2002-05-17 Jeff Johnston <jjohnstn@redhat.com>

	* Makefile.am: Copy and install headers from sys/machine/include
	directory.  Also pass $toollibdir to lower-level directories.
	* Makefile.in: Regenerated.
	* libc/include/stdio.h[!_REENT_ONLY]: Change stdin, stdout, and
	stderr to use _REENT macro instead of _impure_ptr directly.
	* libc/include/sys/config.h[__i386__][__linux__]: Define
	__DYNAMIC_REENT__.
	* libc/include/sys/reent.h[!_REENT_ONLY]: Change _REENT macro to be
	call to __getreent() function if !__SINGLE_THREAD__ and
	__DYNAMIC_REENT__ is set.
	* libc/reent/Makefile.am: Add support for getreent.c.
	* libc/reent/Makefile.in: Regenerated.
	* libc/string/strerror.c: Add check if EOPNOTSUPP and ENOTSUP are same.
	* libc/sys/linux/Makefile.am: Add support for new files.
	* libc/sys/linux/configure.in: Add $EXTRA_DIRS variable.
	* libc/sys/linux/Makefile.in: Regenerated.
	* libc/sys/linux/configure: Ditto.
	* libc/sys/linux/io.c: Add poll syscall.  Also weak-alias
	__close, __read, __write, __poll, __open, __lseek, __fcntl from
	their __libc_ counterparts.
	* libc/sys/linux/io64.c: Add __libc_ prefix to lseek64 and open64
	and weak-alias to regular names.
	* libc/sys/linux/pread64.c: Rename to __libc_pread64 and weak-alias
	to pread64 and __pread64.
	* libc/sys/linux/process.c: Weak_alias __libc_getpid to __getpid.
	* libc/sys/linux/pwrite64.c: Rename to __libc_pwrite64 and
	weak-alias to pwrite64.
	* libc/sys/linux/sched.c: Weak-alias __libc_sched_getparam,
	__libc_sched_getscheduler, __libc_sched_get_priority_max,
	__libc_sched_get_priority_min, and __libc_sched_setschedule to
	name with __ instead of __libc_.
	* libc/sys/linux/siglongjmp.c: Include <machine/weakalias.h>.
	Rename siglongjmp to __libc_siglongjmp and weak-alias to siglongjmp.
	Call __libc_longjmp instead of longjmp, from __libc_siglongjmp.
	* libc/sys/linux/signal.c: Rename raise to __libc_raise and weak-alias
	to raise.
	* libc/sys/linux/socket.c: Weak-alias __libc_connect to __connect and
	__libc_send to __send.
	* libc/sys/linux/time.c: Weak-alias __libc_gettimeofday to
	__gettimeofday.
	* libc/sys/linux/wait.c: Rename wait to __libc_wait and weak-alias
	it to wait.  Rename wait3 to __libc_wait3 and weak-alias it to wait3.
	* libc/sys/linux/include/setjmp.h: Use __jmp_buf in sigjmp_buf
	type and typedef __jmp_buf to jmp_buf.
	* libc/sys/linux/machine/i386/Makefile.am: Add syscalls.c and
	setjmp.S.
	* libc/sys/linux/machine/i386/Makefile.in: Regenerated.
	* libc/sys/linux/machine/i386/crt0.c: Add support to clear .bss
	section.
	* libc/sys/linux/machine/i386/socketcall.h: Change to use __libc_
	prefix for function macros and then use weak_alias() to regular names.
	* libc/sys/linux/machine/i386/syscall.h: Ditto.
	* libc/sys/linux/sys/errno.h: Define EOPNOTSUP to be ENOTSUP.
	* libc/sys/linux/sys/stdio.h: Define _flockfile and _funlockfile
	to be flockfile() and funlockfile() respectively.
	* libc/sys/linux/sys/types.h
	* libc/reent/getreent.c: New file.
	* libc/sys/linux/flockfile.c: Ditto.
	* libc/sys/linux/funlockfile.c: Ditto.
	* libc/sys/linux/getreent.c: Ditto.
	* libc/sys/linux/pread.c: Ditto.
	* libc/sys/linux/pwrite.c: Ditto.
	* libc/sys/linux/raise.c: Ditto.
	* libc/sys/linux/system.c: Ditto.
	* libc/sys/linux/tcdrain.c: Ditto.
	* libc/sys/linux/machine/i386/i386mach.h: Ditto.
	* libc/sys/linux/machine/i386/setjmp.S: Ditto.
	* libc/sys/linux/machine/i386/syscalls.c: Ditto.
	* libc/sys/linux/machine/i386/weakalias.h: Ditto.
	* libc/sys/linux/machine/i386/include/setjmp.h: Ditto.

