"

 COPYRIGHT (c) 1988 by Claus Gittinger

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

'From Smalltalk/X, Version:2.10.8 on 29-dec-1995 at 00:13:58'                   !

Object subclass:#OperatingSystem

	instanceVariableNames:''

	classVariableNames:'HostName DomainName LastErrorNumber LastExecStatus OSSignals

		SlowFork ForkFailed ErrorSignal AccessDeniedErrorSignal

		FileNotFoundErrorSignal

		LocaleInfo'

	poolDictionaries:''

	category:'System-Support'

!

!OperatingSystem primitiveDefinitions!

%{

#define UNIX_LIKE

# ifndef MSDOS_LIKE

#  define MSDOS_LIKE

# endif

# undef UNIX_LIKE

#endif

#if defined(transputer)

# undef MSDOS_LIKE

# undef UNIX_LIKE

#endif

#if defined(_AIX)

# ifndef WANT_REALPATH

#  define WANT_REALPATH

# endif

# ifndef WANT_SYSTEM

#  define WANT_SYSTEM

# endif

#endif

#ifdef LINUX

# ifndef WANT_SYSTEM

#  define WANT_SYSTEM

# endif

# define WANT_SHM

#endif

#ifdef IRIX5

# define WANT_SYSTEM

#endif

#ifdef ultrix

# define WANT_SYSTEM

#endif

#ifdef hpux

# define WANT_SYSTEM

#endif

#if defined(SYSV4) && defined(i386) /* e.g. unixware */

# define WANT_SYSTEM

#endif

#ifdef WANT_REALPATH

# include <sys/param.h>

# define _SYS_PARAM_H_INCLUDED_

# include <errno.h>

# define _ERRNO_H_INCLUDED_

# include <sys/stat.h>

# define _SYS_STAT_H_INCLUDED_

#endif /* WANT_REALPATH */

#ifdef WANT_SHM

extern int shmctl(), shmget(), shmdt();

extern char * shmat();

# include <sys/types.h>

# define _SYS_TYPES_H_INCLUDED_

# include <sys/ipc.h>

# define _SYS_IPC_H_INCLUDED_

# include <sys/shm.h>

# define _SYS_SHM_H_INCLUDED_

#endif /* WANT_SHM */

#ifdef IRIX5

# include <sys/syssgi.h>

#endif

#ifdef transputer

# define unlink(f)      ((remove(f) == 0) ? 0 : -1)

# ifdef SYSV

#  if ! defined(sco3_2)

#  endif

#  if defined(isc3_2) || defined(sco3_2)

#  endif

#  if !defined(isc3_2)

#   if defined(PCS) && defined(mips)

#    include "/usr/include/bsd/sys/time.h"

#    include "/usr/include/sys/time.h"

#   else

#   endif

#  endif

#  if defined(isc3_2)

#   include <sys/bsdtypes.h>

#  endif

# else /* not SYSV */

#  ifdef MSDOS_LIKE

# endif /* not SYSV */

# ifdef aix

# endif /* aix */

# ifndef MSDOS_LIKE

#  include <pwd.h>

#  include <grp.h>

# endif

# if defined(LINUX)

#  define HAS_LOCALECONV

# endif

# if defined (HAS_LOCALECONV)

#  ifndef _LOCALE_H_INCLUDED_

#   include <locale.h>

#   define _LOCALE_H_INCLUDED_

#  endif

# endif

/* 

 * posix systems should define these ... 

 * but on some (older) systems, they are not.

 */

# ifndef S_IXUSR

#  ifdef S_IEXEC

#   define S_IXUSR S_IEXEC

#   define S_IXGRP (S_IEXEC>>3)

#   define S_IXOTH (S_IEXEC>>6)

#  endif

# endif

# ifndef S_IXUSR

#  define S_IXUSR 0100

#  define S_IXGRP 0010

#  define S_IXOTH 0001

# endif

# ifndef S_IRUSR

#  define S_IRUSR 0400

#  define S_IRGRP 0040

#  define S_IROTH 0004

# endif

# ifndef S_IWUSR

#  define S_IWUSR 0200

#  define S_IWGRP 0020

#  define S_IWOTH 0002

# endif

# ifndef MAXPATHLEN

#  ifndef MSDOS_LIKE

#   include <sys/param.h>

#  endif

#  ifndef MAXPATHLEN

#   ifdef FILENAME_MAX  /* i.e. MSDOS_LIKE */

#    define MAXPATHLEN FILENAME_MAX

#   else

#    define MAXPATHLEN 1024

#   endif

#  endif

# endif

# if defined(HAS_UNAME)

#  include <sys/utsname.h>

# endif

# if defined(SYSV4)

#  include <stropts.h>

# endif

/*

 * sigaction dummies (you won't believe these call themself ``POSIX'' systems ...)

