The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/include/unistd.h

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    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
   32 #define RBT_REBOOT         1
   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 #endif
   37 
   38 /* What system info to retrieve with sysgetinfo(). */
   39 #define SI_KINFO           0    /* get kernel info via PM */
   40 #define SI_PROC_ADDR       1    /* address of process table */
   41 #define SI_PROC_TAB        2    /* copy of entire process table */
   42 #define SI_DMAP_TAB        3    /* get device <-> driver mappings */
   43 #define SI_MEM_ALLOC       4    /* get memory allocation data */
   44 #define SI_DATA_STORE      5    /* get copy of data store */
   45 
   46 /* NULL must be defined in <unistd.h> according to POSIX Sec. 2.7.1. */
   47 #define NULL    ((void *)0)
   48 
   49 /* The following relate to configurable system variables. POSIX Table 4-2. */
   50 #define _SC_ARG_MAX        1
   51 #define _SC_CHILD_MAX      2
   52 #define _SC_CLOCKS_PER_SEC 3
   53 #define _SC_CLK_TCK        3
   54 #define _SC_NGROUPS_MAX    4
   55 #define _SC_OPEN_MAX       5
   56 #define _SC_JOB_CONTROL    6
   57 #define _SC_SAVED_IDS      7
   58 #define _SC_VERSION        8
   59 #define _SC_STREAM_MAX     9
   60 #define _SC_TZNAME_MAX    10
   61 
   62 /* The following relate to configurable pathname variables. POSIX Table 5-2. */
   63 #define _PC_LINK_MAX       1    /* link count */
   64 #define _PC_MAX_CANON      2    /* size of the canonical input queue */
   65 #define _PC_MAX_INPUT      3    /* type-ahead buffer size */
   66 #define _PC_NAME_MAX       4    /* file name size */
   67 #define _PC_PATH_MAX       5    /* pathname size */
   68 #define _PC_PIPE_BUF       6    /* pipe size */
   69 #define _PC_NO_TRUNC       7    /* treatment of long name components */
   70 #define _PC_VDISABLE       8    /* tty disable */
   71 #define _PC_CHOWN_RESTRICTED 9  /* chown restricted or not */
   72 
   73 /* POSIX defines several options that may be implemented or not, at the
   74  * implementer's whim.  This implementer has made the following choices:
   75  *
   76  * _POSIX_JOB_CONTROL       not defined:        no job control
   77  * _POSIX_SAVED_IDS         not defined:        no saved uid/gid
   78  * _POSIX_NO_TRUNC          defined as -1:      long path names are truncated
   79  * _POSIX_CHOWN_RESTRICTED  defined:            you can't give away files
   80  * _POSIX_VDISABLE          defined:            tty functions can be disabled
   81  */
   82 #define _POSIX_NO_TRUNC       (-1)
   83 #define _POSIX_CHOWN_RESTRICTED  1
   84 
   85 /* Function Prototypes. */
   86 _PROTOTYPE( void _exit, (int _status)                                   );
   87 _PROTOTYPE( int access, (const char *_path, int _amode)                 );
   88 _PROTOTYPE( unsigned int alarm, (unsigned int _seconds)                 );
   89 _PROTOTYPE( int chdir, (const char *_path)                              );
   90 _PROTOTYPE( int fchdir, (int fd)                                        );
   91 _PROTOTYPE( int chown, (const char *_path, _mnx_Uid_t _owner, _mnx_Gid_t _group)        );
   92 _PROTOTYPE( int close, (int _fd)                                        );
   93 _PROTOTYPE( char *ctermid, (char *_s)                                   );
   94 _PROTOTYPE( char *cuserid, (char *_s)                                   );
   95 _PROTOTYPE( int dup, (int _fd)                                          );
   96 _PROTOTYPE( int dup2, (int _fd, int _fd2)                               );
   97 _PROTOTYPE( int execl, (const char *_path, const char *_arg, ...)       );
   98 _PROTOTYPE( int execle, (const char *_path, const char *_arg, ...)      );
   99 _PROTOTYPE( int execlp, (const char *_file, const char *arg, ...)       );
  100 _PROTOTYPE( int execv, (const char *_path, char *const _argv[])         );
  101 _PROTOTYPE( int execve, (const char *_path, char *const _argv[], 
  102                                                 char *const _envp[])    );
  103 _PROTOTYPE( int execvp, (const char *_file, char *const _argv[])        );
  104 _PROTOTYPE( pid_t fork, (void)                                          );
  105 _PROTOTYPE( long fpathconf, (int _fd, int _name)                        );
  106 _PROTOTYPE( char *getcwd, (char *_buf, size_t _size)                    );
  107 _PROTOTYPE( gid_t getegid, (void)                                       );
  108 _PROTOTYPE( uid_t geteuid, (void)                                       );
  109 _PROTOTYPE( gid_t getgid, (void)                                        );
  110 _PROTOTYPE( int getgroups, (int _gidsetsize, gid_t _grouplist[])        );
  111 _PROTOTYPE( char *getlogin, (void)                                      );
  112 _PROTOTYPE( pid_t getpgrp, (void)                                       );
  113 _PROTOTYPE( pid_t getpid, (void)                                        );
