6367a2352e
sfork(2) now calls sforkr(2) with the current registers. This will prove useful in creating threads, where user-space now can fully control what state the child will start in. This is unlike the Linux clone system call that accepts a pointer to the child stack; this is more powerful and somehow simpler. Note that this will create a rather raw thread; no thread initization has been done by the standard thread API (when it is implemented), so this feature shouldn't be used by programmers unless they know what they are doing. fork(2) now calls sfork(2) directly. Also removed fork(2) and sfork(2) from the kernel as they are done using sforkr(2) now. So technically they aren't system calls right now, but that could always change.
207 lines
5.8 KiB
C
207 lines
5.8 KiB
C
/*******************************************************************************
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COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011, 2012.
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This file is part of LibMaxsi.
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LibMaxsi is free software: you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the Free
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Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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LibMaxsi is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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details.
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You should have received a copy of the GNU Lesser General Public License
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along with LibMaxsi. If not, see <http://www.gnu.org/licenses/>.
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unistd.h
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The <unistd.h> header defines miscellaneous symbolic constants and types,
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and declares miscellaneous functions.
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*******************************************************************************/
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/* TODO: POSIX-1.2008 compliance is only partial */
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#ifndef _UNISTD_H
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#define _UNISTD_H 1
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#include <features.h>
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#if defined(_SORTIX_SOURCE)
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#include <stdint.h>
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#include <sortix/fork.h>
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#endif
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#include <sortix/seek.h>
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#include <sortix/unistd.h>
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#define _SORTIX_ALWAYS_SBRK
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__BEGIN_DECLS
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/* Currently just say we support the newest POSIX. */
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/* TODO: Support the newest POSIX. */
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#define _POSIX_VERSION 200809L
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#define _POSIX2_VERSION 200809L
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/* Currently just say we support the newest X/Open */
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/* TODO: Support the newest X/Open */
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#define _XOPEN_VERSION 700
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/* TODO: _POSIX_*, _POSIX2_*, _XOPEN_* is missing here. */
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/* TODO: _POSIX_*, _POSIX2_* is missing here. */
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@include(NULL.h)
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/* TODO: _CS_* is missing here. */
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/* TODO: F_* is missing here. */
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/* TODO: _PC_* is missing here. */
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/* TODO: _SC_* is missing here. */
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#define STDIN_FILENO (0)
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#define STDOUT_FILENO (1)
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#define STDERR_FILENO (2)
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/* TODO: _POSIX_VDISABLE is missing here. */
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@include(size_t.h)
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@include(ssize_t.h)
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@include(uid_t.h)
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@include(gid_t.h)
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@include(off_t.h)
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@include(pid_t.h)
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@include(useconds_t.h)
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#if defined(_SORTIX_SOURCE) || defined(_SORTIX_ALWAYS_SBRK)
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@include(intn_t.h)
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#endif
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#if defined(_WANT_ENVIRON)
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extern char** environ;
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#endif
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/* TODO: These are not implemented in libmaxsi/sortix yet. */
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#if defined(__SORTIX_SHOW_UNIMPLEMENTED)
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unsigned alarm(unsigned);
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int chown(const char*, uid_t, gid_t);
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size_t confstr(int, char*, size_t);
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char* crypt(const char*, const char*);
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char* ctermid(char*);
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int dup2(int, int);
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void encrypt(char [64], int);
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int execl(const char*, const char*, ...);
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int execle(const char*, const char*, ...);
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int execlp(const char*, const char*, ...);
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int execvp(const char*, char* const []);
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int faccessat(int, const char*, int, int);
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int fchdir(int);
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int fchown(int, uid_t, gid_t);
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int fchownat(int, const char*, uid_t, gid_t, int);
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int fdatasync(int);
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int fexecve(int, char* const [], char* const []);
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long fpathconf(int, int);
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int fsync(int);
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gid_t getegid(void);
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uid_t geteuid(void);
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gid_t getgid(void);
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int getgroups(int, gid_t []);
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long gethostid(void);
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int gethostname(char*, size_t);
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char* getlogin(void);
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int getlogin_r(char*, size_t);
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int getopt(int, char* const [], const char*);
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pid_t getpgid(pid_t);
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pid_t getpgrp(void);
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pid_t getsid(pid_t);
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uid_t getuid(void);
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int lchown(const char*, uid_t, gid_t);
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int link(const char*, const char*);
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int linkat(int, const char*, int, const char*, int);
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int lockf(int, int, off_t);
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int nice(int);
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long pathconf(const char*, int);
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int pause(void);
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ssize_t readlink(const char* restrict, char* restrict, size_t);
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ssize_t readlinkat(int, const char* restrict, char* restrict, size_t);
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int setegid(gid_t);
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int seteuid(uid_t);
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int setgid(gid_t);
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int setpgid(pid_t, pid_t);
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int setregid(gid_t, gid_t);
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int setreuid(uid_t, uid_t);
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pid_t setsid(void);
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int setuid(uid_t);
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void swab(const void* restrict, void* restrict, ssize_t);
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int symlink(const char*, const char*);
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int symlinkat(const char*, int, const char*);
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void sync(void);
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long sysconf(int);
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pid_t tcgetpgrp(int);
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int tcsetpgrp(int, pid_t);
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char* ttyname(int);
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int ttyname_r(int, char*, size_t);
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int unlinkat(int, const char*, int);
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#if __POSIX_OBSOLETE <= 200801
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pid_t setpgrp(void);
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#endif
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extern char* optarg;
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extern int opterr, optind, optopt;
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#endif
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int access(const char*, int);
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int chdir(const char*);
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int close(int);
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int dup(int);
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void _exit(int);
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int execv(const char*, char* const []);
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int execve(const char*, char* const [], char* const []);
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pid_t fork(void);
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int ftruncate(int, off_t);
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char* getcwd(char*, size_t);
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pid_t getpid(void);
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pid_t getppid(void);
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int isatty(int);
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off_t lseek(int, off_t, int);
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int pipe(int [2]);
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ssize_t pread(int, void*, size_t, off_t);
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ssize_t pwrite(int, const void*, size_t, off_t);
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ssize_t read(int, void*, size_t);
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int rmdir(const char*);
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unsigned sleep(unsigned);
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int truncate(const char*, off_t);
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#if __POSIX_OBSOLETE <= 200112 || defined(_SORTIX_SOURCE)
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int usleep(useconds_t useconds);
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#endif
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int unlink(const char*);
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ssize_t write(int, const void*, size_t);
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#if defined(_SORTIX_SOURCE)
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size_t getpagesize(void);
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int memstat(size_t* memused, size_t* memtotal);
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size_t preadall(int fd, void* buf, size_t count, off_t off);
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size_t preadleast(int fd, void* buf, size_t least, size_t max, off_t off);
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size_t pwriteall(int fd, const void* buf, size_t count, off_t off);
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size_t pwriteleast(int fd, const void* buf, size_t least, size_t max, off_t off);
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size_t readall(int fd, void* buf, size_t count);
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size_t readleast(int fd, void* buf, size_t least, size_t max);
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pid_t sfork(int flags);
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pid_t sforkr(int flags, sforkregs_t* regs);
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int uptime(uintmax_t* usecssinceboot);
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size_t writeall(int fd, const void* buf, size_t count);
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size_t writeleast(int fd, const void* buf, size_t least, size_t max);
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#endif
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#if defined(_SORTIX_SOURCE) || defined(_SORTIX_ALWAYS_SBRK)
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void* sbrk(intptr_t increment);
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#endif
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__END_DECLS
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#endif
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