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minix/include/unistd.h
Cristiano Giuffrida c5b309ff07 Merge of Wu's GSOC 09 branch (src.20090525.r4372.wu) 
Main changes:
- COW optimization for safecopy.
- safemap, a grant-based interface for sharing memory regions between processes.
- Integration with safemap and complete rework of DS, supporting new data types
  natively (labels, memory ranges, memory mapped ranges).
- For further information:
  http://wiki.minix3.org/en/SummerOfCode2009/MemoryGrants

Additional changes not included in the original Wu's branch:
- Fixed unhandled case in VM when using COW optimization for safecopy in case
  of a block that has already been shared as SMAP.
- Better interface and naming scheme for sys_saferevmap and ds_retrieve_map
  calls.
- Better input checking in syslib: check for page alignment when creating
  memory mapping grants.
- DS notifies subscribers when an entry is deleted.
- Documented the behavior of indirect grants in case of memory mapping.
- Test suite in /usr/src/test/safeperf|safecopy|safemap|ds/* reworked
  and extended.
- Minor fixes and general cleanup.
- TO-DO: Grant ids should be generated and managed the way endpoints are to make
sure grant slots are never misreused.
2010-01-14 15:24:16 +00:00

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/* The <unistd.h> header contains a few miscellaneous manifest constants. */
#ifndef _UNISTD_H
#define _UNISTD_H
#ifndef _TYPES_H
#include <minix/types.h>
#endif
/* Values used by access(). POSIX Table 2-8. */
#define F_OK 0 /* test if file exists */
#define X_OK 1 /* test if file is executable */
#define W_OK 2 /* test if file is writable */
#define R_OK 4 /* test if file is readable */
/* Values used for whence in lseek(fd, offset, whence). POSIX Table 2-9. */
#define SEEK_SET 0 /* offset is absolute */
#define SEEK_CUR 1 /* offset is relative to current position */
#define SEEK_END 2 /* offset is relative to end of file */
/* This value is required by POSIX Table 2-10. */
#define _POSIX_VERSION 199009L /* which standard is being conformed to */
/* These three definitions are required by POSIX Sec. 8.2.1.2. */
#define STDIN_FILENO 0 /* file descriptor for stdin */
#define STDOUT_FILENO 1 /* file descriptor for stdout */
#define STDERR_FILENO 2 /* file descriptor for stderr */
#ifdef _MINIX
/* How to exit the system or stop a server process. */
#define RBT_HALT 0 /* shutdown and return to monitor */
#define RBT_REBOOT 1 /* reboot the system through the monitor */
#define RBT_PANIC 2 /* a server panics */
#define RBT_MONITOR 3 /* let the monitor do this */
#define RBT_RESET 4 /* hard reset the system */
#define RBT_INVALID 5 /* first invalid reboot flag */
#define _PM_SEG_FLAG (1L << 30) /* for read() and write() to FS by PM */
#endif
/* What system info to retrieve with sysgetinfo(). */
#define SI_KINFO 0 /* get kernel info via PM */
#define SI_PROC_ADDR 1 /* address of process table */
#define SI_PROC_TAB 2 /* copy of entire process table */
#define SI_DMAP_TAB 3 /* get device <-> driver mappings */
#define SI_MEM_ALLOC 4 /* get memory allocation data */
#define SI_DATA_STORE 5 /* get copy of data store mappings */
#define SI_SUBSCRIPTION 6 /* get copy of data store subscriptions */
#define SI_LOADINFO 7 /* get copy of load average structure */
#define SI_KPROC_TAB 8 /* copy of kernel process table */
#define SI_CALL_STATS 9 /* system call statistics */
#define SI_PCI_INFO 10 /* get kernel info via PM */
