-/* Copyright (C) 1995,1996 Free Software Foundation, Inc.
- *
- * This program 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 2, or (at your option)
- * any later version.
- *
- * This program 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * As a special exception, the Free Software Foundation gives permission
- * for additional uses of the text contained in its release of GUILE.
- *
- * The exception is that, if you link the GUILE library with other files
- * to produce an executable, this does not by itself cause the
- * resulting executable to be covered by the GNU General Public License.
- * Your use of that executable is in no way restricted on account of
- * linking the GUILE library code into it.
- *
- * This exception does not however invalidate any other reasons why
- * the executable file might be covered by the GNU General Public License.
- *
- * This exception applies only to the code released by the
- * Free Software Foundation under the name GUILE. If you copy
- * code from other Free Software Foundation releases into a copy of
- * GUILE, as the General Public License permits, the exception does
- * not apply to the code that you add in this way. To avoid misleading
- * anyone as to the status of such modified files, you must delete
- * this exception notice from them.
- *
- * If you write modifications of your own for GUILE, it is your choice
- * whether to permit this exception to apply to your modifications.
- * If you do not wish that, delete this exception notice.
- */
-\f
-
-#include <stdio.h>
-#include "_scm.h"
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
-\f
-extern int system();
-\f
-
-#ifndef _Windows
-SCM_PROC(s_system, "system", 1, 0, 0, scm_system);
-#ifdef __STDC__
-SCM
-scm_system(SCM cmd)
-#else
-SCM
-scm_system(cmd)
- SCM cmd;
-#endif
-{
- SCM_ASSERT(SCM_NIMP(cmd) && SCM_ROSTRINGP(cmd), cmd, SCM_ARG1, s_system);
- if (SCM_ROSTRINGP (cmd))
- cmd = scm_makfromstr (SCM_ROCHARS (cmd), SCM_ROLENGTH (cmd), 0);
- scm_ignore_signals();
-# ifdef AZTEC_C
- cmd = SCM_MAKINUM(Execute(SCM_ROCHARS(cmd), 0, 0));
-# else
- cmd = SCM_MAKINUM(0L+system(SCM_ROCHARS(cmd)));
-# endif
- scm_unignore_signals();
- return cmd;
-}
-#endif
-
-extern char *getenv();
-SCM_PROC (s_sys_getenv, "getenv", 1, 0, 0, scm_sys_getenv);
-#ifdef __STDC__
-SCM
-scm_sys_getenv(SCM nam)
-#else
-SCM
-scm_sys_getenv(nam)
- SCM nam;
-#endif
-{
- char *val;
- SCM_ASSERT(SCM_NIMP(nam) && SCM_ROSTRINGP(nam), nam, SCM_ARG1, s_sys_getenv);
- if (SCM_ROSTRINGP (nam))
- nam = scm_makfromstr (SCM_ROCHARS (nam), SCM_ROLENGTH (nam), 0);
- val = getenv(SCM_CHARS(nam));
- if (!val)
- SCM_SYSERROR (s_sys_getenv);
- return scm_makfromstr(val, (scm_sizet)strlen(val), 0);
-}
-
-#ifdef vms
-# define SYSTNAME "VMS"
-#endif
-#ifdef unix
-# define SYSTNAME "UNIX"
-#endif
-#ifdef MWC
-# define SYSTNAME "COHERENT"
-#endif
-#ifdef _Windows
-# define SYSTNAME "WINDOWS"
-#else
-# ifdef MSDOS
-# define SYSTNAME "MS-DOS"
-# endif
-#endif
-#ifdef __EMX__
-# define SYSTNAME "OS/2"
-#endif
-#ifdef __IBMC__
-# define SYSTNAME "OS/2"
-#endif
-#ifdef THINK_C
-# define SYSTNAME "THINKC"
-#endif
-#ifdef AMIGA
-# define SYSTNAME "AMIGA"
-#endif
-#ifdef atarist
-# define SYSTNAME "ATARIST"
-#endif
-#ifdef mach
-# define SYSTNAME "MACH"
-#endif
-#ifdef ARM_ULIB
-# define SYSTNAME "ACORN"
-#endif
-
-SCM_PROC(s_software_type, "software-type", 0, 0, 0, scm_software_type);
-#ifdef __STDC__
-SCM
-scm_software_type(void)
-#else
-SCM
