include/unistd.h

   1 /* The <unistd.h> header contains a few miscellaneous manifest constants. */
   2
   3 #ifndef _UNISTD_H
   4 #define _UNISTD_H
   5
   6 #ifndef _TYPES_H
   7 #include <sys/types.h>
   8 #endif
   9
  10 /* Values used by access().  POSIX Table 2-8. */
  11 #define F_OK               0    /* test if file exists */
  12 #define X_OK               1    /* test if file is executable */
  13 #define W_OK               2    /* test if file is writable */
  14 #define R_OK               4    /* test if file is readable */
  15
  16 /* Values used for whence in lseek(fd, offset, whence).  POSIX Table 2-9. */
  17 #define SEEK_SET           0    /* offset is absolute  */
  18 #define SEEK_CUR           1    /* offset is relative to current position */
  19 #define SEEK_END           2    /* offset is relative to end of file */
  20
  21 /* This value is required by POSIX Table 2-10. */
  22 #define _POSIX_VERSION 199009L  /* which standard is being conformed to */
  23
  24 /* These three definitions are required by POSIX Sec. 8.2.1.2. */
  25 #define STDIN_FILENO       0    /* file descriptor for stdin */
  26 #define STDOUT_FILENO      1    /* file descriptor for stdout */
  27 #define STDERR_FILENO      2    /* file descriptor for stderr */
  28
  29 #ifdef _MINIX
  30 /* How to exit the system or stop a server process. */
  31 #define RBT_HALT           0    /* shutdown and return to monitor */
  32 #define RBT_REBOOT         1    /* reboot the system through the monitor */
  33 #define RBT_PANIC          2    /* a server panics */
  34 #define RBT_MONITOR        3    /* let the monitor do this */
  35 #define RBT_RESET          4    /* hard reset the system */
  36 #define RBT_INVALID        5    /* first invalid reboot flag */
  37
  38 #define _PM_SEG_FLAG (1L << 30) /* for read() and write() to FS by PM */
  39 #endif
  40
  41 /* What system info to retrieve with sysgetinfo(). */
  42 #define SI_KINFO           0    /* get kernel info via PM */
  43 #define SI_PROC_ADDR       1    /* address of process table */
  44 #define SI_PROC_TAB        2    /* copy of entire process table */
  45 #define SI_DMAP_TAB        3    /* get device <-> driver mappings */
  46 #define SI_MEM_ALLOC       4    /* get memory allocation data */
  47 #define SI_DATA_STORE      5    /* get copy of data store */
  48 #define SI_LOADINFO        6    /* get copy of load average structure */
  49 #define SI_KPROC_TAB       7    /* copy of kernel process table */
  50 #define SI_CALL_STATS      8    /* system call statistics */
  51
  52 /* NULL must be defined in <unistd.h> according to POSIX Sec. 2.7.1. */
  53 #define NULL    ((void *)0)
  54
  55 /* The following relate to configurable system variables. POSIX Table 4-2. */
  56 #define _SC_ARG_MAX        1
  57 #define _SC_CHILD_MAX      2
  58 #define _SC_CLOCKS_PER_SEC 3
  59 #define _SC_CLK_TCK        3
  60 #define _SC_NGROUPS_MAX    4
  61 #define _SC_OPEN_MAX       5
  62 #define _SC_JOB_CONTROL    6
  63 #define _SC_SAVED_IDS      7
  64 #define _SC_VERSION        8
  65 #define _SC_STREAM_MAX     9
  66 #define _SC_TZNAME_MAX    10
  67 #define _SC_PAGESIZE      11
  68 #define _SC_PAGE_SIZE     _SC_PAGESIZE
  69
  70 /* The following relate to configurable pathname variables. POSIX Table 5-2. */
  71 #define _PC_LINK_MAX       1    /* link count */
  72 #define _PC_MAX_CANON      2    /* size of the canonical input queue */
  73 #define _PC_MAX_INPUT      3    /* type-ahead buffer size */
  74 #define _PC_NAME_MAX       4    /* file name size */
  75 #define _PC_PATH_MAX       5    /* pathname size */
  76 #define _PC_PIPE_BUF       6    /* pipe size */
  77 #define _PC_NO_TRUNC       7    /* treatment of long name components */
  78 #define _PC_VDISABLE       8    /* tty disable */
  79 #define _PC_CHOWN_RESTRICTED 9  /* chown restricted or not */
  80
  81 /* POSIX defines several options that may be implemented or not, at the
  82  * implementer's whim.  This implementer has made the following choices:
  83  *
  84  * _POSIX_JOB_CONTROL       not defined:        no job control
  85  * _POSIX_SAVED_IDS         not defined:        no saved uid/gid
