cli for MacOSX with MACH_O, same as unix, except : and , are used

in paths and object files generated by the c compiler have different
names


git-svn-id: https://svn.cs.ru.nl/repos/clean-compiler/trunk@1519 1f8540f1-abd5-4d5b-9d24-4c5ce8603e2d

12 files changed, 730 insertions, 0 deletions

diff --git a/main/Mac cli/Clean.h b/main/Mac cli/Clean.h
new file mode 100644
index 0000000..1508c1b
--- /dev/null
+++ b/main/Mac cli/Clean.h
@@ -0,0 +1,28 @@
+
+#define Clean(a)
+
+typedef struct clean_string *CleanString;
+
+/*	a string in Clean is:
+	struct clean_string {
+		int clean_string_length;
+		char clean_string_characters[clean_string_length];
+	};
+	The string does not end with a '\0' !
+*/
+
+/* CleanStringLength(clean_string) returns length of the clean_string in characters */
+#define CleanStringLength(clean_string) (*(unsigned int *)(clean_string))
+
+/* CleanStringCharacters(clean_string) returns a pointer to the characters of the clean_string */
+#define CleanStringCharacters(clean_string) ((char*)(1+(unsigned int *)(clean_string)))
+
+/* CleanStringSizeInts(string_length) return size of CleanString in integers */
+#define CleanStringSizeInts(string_length) (1+(((unsigned int)(string_length)+3)>>2))
+
+/* CleanStringVariable(clean_string,string_length) defines variable clean_string with length string_length,
+   before using the clean_string variable, cast to CleanString, except for the macros above  */
+#define CleanStringVariable(clean_string,string_length) unsigned int clean_string[CleanStringSizeInts(string_length)]
+
+/* CleanStringSizeBytes(string_length) return size of CleanString in bytes */
+#define CleanStringSizeBytes(string_length) (4+(((unsigned int)(string_length)+3) & -4))
diff --git a/main/Mac cli/CoclSystemDependent.dcl b/main/Mac cli/CoclSystemDependent.dcl
new file mode 100644
index 0000000..abe673f
--- /dev/null
+++ b/main/Mac cli/CoclSystemDependent.dcl
@@ -0,0 +1,28 @@
+// this is for Windows
+definition module CoclSystemDependent
+
+//1.3
+from StdString import String
+from StdFile import Files
+//3.1
+/*2.0
+from StdFile import ::Files
+0.2*/
+
+// RWS split
+// from deltaIOSystem import DeviceSystem
+// from deltaEventIO import InitialIO, IOState
+
+PathSeparator
+	:==	','
+DirectorySeparator
+	:== ':'
+
+SystemDependentDevices :: [a]
+SystemDependentInitialIO :: [a]
+
+ensureCleanSystemFilesExists :: !String !*Files -> (!Bool, !*Files)
+set_compiler_id :: Int -> Int
+
+compiler_loop :: ([{#Char}] *st -> *(Bool, *st)) *st -> (!Bool, !*st)
+
diff --git a/main/Mac cli/CoclSystemDependent.icl b/main/Mac cli/CoclSystemDependent.icl
new file mode 100644
index 0000000..715b509
--- /dev/null
+++ b/main/Mac cli/CoclSystemDependent.icl
@@ -0,0 +1,122 @@
+// this is for Unix
+implementation module CoclSystemDependent
+
+import StdEnv
+import StdDebug
+import ArgEnv
+import ipc
+from filesystem import ensureDirectoryExists
+
+import code from "cDirectory_c.o"
+import code from "ipc_c.o"
+
+PathSeparator
+	:==	','
+DirectorySeparator
+	:== ':'
+
+SystemDependentDevices :: [a]
+SystemDependentDevices
+		=	[]
+
+SystemDependentInitialIO :: [a]
+SystemDependentInitialIO
+		=	[]
+
+set_compiler_id :: Int -> Int
+set_compiler_id compiler_id = compiler_id
+
+ensureCleanSystemFilesExists :: !String !*Files -> (!Bool, !*Files)
+// returned bool: now there is such a subfolder
+ensureCleanSystemFilesExists path env
+	= ensureDirectoryExists path env
+
+	
+compiler_loop :: ([{#Char}] *st -> *(Bool, *st)) *st -> (!Bool, !*st)
+compiler_loop compile compile_state
