* intrinsic.c: Add EXECUTE_COMMAND_LINE intrinsic.

	* intrinsic.h (gfc_resolve_execute_command_line): New function.
	* iresolve.c (gfc_resolve_execute_command_line): New function.
	* gfortran.h (GFC_ISYM_EXECUTE_COMMAND_LINE): New value.
	* intrinsic.texi: Document EXECUTE_COMMAND_LINE.

	* intrinsics/execute_command_line.c: New file.
	* gfortran.map (_gfortran_execute_command_line_i4,
	_gfortran_execute_command_line_i8): New symbols.
	* Makefile.am: Add new file intrinsics/execute_command_line.c.
	* Makefile.in: Regenerated.

	* gfortran.dg/execute_command_line_1.f90: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@163719 138bc75d-0d04-0410-961f-82ee72b054a4

13 files changed, 376 insertions, 6 deletions

diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index cdceae8d02d..e943469eaf7 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,11 @@
+2010-09-01  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
+
+	* intrinsic.c: Add EXECUTE_COMMAND_LINE intrinsic.
+	* intrinsic.h (gfc_resolve_execute_command_line): New function.
+	* iresolve.c (gfc_resolve_execute_command_line): New function.
+	* gfortran.h (GFC_ISYM_EXECUTE_COMMAND_LINE): New value.
+	* intrinsic.texi: Document EXECUTE_COMMAND_LINE.
+
 2010-08-31  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
 
 	PR fortran/38282
diff --git a/gcc/fortran/gfortran.h b/gcc/fortran/gfortran.h
index 1ee9bd58402..b23c6471a13 100644
--- a/gcc/fortran/gfortran.h
+++ b/gcc/fortran/gfortran.h
@@ -362,6 +362,7 @@ enum gfc_isym_id
   GFC_ISYM_ERFC,
   GFC_ISYM_ERFC_SCALED,
   GFC_ISYM_ETIME,
+  GFC_ISYM_EXECUTE_COMMAND_LINE,
   GFC_ISYM_EXIT,
   GFC_ISYM_EXP,
   GFC_ISYM_EXPONENT,
diff --git a/gcc/fortran/intrinsic.c b/gcc/fortran/intrinsic.c
index c14e14d75cd..0b469ae08fb 100644
--- a/gcc/fortran/intrinsic.c
+++ b/gcc/fortran/intrinsic.c
@@ -2812,6 +2812,15 @@ add_subroutines (void)
 	      gfc_check_dtime_etime_sub, NULL, gfc_resolve_dtime_sub,
 	      vl, BT_REAL, 4, REQUIRED, tm, BT_REAL, 4, REQUIRED);
 
