Use binary-io module, O_BINARY, and "b" flag.

* admin/merge-gnulib (GNULIB_MODULES): Add binary-io.  It was already
present implicitly; this just makes the dependence explicit.
* lib-src/etags.c, lib-src/hexl.c, lib-src/make-docfile.c:
Include binary-io.h instead of fcntl.h and/or io.h.
(main): Use set_binary_mode or SET_BINARY
in place of handcrafted code.
* lib-src/etags.c (main) [DOS_NT]:
* lib-src/movemail.c (main) [WINDOWSNT]:
Don't mess with _fmode.
* lib-src/etags.c (main, process_file_name, analyse_regex):
Use fopen/popen's "b" flag instead.
* lib-src/movemail.c (main, popmail): Use open/lk_open/mkostemp's O_BINARY
instead.
* src/callproc.c (create_temp_file): Use mkostemp's O_BINARY flag.
* src/emacs.c [MSDOS]:
* src/emacs.c (main) [DOS_NT]: Don't mess with _fmode.
(main) [MSDOS]: Use SET_BINARY instead of setmode.
* src/minibuf.c: Include binary-io.h instead of fcntl.h.
(read_minibuf_noninteractive):
Use set_binary_mode instead of handcrafted code.
Don't call emacs_set_tty if emacs_get_tty failed.
* src/sysdep.c, src/systty.h (emacs_get_tty): Return int, not void.
* src/sysdep.c (emacs_open, emacs_pipe): Use O_BINARY.
* src/w32.c (pipe2): Adjust eassert to include O_BINARY.

Fixes: debbugs:18006

5 files changed, 41 insertions, 80 deletions

diff --git a/lib-src/ChangeLog b/lib-src/ChangeLog
index 0e0dc51f361..e108f5b2f5d 100644
--- a/lib-src/ChangeLog
+++ b/lib-src/ChangeLog
@@ -1,3 +1,18 @@
+2014-07-14  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Use binary-io module, O_BINARY, and "b" flag (Bug#18006).
+        * etags.c, hexl.c, make-docfile.c:
+        Include binary-io.h instead of fcntl.h and/or io.h.
+        (main): Use set_binary_mode or SET_BINARY
+        in place of handcrafted code.
+        * etags.c (main) [DOS_NT]:
+        * movemail.c (main) [WINDOWSNT]:
+        Don't mess with _fmode.
+        * etags.c (main, process_file_name, analyse_regex):
+        Use fopen/popen's "b" flag instead.
+        * movemail.c (main, popmail): Use open/lk_open/mkostemp's O_BINARY
+        instead.
+
 2014-07-13  Paul Eggert  <eggert@cs.ucla.edu>
 
         * make-docfile.c: Simplify a bit, to simplify further refactoring.
diff --git a/lib-src/etags.c b/lib-src/etags.c
index 5f1f99c4677..ae5491a8204 100644
--- a/lib-src/etags.c
+++ b/lib-src/etags.c
@@ -105,17 +105,13 @@ char pot_etags_version[] = "@(#) pot revision number is 17.38.1.4";
 #ifdef MSDOS
 # undef MSDOS
 # define MSDOS true
-# include <fcntl.h>
 # include <sys/param.h>
-# include <io.h>
 #else
 # define MSDOS false
 #endif /* MSDOS */
 
 #ifdef WINDOWSNT
-# include <fcntl.h>
 # include <direct.h>
-# include <io.h>
 # define MAXPATHLEN _MAX_PATH
 # undef HAVE_NTGUI
 # undef  DOS_NT
@@ -131,6 +127,7 @@ char pot_etags_version[] = "@(#) pot revision number is 17.38.1.4";
 #include <errno.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <binary-io.h>
 #include <c-strcase.h>
 
