Apply Mumit Khan's patch to allow temporary file for process interconnection

1 files changed, 255 insertions, 20 deletions

diff --git a/binutils/resrc.c b/binutils/resrc.c
index 8ed6a5d..b38c75d 100644
--- a/binutils/resrc.c
+++ b/binutils/resrc.c
@@ -29,9 +29,50 @@
 
 #include <assert.h>
 #include <ctype.h>
+#include <errno.h>
 #include <sys/stat.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#else /* ! HAVE_SYS_WAIT_H */
+#if ! defined (_WIN32) || defined (__CYGWIN__)
+#ifndef WIFEXITED
+#define WIFEXITED(w)	(((w)&0377) == 0)
+#endif
+#ifndef WIFSIGNALED
+#define WIFSIGNALED(w)	(((w)&0377) != 0177 && ((w)&~0377) == 0)
+#endif
+#ifndef WTERMSIG
+#define WTERMSIG(w)	((w) & 0177)
+#endif
+#ifndef WEXITSTATUS
+#define WEXITSTATUS(w)	(((w) >> 8) & 0377)
+#endif
+#else /* defined (_WIN32) && ! defined (__CYGWIN__) */
+#ifndef WIFEXITED
+#define WIFEXITED(w)	(((w) & 0xff) == 0)
+#endif
+#ifndef WIFSIGNALED
+#define WIFSIGNALED(w)	(((w) & 0xff) != 0 && ((w) & 0xff) != 0x7f)
+#endif
+#ifndef WTERMSIG
+#define WTERMSIG(w)	((w) & 0x7f)
+#endif
+#ifndef WEXITSTATUS
+#define WEXITSTATUS(w)	(((w) & 0xff00) >> 8)
+#endif
+#endif /* defined (_WIN32) && ! defined (__CYGWIN__) */
+#endif /* ! HAVE_SYS_WAIT_H */
 
 #if defined (_WIN32) && ! defined (__CYGWIN32__)
+#ifndef STDOUT_FILENO
+#define STDOUT_FILENO 1
+#endif
+ 
+#if defined (_WIN32) && ! defined (__CYGWIN__)
 #define popen _popen
 #define pclose _pclose
 #endif
@@ -86,6 +127,15 @@ int rc_lineno;
 
 static FILE *cpp_pipe;
 
+/* The temporary file used if we're not using popen, so we can delete it
+   if we exit.  */
+
+static char *cpp_temp_file;
+
+/* Input stream is either a file or a pipe. */
+
+static enum {ISTREAM_PIPE, ISTREAM_FILE} istream_type;
+
 /* As we read the rc file, we attach information to this structure.  */
 
 static struct res_directory *resources;
@@ -112,9 +162,11 @@ static int icons;
 
 /* Local functions.  */
 
+static int run_cmd PARAMS ((char *, const char *));
+static FILE *open_input_stream PARAMS ((char *));
 static FILE *look_for_default PARAMS ((char *, const char *, int,
 				       const char *, const char *));
-static void close_pipe PARAMS ((void));
+static void close_input_stream PARAMS ((void));
 static void unexpected_eof PARAMS ((const char *));
 static int get_word PARAMS ((FILE *, const char *));
 static unsigned long get_long PARAMS ((FILE *, const char *));
@@ -122,6 +174,163 @@ static void get_data
   PARAMS ((FILE *, unsigned char *, unsigned long, const char *));
 static void define_fontdirs PARAMS ((void));
 