+  add_sym_5s ("execute_command_line", GFC_ISYM_EXECUTE_COMMAND_LINE,
+	      CLASS_IMPURE , BT_UNKNOWN, 0, GFC_STD_F2008,
+	      NULL, NULL, gfc_resolve_execute_command_line,
+	      "command", BT_CHARACTER, dc, REQUIRED, INTENT_IN,
+	      "wait", BT_LOGICAL, dl, OPTIONAL, INTENT_IN,
+	      "exitstat", BT_INTEGER, di, OPTIONAL, INTENT_INOUT,
+	      "cmdstat", BT_INTEGER, di, OPTIONAL, INTENT_OUT,
+	      "cmdmsg", BT_CHARACTER, dc, OPTIONAL, INTENT_INOUT);
+
   add_sym_1s ("fdate", GFC_ISYM_FDATE, CLASS_IMPURE, BT_UNKNOWN, 0, GFC_STD_GNU,
 	      gfc_check_fdate_sub, NULL, gfc_resolve_fdate_sub,
 	      dt, BT_CHARACTER, dc, REQUIRED);
diff --git a/gcc/fortran/intrinsic.h b/gcc/fortran/intrinsic.h
index 383ada085d4..b06c65bc9e5 100644
--- a/gcc/fortran/intrinsic.h
+++ b/gcc/fortran/intrinsic.h
@@ -538,6 +538,7 @@ void gfc_resolve_chdir_sub (gfc_code *);
 void gfc_resolve_chmod_sub (gfc_code *);
 void gfc_resolve_cpu_time (gfc_code *);
 void gfc_resolve_ctime_sub (gfc_code *);
+void gfc_resolve_execute_command_line (gfc_code *);
 void gfc_resolve_exit (gfc_code *);
 void gfc_resolve_fdate_sub (gfc_code *);
 void gfc_resolve_flush (gfc_code *);
diff --git a/gcc/fortran/intrinsic.texi b/gcc/fortran/intrinsic.texi
index 49b9d53f540..6603fb59b0b 100644
--- a/gcc/fortran/intrinsic.texi
+++ b/gcc/fortran/intrinsic.texi
@@ -104,6 +104,7 @@ Some basic guidelines for editing this document:
 * @code{ERFC}:          ERFC,      Complementary error function
 * @code{ERFC_SCALED}:   ERFC_SCALED, Exponentially-scaled complementary error function
 * @code{ETIME}:         ETIME,     Execution time subroutine (or function)
+* @code{EXECUTE_COMMAND_LINE}: EXECUTE_COMMAND_LINE, Execute a shell command
 * @code{EXIT}:          EXIT,      Exit the program with status.
 * @code{EXP}:           EXP,       Exponential function
 * @code{EXPONENT}:      EXPONENT,  Exponent function
@@ -3817,6 +3818,82 @@ end program test_etime
 
 
 
+@node EXECUTE_COMMAND_LINE
+@section @code{EXECUTE_COMMAND_LINE} --- Execute a shell command
+@fnindex EXECUTE_COMMAND_LINE
+@cindex system, system call
+@cindex command line
+
+@table @asis
+@item @emph{Description}:
+@code{EXECUTE_COMMAND_LINE} runs a shell command, synchronously or
+asynchronously.
+
+The @code{COMMAND} argument is passed to the shell and executed, using
+the C library's @code{system()} call.  (The shell is @code{sh} on Unix
+systems, and @code{cmd.exe} on Windows.)  If @code{WAIT} is present and
+has the value false, the execution of the command is asynchronous if the
+system supports it; otherwise, the command is executed synchronously.
+
+The three last arguments allow the user to get status information.  After
+synchronous execution, @code{EXITSTAT} contains the integer exit code of
+the command, as returned by @code{system}.  @code{CMDSTAT} is set to zero
+if the command line was executed (whatever its exit status was).
+@code{CMDMSG} is assigned an error message if an error has occurred.
+
+
+@item @emph{Standard}:
+Fortran 2008 and later
+
+@item @emph{Class}:
+Subroutine
+
+@item @emph{Syntax}:
+@code{CALL EXECUTE_COMMAND_LINE(COMMAND [, WAIT, EXITSTAT, CMDSTAT, CMDMSG ])}
+
+@item @emph{Arguments}:
+@multitable @columnfractions .15 .70
+@item @var{COMMAND} @tab Shall be a default @code{CHARACTER} scalar.
+@item @var{WAIT} @tab (Optional) Shall be a default @code{LOGICAL} scalar.
+@item @var{EXITSTAT} @tab (Optional) Shall be an @code{INTEGER} of the
+default kind.
+@item @var{CMDSTAT} @tab (Optional) Shall be an @code{INTEGER} of the
+default kind.
+@item @var{CMDMSG} @tab (Optional) Shall be an @code{CHARACTER} scalar of the
+default kind.
+@end multitable
+
+@item @emph{Example}:
+@smallexample
+program test_exec
+  integer :: i
+
+  call execute_command_line ("external_prog.exe", exitstat=i)
+  print *, "Exit status of external_prog.exe was ", i
+
+  call execute_command_line ("reindex_files.exe", wait=.false.)
+  print *, "Now reindexing files in the background"
+
+end program test_exec
+@end smallexample
+
+
+@item @emph{Note}:
+
+Because this intrinsic is implemented in terms of the @code{system()}
+function call, its behavior with respect to signalling is processor
+dependent. In particular, on POSIX-compliant systems, the SIGINT and
+SIGQUIT signals will be ignored, and the SIGCHLD will be blocked. As
+such, if the parent process is terminated, the child process might not be
+terminated alongside.
+
+
+@item @emph{See also}:
+@ref{SYSTEM}
+@end table
+
+
+
 @node EXIT
 @section @code{EXIT} --- Exit the program with status. 
 @fnindex EXIT
@@ -10955,6 +11032,8 @@ Subroutine, function
 @end multitable
 
