#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
+#include <unistd.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
+#include <assert.h>
+
#ifdef HAVE_ERR_H
# include <err.h>
#endif
/*
- * Compiler specific stuff
+ * Compiler-specific stuff
*/
#ifndef __GNUC_PREREQ
# if defined __GNUC__ && defined __GNUC_MINOR__
# define __must_be_array(a) \
UL_BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(__typeof__(a), __typeof__(&a[0])))
-# define ignore_result(x) ({ \
+# define ignore_result(x) __extension__ ({ \
__typeof__(x) __dummy __attribute__((__unused__)) = (x); (void) __dummy; \
})
*/
#ifndef __ul_alloc_size
# if __GNUC_PREREQ (4, 3)
-# define __ul_alloc_size(s) __attribute__((alloc_size(s)))
+# define __ul_alloc_size(s) __attribute__((alloc_size(s), warn_unused_result))
# else
# define __ul_alloc_size(s)
# endif
#ifndef __ul_calloc_size
# if __GNUC_PREREQ (4, 3)
-# define __ul_calloc_size(n, s) __attribute__((alloc_size(n, s)))
+# define __ul_calloc_size(n, s) __attribute__((alloc_size(n, s), warn_unused_result))
# else
# define __ul_calloc_size(n, s)
# endif
#endif
-/* Force a compilation error if condition is true, but also produce a
+/*
+ * Force a compilation error if condition is true, but also produce a
* result (of value 0 and type size_t), so the expression can be used
- * e.g. in a structure initializer (or where-ever else comma expressions
+ * e.g. in a structure initializer (or wherever else comma expressions
* aren't permitted).
*/
-#define UL_BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
+#define UL_BUILD_BUG_ON_ZERO(e) __extension__ (sizeof(struct { int:-!!(e); }))
#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))
#ifndef ARRAY_SIZE
#endif
#ifndef min
-# define min(x, y) ({ \
+# define min(x, y) __extension__ ({ \
__typeof__(x) _min1 = (x); \
__typeof__(y) _min2 = (y); \
(void) (&_min1 == &_min2); \
#endif
#ifndef max
-# define max(x, y) ({ \
+# define max(x, y) __extension__ ({ \
__typeof__(x) _max1 = (x); \
__typeof__(y) _max2 = (y); \
(void) (&_max1 == &_max2); \
_max1 > _max2 ? _max1 : _max2; })
#endif
+#ifndef cmp_numbers
+# define cmp_numbers(x, y) __extension__ ({ \
+ __typeof__(x) _a = (x); \
+ __typeof__(y) _b = (y); \
+ (void) (&_a == &_b); \
+ _a == _b ? 0 : _a > _b ? 1 : -1; })
+#endif
+
#ifndef offsetof
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
#endif
#ifndef container_of
-#define container_of(ptr, type, member) ({ \
+#define container_of(ptr, type, member) __extension__ ({ \
const __typeof__( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
#endif
* Fallback defines for old versions of glibc
*/
#include <fcntl.h>
+
+#ifdef O_CLOEXEC
+#define UL_CLOEXECSTR "e"
+#else
+#define UL_CLOEXECSTR ""
+#endif
+
#ifndef O_CLOEXEC
#define O_CLOEXEC 0
#endif
+#ifdef __FreeBSD_kernel__
+#ifndef F_DUPFD_CLOEXEC
+#define F_DUPFD_CLOEXEC 17 /* Like F_DUPFD, but FD_CLOEXEC is set */
+#endif
+#endif
+
+
#ifndef AI_ADDRCONFIG
#define AI_ADDRCONFIG 0x0020
#endif
#define IUTF8 0040000
#endif
+#if 0
+/*
+ * MAXHOSTNAMELEN replacement
+ */
+static inline size_t get_hostname_max(void)
+{
+ long len = sysconf(_SC_HOST_NAME_MAX);
+
+ if (0 < len)
+ return len;
+
+#ifdef MAXHOSTNAMELEN
+ return MAXHOSTNAMELEN;
+#elif HOST_NAME_MAX
+ return HOST_NAME_MAX;
+#endif
+ return 64;
+}
+
+/*
+ * The usleep function was marked obsolete in POSIX.1-2001 and was removed
+ * in POSIX.1-2008. It was replaced with nanosleep() that provides more
+ * advantages (like no interaction with signals and other timer functions).
+ */
+#include <time.h>
+
+static inline int xusleep(useconds_t usec)
+{
+#ifdef HAVE_NANOSLEEP
+ struct timespec waittime = {
+ .tv_sec = usec / 1000000L,
+ .tv_nsec = (usec % 1000000L) * 1000
+ };
+ return nanosleep(&waittime, NULL);
+#elif defined(HAVE_USLEEP)
+ return usleep(usec);
+#else
+# error "System with usleep() or nanosleep() required!"
+#endif
+}
+#endif
+
/*
* Constant strings for usage() functions. For more info see
- * Documentation/howto-usage-function.txt and sys-utils/arch.c
+ * Documentation/howto-usage-function.txt and disk-utils/delpart.c
*/
#define USAGE_HEADER _("\nUsage:\n")
#define USAGE_OPTIONS _("\nOptions:\n")
-#define USAGE_SEPARATOR _("\n")
+#define USAGE_SEPARATOR "\n"
#define USAGE_HELP _(" -h, --help display this help and exit\n")
#define USAGE_VERSION _(" -V, --version output version information and exit\n")
#define USAGE_MAN_TAIL(_man) _("\nFor more details see %s.\n"), _man
#define UL_SCNsA "%as"
#endif
+/*
+ * seek stuff
+ */
+#ifndef SEEK_DATA
+# define SEEK_DATA 3
+#endif
+#ifndef SEEK_HOLE
+# define SEEK_HOLE 4
+#endif
+
+
+/*
+ * Macros to convert #define'itions to strings, for example
+ * #define XYXXY 42
+ * printf ("%s=%s\n", stringify(XYXXY), stringify_value(XYXXY));
+ */
+#define stringify_value(s) stringify(s)
+#define stringify(s) #s
+
+/*
+ * UL_ASAN_BLACKLIST is a macro to tell AddressSanitizer (a compile-time
+ * instrumentation shipped with Clang and GCC) to not instrument the
+ * annotated function. Furthermore, it will prevent the compiler from
+ * inlining the function because inlining currently breaks the blacklisting
+ * mechanism of AddressSanitizer.
+ */
+#if defined(__has_feature)
+# if __has_feature(address_sanitizer)
+# define UL_ASAN_BLACKLIST __attribute__((noinline)) __attribute__((no_sanitize_memory)) __attribute__((no_sanitize_address))
+# else
+# define UL_ASAN_BLACKLIST /* nothing */
+# endif
+#else
+# define UL_ASAN_BLACKLIST /* nothing */
+#endif
+
#endif /* UTIL_LINUX_C_H */
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