-scm_software_type()
-#endif
-{
-#ifdef nosve
- return SCM_CAR(scm_intern("nosve", 5));
-#else
- return SCM_CAR(scm_intern(SYSTNAME, sizeof SYSTNAME/sizeof(char) -1));
-#endif
-}
-
-#ifdef __STDC__
-void
-scm_init_simpos (void)
-#else
-void
-scm_init_simpos ()
-#endif
-{
-#include "simpos.x"
-}
-
+/* Copyright (C) 1995, 1996, 1997, 1998, 2000, 2001, 2003, 2004, 2009,
+ * 2010, 2012, 2013, 2014 Free Software Foundation, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+
+\f
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <errno.h>
+#include <signal.h> /* for SIG constants */
+#include <stdlib.h> /* for getenv */
+#include <stdio.h>
+
+#include "libguile/_scm.h"
+
+#include "libguile/scmsigs.h"
+#include "libguile/strings.h"
+
+#include "libguile/validate.h"
+#include "libguile/simpos.h"
+#include "libguile/dynwind.h"
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#include <unistd.h>
+#if HAVE_SYS_WAIT_H
+# include <sys/wait.h>
+#endif
+
+#ifdef __MINGW32__
+# include <process.h> /* for spawnvp and friends */
+#endif
+
+#include "posix.h"
+
+\f
+extern int system();
+\f
+
+#ifdef HAVE_SYSTEM
+SCM_DEFINE (scm_system, "system", 0, 1, 0,
+ (SCM cmd),
+ "Execute @var{cmd} using the operating system's \"command\n"
+ "processor\". Under Unix this is usually the default shell\n"
+ "@code{sh}. The value returned is @var{cmd}'s exit status as\n"
+ "returned by @code{waitpid}, which can be interpreted using\n"
+ "@code{status:exit-val} and friends.\n"
+ "\n"
+ "If @code{system} is called without arguments, return a boolean\n"
+ "indicating whether the command processor is available.")
+#define FUNC_NAME s_scm_system
+{
+ int rv, eno;
+ char *c_cmd;
+
+ if (SCM_UNBNDP (cmd))
+ {
+ rv = system (NULL);
+ return scm_from_bool(rv);
+ }
+ SCM_VALIDATE_STRING (1, cmd);
+ errno = 0;
+ c_cmd = scm_to_locale_string (cmd);
+ rv = system (c_cmd);
+ eno = errno; free (c_cmd); errno = eno;
+ if (rv == -1 || (rv == 127 && errno != 0))
+ SCM_SYSERROR;
+ return scm_from_int (rv);
+}
+#undef FUNC_NAME
+#endif /* HAVE_SYSTEM */
+
+
+#ifdef HAVE_SYSTEM
+
+SCM_DEFINE (scm_system_star, "system*", 0, 0, 1,
+ (SCM args),
+"Execute the command indicated by @var{args}. The first element must\n"
+"be a string indicating the command to be executed, and the remaining\n"
+"items must be strings representing each of the arguments to that\n"
+"command.\n"
+"\n"
+"This function returns the exit status of the command as provided by\n"
+"@code{waitpid}. This value can be handled with @code{status:exit-val}\n"
+"and the related functions.\n"
+"\n"
+"@code{system*} is similar to @code{system}, but accepts only one\n"
+"string per-argument, and performs no shell interpretation. The\n"
+"command is executed using fork and execlp. Accordingly this function\n"
+"may be safer than @code{system} in situations where shell\n"
+"interpretation is not required.\n"
+"\n"
+"Example: (system* \"echo\" \"foo\" \"bar\")")
+#define FUNC_NAME s_scm_system_star
+{
+ if (scm_is_null (args))
+ SCM_WRONG_NUM_ARGS ();
+
+ if (scm_is_pair (args))
+ {
+ SCM oldint;
+ SCM sig_ign;
+ SCM sigint;
+ /* SIGQUIT is undefined on MS-Windows. */
+#ifdef SIGQUIT
+ SCM oldquit;
+ SCM sigquit;
+#endif
+#ifdef HAVE_FORK
+ int pid;
+#else
+ int status;
+#endif
+ char **execargv;
+
+ /* allocate before fork */
+ execargv = scm_i_allocate_string_pointers (args);
+
+ /* make sure the child can't kill us (as per normal system call) */
+ sig_ign = scm_from_ulong ((unsigned long) SIG_IGN);