+	| length commandArgs==3 && commandArgs!!0=="--pipe"
+		# commands_name= (commandArgs!!1);
+		# results_name= (commandArgs!!2);
+		= (True,compile_loop compile commands_name results_name compile_state)
+		# (r,compile_state)=compile commandArgs compile_state
+		= (r,compile_state)
+	where
+		commandArgs
+			=	tl [arg \\ arg <-: getCommandLine]
+// ... Unix
+
+string_to_args string
+	= string_to_args 0;
+	where
+		l=size string;
+		
+		string_to_args i
+			# end_spaces_i=skip_spaces i;
+			| end_spaces_i==l
+				= []
+			| string.[end_spaces_i]=='"'
+				# next_double_quote_i=skip_to_double_quote (end_spaces_i+1)
+				| next_double_quote_i>=l
+					= [string % (end_spaces_i,l-1)]
+					# arg=string % (end_spaces_i+1,next_double_quote_i-1);
+					= [arg : string_to_args (next_double_quote_i+1)];
+				# space_i=skip_to_space (end_spaces_i+1)
+				| space_i>=l
+					= [string % (end_spaces_i,l-1)]
+					# arg=string % (end_spaces_i,space_i-1);
+					= [arg : string_to_args (space_i+1)];
+
+		skip_spaces i
+			| i>=l
+				= l;
+			# c=string.[i];
+			| c==' ' || c=='\t'
+				= skip_spaces (i+1);
+				= i;
+
+		skip_to_space i
+			| i>=l
+				= l;
+			# c=string.[i];
+			| c==' ' || c=='\t'
+				= i;
+				= skip_to_space (i+1);
+
+		skip_to_double_quote i
+			| i>=l
+				= l;
+			# c=string.[i];
+			| c=='"'
+				= i;
+				= skip_to_double_quote (i+1);
+
+
+compile_loop :: ([{#Char}] *st -> *(Bool, *st)) {#Char} {#Char} *st -> *st
+compile_loop compile commands results compile_state
+	# r=open_pipes commands results;
+	| r<>0
+		= abort ("compile_loop\n");
+	=	compile_files compile compile_state
+
+compile_files :: ([{#Char}] *st -> *(Bool, *st)) *st -> *st
+compile_files compile compile_state
+	# n = get_command_length;
+	| n==(-1)
+		= abort "compile_files 1";
+	# string=createArray n '\0';
+	# r=get_command string;
+	| r<>0
+		= abort ("compile_files 2 ");
+	# args=string_to_args (string % (0,size string-2))
+	= case args of
+		["cocl":cocl_args]
+			# (ok,compile_state)=compile cocl_args compile_state
+			# result=if ok 0(-1);
+			# r=send_result result
+			| r<>0
+				-> abort "compile_files 3";
+				-> compile_files compile compile_state
+		["quit"]
+			-> /* trace_n "quiting" */ compile_state;
+		_
+				-> abort "compile_files 4"
diff --git a/main/Mac cli/Makefile b/main/Mac cli/Makefile
new file mode 100644
index 0000000..f8ae7f3
--- /dev/null
+++ b/main/Mac cli/Makefile
@@ -0,0 +1,5 @@
+CC=gcc
+CFLAGS=-pedantic -Wall -W -O
+CPPFLAGS=
+
+all: cDirectory.o ipc.o set_return_code_c.o
diff --git a/main/Mac cli/cDirectory.c b/main/Mac cli/cDirectory.c
new file mode 100644
index 0000000..b95f19b
--- /dev/null
+++ b/main/Mac cli/cDirectory.c
@@ -0,0 +1,339 @@
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <time.h>
+#include <dirent.h>
+#include <unistd.h>
+#include <stdio.h>
+#include "Clean.h"
+
+#ifndef NAME_MAX
+#define NAME_MAX 500
+#endif
+
+#define FALSE 0
+#define TRUE (!FALSE)
+
+// error codes:
+#define NoDirError           0
+#define OtherDirError       -1
+#define DoesntExist         -2
+#define BadName             -3
+#define NotEnoughSpace      -4
+#define AlreadyExists       -5
+#define NoPermission        -6
+#define MoveIntoOffspring   -7
+#define MoveAcrossDisks     -8
+#define NotYetRemovable     -9
+
+uid_t           gUserId;
+gid_t           gGroupId;
+struct DIR      *gpDir;
+struct dirent   *gpDirent;
+struct stat     gFileStat;
+char            *gPath;
+int             gPathLength;
+CleanStringVariable(gFileName,NAME_MAX+1);
+
