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one of the five strings "rw", "rq", "ro", "sw", "xx"
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(read-write, read-write with quota, read-only, swap, ignore).
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.pp
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the function
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.br setfsent ()
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opens the file when required and positions it at the first line.
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.pp
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the function
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.br getfsent ()
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parses the next line from the file.
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(after opening it when required.)
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.pp
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the function
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.br endfsent ()
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closes the file when required.
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.pp
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the function
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.br getfsspec ()
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searches the file from the start and returns the first entry found
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for which the
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.i fs_spec
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field matches the
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.i special_file
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argument.
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.pp
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the function
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.br getfsfile ()
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searches the file from the start and returns the first entry found
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for which the
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.i fs_file
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field matches the
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.i mount_point
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argument.
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.sh return value
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upon success, the functions
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.br getfsent (),
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.br getfsfile (),
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and
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.br getfsspec ()
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return a pointer to a
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.ir "struct fstab" ,
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while
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.br setfsent ()
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returns 1.
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upon failure or end-of-file, these functions return null and 0, respectively.
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.\" .sh history
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.\" the
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.\" .br getfsent ()
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.\" function appeared in 4.0bsd; the other four functions appeared in 4.3bsd.
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.sh attributes
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for an explanation of the terms used in this section, see
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.br attributes (7).
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.ad l
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.nh
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.ts
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allbox;
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lb lb lbx
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l l l.
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interface attribute value
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t{
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.br endfsent (),
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.br setfsent ()
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t} thread safety t{
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mt-unsafe race:fsent
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t}
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t{
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.br getfsent (),
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.br getfsspec (),
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.br getfsfile ()
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t} thread safety t{
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mt-unsafe race:fsent locale
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t}
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.te
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.hy
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.ad
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.sp 1
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.sh conforming to
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these functions are not in posix.1.
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several operating systems have them, for example,
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*bsd, sunos, digital unix, aix (which also has a
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.br getfstype ()).
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hp-ux has functions of the same names,
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that however use a
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.ir "struct checklist"
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instead of a
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.ir "struct fstab" ,
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and calls these functions obsolete, superseded by
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.br getmntent (3).
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.sh notes
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these functions are not thread-safe.
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.pp
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since linux allows mounting a block special device in several places,
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and since several devices can have the same mount point, where the
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last device with a given mount point is the interesting one,
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while
|
.br getfsfile ()
|
and
|
.br getfsspec ()
|
only return the first occurrence, these two functions are not suitable
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for use under linux.
|
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