GETFSENT(3)		   Linux Programmers Manual		  GETFSENT(3)



NAME
       getfsent,  getfsspec,  getfsfile,  setfsent,  endfsent  -  handle fstab
       entries

SYNOPSIS
       #include 

       void endfsent(void);

       struct fstab *getfsent(void);

       struct fstab *getfsfile(const char *mount_point);

       struct fstab *getfsspec(const char *special_file);

       int setfsent(void);

DESCRIPTION
       These functions read from the file /etc/fstab.	The  struct  fstab  is
       defined by:

	   struct fstab {
	       char	  *fs_spec;	  /* block device name */
	       char	  *fs_file;	  /* mount point */
	       char	  *fs_vfstype;	  /* file-sysem type */
	       char	  *fs_mntops;	  /* mount options */
	       const char *fs_type;	  /* rw/rq/ro/sw/xx option */
	       int	   fs_freq;	  /* dump frequency, in days */
	       int	   fs_passno;	  /* pass number on parallel dump */
	   };

       Here  the  field  fs_type  contains  (on a *BSD system) one of the five
       strings "rw", "rq",  "ro",  "sw",  "xx"	(read-write,  read-write  with
       quota, read-only, swap, ignore).

       The  function  setfsent() opens the file when required and positions it
       at the first line.

       The function getfsent() parses the next line  from  the	file.	(After
       opening it when required.)

       The function endfsent() closes the file when required.

       The  function  getfsspec() searches the file from the start and returns
       the first entry found for which the  fs_spec  field  matches  the  spe
       cial_file argument.

       The  function  getfsfile() searches the file from the start and returns
       the  first  entry  found  for  which  the  fs_file  field  matches  the
       mount_point argument.

RETURN VALUE
       Upon  success,  the  functions getfsent(), getfsfile(), and getfsspec()
       return a pointer to a struct fstab, while setfsent() returns  1.   Upon
       failure	or  end-of-file,  these  functions  return NULL and 0, respec
       tively.

CONFORMING TO
       These functions are not in  POSIX.1-2001.   Several  operating  systems
       have them, e.g., *BSD, SunOS, Digital Unix, AIX (which also has a getf
       stype()).  HP-UX has functions of the same names, that  however	use  a
       struct  checklist  instead of a struct fstab, and calls these functions
       obsolete, superseded by getmntent(3).

NOTES
       These functions are not thread-safe.

       Since Linux allows mounting a block special device in  several  places,
       and since several devices can have the same mount point, where the last
       device with a given mount point is the interesting  one,  while	getfs
       file()  and  getfsspec()  only  return  the first occurrence, these two
       functions are not suitable for use under Linux.

SEE ALSO
       getmntent(3), fstab(5)

COLOPHON
       This page is part of release 3.05 of the Linux  man-pages  project.   A
       description  of	the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.



GNU				  2002-02-28			   GETFSENT(3)