#define SI_PROCPUB_TAB 11 /* copy of public entries of process table */
/* NULL must be defined in <unistd.h> according to POSIX Sec. 2.7.1. */
#define NULL ((void *)0)
/* The following relate to configurable system variables. POSIX Table 4-2. */
#define _SC_ARG_MAX 1
#define _SC_CHILD_MAX 2
#define _SC_CLOCKS_PER_SEC 3
#define _SC_CLK_TCK 3
#define _SC_NGROUPS_MAX 4
#define _SC_OPEN_MAX 5
#define _SC_JOB_CONTROL 6
#define _SC_SAVED_IDS 7
#define _SC_VERSION 8
#define _SC_STREAM_MAX 9
#define _SC_TZNAME_MAX 10
#define _SC_PAGESIZE 11
#define _SC_PAGE_SIZE _SC_PAGESIZE
/* The following relate to configurable pathname variables. POSIX Table 5-2. */
#define _PC_LINK_MAX 1 /* link count */
#define _PC_MAX_CANON 2 /* size of the canonical input queue */
#define _PC_MAX_INPUT 3 /* type-ahead buffer size */
#define _PC_NAME_MAX 4 /* file name size */
#define _PC_PATH_MAX 5 /* pathname size */
#define _PC_PIPE_BUF 6 /* pipe size */
#define _PC_NO_TRUNC 7 /* treatment of long name components */
#define _PC_VDISABLE 8 /* tty disable */
#define _PC_CHOWN_RESTRICTED 9 /* chown restricted or not */
/* POSIX defines several options that may be implemented or not, at the
* implementer's whim. This implementer has made the following choices:
*
* _POSIX_JOB_CONTROL not defined: no job control
* _POSIX_SAVED_IDS not defined: no saved uid/gid
* _POSIX_NO_TRUNC defined as -1: long path names are truncated
* _POSIX_CHOWN_RESTRICTED defined: you can't give away files
* _POSIX_VDISABLE defined: tty functions can be disabled
*/
#define _POSIX_NO_TRUNC (-1)
#define _POSIX_CHOWN_RESTRICTED 1
/* Function Prototypes. */
_PROTOTYPE( void _exit, (int _status) );
_PROTOTYPE( int access, (const char *_path, int _amode) );
_PROTOTYPE( unsigned int alarm, (unsigned int _seconds) );
_PROTOTYPE( int chdir, (const char *_path) );
_PROTOTYPE( int fchdir, (int fd) );
_PROTOTYPE( int chown, (const char *_path, _mnx_Uid_t _owner, _mnx_Gid_t _group) );
_PROTOTYPE( int fchown, (int fd, _mnx_Uid_t _owner, _mnx_Gid_t _group) );
_PROTOTYPE( int close, (int _fd) );
_PROTOTYPE( char *ctermid, (char *_s) );
_PROTOTYPE( char *cuserid, (char *_s) );
_PROTOTYPE( int dup, (int _fd) );
_PROTOTYPE( int dup2, (int _fd, int _fd2) );
_PROTOTYPE( int execl, (const char *_path, const char *_arg, ...) );
_PROTOTYPE( int execle, (const char *_path, const char *_arg, ...) );
_PROTOTYPE( int execlp, (const char *_file, const char *arg, ...) );
_PROTOTYPE( int execv, (const char *_path, char *const _argv[]) );
_PROTOTYPE( int execve, (const char *_path, char *const _argv[],
char *const _envp[]) );
_PROTOTYPE( int execvp, (const char *_file, char *const _argv[]) );
_PROTOTYPE( pid_t fork, (void) );
_PROTOTYPE( long fpathconf, (int _fd, int _name) );
_PROTOTYPE( char *getcwd, (char *_buf, size_t _size) );
_PROTOTYPE( gid_t getegid, (void) );
_PROTOTYPE( uid_t geteuid, (void) );
_PROTOTYPE( gid_t getgid, (void) );
_PROTOTYPE( int getgroups, (int _gidsetsize, gid_t _grouplist[]) );
_PROTOTYPE( int setgroups, (int _ngroups, gid_t const *grps) );
_PROTOTYPE( char *getlogin, (void) );
_PROTOTYPE( pid_t getpgrp, (void) );
_PROTOTYPE( pid_t getpid, (void) );
_PROTOTYPE( pid_t getppid, (void) );
_PROTOTYPE( uid_t getuid, (void) );
_PROTOTYPE( int isatty, (int _fd) );
_PROTOTYPE( int link, (const char *_existing, const char *_new) );
_PROTOTYPE( off_t lseek, (int _fd, off_t _offset, int _whence) );
_PROTOTYPE( long pathconf, (const char *_path, int _name) );
