nt/inc/unistd.h

   1 /* Fake unistd.h: config.h already provides most of the relevant things. */
   2
   3 #ifndef _UNISTD_H
   4 #define _UNISTD_H
   5
   6 /* On Microsoft platforms, <stdlib.h> declares 'environ'; on POSIX
   7    platforms, <unistd.h> does.  Every file in Emacs that includes
   8    <unistd.h> also includes <stdlib.h>, so there's no need to declare
   9    'environ' here.  */
  10
  11 /* Provide prototypes of library functions that are emulated on w32
  12    and whose prototypes are usually found in unistd.h on POSIX
  13    platforms.  */
  14 extern ssize_t readlink (const char *, char *, size_t);
  15 extern int symlink (char const *, char const *);
  16 extern int setpgid (pid_t, pid_t);
  17 extern pid_t getpgrp (void);
  18 extern pid_t setsid (void);
  19 extern pid_t tcgetpgrp (int);
  20
  21 extern int faccessat (int, char const *, int, int);
  22
  23 /* These are normally on fcntl.h, but we don't override that header.  */
  24 /* Use values compatible with gnulib, as there's no reason to differ.  */
  25 #define AT_FDCWD (-3041965)
  26 #define AT_EACCESS 4
  27 #define AT_SYMLINK_NOFOLLOW 4096
  28
  29 /* Here are some more fcntl.h macros that default to gnulib-compatible
  30    values.  Include <fcntl.h> first, to make sure we don't override
  31    its values if any.  FIXME: If we know <fcntl.h> does not define
  32    O_NOCTTY and O_RDWR, this can be replaced with a simple "#define
  33    O_NOCTTY 0" and "#define O_RDWR 2".  */
  34 #include <fcntl.h>
  35 #ifndef O_NOCTTY
  36 #define O_NOCTTY 0
  37 #endif
  38 #ifndef O_RDWR
  39 #define O_RDWR 2
  40 #endif
  41
  42 #endif  /* _UNISTD_H */