744 lines
18 KiB
Groff
744 lines
18 KiB
Groff
.\" Copyright (c) 1989, 1991 The Regents of the University of California.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" from: @(#)fts.3 5.21 (Berkeley) 3/5/92
|
|
.\" $Id: fts.3,v 1.4 1993/10/01 00:43:45 jtc Exp $
|
|
.\"
|
|
.Dd March 5, 1992
|
|
.Dt FTS 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm fts
|
|
.Nd traverse a file hierarchy
|
|
.Sh SYNOPSIS
|
|
.Fd #include <sys/types.h>
|
|
.Fd #include <sys/stat.h>
|
|
.Fd #include <fts.h>
|
|
.Ft FTS *
|
|
.Fn fts_open "char * const *path_argv" "int options" "int *compar(const FTSENT **, const FTSENT **)"
|
|
.Ft FTSENT *
|
|
.Fn fts_read "FTS *ftsp"
|
|
.Ft FTSENT *
|
|
.Fn fts_children "FTS *ftsp" "int options"
|
|
.Ft int
|
|
.Fn fts_set "FTS ftsp" "FTSENT *f" "int options"
|
|
.Ft int
|
|
.Fn fts_close "FTS *ftsp"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm fts
|
|
functions are provided for traversing
|
|
.Tn UNIX
|
|
file hierarchies.
|
|
A simple overview is that the
|
|
.Fn fts_open
|
|
function returns a ``handle'' on a file hierarchy, which is then supplied to
|
|
the other
|
|
.Nm fts
|
|
functions.
|
|
The function
|
|
.Fn fts_read
|
|
returns a pointer to a structure describing one of the files in the file
|
|
hierarchy.
|
|
The function
|
|
.Fn fts_children
|
|
returns a pointer to a linked list of structures, each of which describes
|
|
one of the files contained in a directory in the hierarchy.
|
|
In general, directories are visited two distinguishable times; in pre-order
|
|
(before any of their descendants are visited) and in post-order (after all
|
|
of their descendants have been visited).
|
|
Files are visited once.
|
|
It is possible to walk the hierarchy ``logically'' (ignoring symbolic links)
|
|
or physically (visiting symbolic links), order the walk of the hierarchy or
|
|
prune and/or re-visit portions of the hierarchy.
|
|
.Pp
|
|
Two structures are defined (and typedef'd) in the include file
|
|
.Aq Pa fts.h .
|
|
The first is
|
|
.Fa FTS ,
|
|
the structure that represents the file hierarchy itself.
|
|
The second is
|
|
.Fa FTSENT ,
|
|
the structure that represents a file in the file
|
|
hierarchy.
|
|
Normally, an
|
|
.Fa FTSENT
|
|
structure is returned for every file in the file
|
|
hierarchy.
|
|
In this manual page, ``file'' and
|
|
.Dq Fa FTSENT No structure
|
|
are generally
|
|
interchangeable.
|
|
The
|
|
.Fa FTSENT
|
|
structure contains at least the following fields, which are
|
|
described in greater detail below:
|
|
.Bd -literal
|
|
typedef struct _ftsent {
|
|
u_short fts_info; /* flags for FTSENT structure */
|
|
char *fts_accpath; /* access path */
|
|
char *fts_path; /* root path */
|
|
short fts_pathlen; /* strlen(fts_path) */
|
|
char *fts_name; /* file name */
|
|
short fts_namelen; /* strlen(fts_name) */
|
|
short fts_level; /* depth (\-1 to N) */
|
|
int fts_error; /* file errno */
|
|
long fts_number; /* local numeric value */
|
|
void *fts_pointer; /* local address value */
|
|
struct ftsent *fts_parent; /* parent directory */
|
|
struct ftsent *fts_link; /* next file structure */
|
|
struct ftsent *fts_cycle; /* cycle structure */
|
|
struct stat *fts_statp; /* stat(2) information */
|
|
} FTSENT;
|
|
.Ed
|
|
.Pp
|
|
These fields are defined as follows:
|
|
.Bl -tag -width "fts_namelen"
|
|
.It Fa fts_info
|
|
One of the following flags describing the returned
|
|
.Fa FTSENT
|
|
structure and
|
|
the file it represents.
|
|
With the exception of directories without errors
|
|
.Pq Dv FTS_D ,
|
|
all of these
|
|
entries are terminal, that is, they will not be revisited, nor will any
|
|
of their descendants be visited.
|
|
.Bl -tag -width FTS_DEFAULT
|
|
.It Dv FTS_D
|
|
A directory being visited in pre-order.
|
|
.It Dv FTS_DC
|
|
A directory that causes a cycle in the tree.
