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Compat.h
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Compat.h
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#ifndef HEADER_Compat
#define HEADER_Compat
/*
htop - Compat.h
(C) 2020 htop dev team
Released under the GNU GPLv2+, see the COPYING file
in the source distribution for its full text.
*/
#include <assert.h> // IWYU pragma: keep
#include <fcntl.h>
#include <stddef.h> // IWYU pragma: keep
#include <unistd.h>
#include <sys/stat.h> // IWYU pragma: keep
int Compat_faccessat(int dirfd,
const char* pathname,
int mode,
int flags);
int Compat_fstatat(int dirfd,
const char* dirpath,
const char* pathname,
struct stat* statbuf,
int flags);
#ifdef HAVE_OPENAT
typedef int openat_arg_t;
static inline void Compat_openatArgClose(openat_arg_t dirfd) {
close(dirfd);
}
static inline int Compat_openat(openat_arg_t dirfd, const char* pathname, int flags) {
return openat(dirfd, pathname, flags);
}
#else /* HAVE_OPENAT */
typedef const char* openat_arg_t;
static inline void Compat_openatArgClose(openat_arg_t dirpath) {
(void)dirpath;
}
int Compat_openat(openat_arg_t dirpath, const char* pathname, int flags);
#endif /* HAVE_OPENAT */
ssize_t Compat_readlinkat(int dirfd,
const char* dirpath,
const char* pathname,
char* buf,
size_t bufsize);
ssize_t Compat_readlink(openat_arg_t dirfd,
const char* pathname,
char* buf,
size_t bufsize);
/*
* static_assert() hack for pre-C11
* TODO: drop after moving to -std=c11 or newer
*/
/* C11 guarantees _Static_assert is a keyword */
#if (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) < 201112L
# if !defined(_Static_assert)
# define _Static_assert(expr, msg) \
extern int (*__Static_assert_function (void)) \
[!!sizeof (struct { int __error_if_negative: (expr) ? 2 : -1; })]
# endif
#endif
/* C23 guarantees static_assert is a keyword or a macro */
#if (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) < 202311L
# if !defined(static_assert)
# define static_assert(expr, msg) _Static_assert(expr, msg)
# endif
#endif
#endif /* HEADER_Compat */