 @item @emph{See also}:
+@ref{EXECUTE_COMMAND_LINE}, which is part of the Fortran 2008 standard
+and should considered in new code for future portability.
 @end table
 
 
diff --git a/gcc/fortran/iresolve.c b/gcc/fortran/iresolve.c
index 5a187ee455e..66df99e3bf5 100644
--- a/gcc/fortran/iresolve.c
+++ b/gcc/fortran/iresolve.c
@@ -3184,6 +3184,17 @@ gfc_resolve_system_clock (gfc_code *c)
 }
 
 
+/* Resolve the EXECUTE_COMMAND_LINE intrinsic subroutine.  */
+void
+gfc_resolve_execute_command_line (gfc_code *c)
+{
+  const char *name;
+  name = gfc_get_string (PREFIX ("execute_command_line_i%d"),
+			 gfc_default_integer_kind);
+  c->resolved_sym = gfc_get_intrinsic_sub_symbol (name);
+}
+
+
 /* Resolve the EXIT intrinsic subroutine.  */
 
 void
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d9f26d927f3..3acadbc0bab 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2010-09-01  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
+
+	* gfortran.dg/execute_command_line_1.f90: New test.
+
 2010-08-31  Jakub Jelinek  <jakub@redhat.com>
 
 	PR preprocessor/45457
diff --git a/gcc/testsuite/gfortran.dg/execute_command_line_1.f90 b/gcc/testsuite/gfortran.dg/execute_command_line_1.f90
new file mode 100644
index 00000000000..faaa860c9b4
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/execute_command_line_1.f90
@@ -0,0 +1,60 @@
+! { dg-do compile }
+!
+! Check that we accept all variants of the EXECUTE_COMMAND_LINE intrinsic.
+!
+  integer :: i, j
+  character(len=100) :: s
+
+  s = ""
+
+  call execute_command_line ("ls *.f90")
+
+  print *, "-----------------------------"
+
+  call execute_command_line ("sleep 1 ; ls *.f90", .false.)
+  print *, "I'm not waiting"
+  call sleep(2)
+
+  print *, "-----------------------------"
+
+  call execute_command_line ("sleep 1 ; ls *.f90", .true.)
+  print *, "I did wait"
+  call sleep(2)
+
+  print *, "-----------------------------"
+
+  call execute_command_line ("ls *.f90", .true., i)
+  print *, "Exist status was: ", i
+
+  print *, "-----------------------------"
+
+  call execute_command_line ("ls *.doesnotexist", .true., i)
+  print *, "Exist status was: ", i
+
+  print *, "-----------------------------"
+
+  call execute_command_line ("echo foo", .true., i, j)
+  print *, "Exist status was: ", i
+  print *, "Command status was: ", j
+
+  print *, "-----------------------------"
+
+  call execute_command_line ("echo foo", .true., i, j, s)
+  print *, "Exist status was: ", i
+  print *, "Command status was: ", j
+  print *, "Error message is: ", trim(s)
+
+  print *, "-----------------------------"
+
+  call execute_command_line ("ls *.doesnotexist", .true., i, j, s)
+  print *, "Exist status was: ", i
+  print *, "Command status was: ", j
+  print *, "Error message is: ", trim(s)
+
+  print *, "-----------------------------"
+
+  call execute_command_line ("sleep 20", .false.)
+  print *, "Please kill me with ^C"
+  call sleep (10)
+
+  end
diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog
index b6fa20f8b77..51d836d7ece 100644
--- a/libgfortran/ChangeLog
+++ b/libgfortran/ChangeLog
@@ -1,3 +1,11 @@
+2010-09-01  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
+
+	* intrinsics/execute_command_line.c: New file.
+	* gfortran.map (_gfortran_execute_command_line_i4,
+	_gfortran_execute_command_line_i8): New symbols.
+	* Makefile.am: Add new file intrinsics/execute_command_line.c.
+	* Makefile.in: Regenerated.
+
 2010-08-29  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
 