 #include <assert.h>
@@ -1002,13 +999,8 @@ main (int argc, char **argv)
   linebuffer filename_lb;
   bool help_asked = false;
   ptrdiff_t len;
- char *optstring;
- int opt;
-
-
-#ifdef DOS_NT
-  _fmode = O_BINARY;   /* all of files are treated as binary files */
-#endif /* DOS_NT */
+  char *optstring;
+  int opt;
 
   progname = argv[0];
   nincluded_files = 0;
@@ -1195,15 +1187,10 @@ main (int argc, char **argv)
       if (streq (tagfile, "-"))
         {
           tagf = stdout;
-#ifdef DOS_NT
-          /* Switch redirected `stdout' to binary mode (setting `_fmode'
-             doesn't take effect until after `stdout' is already open). */
-          if (!isatty (fileno (stdout)))
-            setmode (fileno (stdout), O_BINARY);
-#endif /* DOS_NT */
+          SET_BINARY (fileno (stdout));
         }
       else
-        tagf = fopen (tagfile, append_to_tagfile ? "a" : "w");
+        tagf = fopen (tagfile, append_to_tagfile ? "ab" : "wb");
       if (tagf == NULL)
         pfatal (tagfile);
     }
@@ -1306,7 +1293,7 @@ main (int argc, char **argv)
       append_to_tagfile = true;
     }
 
-  tagf = fopen (tagfile, append_to_tagfile ? "a" : "w");
+  tagf = fopen (tagfile, append_to_tagfile ? "ab" : "wb");
   if (tagf == NULL)
     pfatal (tagfile);
   put_entries (nodehead);       /* write all the tags (CTAGS) */
@@ -1547,11 +1534,11 @@ process_file_name (char *file, language *lang)
   if (real_name == compressed_name)
     {
       char *cmd = concat (compr->command, " ", real_name);
-      inf = (FILE *) popen (cmd, "r");
+      inf = popen (cmd, "rb");
       free (cmd);
     }
   else
-    inf = fopen (real_name, "r");
+    inf = fopen (real_name, "rb");
   if (inf == NULL)
     {
       perror (real_name);
@@ -5614,7 +5601,7 @@ analyse_regex (char *regex_arg)
         char *regexfile = regex_arg + 1;
 
         /* regexfile is a file containing regexps, one per line. */
-        regexfp = fopen (regexfile, "r");
+        regexfp = fopen (regexfile, "rb");
         if (regexfp == NULL)
           pfatal (regexfile);
         linebuffer_init (&regexbuf);
diff --git a/lib-src/hexl.c b/lib-src/hexl.c
index 9e21ddf9de6..51744ab08a2 100644
--- a/lib-src/hexl.c
+++ b/lib-src/hexl.c
@@ -24,15 +24,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include <stdio.h>
 #include <ctype.h>
-#ifdef DOS_NT
-#include <fcntl.h>
-#if __DJGPP__ >= 2
-#include <io.h>
-#endif
-#endif
-#ifdef WINDOWSNT
-#include <io.h>
-#endif
+
+#include <binary-io.h>
 
 #define DEFAULT_GROUPING        0x01
 #define DEFAULT_BASE            16
@@ -155,20 +148,12 @@ main (int argc, char **argv)
 
       if (un_flag)
         {
-          char buf[18];
-
-#ifdef DOS_NT
-#if (__DJGPP__ >= 2) || (defined WINDOWSNT)
-          if (!isatty (fileno (stdout)))
-            setmode (fileno (stdout), O_BINARY);
-#else
-          (stdout)->_flag &= ~_IOTEXT; /* print binary */
-          _setmode (fileno (stdout), O_BINARY);
-#endif
-#endif
+          SET_BINARY (fileno (stdout));
+
           for (;;)
             {
-              register int i, c = 0, d;
+              int i, c = 0, d;
+              char buf[18];
 
 #define hexchar(x) (isdigit (x) ? x - '0' : x - 'a' + 10)
 
@@ -210,15 +195,7 @@ main (int argc, char **argv)
         }
       else
         {
-#ifdef DOS_NT
-#if (__DJGPP__ >= 2) || (defined WINDOWSNT)
-          if (!isatty (fileno (fp)))
-            setmode (fileno (fp), O_BINARY);
-#else
-          (fp)->_flag &= ~_IOTEXT; /* read binary */
-          _setmode (fileno (fp), O_BINARY);
-#endif
-#endif
+          SET_BINARY (fileno (fp));
           address = 0;
           string[0] = ' ';
           string[17] = '\0';
diff --git a/lib-src/make-docfile.c b/lib-src/make-docfile.c
index 6692a0a6450..cb0a56607f8 100644
--- a/lib-src/make-docfile.c
+++ b/lib-src/make-docfile.c
@@ -38,17 +38,16 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include <stdio.h>
 #include <stdlib.h>   /* config.h unconditionally includes this anyway */
-#ifdef MSDOS
-#include <fcntl.h>
-#endif /* MSDOS */
+
 #ifdef WINDOWSNT
 /* Defined to be sys_fopen in ms-w32.h, but only #ifdef emacs, so this
    is really just insurance.  */
 #undef fopen
-#include <fcntl.h>
 #include <direct.h>
 #endif /* WINDOWSNT */
 