1 files changed, 158 insertions, 0 deletions

diff --git a/newlib/libc/sys/linux/system.c b/newlib/libc/sys/linux/system.c
new file mode 100644
index 000000000..f8edfbf63
--- /dev/null
+++ b/newlib/libc/sys/linux/system.c
@@ -0,0 +1,158 @@
+/* Copyright (C) 1991-1999, 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C 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 2.1 of the License, or (at your option) any later version.
+
+   The GNU C 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 the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/wait.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <errno.h>
+#include <machine/weakalias.h>
+
+
+#ifndef	HAVE_GNU_LD
+#define	__environ	environ
+#endif
+
+#define	SHELL_PATH	"/bin/sh"	/* Path of the shell.  */
+#define	SHELL_NAME	"sh"		/* Name to give it.  */
+
+/* Execute LINE as a shell command, returning its status.  */
+int
+__libc_system (const char *line)
+{
+  int status, save;
+  pid_t pid;
+  struct sigaction sa, intr, quit;
+#ifndef WAITPID_CANNOT_BLOCK_SIGCHLD
+  sigset_t block, omask;
+#endif
+
+  if (line == NULL)
+    /* Check that we have a command processor available.  It might
+       not be available after a chroot(), for example.  */
+    return __libc_system ("exit 0") == 0;
+
+  sa.sa_handler = SIG_IGN;
+  sa.sa_flags = 0;
+  sigemptyset (&sa.sa_mask);
+
+  if (sigaction (SIGINT, &sa, &intr) < 0)
+    return -1;
+  if (sigaction (SIGQUIT, &sa, &quit) < 0)
+    {
+      save = errno;
+      (void) sigaction (SIGINT, &intr, (struct sigaction *) NULL);
+      errno = save;
+      return -1;
+    }
+
+#ifndef WAITPID_CANNOT_BLOCK_SIGCHLD
+
+/* SCO 3.2v4 has a bug where `waitpid' will never return if SIGCHLD is
+   blocked.  This makes it impossible for `system' to be implemented in
+   compliance with POSIX.2-1992.  They have acknowledged that this is a bug
+   but I have not seen nor heard of any forthcoming fix.  */
+
+  sigemptyset (&block);
+  sigaddset (&block, SIGCHLD);
+  save = errno;
+  if (sigprocmask (SIG_BLOCK, &block, &omask) < 0)
+    {
+      if (errno == ENOSYS)
+	errno = save;
+      else
+	{
+	  save = errno;
+	  (void) sigaction (SIGINT, &intr, (struct sigaction *) NULL);
+	  (void) sigaction (SIGQUIT, &quit, (struct sigaction *) NULL);
+	  errno = save;
+	  return -1;
+	}
+    }
+# define UNBLOCK sigprocmask (SIG_SETMASK, &omask, (sigset_t *) NULL)
+#else
+# define UNBLOCK 0
+#endif
+
+  pid = fork ();
+  if (pid == (pid_t) 0)
+    {
+      /* Child side.  */
+      const char *new_argv[4];
+      new_argv[0] = SHELL_NAME;
+      new_argv[1] = "-c";
+      new_argv[2] = line;
+      new_argv[3] = NULL;
+
+      /* Restore the signals.  */
+      (void) sigaction (SIGINT, &intr, (struct sigaction *) NULL);
+      (void) sigaction (SIGQUIT, &quit, (struct sigaction *) NULL);
+      (void) UNBLOCK;
+
+      /* Exec the shell.  */
+      (void) execve (SHELL_PATH, (char *const *) new_argv, __environ);
+      _exit (127);
+    }
+  else if (pid < (pid_t) 0)
+    /* The fork failed.  */
+    status = -1;
+  else
+    /* Parent side.  */
+    {
+#ifdef	NO_WAITPID
+      pid_t child;
+      do
+	{
+	  child = wait (&status);
+	  if (child <= -1 && errno != EINTR)
+	    {
+	      status = -1;
+	      break;
+	    }
+	  /* Note that pid cannot be <= -1 and therefore the loop continues
+	     when wait returned with EINTR.  */
+	}
+      while (child != pid);
+#else
+      int n;
+
+      do
+	n = waitpid (pid, &status, 0);
+      while (n == -1 && errno == EINTR);
+
+      if (n != pid)
+	status = -1;
+#endif
+    }
+
+  save = errno;
+  if ((sigaction (SIGINT, &intr, (struct sigaction *) NULL) |
+       sigaction (SIGQUIT, &quit, (struct sigaction *) NULL) |
+       UNBLOCK) != 0)
+    {
+      if (errno == ENOSYS)
+	errno = save;
+      else
+	return -1;
+    }
+
+  return status;
+}
+weak_alias (__libc_system, system)