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    Command:

    getdirentries

    
         Standard C Library (libc, -lc)
    
    
    

    SYNOPSIS

         #include <sys/types.h>
         #include <dirent.h>
    
         int
         getdirentries(int fd, char *buf, int nbytes, long *basep);
    
         int
         getdents(int fd, char *buf, int nbytes);
    
    
    

    DESCRIPTION

         The getdirentries() and getdents() system calls read directory entries
         from the directory referenced by the file descriptor fd into the buffer
         pointed to by buf, in a file system independent format.  Up to nbytes of
         data will be transferred.  The nbytes argument must be greater than or
         equal to the block size associated with the file, see stat(2).  Some file
         systems may not support these system calls with buffers smaller than this
         size.
    
         The data in the buffer is a series of dirent structures each containing
         the following entries:
    
               u_int32_t d_fileno;
               u_int16_t d_reclen;
               u_int8_t  d_type;
               u_int8_t  d_namlen;
               char    d_name[MAXNAMELEN + 1]; /* see below */
    
         The d_fileno entry is a number which is unique for each distinct file in
         the file system.  Files that are linked by hard links (see link(2)) have
         the same d_fileno.  The d_reclen entry is the length, in bytes, of the
         directory record.  The d_type entry is the type of the file pointed to by
         the directory record.  The file type values are defined in
         <sys/dirent.h>.  The d_name entry contains a null terminated file name.
         The d_namlen entry specifies the length of the file name excluding the
         null byte.  Thus the actual size of d_name may vary from 1 to MAXNAMELEN
         + 1.
    
         Entries may be separated by extra space.  The d_reclen entry may be used
         as an offset from the start of a dirent structure to the next structure,
         if any.
    
         The actual number of bytes transferred is returned.  The current position
         pointer associated with fd is set to point to the next block of entries.
         The pointer may not advance by the number of bytes returned by
         getdirentries() or getdents().  A value of zero is returned when the end
         of the directory has been reached.
    
         The getdirentries() system call writes the position of the block read
         into the location pointed to by basep.  Alternatively, the current posi-
                            for reading.
    
         [EFAULT]           Either buf or basep point outside the allocated
                            address space.
    
         [EINVAL]           The file referenced by fd is not a directory, or
                            nbytes is too small for returning a directory entry or
                            block of entries, or the current position pointer is
                            invalid.
    
         [EIO]              An I/O error occurred while reading from or writing to
                            the file system.
    
    
    

    SEE ALSO

         lseek(2), open(2)
    
    
    

    HISTORY

         The getdirentries() system call first appeared in 4.4BSD.  The getdents()
         system call first appeared in FreeBSD 3.0.
    
    
    

    BSD May 3, 1995 BSD

    
    
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