+static int unix_error_to_clean_error(int errCode)
+{
+    switch(errCode) {
+        case ENOENT:
+        case ENOTDIR:       return DoesntExist;
+        case ENAMETOOLONG:  return BadName;
+        case EMLINK:
+        case ENOSPC:        return NotEnoughSpace;
+        case EISDIR:
+        case EEXIST:        return AlreadyExists;
+        case EPERM:
+        case EACCES:
+        case EROFS:         return NoPermission;
+        case EINVAL:        return MoveIntoOffspring;
+        case EXDEV:         return MoveAcrossDisks;
+        case ENOTEMPTY:     return NotYetRemovable;
+        default:            return OtherDirError;
+        };
+}
+
+static int openSearch(const char *path, int length)
+{
+    int     i;
+    
+    gPathLength = length;
+    gPath   = (char*) malloc(gPathLength+NAME_MAX+2);
+    if (!gPath) {
+        gpDir   = NULL;
+        return 0;
+        }
+    else {
+        memcpy(gPath, path, gPathLength);
+        gPath[gPathLength]  = '\0';
+        gpDir   = (struct DIR*) opendir(gPath);
+        if (!gpDir)
+            return unix_error_to_clean_error(errno);
+        gPath[gPathLength]  = '/'; // filename will be added later
+        gUserId = getuid();
+        gGroupId    = getgid();
+        return NoDirError;
+        };
+}
+
+int findFirstFileC(CleanString cs_path)
+{
+    int errCode;
+    
+    errCode = openSearch(CleanStringCharacters(cs_path), CleanStringLength(cs_path));
+    if (errCode)
+        return errCode;
+    else
+        return findNextFileC(0);
+}
+
+void getCommonFileInfoC(int also_get_file_name,
+                        CleanString *pFileName, int *pFileSizeLow, int *pFileSizeHigh,
+                        int *pYear, int *pMonth, int *pDay, int *pDayNr,
+                        int *pHours, int *pMinutes, int *pSeconds,
+                        int *pIsDirectory, int *pIsReadOnly)
+// requires gFileName and gFileStat to be initialized
+{
+    struct tm   *pModificationTime;
+    int         mask;
+    static int null = 0;
+
+    *pFileName      = also_get_file_name ? (CleanString) gFileName : (CleanString) &null;
+    *pFileSizeLow   = gFileStat.st_size;
+    *pFileSizeHigh  = 0;
+    pModificationTime= localtime(&gFileStat.st_mtime);
+    *pYear          = pModificationTime->tm_year+1900;
+    *pMonth         = pModificationTime->tm_mon+1;
+    *pDay           = pModificationTime->tm_mday;
+    *pDayNr         = pModificationTime->tm_wday+1;
+    *pHours         = pModificationTime->tm_hour;
+    *pMinutes       = pModificationTime->tm_min;
+    *pSeconds       = pModificationTime->tm_sec % 60;
+    *pIsDirectory   = (gFileStat.st_mode & S_IFDIR) != 0;
+    mask            = gUserId==gFileStat.st_uid ? S_IWUSR
+                        : gGroupId==gFileStat.st_gid ? S_IWGRP
+                            : S_IWOTH;
+    *pIsReadOnly    = (gFileStat.st_mode & mask) == 0;
+}
+
+int findNextFileC(int dummy)
+// return values: 0=ok, 1=no further files in directory
+{
+    int i;
+
+    gpDirent    = readdir((void*)gpDir);
+    if (!gpDirent)
+        return 1;
+
+    for(i=0; gpDirent->d_name[i]!='\0' && i<NAME_MAX; i++) {
+        CleanStringCharacters(gFileName)[i] = gpDirent->d_name[i];
+        gPath[gPathLength+1+i]  = gpDirent->d_name[i];
+        };
+    CleanStringLength(gFileName)= i;
+    gPath[gPathLength+1+i]      = '\0';
+    gFileStat.st_size   = 0;
+    gFileStat.st_mode   = 0;
+    lstat(gPath,&gFileStat);
+    return 0;
+}
+
+int getPlatformIdC(int dummy)
+{
+#define UnixPlatform 0 