 	* m4/mtype.m4 (upcase, hasmathfunc, mathfunc_macro): New macros.
diff --git a/libgfortran/Makefile.am b/libgfortran/Makefile.am
index d59c6887d7f..b8dd9f89b85 100644
--- a/libgfortran/Makefile.am
+++ b/libgfortran/Makefile.am
@@ -102,6 +102,7 @@ intrinsics/eoshift0.c \
 intrinsics/eoshift2.c \
 intrinsics/erfc_scaled.c \
 intrinsics/etime.c \
+intrinsics/execute_command_line.c \
 intrinsics/exit.c \
 intrinsics/extends_type_of.c \
 intrinsics/fnum.c \
diff --git a/libgfortran/Makefile.in b/libgfortran/Makefile.in
index c6f92260d2c..fa30519524d 100644
--- a/libgfortran/Makefile.in
+++ b/libgfortran/Makefile.in
@@ -225,12 +225,12 @@ am__objects_38 = close.lo file_pos.lo format.lo inquire.lo \
 am__objects_39 = associated.lo abort.lo access.lo args.lo \
 	bit_intrinsics.lo c99_functions.lo chdir.lo chmod.lo clock.lo \
 	cpu_time.lo cshift0.lo ctime.lo date_and_time.lo dtime.lo \
-	env.lo eoshift0.lo eoshift2.lo erfc_scaled.lo etime.lo exit.lo \
-	extends_type_of.lo fnum.lo gerror.lo getcwd.lo getlog.lo \
-	getXid.lo hostnm.lo ierrno.lo ishftc.lo \
-	iso_c_generated_procs.lo iso_c_binding.lo kill.lo link.lo \
-	malloc.lo mvbits.lo move_alloc.lo pack_generic.lo perror.lo \
-	selected_char_kind.lo signal.lo size.lo sleep.lo \
+	env.lo eoshift0.lo eoshift2.lo erfc_scaled.lo etime.lo \
+	execute_command_line.lo exit.lo extends_type_of.lo fnum.lo \
+	gerror.lo getcwd.lo getlog.lo getXid.lo hostnm.lo ierrno.lo \
+	ishftc.lo iso_c_generated_procs.lo iso_c_binding.lo kill.lo \
+	link.lo malloc.lo mvbits.lo move_alloc.lo pack_generic.lo \
+	perror.lo selected_char_kind.lo signal.lo size.lo sleep.lo \
 	spread_generic.lo string_intrinsics.lo system.lo rand.lo \
 	random.lo rename.lo reshape_generic.lo reshape_packed.lo \
 	selected_int_kind.lo selected_real_kind.lo stat.lo symlnk.lo \
@@ -522,6 +522,7 @@ intrinsics/eoshift0.c \
 intrinsics/eoshift2.c \
 intrinsics/erfc_scaled.c \
 intrinsics/etime.c \
+intrinsics/execute_command_line.c \
 intrinsics/exit.c \
 intrinsics/extends_type_of.c \
 intrinsics/fnum.c \
@@ -1404,6 +1405,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/erfc_scaled.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/error.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/etime.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/execute_command_line.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/exit.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/exponent_r10.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/exponent_r16.Plo@am__quote@
@@ -5089,6 +5091,13 @@ etime.lo: intrinsics/etime.c
 @AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
 @am__fastdepCC_FALSE@	$(LIBTOOL)  --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o etime.lo `test -f 'intrinsics/etime.c' || echo '$(srcdir)/'`intrinsics/etime.c
 
