diff options
Diffstat (limited to 'getopt-ul/c.h')
| -rw-r--r-- | getopt-ul/c.h | 436 |
1 files changed, 0 insertions, 436 deletions
diff --git a/getopt-ul/c.h b/getopt-ul/c.h deleted file mode 100644 index 64cf5c3..0000000 --- a/getopt-ul/c.h +++ /dev/null @@ -1,436 +0,0 @@ -/* - * Fundamental C definitions. - * - * No copyright is claimed. This code is in the public domain; do with - * it what you wish. - */ -#ifndef UTIL_LINUX_C_H -#define UTIL_LINUX_C_H - -#include <limits.h> -#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 - -#ifdef HAVE_SYS_SYSMACROS_H -# include <sys/sysmacros.h> /* for major, minor */ -#endif - -#ifndef LOGIN_NAME_MAX -# define LOGIN_NAME_MAX 256 -#endif - -#ifndef NAME_MAX -# define NAME_MAX PATH_MAX -#endif - -/* - * __GNUC_PREREQ is deprecated in favour of __has_attribute() and - * __has_feature(). The __has macros are supported by clang and gcc>=5. - */ -#ifndef __GNUC_PREREQ -# if defined __GNUC__ && defined __GNUC_MINOR__ -# define __GNUC_PREREQ(maj, min) \ - ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) -# else -# define __GNUC_PREREQ(maj, min) 0 -# endif -#endif - -#ifdef __GNUC__ - -/* &a[0] degrades to a pointer: a different type from an array */ -# define __must_be_array(a) \ - UL_BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(__typeof__(a), __typeof__(&a[0]))) - -# define ignore_result(x) __extension__ ({ \ - __typeof__(x) __dummy __attribute__((__unused__)) = (x); (void) __dummy; \ -}) - -#else /* !__GNUC__ */ -# define __must_be_array(a) 0 -# define __attribute__(_arg_) -# define ignore_result(x) ((void) (x)) -#endif /* !__GNUC__ */ - -/* - * It evaluates to 1 if the attribute/feature is supported by the current - * compilation target. Fallback for old compilers. - */ -#ifndef __has_attribute - #define __has_attribute(x) 0 -#endif - -#ifndef __has_feature - #define __has_feature(x) 0 -#endif - -/* - * Function attributes - */ -#ifndef __ul_alloc_size -# if (__has_attribute(alloc_size) && __has_attribute(warn_unused_result)) || __GNUC_PREREQ (4, 3) -# define __ul_alloc_size(s) __attribute__((alloc_size(s), warn_unused_result)) -# else -# define __ul_alloc_size(s) -# endif -#endif - -#ifndef __ul_calloc_size -# if (__has_attribute(alloc_size) && __has_attribute(warn_unused_result)) || __GNUC_PREREQ (4, 3) -# define __ul_calloc_size(n, s) __attribute__((alloc_size(n, s), warn_unused_result)) -# else -# define __ul_calloc_size(n, s) -# endif -#endif - -#if __has_attribute(returns_nonnull) || __GNUC_PREREQ (4, 9) -# define __ul_returns_nonnull __attribute__((returns_nonnull)) -#else -# define __ul_returns_nonnull -#endif - -/* - * 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 wherever else comma expressions - * aren't permitted). - */ -#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 -# define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr)) -#endif - -#ifndef PATH_MAX -# define PATH_MAX 4096 -#endif - -#ifndef TRUE -# define TRUE 1 -#endif - -#ifndef FALSE -# define FALSE 0 -#endif - -#ifndef min -# define min(x, y) __extension__ ({ \ - __typeof__(x) _min1 = (x); \ - __typeof__(y) _min2 = (y); \ - (void) (&_min1 == &_min2); \ - _min1 < _min2 ? _min1 : _min2; }) -#endif - -#ifndef max -# 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 - -/* - * container_of - cast a member of a structure out to the containing structure - * @ptr: the pointer to the member. - * @type: the type of the container struct this is embedded in. - * @member: the name of the member within the struct. - */ -#ifndef container_of -#define container_of(ptr, type, member) __extension__ ({ \ - const __typeof__( ((type *)0)->member ) *__mptr = (ptr); \ - (type *)( (char *)__mptr - offsetof(type,member) );}) -#endif - -#ifndef HAVE_PROGRAM_INVOCATION_SHORT_NAME -# ifdef HAVE___PROGNAME -extern char *__progname; -# define program_invocation_short_name __progname -# else -# ifdef HAVE_GETEXECNAME -# define program_invocation_short_name \ - prog_inv_sh_nm_from_file(getexecname(), 0) -# else -# define program_invocation_short_name \ - prog_inv_sh_nm_from_file(__FILE__, 1) -# endif -static char prog_inv_sh_nm_buf[256]; -static inline char * -prog_inv_sh_nm_from_file(char *f, char stripext) -{ - char *t; - - if ((t = strrchr(f, '/')) != NULL) - t++; - else - t = f; - - strncpy(prog_inv_sh_nm_buf, t, sizeof(prog_inv_sh_nm_buf) - 1); - prog_inv_sh_nm_buf[sizeof(prog_inv_sh_nm_buf) - 1] = '\0'; - - if (stripext && (t = strrchr(prog_inv_sh_nm_buf, '.')) != NULL) - *t = '\0'; - - return prog_inv_sh_nm_buf; -} -# endif -#endif - - -#ifndef HAVE_ERR_H -static inline void -errmsg(char doexit, int excode, char adderr, const char *fmt, ...) -{ - fprintf(stderr, "%s: ", program_invocation_short_name); - if (fmt != NULL) { - va_list argp; - va_start(argp, fmt); - vfprintf(stderr, fmt, argp); - va_end(argp); - if (adderr) - fprintf(stderr, ": "); - } - if (adderr) - fprintf(stderr, "%m"); - fprintf(stderr, "\n"); - if (doexit) - exit(excode); -} - -#ifndef HAVE_ERR -# define err(E, FMT...) errmsg(1, E, 1, FMT) -#endif - -#ifndef HAVE_ERRX -# define errx(E, FMT...) errmsg(1, E, 0, FMT) -#endif - -#ifndef HAVE_WARN -# define warn(FMT...) errmsg(0, 0, 1, FMT) -#endif - -#ifndef HAVE_WARNX -# define warnx(FMT...) errmsg(0, 0, 0, FMT) -#endif -#endif /* !HAVE_ERR_H */ - - -/* Don't use inline function to avoid '#include "nls.h"' in c.h - */ -#define errtryhelp(eval) __extension__ ({ \ - fprintf(stderr, _("Try '%s --help' for more information.\n"), \ - program_invocation_short_name); \ - exit(eval); \ -}) - -/* After failed execvp() */ -#define EX_EXEC_FAILED 126 /* Program located, but not usable. */ -#define EX_EXEC_ENOENT 127 /* Could not find program to exec. */ -#define errexec(name) err(errno == ENOENT ? EX_EXEC_ENOENT : EX_EXEC_FAILED, \ - _("failed to execute %s"), name) - - -static inline __attribute__((const)) int is_power_of_2(unsigned long num) -{ - return (num != 0 && ((num & (num - 1)) == 0)); -} - -#ifndef HAVE_LOFF_T -typedef int64_t loff_t; -#endif - -#if !defined(HAVE_DIRFD) && (!defined(HAVE_DECL_DIRFD) || HAVE_DECL_DIRFD == 0) && defined(HAVE_DIR_DD_FD) -#include <sys/types.h> -#include <dirent.h> -static inline int dirfd(DIR *d) -{ - return d->dd_fd; -} -#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 - -#ifndef IUTF8 -#define IUTF8 0040000 -#endif - -/* - * 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 -} - -/* - * Constant strings for usage() functions. For more info see - * Documentation/{howto-usage-function.txt,boilerplate.c} - */ -#define USAGE_HEADER _("\nUsage:\n") -#define USAGE_OPTIONS _("\nOptions:\n") -#define USAGE_FUNCTIONS _("\nFunctions:\n") -#define USAGE_COMMANDS _("\nCommands:\n") -#define USAGE_ARGUMENTS _("\nArguments:\n") -#define USAGE_COLUMNS _("\nAvailable output columns:\n") -#define USAGE_SEPARATOR "\n" - -#define USAGE_OPTSTR_HELP _("display this help") -#define USAGE_OPTSTR_VERSION _("display version") - -#define USAGE_HELP_OPTIONS(marg_dsc) \ - "%-" #marg_dsc "s%s\n" \ - "%-" #marg_dsc "s%s\n" \ - , " -h, --help", USAGE_OPTSTR_HELP \ - , " -V, --version", USAGE_OPTSTR_VERSION - -#define USAGE_ARG_SEPARATOR "\n" -#define USAGE_ARG_SIZE(_name) \ - _(" %s arguments may be followed by the suffixes for\n" \ - " GiB, TiB, PiB, EiB, ZiB, and YiB (the \"iB\" is optional)\n"), _name - -#define USAGE_MAN_TAIL(_man) _("\nFor more details see %s.\n"), _man - -#define UTIL_LINUX_VERSION _("%s from %s\n"), program_invocation_short_name, PACKAGE_STRING - -#define print_version(eval) __extension__ ({ \ - printf(UTIL_LINUX_VERSION); \ - exit(eval); \ -}) - -/* - * scanf modifiers for "strings allocation" - */ -#ifdef HAVE_SCANF_MS_MODIFIER -#define UL_SCNsA "%ms" -#elif defined(HAVE_SCANF_AS_MODIFIER) -#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 __has_feature(address_sanitizer) && __has_attribute(no_sanitize_memory) && __has_attribute(no_sanitize_address) -# define UL_ASAN_BLACKLIST __attribute__((noinline)) __attribute__((no_sanitize_memory)) __attribute__((no_sanitize_address)) -#else -# define UL_ASAN_BLACKLIST /* nothing */ -#endif - -/* - * Note that sysconf(_SC_GETPW_R_SIZE_MAX) returns *initial* suggested size for - * pwd buffer and in some cases it is not large enough. See POSIX and - * getpwnam_r man page for more details. - */ -#define UL_GETPW_BUFSIZ (16 * 1024) - -/* - * Darwin or other BSDs may only have MAP_ANON. To get it on Darwin we must - * define _DARWIN_C_SOURCE before including sys/mman.h. We do this in config.h. - */ -#if !defined MAP_ANONYMOUS && defined MAP_ANON -# define MAP_ANONYMOUS (MAP_ANON) -#endif - -#endif /* UTIL_LINUX_C_H */ |