  86  * _POSIX_NO_TRUNC          defined as -1:      long path names are truncated
  87  * _POSIX_CHOWN_RESTRICTED  defined:            you can't give away files
  88  * _POSIX_VDISABLE          defined:            tty functions can be disabled
  89  */
  90 #define _POSIX_NO_TRUNC       (-1)
  91 #define _POSIX_CHOWN_RESTRICTED  1
  92
  93 /* Function Prototypes. */
  94 _PROTOTYPE( void _exit, (int _status)                                   );
  95 _PROTOTYPE( int access, (const char *_path, int _amode)                 );
  96 _PROTOTYPE( unsigned int alarm, (unsigned int _seconds)                 );
  97 _PROTOTYPE( int chdir, (const char *_path)                              );
  98 _PROTOTYPE( int fchdir, (int fd)                                        );
  99 _PROTOTYPE( int chown, (const char *_path, _mnx_Uid_t _owner, _mnx_Gid_t _group)        );
 100 _PROTOTYPE( int fchown, (int fd, _mnx_Uid_t _owner, _mnx_Gid_t _group)  );
 101 _PROTOTYPE( int close, (int _fd)                                        );
 102 _PROTOTYPE( char *ctermid, (char *_s)                                   );
 103 _PROTOTYPE( char *cuserid, (char *_s)                                   );
 104 _PROTOTYPE( int dup, (int _fd)                                          );
 105 _PROTOTYPE( int dup2, (int _fd, int _fd2)                               );
 106 _PROTOTYPE( int execl, (const char *_path, const char *_arg, ...)       );
 107 _PROTOTYPE( int execle, (const char *_path, const char *_arg, ...)      );
 108 _PROTOTYPE( int execlp, (const char *_file, const char *arg, ...)       );
 109 _PROTOTYPE( int execv, (const char *_path, char *const _argv[])         );
 110 _PROTOTYPE( int execve, (const char *_path, char *const _argv[],
 111                                                 char *const _envp[])    );
 112 _PROTOTYPE( int execvp, (const char *_file, char *const _argv[])        );
 113 _PROTOTYPE( pid_t fork, (void)                                          );
 114 _PROTOTYPE( long fpathconf, (int _fd, int _name)                        );
 115 _PROTOTYPE( char *getcwd, (char *_buf, size_t _size)                    );
 116 _PROTOTYPE( gid_t getegid, (void)                                       );
 117 _PROTOTYPE( uid_t geteuid, (void)                                       );
 118 _PROTOTYPE( gid_t getgid, (void)                                        );
 119 _PROTOTYPE( int getgroups, (int _gidsetsize, gid_t _grouplist[])        );
 120 _PROTOTYPE( char *getlogin, (void)                                      );
 121 _PROTOTYPE( pid_t getpgrp, (void)                                       );
 122 _PROTOTYPE( pid_t getpid, (void)                                        );
 123 _PROTOTYPE( pid_t getnpid, (int proc_nr)                                );
 124 _PROTOTYPE( pid_t getppid, (void)                                       );
 125 _PROTOTYPE( uid_t getuid, (void)                                        );
 126 _PROTOTYPE( int isatty, (int _fd)                                       );
 127 _PROTOTYPE( int link, (const char *_existing, const char *_new)         );
 128 _PROTOTYPE( off_t lseek, (int _fd, off_t _offset, int _whence)          );
 129 _PROTOTYPE( long pathconf, (const char *_path, int _name)               );
 130 _PROTOTYPE( int pause, (void)                                           );
 131 _PROTOTYPE( int pipe, (int _fildes[2])                                  );
 132 _PROTOTYPE( ssize_t read, (int _fd, void *_buf, size_t _n)              );
 133 _PROTOTYPE( int rmdir, (const char *_path)                              );
 134 _PROTOTYPE( int setgid, (_mnx_Gid_t _gid)                               );
 135 _PROTOTYPE( int setegid, (_mnx_Gid_t _gid)                              );
 136 _PROTOTYPE( int setpgid, (pid_t _pid, pid_t _pgid)                      );
 137 _PROTOTYPE( pid_t setsid, (void)                                        );
 138 _PROTOTYPE( int setuid, (_mnx_Uid_t _uid)                               );
 139 _PROTOTYPE( int seteuid, (_mnx_Uid_t _uid)                              );
 140 _PROTOTYPE( unsigned int sleep, (unsigned int _seconds)                 );
 141 _PROTOTYPE( long sysconf, (int _name)                                   );
