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minix/include/unistd.h
Cristiano Giuffrida d1fd04e72a Initialization protocol for system services. 
SYSLIB CHANGES:
- SEF framework now supports a new SEF Init request type from RS. 3 different
callbacks are available (init_fresh, init_lu, init_restart) to specify
initialization code when a service starts fresh, starts after a live update,
or restarts.

SYSTEM SERVICE CHANGES:
- Initialization code for system services is now enclosed in a callback SEF will
automatically call at init time. The return code of the callback will
tell RS whether the initialization completed successfully.
- Each init callback can access information passed by RS to initialize. As of
now, each system service has access to the public entries of RS's system process
table to gather all the information required to initialize. This design
eliminates many existing or potential races at boot time and provides a uniform
initialization interface to system services. The same interface will be reused
for the upcoming publish/subscribe model to handle dynamic 
registration / deregistration of system services.

VM CHANGES:
- Uniform privilege management for all system services. Every service uses the
same call mask format. For boot services, VM copies the call mask from init
data. For dynamic services, VM still receives the call mask via rs_set_priv
call that will be soon replaced by the upcoming publish/subscribe model.

RS CHANGES:
- The system process table has been reorganized and split into private entries
and public entries. Only the latter ones are exposed to system services.
- VM call masks are now entirely configured in rs/table.c
- RS has now its own slot in the system process table. Only kernel tasks and
user processes not included in the boot image are now left out from the system
process table.
- RS implements the initialization protocol for system services.
- For services in the boot image, RS blocks till initialization is complete and
panics when failure is reported back. Services are initialized in their order of
appearance in the boot image priv table and RS blocks to implements synchronous
initialization for every system service having the flag SF_SYNCH_BOOT set.
- For services started dynamically, the initialization protocol is implemented
as though it were the first ping for the service. In this case, if the
system service fails to report back (or reports failure), RS brings the service
down rather than trying to restart it.
2010-01-08 01:20:42 +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 */
#define SI_LOADINFO 6 /* get copy of load average structure */
#define SI_KPROC_TAB 7 /* copy of kernel process table */
#define SI_CALL_STATS 8 /* system call statistics */
#define SI_PCI_INFO 9 /* get kernel info via PM */
#define SI_PROCPUB_TAB 10 /* 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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