+#include <binary-io.h>
+
 #ifdef DOS_NT
 /* Defined to be sys_chdir in ms-w32.h, but only #ifdef emacs, so this
    is really just insurance.
@@ -167,19 +166,7 @@ main (int argc, char **argv)
       ++i;
     }
 
-  /* Don't put CRs in the output file.  */
-#ifdef MSDOS
-  _fmode = O_BINARY;
-#if 0  /* Suspicion is that this causes hanging.
-          So instead we require people to use -o on MSDOS.  */
-  (stdout)->_flag &= ~_IOTEXT;
-  _setmode (fileno (stdout), O_BINARY);
-#endif
-#endif /* MSDOS */
-#ifdef WINDOWSNT
-  _fmode = O_BINARY;
-  _setmode (fileno (stdout), O_BINARY);
-#endif /* WINDOWSNT */
+  set_binary_mode (fileno (stdout), O_BINARY);
 
   if (generate_globals)
     start_globals ();
diff --git a/lib-src/movemail.c b/lib-src/movemail.c
index d0d00fcf4cc..c600fc0ea53 100644
--- a/lib-src/movemail.c
+++ b/lib-src/movemail.c
@@ -191,11 +191,6 @@ main (int argc, char **argv)
   uid_t real_gid = getgid ();
   uid_t priv_gid = getegid ();
 
-#ifdef WINDOWSNT
-  /* Ensure all file i/o is in binary mode. */
-  _fmode = _O_BINARY;
-#endif
-
   delete_lockname = 0;
 
   while ((c = getopt (argc, argv, ARGSTR)) != EOF)
@@ -304,7 +299,7 @@ main (int argc, char **argv)
 
           memcpy (tempname, inname, inname_dirlen);
           strcpy (tempname + inname_dirlen, "EXXXXXX");
-          desc = mkostemp (tempname, 0);
+          desc = mkostemp (tempname, O_BINARY);
           if (desc < 0)
             {
               int mkostemp_errno = errno;
@@ -358,12 +353,12 @@ main (int argc, char **argv)
 
 #ifndef MAIL_USE_MMDF
 #ifdef MAIL_USE_SYSTEM_LOCK
-      indesc = open (inname, O_RDWR);
+      indesc = open (inname, O_RDWR | O_BINARY);
 #else  /* if not MAIL_USE_SYSTEM_LOCK */
-      indesc = open (inname, O_RDONLY);
+      indesc = open (inname, O_RDONLY | O_BINARY);
 #endif /* not MAIL_USE_SYSTEM_LOCK */
 #else  /* MAIL_USE_MMDF */
-      indesc = lk_open (inname, O_RDONLY, 0, 0, 10);
+      indesc = lk_open (inname, O_RDONLY | O_BINARY, 0, 0, 10);
 #endif /* MAIL_USE_MMDF */
 
       if (indesc < 0)
@@ -372,7 +367,7 @@ main (int argc, char **argv)
       /* Make sure the user can read the output file.  */
       umask (umask (0) & 0377);
 
-      outdesc = open (outname, O_WRONLY | O_CREAT | O_EXCL, 0666);
+      outdesc = open (outname, O_WRONLY | O_BINARY | O_CREAT | O_EXCL, 0666);
       if (outdesc < 0)
         pfatal_with_name (outname);
 
@@ -675,7 +670,7 @@ popmail (char *mailbox, char *outfile, int preserve, char *password, int reverse
       return EXIT_SUCCESS;
     }
 
-  mbfi = open (outfile, O_WRONLY | O_CREAT | O_EXCL, 0666);
+  mbfi = open (outfile, O_WRONLY | O_BINARY | O_CREAT | O_EXCL, 0666);
   if (mbfi < 0)
     {
       pop_close (server);