3 files changed, 227 insertions, 0 deletions
diff --git a/src/common/open_stdxxx.h b/src/common/open_stdxxx.h
new file mode 100644
index 00000000..d0ac15af
--- /dev/null
+++ b/src/common/open_stdxxx.h
@@ -0,0 +1,50 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       open_stdxxx.h
+/// \brief      Make sure that file descriptors 0, 1, and 2 are open
+//
+//  This code has been put into the public domain.
+//
+//  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.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef OPEN_STDXXX_H
+#define OPEN_STDXXX_H
+
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+
+static void
+open_stdxxx(int status)
+{
+	for (int i = 0; i <= 2; ++i) {
+		// We use fcntl() to check if the file descriptor is open.
+		if (fcntl(i, F_GETFD) == -1 && errno == EBADF) {
+			// With stdin, we could use /dev/full so that
+			// writing to stdin would fail. However, /dev/full
+			// is Linux specific, and if the program tries to
+			// write to stdin, there's already a problem anyway.
+			const int fd = open("/dev/null", O_NOCTTY
+					| (i == 0 ? O_WRONLY : O_RDONLY));
+
+			if (fd != i) {
+				// Something went wrong. Exit with the
+				// exit status we were given. Don't try
+				// to print an error message, since stderr
+				// may very well be non-existent. This
+				// error should be extremely rare.
+				(void)close(fd);
+				exit(status);
+			}
+		}
+	}
+
+	return;
+}
+
+#endif
diff --git a/src/common/physmem.h b/src/common/physmem.h
new file mode 100644
index 00000000..1d40b299
--- /dev/null
+++ b/src/common/physmem.h
@@ -0,0 +1,77 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       physmem.h
+/// \brief      Get the amount of physical memory
+//
+//  This code has been put into the public domain.
+//
+//  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.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef PHYSMEM_H
+#define PHYSMEM_H
+
+#ifdef HAVE_CONFIG_H
+#	include <config.h>
+#endif
+
+#include <sys/types.h>
+#include <inttypes.h>
+
+#ifdef HAVE_LIMITS_H
+#	include <limits.h>
+#endif
+
+#if defined(HAVE_PHYSMEM_SYSCTL) || defined(HAVE_NCPU_SYSCTL)
+#	ifdef HAVE_SYS_PARAM_H
+#		include <sys/param.h>
+#	endif
+#	ifdef HAVE_SYS_SYSCTL_H
+#		include <sys/sysctl.h>
+#	endif
+#endif
+
+
+/// \brief      Get the amount of physical memory in bytes
+///
+/// \return     Amount of physical memory in bytes. On error, zero is
+///             returned.
+static inline uint64_t
+physmem(void)
+{
+	uint64_t ret = 0;
+
+#if defined(HAVE_PHYSMEM_SYSCONF)
+	const long pagesize = sysconf(_SC_PAGESIZE);
+	const long pages = sysconf(_SC_PHYS_PAGES);
+	if (pagesize != -1 || pages != -1)
+		// According to docs, pagesize * pages can overflow.
+		// Simple case is 32-bit box with 4 GiB or more RAM,
+		// which may report exactly 4 GiB of RAM, and "long"
+		// being 32-bit will overflow. Casting to uint64_t
+		// hopefully avoids overflows in the near future.
+		ret = (uint64_t)(pagesize) * (uint64_t)(pages);
+
+#elif defined(HAVE_PHYSMEM_SYSCTL)
+	int name[2] = { CTL_HW, HW_PHYSMEM };
+	unsigned long mem;
+	size_t mem_ptr_size = sizeof(mem);
+	if (!sysctl(name, 2, &mem, &mem_ptr_size, NULL, NULL)) {
+		// Some systems use unsigned int as the "return value".
+		// This makes a difference on 64-bit boxes.
+		if (mem_ptr_size != sizeof(mem)) {
+			if (mem_ptr_size == sizeof(unsigned int))
+				ret = *(unsigned int *)(&mem);
+		} else {
+			ret = mem;
+		}
+	}
+#endif
+
+	return ret;
+}
+
+#endif
diff --git a/src/common/sysdefs.h b/src/common/sysdefs.h
new file mode 100644
index 00000000..b4ba8a56
--- /dev/null
+++ b/src/common/sysdefs.h
@@ -0,0 +1,100 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       sysdefs.h
+/// \brief      Common includes, definitions, system-specific things etc.
+///
+/// This file is used also by the lzma command line tool, that's why this
+/// file is separate from common.h.
+//
+//  Copyright (C) 2007 Lasse Collin
+//
+//  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 2.1 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.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_SYSDEFS_H
+#define LZMA_SYSDEFS_H
+
+//////////////
+// Includes //
+//////////////
+
+#ifdef HAVE_CONFIG_H
+#	include <config.h>
+#endif
+
+#include "lzma.h"
+
+#include <stdlib.h>
+
+#ifdef HAVE_STDBOOL_H
+#	include <stdbool.h>
+#else
+#	if ! HAVE__BOOL
+typedef unsigned char _Bool;
+#	endif
+#	define bool _Bool
+#	define false 0
+#	define true 1
+#	define __bool_true_false_are_defined 1
+#endif
+
+#ifdef HAVE_ASSERT_H
+#	include <assert.h>
+#else
+#	ifdef NDEBUG
+#		define assert(x)
+#	else
+		// TODO: Pretty bad assert() macro.
+#		define assert(x) (!(x) && abort())
+#	endif
+#endif
+
+#ifdef HAVE_STRING_H
+#	include <string.h>
+#endif
+
+#ifdef HAVE_STRINGS_H
+#	include <strings.h>
+#endif
+
+#ifdef HAVE_MEMORY_H
+#	include <memory.h>
+#endif
+
+
+////////////
+// Macros //
+////////////
+
+#ifndef HAVE_MEMCPY
+#	define memcpy(dest, src, n) bcopy(src, dest, n)
+#endif
+
+#ifndef HAVE_MEMMOVE
+#	define memmove(dest, src, n) bcopy(src, dest, n)
+#endif
+
+#ifdef HAVE_MEMSET
+#	define memzero(s, n) memset(s, 0, n)
+#else
+#	define memzero(s, n) bzero(s, n)
+#endif
+
+#ifndef MIN
+#	define MIN(x, y) ((x) < (y) ? (x) : (y))
+#endif
+
+#ifndef MAX
+#	define MAX(x, y) ((x) > (y) ? (x) : (y))
+#endif
+
+#endif