_PROTOTYPE( int pause, (void) );
_PROTOTYPE( int pipe, (int _fildes[2]) );
_PROTOTYPE( ssize_t read, (int _fd, void *_buf, size_t _n) );
_PROTOTYPE( int rmdir, (const char *_path) );
_PROTOTYPE( int setgid, (_mnx_Gid_t _gid) );
_PROTOTYPE( int setegid, (_mnx_Gid_t _gid) );
_PROTOTYPE( int setpgid, (pid_t _pid, pid_t _pgid) );
_PROTOTYPE( pid_t setsid, (void) );
_PROTOTYPE( int setuid, (_mnx_Uid_t _uid) );
_PROTOTYPE( int seteuid, (_mnx_Uid_t _uid) );
_PROTOTYPE( unsigned int sleep, (unsigned int _seconds) );
_PROTOTYPE( long sysconf, (int _name) );
_PROTOTYPE( pid_t tcgetpgrp, (int _fd) );
_PROTOTYPE( int tcsetpgrp, (int _fd, pid_t _pgrp_id) );
_PROTOTYPE( char *ttyname, (int _fd) );
_PROTOTYPE( int unlink, (const char *_path) );
_PROTOTYPE( ssize_t write, (int _fd, const void *_buf, size_t _n) );
_PROTOTYPE( int truncate, (const char *_path, off_t _length) );
_PROTOTYPE( int ftruncate, (int _fd, off_t _length) );
_PROTOTYPE( int nice, (int _incr) );
/* Open Group Base Specifications Issue 6 (not complete) */
_PROTOTYPE( int symlink, (const char *path1, const char *path2) );
_PROTOTYPE( int readlink, (const char *, char *, size_t) );
_PROTOTYPE( int getopt, (int _argc, char * const _argv[], char const *_opts) );
extern char *optarg;
extern int optind, opterr, optopt;
_PROTOTYPE( int usleep, (useconds_t _useconds) );
#ifdef _MINIX
#ifndef _TYPE_H
#include <minix/type.h>
#endif
extern int optreset; /* Reset getopt state */
_PROTOTYPE( int brk, (char *_addr) );
_PROTOTYPE( int chroot, (const char *_name) );
_PROTOTYPE( int lseek64, (int _fd, u64_t _offset, int _whence,
u64_t *_newpos) );
_PROTOTYPE( int mknod, (const char *_name, _mnx_Mode_t _mode, Dev_t _addr) );
_PROTOTYPE( int mknod4, (const char *_name, _mnx_Mode_t _mode, Dev_t _addr,
long _size) );
_PROTOTYPE( char *mktemp, (char *_template) );
_PROTOTYPE( long ptrace, (int _req, pid_t _pid, long _addr, long _data) );
_PROTOTYPE( char *sbrk, (int _incr) );
_PROTOTYPE( int sync, (void) );
_PROTOTYPE( int fsync, (int fd) );
_PROTOTYPE( int reboot, (int _how, ...) );
_PROTOTYPE( int gethostname, (char *_hostname, size_t _len) );
_PROTOTYPE( int getdomainname, (char *_domain, size_t _len) );
_PROTOTYPE( int ttyslot, (void) );
_PROTOTYPE( int fttyslot, (int _fd) );
_PROTOTYPE( char *crypt, (const char *_key, const char *_salt) );
_PROTOTYPE( int getsysinfo, (endpoint_t who, int what, void *where) );
_PROTOTYPE( int getsigset, (sigset_t *sigset) );
_PROTOTYPE( int getprocnr, (void) );
_PROTOTYPE( int getnprocnr, (pid_t pid) );
_PROTOTYPE( int getpprocnr, (void) );
_PROTOTYPE( int _pm_findproc, (char *proc_name, int *proc_nr) );
_PROTOTYPE( int mapdriver, (char *label, int major, int style,
int force) );
_PROTOTYPE(int adddma, (endpoint_t proc_e,
phys_bytes start, phys_bytes size) );
_PROTOTYPE(int deldma, (endpoint_t proc_e,
phys_bytes start, phys_bytes size) );
_PROTOTYPE(int getdma, (endpoint_t *procp, phys_bytes *basep,
phys_bytes *sizep) );
_PROTOTYPE( pid_t getnpid, (endpoint_t proc_ep) );
_PROTOTYPE( uid_t getnuid, (endpoint_t proc_ep) );
_PROTOTYPE( gid_t getngid, (endpoint_t proc_ep) );
/* For compatibility with other Unix systems */
_PROTOTYPE( int getpagesize, (void) );
_PROTOTYPE( int setgroups, (int ngroups, const gid_t *gidset) );
_PROTOTYPE( int initgroups, (const char *name, gid_t basegid) );
#endif
#ifdef _POSIX_SOURCE
_PROTOTYPE( int getdtablesize, (void) );
#endif
#endif /* _UNISTD_H */
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