+execute_command_line.lo: intrinsics/execute_command_line.c
+@am__fastdepCC_TRUE@	$(LIBTOOL)  --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT execute_command_line.lo -MD -MP -MF $(DEPDIR)/execute_command_line.Tpo -c -o execute_command_line.lo `test -f 'intrinsics/execute_command_line.c' || echo '$(srcdir)/'`intrinsics/execute_command_line.c
+@am__fastdepCC_TRUE@	$(am__mv) $(DEPDIR)/execute_command_line.Tpo $(DEPDIR)/execute_command_line.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	source='intrinsics/execute_command_line.c' object='execute_command_line.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(LIBTOOL)  --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o execute_command_line.lo `test -f 'intrinsics/execute_command_line.c' || echo '$(srcdir)/'`intrinsics/execute_command_line.c
+
 exit.lo: intrinsics/exit.c
 @am__fastdepCC_TRUE@	$(LIBTOOL)  --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT exit.lo -MD -MP -MF $(DEPDIR)/exit.Tpo -c -o exit.lo `test -f 'intrinsics/exit.c' || echo '$(srcdir)/'`intrinsics/exit.c
 @am__fastdepCC_TRUE@	$(am__mv) $(DEPDIR)/exit.Tpo $(DEPDIR)/exit.Plo
diff --git a/libgfortran/gfortran.map b/libgfortran/gfortran.map
index f33167b1a30..72dafa6d14b 100644
--- a/libgfortran/gfortran.map
+++ b/libgfortran/gfortran.map
@@ -1069,6 +1069,8 @@ GFORTRAN_1.1 {
     _gfortran_erfc_scaled_r16;
     _gfortran_erfc_scaled_r4;
     _gfortran_erfc_scaled_r8;
+    _gfortran_execute_command_line_i4;
+    _gfortran_execute_command_line_i8;
     _gfortran_pack_char4;
     _gfortran_pack_s_char4;
     _gfortran_reshape_char4;
diff --git a/libgfortran/intrinsics/execute_command_line.c b/libgfortran/intrinsics/execute_command_line.c
new file mode 100644
index 00000000000..4e3c4451d62
--- /dev/null
+++ b/libgfortran/intrinsics/execute_command_line.c
@@ -0,0 +1,177 @@
+/* Implementation of the EXECUTE_COMMAND_LINE intrinsic.
+   Copyright (C) 2009 Free Software Foundation, Inc.
+   Contributed by François-Xavier Coudert.
+
+This file is part of the GNU Fortran runtime library (libgfortran).
+
+Libgfortran is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+Libgfortran is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+#include "libgfortran.h"
+#include <string.h>
+#include <stdbool.h>
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef  HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
+
+
+enum { EXEC_NOERROR = 0, EXEC_SYSTEMFAILED };
+static const char *cmdmsg_values[] =
+  { "", "Execution of child process impossible" };
+
+
+
+static void
+set_cmdstat (int *cmdstat, int value)
+{
+  if (cmdstat)
+    *cmdstat = value;
+  else if (value != 0)
+    runtime_error ("Could not execute command line");
+}
+
+
+static void
+execute_command_line (const char *command, bool wait, int *exitstat,
+		      int *cmdstat, char *cmdmsg,
+		      gfc_charlen_type command_len,
+		      gfc_charlen_type cmdmsg_len)
+{
+  /* Transform the Fortran string to a C string.  */