+    return UnixPlatform;
+}
+
+void getWindowsFileInfoC()
+{}
+
+
+void getMacFileInfoC()
+{}
+
+void getUnixFileInfoC(int *pModeBits, int *pOwnerUserId, int *pOwnerGroupId,
+                        int *pLAYear, int *pLAMonth, int *pLADay, int *pLADayNr,    // last access time
+                        int *pLAHours, int *pLAMinutes, int *pLASeconds)            // dito 
+{
+    struct tm   *pModificationTime;
+
+    *pModeBits      = gFileStat.st_mode;
+    *pOwnerUserId   = gFileStat.st_uid;
+    *pOwnerGroupId  = gFileStat.st_gid;
+    pModificationTime= localtime(&gFileStat.st_atime);
+    *pLAYear        = pModificationTime->tm_year+1900;
+    *pLAMonth       = pModificationTime->tm_mon+1;
+    *pLADay         = pModificationTime->tm_mday;
+    *pLADayNr       = pModificationTime->tm_wday+1;
+    *pLAHours       = pModificationTime->tm_hour;
+    *pLAMinutes     = pModificationTime->tm_min;
+    *pLASeconds     = pModificationTime->tm_sec % 60;
+}
+
+
+void closeSearchC()
+{
+    free(gPath);
+    if (gpDir)
+        closedir((void*)gpDir);
+}
+
+int findSingleFileC(CleanString cs_path)
+{
+    int err,i,length;
+    char *path_chars;
+    
+    gFileStat.st_size   = 0;
+    gFileStat.st_mode   = 0;
+
+    path_chars = CleanStringCharacters(cs_path);
+    if (lstat(path_chars,&gFileStat))
+        return unix_error_to_clean_error(errno);
+        
+    i = CleanStringLength(cs_path)-2;
+    while (i>=0 && path_chars[i]!='/')
+        i--;
+    // the last path element ranges from path_chars[i+1] to path_chars[CleanStringLength(cs_path)-2]
+
+    length = CleanStringLength(cs_path)-2-i;
+    CleanStringLength(gFileName) = length;
+    memcpy(CleanStringCharacters(gFileName), path_chars+i+1, length);
+        
+    return NoDirError;
+}
+
+void closeSingleSearchC()
+{}
+
+int createDirectoryC(CleanString cs_path)
+{
+    int err;
+    
+    err = mkdir(CleanStringCharacters(cs_path),
+                 S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);
+    // access rights for newly created directory: rwx--x--x
+    if (err)
+        return unix_error_to_clean_error(errno);
+    else
+        return NoDirError;
+}
+
+int fremoveC(CleanString cs_path)
+{
+    int err;
+    
+    err = remove(CleanStringCharacters(cs_path));
+    if (err) {
+        if (errno==EEXIST)
+            return NotYetRemovable;
+        else
+            return unix_error_to_clean_error(errno);
+        }
+    else
+        return NoDirError;
+}
+
+// Try this code with slackware linux, if the testLinux program doesn't work
+//int fremoveC(CleanString cs_path)
+//{
+//  int err;
+//  
+//  err = unlink(CleanStringCharacters(cs_path));
+//  if (err) {
+//      if (errno==EPERM) {
+//          err = rmdir(CleanStringCharacters(cs_path));
+//          if (err)
+//              return unix_error_to_clean_error(errno);
+//          else
+//              return NoDirError;
+//          }
+//      else
+//          return unix_error_to_clean_error(errno);
+//      }
+//  else
+//      return NoDirError;
+//}
+
+#define OK 0
+#define STRING_TOO_SMALL 1
+
+int getCurrentDirectory_SE(CleanString cs)
+{
+    if (getcwd(CleanStringCharacters(cs), CleanStringLength(cs))) {
+        // success. convert C String to Clean string
+        int i;
+        i = 0;
+        while(CleanStringCharacters(cs)[i]!='\0')
+            i++;
+        CleanStringLength(cs) = i;
+        return OK;
+        }
+    else {
+        // failure
+        if (errno==EACCES) {
+            // the permission to read the current directory was denied (how ever)