  114 _PROTOTYPE( pid_t getnpid, (int proc_nr)                                );
  115 _PROTOTYPE( pid_t getppid, (void)                                       );
  116 _PROTOTYPE( uid_t getuid, (void)                                        );
  117 _PROTOTYPE( int isatty, (int _fd)                                       );
  118 _PROTOTYPE( int link, (const char *_existing, const char *_new)         );
  119 _PROTOTYPE( off_t lseek, (int _fd, off_t _offset, int _whence)          );
  120 _PROTOTYPE( long pathconf, (const char *_path, int _name)               );
  121 _PROTOTYPE( int pause, (void)                                           );
  122 _PROTOTYPE( int pipe, (int _fildes[2])                                  );
  123 _PROTOTYPE( ssize_t read, (int _fd, void *_buf, size_t _n)              );
  124 _PROTOTYPE( int rmdir, (const char *_path)                              );
  125 _PROTOTYPE( int setgid, (_mnx_Gid_t _gid)                               );
  126 _PROTOTYPE( int setpgid, (pid_t _pid, pid_t _pgid)                      );
  127 _PROTOTYPE( pid_t setsid, (void)                                        );
  128 _PROTOTYPE( int setuid, (_mnx_Uid_t _uid)                               );
  129 _PROTOTYPE( unsigned int sleep, (unsigned int _seconds)                 );
  130 _PROTOTYPE( long sysconf, (int _name)                                   );
  131 _PROTOTYPE( pid_t tcgetpgrp, (int _fd)                                  );
  132 _PROTOTYPE( int tcsetpgrp, (int _fd, pid_t _pgrp_id)                    );
  133 _PROTOTYPE( char *ttyname, (int _fd)                                    );
  134 _PROTOTYPE( int unlink, (const char *_path)                             );
  135 _PROTOTYPE( ssize_t write, (int _fd, const void *_buf, size_t _n)       );
  136 
  137 /* Open Group Base Specifications Issue 6 (not complete) */
  138 _PROTOTYPE( int symlink, (const char *path1, const char *path2)         );
  139 _PROTOTYPE( int getopt, (int _argc, char **_argv, char *_opts)          );
  140 extern char *optarg;
  141 extern int optind, opterr, optopt;
  142 _PROTOTYPE( int usleep, (useconds_t _useconds)                          );
  143 
  144 #ifdef _MINIX
  145 #ifndef _TYPE_H
  146 #include <minix/type.h>
  147 #endif
  148 _PROTOTYPE( int brk, (char *_addr)                                      );
  149 _PROTOTYPE( int chroot, (const char *_name)                             );
  150 _PROTOTYPE( int mknod, (const char *_name, _mnx_Mode_t _mode, Dev_t _addr)      );
  151 _PROTOTYPE( int mknod4, (const char *_name, _mnx_Mode_t _mode, Dev_t _addr,
  152             long _size)                                                 );
  153 _PROTOTYPE( char *mktemp, (char *_template)                             );
  154 _PROTOTYPE( int mount, (char *_spec, char *_name, int _flag)            );
  155 _PROTOTYPE( long ptrace, (int _req, pid_t _pid, long _addr, long _data) );
  156 _PROTOTYPE( char *sbrk, (int _incr)                                     );
  157 _PROTOTYPE( int sync, (void)                                            );
  158 _PROTOTYPE( int fsync, (int fd)                                         );
  159 _PROTOTYPE( int umount, (const char *_name)                             );
  160 _PROTOTYPE( int reboot, (int _how, ...)                                 );
  161 _PROTOTYPE( int gethostname, (char *_hostname, size_t _len)             );
  162 _PROTOTYPE( int getdomainname, (char *_domain, size_t _len)             );
  163 _PROTOTYPE( int ttyslot, (void)                                         );
  164 _PROTOTYPE( int fttyslot, (int _fd)                                     );
  165 _PROTOTYPE( char *crypt, (const char *_key, const char *_salt)          );
  166 _PROTOTYPE( int getsysinfo, (int who, int what, void *where)            );
  167 _PROTOTYPE( int getprocnr, (void)                                       );
  168 _PROTOTYPE( int getnprocnr, (pid_t pid)                                 );
  169 _PROTOTYPE( int getpprocnr, (void)                                      );
  170 _PROTOTYPE( int findproc, (char *proc_name, int *proc_nr)               );
  171 _PROTOTYPE( int allocmem, (phys_bytes size, phys_bytes *base)           );
  172 _PROTOTYPE( int freemem, (phys_bytes size, phys_bytes base)             );
  173 #define DEV_MAP 1
  174 #define DEV_UNMAP 2
  175 #define mapdriver(driver, device, style) devctl(DEV_MAP, driver, device, style)
  176 #define unmapdriver(device) devctl(DEV_UNMAP, 0, device, 0)
  177 _PROTOTYPE( int devctl, (int ctl_req, int driver, int device, int style));
  178 
  179 /* For compatibility with other Unix systems */
  180 _PROTOTYPE( int getpagesize, (void)                                     );
  181 _PROTOTYPE( int setgroups, (int ngroups, const gid_t *gidset)           );
  182 
  183 #endif
  184 
  185 _PROTOTYPE( int readlink, (const char *, char *, int));
  186 _PROTOTYPE( int getopt, (int, char **, char *));
  187 extern int optind, opterr, optopt;
  188 
  189 #endif /* _UNISTD_H */

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