headers/posix/fcntl.h

   1 /*
   2  * Copyright 2002-2012 Haiku, Inc. All Rights Reserved.
   3  * Distributed under the terms of the MIT License.
   4  */
   5 #ifndef _FCNTL_H
   6 #define _FCNTL_H
   7
   8
   9 #include <sys/types.h>
  10 #include <sys/stat.h>
  11 #include <unistd.h>
  12
  13
  14 /* commands that can be passed to fcntl() */
  15 #define F_DUPFD                 0x0001          /* duplicate fd */
  16 #define F_GETFD                 0x0002          /* get fd flags */
  17 #define F_SETFD                 0x0004          /* set fd flags */
  18 #define F_GETFL                 0x0008          /* get file status flags and access mode */
  19 #define F_SETFL                 0x0010          /* set file status flags */
  20 #define F_GETLK         0x0020          /* get locking information */
  21 #define F_SETLK         0x0080          /* set locking information */
  22 #define F_SETLKW        0x0100          /* as above, but waits if blocked */
  23 #define F_DUPFD_CLOEXEC 0x0200          /* duplicate fd with close on exec set */
  24
  25 /* advisory locking types */
  26 #define F_RDLCK         0x0040          /* read or shared lock */
  27 #define F_UNLCK         0x0200          /* unlock */
  28 #define F_WRLCK         0x0400          /* write or exclusive lock */
  29
  30 /* file descriptor flags for fcntl() */
  31 #define FD_CLOEXEC              1                       /* close on exec */
  32
  33 /* file access modes for open() */
  34 #define O_RDONLY                0x0000          /* read only */
  35 #define O_WRONLY                0x0001          /* write only */
  36 #define O_RDWR                  0x0002          /* read and write */
  37 #define O_ACCMODE       0x0003          /* mask to get the access modes above */
  38 #define O_RWMASK                O_ACCMODE
  39
  40 /* flags for open() */
  41 #define O_EXCL                  0x0100          /* exclusive creat */
  42 #define O_CREAT                 0x0200          /* create and open file */
  43 #define O_TRUNC                 0x0400          /* open with truncation */
  44 #define O_NOCTTY                0x1000          /* don't make tty the controlling tty */
  45 #define O_NOTRAVERSE    0x2000          /* do not traverse leaf link */
  46
  47 /* flags for open() and fcntl() */
  48 #define O_CLOEXEC               0x00000040      /* close on exec */
  49 #define O_NONBLOCK              0x00000080      /* non blocking io */
  50 #define O_NDELAY                O_NONBLOCK
  51 #define O_APPEND                0x00000800      /* to end of file */
  52 #define O_SYNC                  0x00010000      /* write synchronized I/O file integrity */
  53 #define O_RSYNC                 0x00020000      /* read synchronized I/O file integrity */
  54 #define O_DSYNC                 0x00040000      /* write synchronized I/O data integrity */
  55 #define O_NOFOLLOW              0x00080000      /* fail on symlinks */
  56 #define O_NOCACHE               0x00100000      /* do not use the file system cache if */
  57                                                                         /* possible */
  58 #define O_DIRECT                O_NOCACHE
  59 #define O_DIRECTORY             0x00200000      /* fail if not a directory */
  60
  61 /* flags for the *at() functions */
  62 #define AT_FDCWD                (-1)            /* CWD FD for the *at() functions */
  63
  64 #define AT_SYMLINK_NOFOLLOW     0x01    /* fstatat(), fchmodat(), fchownat(),
  65                                                                                 utimensat() */
  66 #define AT_SYMLINK_FOLLOW       0x02    /* linkat() */
  67 #define AT_REMOVEDIR            0x04    /* unlinkat() */
  68 #define AT_EACCESS                      0x08    /* faccessat() */
  69
  70 /* advisory file locking */
  71
  72 struct flock {
  73         short   l_type;
  74         short   l_whence;
  75         off_t   l_start;
  76         off_t   l_len;
  77         pid_t   l_pid;
  78 };
  79
  80
  81 #ifdef __cplusplus
  82 extern "C" {
  83 #endif
  84
  85 extern int      creat(const char *path, mode_t mode);
  86 extern int      open(const char *path, int openMode, ...);
  87         /* the third argument is the permissions of the created file when O_CREAT
  88            is passed in oflags */
  89 extern int      openat(int fd, const char *path, int openMode, ...);
  90
  91 extern int      fcntl(int fd, int op, ...);
  92
  93 #ifdef __cplusplus
  94 }
  95 #endif
  96
  97 #endif  /* _FCNTL_H */