+/* Run `cmd' and redirect the output to `redir'. */
+
+static int
+run_cmd (cmd, redir)
+     char *cmd;
+     const char *redir;
+{
+  char *s;
+  int pid, wait_status, retcode;
+  int i;
+  const char **argv;
+  char *errmsg_fmt, *errmsg_arg;
+  char *temp_base = choose_temp_base ();
+  int in_quote;
+  char sep;
+  int redir_handle = -1;
+  int stdout_save = -1;
+
+  /* Count the args.  */
+  i = 0;
+  
+  for (s = cmd; *s; s++)
+    if (*s == ' ')
+      i++;
+  
+  i++;
+  argv = alloca (sizeof (char *) * (i + 3));
+  i = 0;
+  s = cmd;
+  
+  while (1)
+    {
+      while (*s == ' ' && *s != 0)
+	s++;
+      
+      if (*s == 0)
+	break;
+      
+      in_quote = (*s == '\'' || *s == '"');
+      sep = (in_quote) ? *s++ : ' ';
+      argv[i++] = s;
+      
+      while (*s != sep && *s != 0)
+	s++;
+      
+      if (*s == 0)
+	break;
+      
+      *s++ = 0;
+      
+      if (in_quote)
+        s++;
+    }
+  argv[i++] = NULL;
+
+  /* Setup the redirection.  We can't use the usual fork/exec and redirect
+     since we may be running on non-POSIX Windows host.  */
+
+  fflush (stdout);
+  fflush (stderr);
+
+  /* Open temporary output file.  */
+  redir_handle = open (redir, O_WRONLY | O_TRUNC | O_CREAT, 0666);
+  if (redir_handle == -1)
+    fatal (_("can't open temporary file `%s': %s"), redir, 
+           strerror (errno));
+
+  /* Duplicate the stdout file handle so it can be restored later.  */
+  stdout_save = dup (STDOUT_FILENO);
+  if (stdout_save == -1)
+    fatal (_("can't redirect stdout: `%s': %s"), redir, strerror (errno));
+
+  /* Redirect stdout to our output file.  */
+  dup2 (redir_handle, STDOUT_FILENO);
+
+  pid = pexecute (argv[0], (char * const *) argv, program_name, temp_base,
+		  &errmsg_fmt, &errmsg_arg, PEXECUTE_ONE | PEXECUTE_SEARCH);
+
+  /* Restore stdout to its previous setting.  */
+  dup2 (stdout_save, STDOUT_FILENO);
+
+  /* Close reponse file.  */
+  close (redir_handle);
+
+  if (pid == -1)
+    {
+      fatal (_("%s %s: %s"), errmsg_fmt, errmsg_arg, strerror (errno));
+      return 1;
+    }
+
+  retcode = 0;
+  pid = pwait (pid, &wait_status, 0);
+  
+  if (pid == -1)
+    {
+      fatal (_("wait: %s"), strerror (errno));
+      retcode = 1;
+    }
+  else if (WIFSIGNALED (wait_status))
+    {
+      fatal (_("subprocess got fatal signal %d"), WTERMSIG (wait_status));
+      retcode = 1;
+    }
+  else if (WIFEXITED (wait_status))
+    {
+      if (WEXITSTATUS (wait_status) != 0)
+	{
+	  fatal (_("%s exited with status %d"), cmd, 
+	         WEXITSTATUS (wait_status));
+	  retcode = 1;
+	}
+    }
+  else
+    retcode = 1;
+  
+  return retcode;
+}
+
+static FILE *
+open_input_stream (cmd)
+     char *cmd;
+{
+  if (istream_type == ISTREAM_FILE)
+    {
+      char *fileprefix;
+
+      fileprefix = choose_temp_base ();
+      cpp_temp_file = (char *) xmalloc (strlen (fileprefix) + 5);
+      sprintf (cpp_temp_file, "%s.irc", fileprefix);
+      free (fileprefix);
+
+      if (run_cmd (cmd, cpp_temp_file))
+	fatal (_("can't execute `%s': %s"), cmd, strerror (errno));
+
+      cpp_pipe = fopen (cpp_temp_file, FOPEN_RT);;
+      if (cpp_pipe == NULL)
+        fatal (_("can't open temporary file `%s': %s"), 
+	       cpp_temp_file, strerror (errno));
+      
+      if (verbose)
+	fprintf (stderr, 
+	         _("Using temporary file `%s' to read preprocessor output\n"),
+		 cpp_temp_file);
+    }
+  else
+    {
+      cpp_pipe = popen (cmd, FOPEN_RT);
+      if (cpp_pipe == NULL)
+        fatal (_("can't popen `%s': %s"), cmd, strerror (errno));
+      if (verbose)
+	fprintf (stderr, _("Using popen to read preprocessor output\n"));
+    }
+
+  xatexit (close_input_stream);
+  return cpp_pipe;
+}
+
 /* look for the preprocessor program */
 
 static FILE *
@@ -143,7 +352,11 @@ look_for_default (cmd, prefix, end_prefix, preprocargs, filename)
   if (space)
     *space = 0;
 