 142 _PROTOTYPE( pid_t tcgetpgrp, (int _fd)                                  );
 143 _PROTOTYPE( int tcsetpgrp, (int _fd, pid_t _pgrp_id)                    );
 144 _PROTOTYPE( char *ttyname, (int _fd)                                    );
 145 _PROTOTYPE( int unlink, (const char *_path)                             );
 146 _PROTOTYPE( ssize_t write, (int _fd, const void *_buf, size_t _n)       );
 147 _PROTOTYPE( int truncate, (const char *_path, off_t _length)            );
 148 _PROTOTYPE( int ftruncate, (int _fd, off_t _length)                     );
 149 _PROTOTYPE( int nice, (int _incr)                                       );
 150
 151 /* Open Group Base Specifications Issue 6 (not complete) */
 152 _PROTOTYPE( int symlink, (const char *path1, const char *path2)         );
 153 _PROTOTYPE( int readlink, (const char *, char *, size_t)                );
 154 _PROTOTYPE( int getopt, (int _argc, char * const _argv[], char const *_opts)            );
 155 extern char *optarg;
 156 extern int optind, opterr, optopt;
 157 _PROTOTYPE( int usleep, (useconds_t _useconds)                          );
 158
 159 #ifdef _MINIX
 160 #ifndef _TYPE_H
 161 #include <minix/type.h>
 162 #endif
 163
 164 extern int optreset;    /* Reset getopt state */
 165
 166 _PROTOTYPE( int brk, (char *_addr)                                      );
 167 _PROTOTYPE( int chroot, (const char *_name)                             );
 168 _PROTOTYPE( int lseek64, (int _fd, u64_t _offset, int _whence,
 169                                                 u64_t *_newpos)         );
 170 _PROTOTYPE( int mknod, (const char *_name, _mnx_Mode_t _mode, Dev_t _addr)      );
 171 _PROTOTYPE( int mknod4, (const char *_name, _mnx_Mode_t _mode, Dev_t _addr,
 172             long _size)                                                 );
 173 _PROTOTYPE( char *mktemp, (char *_template)                             );
 174 _PROTOTYPE( int mount, (char *_spec, char *_name, int _flag)            );
 175 _PROTOTYPE( long ptrace, (int _req, pid_t _pid, long _addr, long _data) );
 176 _PROTOTYPE( char *sbrk, (int _incr)                                     );
 177 _PROTOTYPE( int sync, (void)                                            );
 178 _PROTOTYPE( int fsync, (int fd)                                         );
 179 _PROTOTYPE( int umount, (const char *_name)                             );
 180 _PROTOTYPE( int reboot, (int _how, ...)                                 );
 181 _PROTOTYPE( int gethostname, (char *_hostname, size_t _len)             );
 182 _PROTOTYPE( int getdomainname, (char *_domain, size_t _len)             );
 183 _PROTOTYPE( int ttyslot, (void)                                         );
 184 _PROTOTYPE( int fttyslot, (int _fd)                                     );
 185 _PROTOTYPE( char *crypt, (const char *_key, const char *_salt)          );
 186 _PROTOTYPE( int getsysinfo, (int who, int what, void *where)            );
 187 _PROTOTYPE( int getsigset, (sigset_t *sigset)                           );
 188 _PROTOTYPE( int getprocnr, (void)                                       );
 189 _PROTOTYPE( int getnprocnr, (pid_t pid)                                 );
 190 _PROTOTYPE( int getpprocnr, (void)                                      );
 191 _PROTOTYPE( int _pm_findproc, (char *proc_name, int *proc_nr)           );
 192 _PROTOTYPE( int allocmem, (phys_bytes size, phys_bytes *base)           );
 193 _PROTOTYPE( int freemem, (phys_bytes size, phys_bytes base)             );
 194 #define DEV_MAP 1
 195 #define DEV_UNMAP 2
 196 #define mapdriver(driver, device, style, force) \
 197         devctl(DEV_MAP, driver, device, style, force)
 198 #define unmapdriver(device) devctl(DEV_UNMAP, 0, device, 0)
 199 _PROTOTYPE( int devctl, (int ctl_req, int driver, int device, int style,
 200         int force)                                                      );
 201
 202 /* For compatibility with other Unix systems */
 203 _PROTOTYPE( int getpagesize, (void)                                     );
 204 _PROTOTYPE( int setgroups, (int ngroups, const gid_t *gidset)           );
 205 _PROTOTYPE( int initgroups, (const char *name, gid_t basegid)           );
 206
 207 #endif
 208
 209 #endif /* _UNISTD_H */