 */

# ifndef SA_RESTART

#  define SA_RESTART    0

# endif

# ifndef SA_SIGINFO

#  define SA_SIGINFO    0

# endif

# if defined(HAS_WAITPID) || defined(HAS_WAIT3)

#  include <sys/wait.h>

# endif

#endif /* ! transputer */

/*

 * on some systems errno is a macro ... check for it here

 */

#ifndef errno

 extern errno;

#endif

/*

 * some (old ?) systems do not define this ...

 */

#if !defined(R_OK) && !defined(_AIX)

# define R_OK    4       /* Test for Read permission */ 

# define W_OK    2       /* Test for Write permission */

# define X_OK    1       /* Test for eXecute permission */

# define F_OK    0       /* Test for existence of File */

#endif

%}

! !

!OperatingSystem primitiveFunctions!

%{

/*

 * some systems' system() is broken in that it does not correctly 

 * handle EINTR and returns failure even though it actually succeeded. 

 * (LINUX is one of them)

 * Here is a fixed version. If you encounter EINTR returns from

 * OperatingSystem>>executeCommand, you ought to define WANT_SYSTEM

 * in the xxxIntern.h file to get this fixed version.

 *

 * As an added BONUS, this system() enables interrupts while waiting

 * for the child which enables other threads to continue.

 * (i.e. it is RT safe)

 */

#if defined(WANT_SYSTEM)

/* # define DPRINTF(x)     printf x */

# define DPRINTF(x)     /* nothing */

# ifndef _STDDEF_H_INCLUDED_

#  include <stddef.h>

#  define _STDDEF_H_INCLUDED_

# endif

# ifndef _STDLIB_H_INCLUDED_

#  include <stdlib.h>

#  define _STDLIB_H_INCLUDED_

# endif

# ifndef _UNISTD_H_INCLUDED_

#  include <unistd.h>

#  define _UNISTD_H_INCLUDED_

# endif

# ifndef _SYS_WAIT_H_INCLUDED

#  include <sys/wait.h>

#  define _SYS_WAIT_H_INCLUDED

# endif

# ifndef _SIGNAL_H_INCLUDED_

#  include <signal.h>

#  define _SIGNAL_H_INCLUDED_

# endif

# ifndef _SYS_TYPES_H_INCLUDED_

#  include <sys/types.h>

#  define _SYS_TYPES_H_INCLUDED_

# endif

# if (!defined(HAVE_GNU_LD) && !defined (__ELF__)) || !defined(LINUX)

#  define       __environ       environ

#  if !defined(LINUX)

#   define      __sigemptyset   sigemptyset

#   define      __sigaction     sigaction

#   define      __sigaddset     sigaddset

#   define      __sigprocmask   sigprocmask

#   define      __execve        execve

#   define      __wait          wait

#   define      __waitpid       waitpid

#   if defined(HAS_VFORK)

#    define     FORK            vfork

#   else

#    define     FORK            fork

#   endif

#  endif /* ! LINUX */

   extern char **environ;

# endif

# define        SHELL_PATH      "/bin/sh"       /* Path of the shell.  */

# define        SHELL_NAME      "sh"            /* Name to give it.  */

# ifndef        FORK

#  define       FORK    __fork

# endif

# ifndef CONST

#  ifdef __GNUC__

#   define CONST const

#  else

#   define CONST /* nothing */

#  endif

# endif

static int

mySystem(line)

    register CONST char *line;

{

    int status, save;

    pid_t pid;

    struct sigaction sa, intr, quit;

    sigset_t block, omask;

    if (line == NULL)

	return -1;

    sa.sa_handler = SIG_IGN;

    sa.sa_flags = 0;

    __sigemptyset (&sa.sa_mask);

    if (__sigaction (SIGINT, &sa, &intr) < 0) {

	DPRINTF(("1: errno=%d\n", errno));

	return -1;

    }

    if (__sigaction (SIGQUIT, &sa, &quit) < 0) {

	save = errno;

	(void) __sigaction (SIGINT, &intr, (struct sigaction *) NULL);

	errno = save;

	DPRINTF(("2: errno=%d\n", errno));

	return -1;

    }

    __sigemptyset (&block);

    __sigaddset (&block, SIGCHLD);

    save = errno;

    if (__sigprocmask(SIG_BLOCK, &block, &omask) < 0) {