+  char cmd[command_len + 1];
+  memcpy (cmd, command, command_len);
+  cmd[command_len] = '\0';
+
+  /* Flush all I/O units before executing the command.  */
+  flush_all_units();
+
+#if defined(HAVE_FORK)
+  if (!wait)
+    {
+      /* Asynchronous execution.  */
+      pid_t pid;
+
+      set_cmdstat (cmdstat, 0);
+
+      if ((pid = fork()) < 0)
+	set_cmdstat (cmdstat, EXEC_SYSTEMFAILED);
+      else if (pid == 0)
+	{
+	  /* Child process.  */
+	  int res = system (cmd);
+	  _exit (WIFEXITED(res) ? WEXITSTATUS(res) : res);
+	}
+    }
+  else
+#endif
+    {
+      /* Synchronous execution.  */
+      int res = system (cmd);
+
+      if (!wait)
+	set_cmdstat (cmdstat, -2);
+      else if (res == -1)
+	set_cmdstat (cmdstat, EXEC_SYSTEMFAILED);
+      else
+	{
+	  set_cmdstat (cmdstat, 0);
+#if defined(WEXITSTATUS) && defined(WIFEXITED)
+	  *exitstat = WIFEXITED(res) ? WEXITSTATUS(res) : res;
+#else
+	  *exitstat = res;
+#endif
+	}
+    }
+
+  /* Now copy back to the Fortran string if needed.  */
+  if (cmdstat && *cmdstat > 0)
+    {
+      if (cmdmsg)
+	fstrcpy (cmdmsg, cmdmsg_len, cmdmsg_values[*cmdstat],
+		strlen (cmdmsg_values[*cmdstat]));
+      else
+	runtime_error ("Failure in EXECUTE_COMMAND_LINE: %s",
+		       cmdmsg_values[*cmdstat]);
+    }
+}
+
+
+extern void
+execute_command_line_i4 (const char *command, GFC_LOGICAL_4 *wait,
+			 GFC_INTEGER_4 *exitstat, GFC_INTEGER_4 *cmdstat,
+			 char *cmdmsg, gfc_charlen_type command_len,
+			 gfc_charlen_type cmdmsg_len);
+export_proto(execute_command_line_i4);
+
+void
+execute_command_line_i4 (const char *command, GFC_LOGICAL_4 *wait,
+			 GFC_INTEGER_4 *exitstat, GFC_INTEGER_4 *cmdstat,
+			 char *cmdmsg, gfc_charlen_type command_len,
+			 gfc_charlen_type cmdmsg_len)
+{
+  bool w = wait ? *wait : true;
+  int estat, estat_initial, cstat;
+
+  if (exitstat)
+    estat_initial = estat = *exitstat;
+
+  execute_command_line (command, w, &estat, cmdstat ? &cstat : NULL,
+			cmdmsg, command_len, cmdmsg_len);
+
+  if (exitstat && estat != estat_initial)
+    *exitstat = estat;
+  if (cmdstat)
+    *cmdstat = cstat;
+}
+
+
+extern void
+execute_command_line_i8 (const char *command, GFC_LOGICAL_8 *wait,
+			 GFC_INTEGER_8 *exitstat, GFC_INTEGER_8 *cmdstat,
+			 char *cmdmsg, gfc_charlen_type command_len,
+			 gfc_charlen_type cmdmsg_len);
+export_proto(execute_command_line_i8);
+
+void
+execute_command_line_i8 (const char *command, GFC_LOGICAL_8 *wait,
+			 GFC_INTEGER_8 *exitstat, GFC_INTEGER_8 *cmdstat,
+			 char *cmdmsg, gfc_charlen_type command_len,
+			 gfc_charlen_type cmdmsg_len)
+{
+  bool w = wait ? *wait : true;
+  int estat, estat_initial, cstat;
+
+  if (exitstat)
+    estat_initial = estat = *exitstat;
+
+  execute_command_line (command, w, &estat, cmdstat ? &cstat : NULL,
+			cmdmsg, command_len, cmdmsg_len);
+
+  if (exitstat && estat != estat_initial)
+    *exitstat = estat;
+  if (cmdstat)
+    *cmdstat = cstat;
+}