+            // return root directory
+            CleanStringLength(cs) = 1;
+            CleanStringCharacters(cs)[0] = '/';
+            return OK;
+            }
+        else
+            return STRING_TOO_SMALL;
+        };
+}       
+
+void get_mac_dir_parent_and_name_C()
+{
+}
+
+int setCurrentDirectoryC(CleanString csPath)
+{
+    int err;
+    
+    err = chdir(CleanStringCharacters(csPath));
+    if (err)
+        return unix_error_to_clean_error(errno);
+    else
+        return NoDirError;
+}
+
+void getMacDiskNameC()
+{}
+
+void get_windows_disk_available_bits_C()
+{}
+
+void macRenameC()
+{}
+
+void macMoveC()
+{}
+
+int fmoveC(int overwrite, CleanString from, CleanString to)
+{
+    int err,clean_err;
+    
+    if (overwrite) {
+        err = rename(CleanStringCharacters(from), CleanStringCharacters(to));
+        if (err && errno==ENOTDIR) {
+            // from is a directory and to a file
+            // try again after removing to
+            err = remove(CleanStringCharacters(to));
+            if (!err)
+                err = rename(CleanStringCharacters(from), CleanStringCharacters(to));
+            };
+        clean_err = err ? unix_error_to_clean_error(errno) : NoDirError;
+        }
+    else {
+        struct stat fileStat;
+        if (stat(CleanStringCharacters(to),&fileStat)) {
+            err = rename(CleanStringCharacters(from), CleanStringCharacters(to));
+            clean_err = err ? unix_error_to_clean_error(errno) : NoDirError;
+            }
+        else
+            clean_err = AlreadyExists;
+        };
+    return clean_err;
+}
diff --git a/main/Mac cli/ipc.c b/main/Mac cli/ipc.c
new file mode 100644
index 0000000..4ff823a
--- /dev/null
+++ b/main/Mac cli/ipc.c
@@ -0,0 +1,123 @@
+/*
+	Unix clm/cocl interface
+
+	Ronny Wichers Schreur
+
+*/
+# include <stdio.h>
+# include <stdlib.h>
+# include <stdarg.h>
+# include <strings.h>
+
+/*
+	Clean string
+	============
+*/
+typedef struct clean_string {int length; char chars [1]; } *CleanString;
+
+# define Clean(ignore)
+# include "ipc.h"
+
+static void
+log (char *format, ...)
+{
+#ifdef DEBUG
+	va_list ap;
+
+	va_start (ap, format);
+	(void) fputs("                        cocl: ", stderr);
+	(void) vfprintf(stderr, format, ap);
+	va_end(ap);
+#else /* ifndef DEBUG */
+#endif
+}
+
+static char *
+ConvertCleanString (CleanString string)
+{
+	int		length;
+	char	*copy;
+
+	length	= string->length;
+	copy	= malloc (length+1);
+	strncpy (copy, string->chars, length);
+	copy [length]	= '\0';
+
+	return (copy);
+} /* ConvertCleanString */
+
+static FILE *commands, *results;
+# define COMMAND_BUFFER_SIZE 1024
+static char command_buffer[COMMAND_BUFFER_SIZE];
+
+static void
+crash (void)
+{
+	int	*p;
+
+	p	= NULL;
+	log ("crashing\n");
+	*p	= 0;
+} /* crash */
+
+static void
+hang (void)
+{
+	log ("hanging\n");
+	for (;;)
+		;
+} /* hang */
+
+int open_pipes (CleanString commands_clean, CleanString results_clean)
+{
+	char *commands_name, *results_name;
+
+	commands_name	= ConvertCleanString (commands_clean);
+	results_name	= ConvertCleanString (results_clean);
+
+    if ((commands = fopen(commands_name, "r")) == NULL)
+    {
+		log("commands = %s\n",commands_name);
+		perror("fopen commands");
+		return -1;
+    }
+    if ((results = fopen(results_name, "w")) == NULL)
+    {
+		log("results = %s\n",results_name);
+		perror("fopen results");
+		return -1;
+    }
+	return 0;
+}
+
+int get_command_length (void)
+{
+	log ("reading command\n");
