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authorLasse Collin <lasse.collin@tukaani.org>2007-12-09 00:42:33 +0200
committerLasse Collin <lasse.collin@tukaani.org>2007-12-09 00:42:33 +0200
commit5d018dc03549c1ee4958364712fb0c94e1bf2741 (patch)
tree1b211911fb33fddb3f04b77f99e81df23623ffc4 /src/common
downloadxz-5d018dc03549c1ee4958364712fb0c94e1bf2741.tar.xz
Imported to git.
Diffstat (limited to 'src/common')
-rw-r--r--src/common/open_stdxxx.h50
-rw-r--r--src/common/physmem.h77
-rw-r--r--src/common/sysdefs.h100
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