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Linux 2.6 - man page for getfsfile (linux section 3)

GETFSENT(3)			    Linux Programmer's Manual			      GETFSENT(3)

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

SYNOPSIS
       #include <fstab.h>

       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 special_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, respectively.

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 getfstype()).  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       functions obsolete, superseded by getmntent(3).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 getfsfile() 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 3.55 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)


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