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

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 #pragma ident   "%Z%%M% %I%     %E% SMI"
  23
  24 /*
  25  * Filesystem-independent directory information.
  26  * Directory entry structures are of variable length.
  27  * Each directory entry is a struct direct containing its file number, the
  28  * offset of the next entry (a cookie interpretable only the filesystem
  29  * type that generated it), the length of the entry, and the length of the
  30  * name contained in the entry.  These are followed by the name. The
  31  * entire entry is padded with null bytes to a 4 byte boundary. All names
  32  * are guaranteed null terminated. The maximum length of a name in a
  33  * directory is MAXNAMLEN, plus a null byte.
  34  * Note: this file is present only for backwards compatibility. It is superseded
  35  * by the files /usr/include/dirent.h and /usr/include/sys/dirent.h. It will
  36  * disappear in a future major release.
  37  */
  38
  39 #ifndef _sys_dir_h
  40 #define _sys_dir_h
  41
  42 #define MAXNAMLEN       255
  43
  44 struct  direct {
  45         off_t   d_off;                  /* offset of next disk directory entry */
  46         u_long  d_fileno;               /* file number of entry */
  47         u_short d_reclen;               /* length of this record */
  48         u_short d_namlen;               /* length of string in d_name */
  49         char    d_name[MAXNAMLEN + 1];  /* name (up to MAXNAMLEN + 1) */
  50 };
  51
  52 /*
  53  * The macro DIRSIZ(dp) gives the minimum amount of space required to represent
  54  * a directory entry.  For any directory entry dp->d_reclen >= DIRSIZ(dp).
  55  * Specific filesystem typesm may use this macro to construct the value
  56  * for d_reclen.
  57  */
  58 #undef DIRSIZ
  59 #define DIRSIZ(dp)  \
  60         (((sizeof (struct direct) - (MAXNAMLEN+1) + ((dp)->d_namlen+1)) + 3) & ~3)
  61
  62 #ifndef KERNEL
  63 #define d_ino   d_fileno                /* compatability */
  64
  65
  66 /*
  67  * Definitions for library routines operating on directories.
  68  */
  69
  70 typedef struct _dirdesc {
  71         int     dd_fd;                  /* file descriptor */
  72         long    dd_loc;             /* buf offset of entry from last readddir() */
  73         long    dd_size;                /* amount of valid data in buffer */
  74         long    dd_bsize;               /* amount of entries read at a time */
  75         long    dd_off;                 /* Current offset in dir (for telldir) */
  76         char    *dd_buf;                /* directory data buffer */
  77 } DIR;
  78
  79 #ifndef NULL
  80 #define NULL 0
  81 #endif
  82 extern  DIR *opendir();
  83 extern  struct direct *readdir();
  84 extern  long telldir();
  85 extern  void seekdir();
  86 #define rewinddir(dirp) seekdir((dirp), (long)0)
  87 extern  int closedir();
  88 #endif
  89
  90 #endif /*!_sys_dir_h*/