+ sigint = scm_from_int (SIGINT);
+ oldint = scm_sigaction (sigint, sig_ign, SCM_UNDEFINED);
+#ifdef SIGQUIT
+ sigquit = scm_from_int (SIGQUIT);
+ oldquit = scm_sigaction (sigquit, sig_ign, SCM_UNDEFINED);
+#endif
+
+#ifdef HAVE_FORK
+ pid = fork ();
+ if (pid == 0)
+ {
+ /* child */
+ execvp (execargv[0], execargv);
+
+ /* Something went wrong. */
+ fprintf (stderr, "In execvp of %s: %s\n",
+ execargv[0], strerror (errno));
+
+ /* Exit directly instead of throwing, because otherwise this
+ process may keep on running. Use exit status 127, like
+ shells in this case, as per POSIX
+ <http://pubs.opengroup.org/onlinepubs/007904875/utilities/xcu_chap02.html#tag_02_09_01_01>. */
+ _exit (127);
+ }
+ else
+ {
+ /* parent */
+ int wait_result, status;
+
+ if (pid == -1)
+ SCM_SYSERROR;
+
+ SCM_SYSCALL (wait_result = waitpid (pid, &status, 0));
+ if (wait_result == -1)
+ SCM_SYSERROR;
+ scm_sigaction (sigint, SCM_CAR (oldint), SCM_CDR (oldint));
+ scm_sigaction (sigquit, SCM_CAR (oldquit), SCM_CDR (oldquit));
+
+ return scm_from_int (status);
+ }
+#else /* !HAVE_FORK */
+ status = spawnvp (P_WAIT, execargv[0], (const char * const *)execargv);
+ scm_sigaction (sigint, SCM_CAR (oldint), SCM_CDR (oldint));
+#ifdef SIGQUIT
+ scm_sigaction (sigquit, SCM_CAR (oldquit), SCM_CDR (oldquit));
+#endif
+
+ return scm_from_int (status);
+#endif /* !HAVE_FORK */
+ }
+ else
+ SCM_WRONG_TYPE_ARG (1, args);
+}
+#undef FUNC_NAME
+#endif /* HAVE_SYSTEM */
+
+
+SCM_DEFINE (scm_getenv, "getenv", 1, 0, 0,
+ (SCM nam),
+ "Looks up the string @var{nam} in the current environment. The return\n"
+ "value is @code{#f} unless a string of the form @code{NAME=VALUE} is\n"
+ "found, in which case the string @code{VALUE} is returned.")
+#define FUNC_NAME s_scm_getenv
+{
+ char *val;
+ char *var = scm_to_locale_string (nam);
+ val = getenv (var);
+ free (var);
+ return val ? scm_from_locale_string (val) : SCM_BOOL_F;
+}
+#undef FUNC_NAME
+
+/* Get an integer from an environment variable. */
+int
+scm_getenv_int (const char *var, int def)
+{
+ char *end = 0;
+ char *val = getenv (var);
+ long res = def;
+ if (!val)
+ return def;
+ res = strtol (val, &end, 10);
+ if (end == val)
+ return def;
+ return res;
+}
+
+/* simple exit, without unwinding the scheme stack or flushing ports. */
+SCM_DEFINE (scm_primitive_exit, "primitive-exit", 0, 1, 0,
+ (SCM status),
+ "Terminate the current process without unwinding the Scheme\n"
+ "stack. The exit status is @var{status} if supplied, otherwise\n"
+ "zero.")
+#define FUNC_NAME s_scm_primitive_exit
+{
+ int cstatus = 0;
+ if (!SCM_UNBNDP (status))
+ cstatus = scm_to_int (status);
+ exit (cstatus);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_primitive__exit, "primitive-_exit", 0, 1, 0,
+ (SCM status),
+ "Terminate the current process using the _exit() system call and\n"
+ "without unwinding the Scheme stack. The exit status is\n"
+ "@var{status} if supplied, otherwise zero.\n"
+ "\n"
+ "This function is typically useful after a fork, to ensure no\n"
+ "Scheme cleanups or @code{atexit} handlers are run (those\n"
+ "usually belonging in the parent rather than the child).")
+#define FUNC_NAME s_scm_primitive__exit
+{
+ int cstatus = 0;
+ if (!SCM_UNBNDP (status))
+ cstatus = scm_to_int (status);
+ _exit (cstatus);
+}
+#undef FUNC_NAME
+
+
+
+void
+scm_init_simpos ()
+{
+#include "libguile/simpos.x"
+}
+
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
HCoop / bpt / guile.git / blobdiff