+	if (fgets (command_buffer, COMMAND_BUFFER_SIZE, commands) == NULL)
+		return -1;
+	else	
+	{
+		log ("command = %s", command_buffer);
+		return (strlen (command_buffer));
+	}
+}
+
+int get_command (CleanString cleanString)
+{
+	log ("%s\n", command_buffer);
+	strncpy (cleanString->chars, command_buffer, cleanString->length);
+	return (0);
+}
+
+int send_result (int result)
+{
+	int	r;
+
+	if (fprintf (results, "%d\n", result) > 0)
+		r=0;
+	else
+		r=-1;
+	fflush (results);
+
+	return r;
+}
diff --git a/main/Mac cli/ipc.dcl b/main/Mac cli/ipc.dcl
new file mode 100644
index 0000000..ce686ae
--- /dev/null
+++ b/main/Mac cli/ipc.dcl
@@ -0,0 +1,14 @@
+definition module ipc;
+
+//1.3
+from StdString import String;
+//3.1
+
+open_pipes :: !String !String -> Int;
+// int open_pipes (CleanString commands_name,CleanString results_name);
+get_command_length :: Int;
+// int get_command_length ();
+get_command :: !String -> Int;
+// int get_command (CleanString cleanString);
+send_result :: !Int -> Int;
+// int send_result (int result);
diff --git a/main/Mac cli/ipc.h b/main/Mac cli/ipc.h
new file mode 100644
index 0000000..99a070e
--- /dev/null
+++ b/main/Mac cli/ipc.h
@@ -0,0 +1,8 @@
+int open_pipes (CleanString commands_name, CleanString results_name);
+Clean (open_pipes :: String String -> Int)
+int get_command_length (void);
+Clean (get_command_length :: Int)
+int get_command (CleanString cleanString);
+Clean (get_command :: String -> Int)
+int send_result (int result);
+Clean (send_result :: Int -> Int)
diff --git a/main/Mac cli/ipc.icl b/main/Mac cli/ipc.icl
new file mode 100644
index 0000000..55ca927
--- /dev/null
+++ b/main/Mac cli/ipc.icl
@@ -0,0 +1,30 @@
+implementation module ipc;
+
+//1.3
+from StdString import String;
+//3.1
+
+
+open_pipes :: !String !String -> Int;
+open_pipes a0 a1 = code {
+	ccall open_pipes "SS:I"
+}
+// int open_pipes (CleanString commands_name,CleanString results_name);
+
+get_command_length :: Int;
+get_command_length  = code {
+	ccall get_command_length ":I"
+}
+// int get_command_length ();
+
+get_command :: !String -> Int;
+get_command a0 = code {
+	ccall get_command "S:I"
+}
+// int get_command (CleanString cleanString);
+
+send_result :: !Int -> Int;
+send_result a0 = code {
+	ccall send_result "I:I"
+}
+// int send_result (int result);
diff --git a/main/Mac cli/set_return_code.dcl b/main/Mac cli/set_return_code.dcl
new file mode 100644
index 0000000..e8ed7f8
--- /dev/null
+++ b/main/Mac cli/set_return_code.dcl
@@ -0,0 +1,9 @@
+definition module set_return_code;
+
+//1.3
+from StdString import String;
+//3.1
+
+:: *UniqueWorld :== World;
+set_return_code :: !Int !UniqueWorld -> UniqueWorld;
+// void set_return_code (int return_code);
diff --git a/main/Mac cli/set_return_code.icl b/main/Mac cli/set_return_code.icl
new file mode 100644
index 0000000..b4028f7
--- /dev/null
+++ b/main/Mac cli/set_return_code.icl
@@ -0,0 +1,18 @@
+implementation module set_return_code;
+
+import code from "set_return_code_c.o";
+
+import StdString;
+import StdDebug;
+
+:: *UniqueWorld :== World;
+
+set_return_code :: !Int !UniqueWorld -> UniqueWorld;
+set_return_code a0 a1 = code
+{
+	ccall set_return_code "I:V:A"
+	fill_a 0 1
+	pop_a 1
+}
+
+// void set_return_code (int return_code);
diff --git a/main/Mac cli/set_return_code_c.c b/main/Mac cli/set_return_code_c.c
new file mode 100644
index 0000000..a09e1ab
--- /dev/null
+++ b/main/Mac cli/set_return_code_c.c
@@ -0,0 +1,6 @@
+extern int return_code;
+
+void set_return_code (int code)
+{
+	return_code	=	code;
+}