extern "C" {
#endif
+#include <features.h>
+
#define STDIN_FILENO 0
#define STDOUT_FILENO 1
#define STDERR_FILENO 2
-#undef SEEK_SET
-#undef SEEK_CUR
-#undef SEEK_END
#define SEEK_SET 0
#define SEEK_CUR 1
#define SEEK_END 2
int linkat(int, const char *, int, const char *, int);
int symlink(const char *, const char *);
int symlinkat(const char *, int, const char *);
-ssize_t readlink(const char *, char *, size_t);
-ssize_t readlinkat(int, const char *, char *, size_t);
+ssize_t readlink(const char *__restrict, char *__restrict, size_t);
+ssize_t readlinkat(int, const char *__restrict, char *__restrict, size_t);
int unlink(const char *);
int unlinkat(int, const char *, int);
int rmdir(const char *);
#define R_OK 4
#define W_OK 2
#define X_OK 1
+
int access(const char *, int);
int faccessat(int, const char *, int, int);
int execvp(const char *, char *const []);
int execlp(const char *, const char *, ...);
int fexecve(int, char *const [], char *const []);
-void _exit(int);
+_Noreturn void _exit(int);
pid_t getpid(void);
pid_t getppid(void);
#define F_TLOCK 2
#define F_TEST 3
-#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
+#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
int lockf(int, int, off_t);
-pid_t setpgrp(void);
-char *crypt(const char *, const char *);
-void encrypt(char *, int);
-void swab(const void *, void *, ssize_t);
long gethostid(void);
int nice(int);
void sync(void);
-int getdtablesize(void);
#endif
-#ifdef _GNU_SOURCE
+#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
+pid_t setpgrp(void);
+char *crypt(const char *, const char *);
+void encrypt(char *, int);
+void swab(const void *__restrict, void *__restrict, ssize_t);
+#endif
+
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) \
+ || (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE < 700)
+int usleep(unsigned);
+unsigned ualarm(unsigned, unsigned);
+#endif
+
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+#define L_SET 0
+#define L_INCR 1
+#define L_XTND 2
int brk(void *);
void *sbrk(intptr_t);
-pid_t forkall(void);
pid_t vfork(void);
int vhangup(void);
int chroot(const char *);
int getpagesize(void);
+int getdtablesize(void);
int sethostname(const char *, size_t);
-int usleep(unsigned);
-unsigned ualarm(unsigned, unsigned);
+int getdomainname(char *, size_t);
int setgroups(size_t, const gid_t []);
+char *getpass(const char *);
+int daemon(int, int);
+void setusershell(void);
+void endusershell(void);
+char *getusershell(void);
+#endif
+
+#ifdef _GNU_SOURCE
+extern char **environ;
int setresuid(uid_t, uid_t, uid_t);
int setresgid(gid_t, gid_t, gid_t);
+int getresuid(uid_t *, uid_t *, uid_t *);
+int getresgid(gid_t *, gid_t *, gid_t *);
char *get_current_dir_name(void);
+int pipe2(int [2], int);
+#endif
+
+#if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)
+#define lseek64 lseek
+#define pread64 pread
+#define pwrite64 pwrite
+#define truncate64 truncate
+#define ftruncate64 ftruncate
+#define lockf64 lockf
+#define off64_t off_t
#endif
#define _XOPEN_VERSION 700