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getdirentries(2)
NAME
  getdirentries - Get directory entries in a file-system independent format.

SYNOPSIS
  #include <dirent.h>

  int getdirentries(
	  int fd,
	  char *buf,
	  int nbytes,
	  long *basep );

PARAMETERS
  fd	  Specifies the file descriptor of a directory to be read.

  buf	  Points to a buffer containing the directory entries as dirent
	  structures.

  nbytes  Specifies the maximum amount of data to be transferred, in bytes.

  basep	  Points to the position of the block read.

DESCRIPTION
  The getdirentries() function reads directory entries from a directory into
  a buffer. The entries are returned as dirent structures, a file-system
  independent format.

				    Caution

       This call is not the POSIX-defined way to process directory entries.
       For POSIX interfaces, use the opendir(), readdir(), and closedir()
       library routines for reading and interpreting directory entries.

  The nbytes parameter should be greater than or equal to the block size
  associated with the file. (See stat(2).) Some file systems do not support
  the getdirentries() function with buffers smaller than this size.

  The entries returned by the getdirentries() function into the location
  pointed to by buf can be separated by extra space.

  The getdirentries() function writes the position of the block read into the
  location pointed to by the basep parameter. Alternatively, the current
  position pointer can be set and retrieved by lseek(). The current position
  pointer should only be set to a value returned by lseek(), a value returned
  in the location pointed to by basep, or 0 (zero).

  Upon successful completion, the actual number of bytes transferred is
  returned and the current position pointer associated with the fd parameter
  is set to point to the next block of entries. The file descriptor pointer
  might not advance by the same number of bytes returned by the
  getdirentries() function. A value of 0 (zero) is returned when the end of
  the directory has been reached.

RETURN VALUES
  Upon successful completion, the actual number of bytes transferred is
  returned. Otherwise, -1 is returned and errno is set to indicate the error.

ERRORS
  If the getdirentries() function fails, errno is set to one of the following
  values:

  [EBADF] The fd parameter is not a valid file descriptor open for reading.

  [EFAULT]
	  Either the buf or basep parameter points outside the allocated
	  address space.

  [EINVAL]
	  Either the fd parameter is not a valid file descriptor for a
	  directory or the buffer is too small.

  [EIO]	  An I/O error occurred while the operating system was reading from
	  or writing to the file system.

SEE ALSO
  Functions: lseek(2), open(2), stat(2), closedir(3), opendir(3), readdir(3)

Index for Section 2

Alphabetical listing for G

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