usr/src/lib/libbc/inc/include/sys/file.h

   1 /*
   2  * Copyright (c) 2001 by Sun Microsystems, Inc.
   3  * All rights reserved.
   4  */
   5
   6 /*
   7  * Copyright (c) 1982, 1986 Regents of the University of California.
   8  * All rights reserved.  The Berkeley software License Agreement
   9  * specifies the terms and conditions for redistribution.
  10  */
  11
  12 #ifndef __SYS_FILE_H
  13 #define __SYS_FILE_H
  14
  15 #pragma ident   "%Z%%M% %I%     %E% SMI"
  16
  17 #include <sys/types.h>
  18
  19 #ifdef  __cplusplus
  20 extern "C" {
  21 #endif
  22
  23 #ifdef  KERNEL
  24 /*
  25  * Descriptor table entry.
  26  * One for each kernel object.
  27  */
  28 struct  file {
  29         int     f_flag;         /* see below */
  30         short   f_type;         /* descriptor type */
  31         short   f_count;        /* reference count */
  32         short   f_msgcount;     /* references from message queue */
  33         struct  fileops {
  34                 int     (*fo_rw)();
  35                 int     (*fo_ioctl)();
  36                 int     (*fo_select)();
  37                 int     (*fo_close)();
  38         } *f_ops;
  39         caddr_t f_data;         /* ptr to file specific struct (vnode/socket) */
  40         off_t   f_offset;
  41         struct  ucred *f_cred;  /* credentials of user who opened file */
  42 };
  43
  44 struct  file *file, *fileNFILE;
  45 int     nfile;
  46 struct  file *getf();
  47 struct  file *falloc();
  48 #endif  /* KERNEL */
  49
  50 #include <sys/fcntlcom.h>
  51
  52 /*
  53  * bits to save after an open.  The no delay bits mean "don't wait for
  54  * carrier at open" in all cases.  Sys5 & POSIX save the no delay bits,
  55  * using them to also mean "don't block on reads"; BSD has you reset it
  56  * with an fcntl() if you want the "don't block on reads" behavior.
  57  */
  58 #define FMASK           (FREAD|FWRITE|FAPPEND|FSYNC|FNBIO|FNONBIO)
  59 #define FCNTLCANT       (FREAD|FWRITE|FMARK|FDEFER|FSHLOCK|FEXLOCK)
  60
  61 /*
  62  * User definitions.
  63  */
  64
  65 /*
  66  * Flock call.
  67  */
  68 #define LOCK_SH         1       /* shared lock */
  69 #define LOCK_EX         2       /* exclusive lock */
  70 #define LOCK_NB         4       /* don't block when locking */
  71 #define LOCK_UN         8       /* unlock */
  72
  73 /*
  74  * Access call.  Also maintained in unistd.h
  75  */
  76 #define F_OK            0       /* does file exist */
  77 #define X_OK            1       /* is it executable by caller */
  78 #define W_OK            2       /* writable by caller */
  79 #define R_OK            4       /* readable by caller */
  80
  81 /*
  82  * Lseek call.  Also maintained in 5include/stdio.h and sys/unistd.h as SEEK_*
  83  */
  84 #define L_SET           0       /* absolute offset */
  85 #define L_INCR          1       /* relative to current offset */
  86 #define L_XTND          2       /* relative to end of file */
  87
  88 #ifdef  KERNEL
  89 #define GETF(fp, fd) { \
  90         if ((fd) < 0 || (fd) > u.u_lastfile || \
  91             ((fp) = u.u_ofile[fd]) == NULL) { \
  92                 u.u_error = EBADF; \
  93                 return; \
  94         } \
  95 }
  96
  97 #define DTYPE_VNODE     1       /* file */
  98 #define DTYPE_SOCKET    2       /* communications endpoint */
  99 #endif  /* KERNEL */
 100
 101 #ifdef  __cplusplus
 102 }
 103 #endif
 104
 105 #endif  /* __SYS_FILE_H */