-  if (strchr (cmd, '/'))
+  if (
+#if defined (__DJGPP__) || defined (__CYGWIN__) || defined (_WIN32)
+      strchr (cmd, '\\') ||
+#endif
+      strchr (cmd, '/'))
     {
       found = (stat (cmd, &s) == 0
 #ifdef HAVE_EXECUTABLE_SUFFIX
@@ -154,7 +367,7 @@ look_for_default (cmd, prefix, end_prefix, preprocargs, filename)
       if (! found)
 	{
 	  if (verbose)
-	    fprintf (stderr, "Tried `%s'\n", cmd);
+	    fprintf (stderr, _("Tried `%s'\n"), cmd);
 	  return NULL;
 	}
     }
@@ -165,23 +378,26 @@ look_for_default (cmd, prefix, end_prefix, preprocargs, filename)
 	   DEFAULT_PREPROCESSOR, preprocargs, filename);
 
   if (verbose)
-    fprintf (stderr, "Using `%s'\n", cmd);
+    fprintf (stderr, _("Using `%s'\n"), cmd);
 
-  cpp_pipe = popen (cmd, FOPEN_RT);
+  cpp_pipe = open_input_stream (cmd);
   return cpp_pipe;
 }
 
 /* Read an rc file.  */
 
 struct res_directory *
-read_rc_file (filename, preprocessor, preprocargs, language)
+read_rc_file (filename, preprocessor, preprocargs, language, use_temp_file)
      const char *filename;
      const char *preprocessor;
      const char *preprocargs;
      int language;
+     int use_temp_file;
 {
   char *cmd;
 
+  istream_type = (use_temp_file) ? ISTREAM_FILE : ISTREAM_PIPE;
+
   if (preprocargs == NULL)
     preprocargs = "";
   if (filename == NULL)
@@ -195,7 +411,7 @@ read_rc_file (filename, preprocessor, preprocargs, language)
 		     + 10);
       sprintf (cmd, "%s %s %s", preprocessor, preprocargs, filename);
 
-      cpp_pipe = popen (cmd, FOPEN_RT);
+      cpp_pipe = open_input_stream (cmd);
     }
   else
     {
@@ -219,7 +435,7 @@ read_rc_file (filename, preprocessor, preprocargs, language)
 	  if (*cp == '-')
 	    dash = cp;
 	  if (
-#if defined(__DJGPP__) || defined (__CYGWIN__) || defined(__WIN32__)
+#if defined (__DJGPP__) || defined (__CYGWIN__) || defined(_WIN32)
 	      *cp == ':' || *cp == '\\' ||
 #endif
 	      *cp == '/')
@@ -257,12 +473,9 @@ read_rc_file (filename, preprocessor, preprocargs, language)
 	}
 
     }
-  if (cpp_pipe == NULL)
-    fatal (_("can't popen `%s': %s"), cmd, strerror (errno));
+  
   free (cmd);
 
-  xatexit (close_pipe);
-
   rc_filename = xstrdup (filename);
   rc_lineno = 1;
   if (language != -1)
@@ -270,10 +483,8 @@ read_rc_file (filename, preprocessor, preprocargs, language)
   yyin = cpp_pipe;
   yyparse ();
 
-  if (pclose (cpp_pipe) != 0)
-    fprintf (stderr, _("%s: warning: preprocessor failed\n"), program_name);
-  cpp_pipe = NULL;
-
+  close_input_stream ();
+  
   if (fontdirs != NULL)
     define_fontdirs ();
 
@@ -283,13 +494,37 @@ read_rc_file (filename, preprocessor, preprocargs, language)
   return resources;
 }
 
-/* Close the pipe if it is open.  This is called via xatexit.  */
+/* Close the input stream if it is open.  */
 
-void
-close_pipe ()
+static void
+close_input_stream ()
 {
   if (cpp_pipe != NULL)
     pclose (cpp_pipe);
+  
+  if (istream_type == ISTREAM_FILE)
+    {
+      if (cpp_pipe != NULL)
+	fclose (cpp_pipe);
+
+      if (cpp_temp_file != NULL)
+	{
+	  int errno_save = errno;
+	  
+	  unlink (cpp_temp_file);
+	  errno = errno_save;
+	  free (cpp_temp_file);
+	}
+    }
+  else
+    {
+      if (cpp_pipe != NULL)
+	pclose (cpp_pipe);
+    }
+
+  /* Since this is also run via xatexit, safeguard. */
+  cpp_pipe = NULL;
+  cpp_temp_file = NULL;
 }
 
 /* Report an error while reading an rc file.  */
@@ -307,7 +542,7 @@ void
 rcparse_warning (msg)
      const char *msg;
 {
-  fprintf (stderr, "%s:%d: %s\n", rc_filename, rc_lineno, msg);
+  fprintf (stderr, _("%s:%d: %s\n"), rc_filename, rc_lineno, msg);
 }
 
 /* Die if we get an unexpected end of file.  */