_buf.st_mode |= 0111 & ~mask;
-  if (chmod (new_name, stat_buf.st_mode) != 0)
-    fatal ("Can't chmod (%s): %s", new_name, strerror (errno));
 }

src/unexmacosx.c

@@ -1267,7 +1267,7 @@ unexec (const char *outfile, const char *infile)
       unexec_error ("cannot open input file `%s'", infile);
     }
 
-  outfd = emacs_open (outfile, O_WRONLY | O_TRUNC | O_CREAT, 0755);
+  outfd = emacs_open (outfile, O_WRONLY | O_TRUNC | O_CREAT, 0777);
   if (outfd < 0)
     {
       emacs_close (infd);