|
|
(The
|
|
.Fa fts_cycle
|
|
field of the
|
|
.Fa FTSENT
|
|
structure will be filled in as well.)
|
|
.It Dv FTS_DEFAULT
|
|
Any
|
|
.Fa FTSENT
|
|
structure that represents a file type not explicitly described
|
|
by one of the other
|
|
.Fa fts_info
|
|
values.
|
|
.It Dv FTS_DNR
|
|
A directory which cannot be read.
|
|
This is an error return, and the
|
|
.Fa fts_errno
|
|
field will be set to indicate what caused the error.
|
|
.It Dv FTS_DOT
|
|
A file named
|
|
.Ql \&.
|
|
or
|
|
.Ql ..
|
|
which was not specified as a file name to
|
|
.Fn fts_open
|
|
(see
|
|
.Dv FTS_SEEDOT ) .
|
|
.It Dv FTS_DP
|
|
A directory being visited in post-order.
|
|
The contents of the
|
|
.Fa FTSENT
|
|
structure will be unchanged from when
|
|
it was returned in pre-order, i.e. with the
|
|
.Fa fts_info
|
|
field set to
|
|
.Dv FTS_D .
|
|
.It Dv FTS_ERR
|
|
This is an error return, and the
|
|
.Fa fts_errno
|
|
field will be set to indicate what caused the error.
|
|
.It Dv FTS_F
|
|
A regular file.
|
|
.It Dv FTS_NS
|
|
A file for which no
|
|
.Xr stat 2
|
|
information was available.
|
|
The contents of the
|
|
.Fa fts_statp
|
|
field are undefined.
|
|
This is an error return, and the
|
|
.Fa fts_errno
|
|
field will be set to indicate what caused the error.
|
|
.It Dv FTS_NSOK
|
|
A file for which no
|
|
.Xr stat 2
|
|
information was requested.
|
|
The contents of the
|
|
.Fa fts_statp
|
|
field are undefined.
|
|
.It Dv FTS_SL
|
|
A symbolic link.
|
|
.It Dv FTS_SLNONE
|
|
A symbolic link with a non-existent target.
|
|
The contents of the
|
|
.Fa fts_statp
|
|
field reference the file characteristic information for the symbolic link
|
|
itself.
|
|
.El
|
|
.It Fa fts_accpath
|
|
A path for accessing the file from the current directory.
|
|
.It Fa fts_path
|
|
The path for the file relative to the root of the traversal.
|
|
This path contains the path specified to
|
|
.Fn fts_open
|
|
as a prefix.
|
|
.It Fa fts_pathlen
|
|
The length of the string referenced by
|
|
.Fa fts_path .
|
|
.It Fa fts_name
|
|
The name of the file.
|
|
.It Fa fts_namelen
|
|
The length of the string referenced by
|
|
.Fa fts_name .
|
|
.It Fa fts_level
|
|
The depth of the traversal, numbered from \-1 to N, where this file
|
|
was found.
|
|
The
|
|
.Fa FTSENT
|
|
structure representing the parent of the starting point (or root)
|
|
of the traversal is numbered \-1, and the
|
|
.Fa FTSENT
|
|
structure for the root
|
|
itself is numbered 0.
|
|
.It Fa fts_errno
|
|
Upon return of a
|
|
.Fa FTSENT
|
|
structure from the
|
|
.Fn fts_children
|
|
or
|
|
.Fn fts_read
|
|
functions, with its
|
|
.Fa fts_info
|
|
field set to
|
|
.Dv FTS_DNR ,
|
|
.Dv FTS_ERR
|
|
or
|
|
.Dv FTS_NS ,
|
|
the
|
|
.Fa fts_errno
|
|
field contains the value of the external variable
|
|
.Va errno
|
|
specifying the cause of the error.
|
|
Otherwise, the contents of the
|
|
.Fa fts_errno
|
|
field are undefined.
|
|
.It Fa fts_number
|
|
This field is provided for the use of the application program and is
|
|
not modified by the
|
|
.Nm fts
|
|
functions.
|
|
It is initialized to 0.
|
|
.It Fa fts_pointer
|
|
This field is provided for the use of the application program and is
|
|
not modified by the
|
|
.Nm fts
|
|
functions.
|
|
It is initialized to
|
|
.Dv NULL .
|
|
.It Fa fts_parent
|
|
A pointer to the
|
|
.Fa FTSENT
|
|
structure referencing the file in the hierarchy
|
|
immediately above the current file, i.e. the directory of which this
|
|
file is a member.
|
|
A parent structure for the initial entry point is provided as well,
|
|
however, only the
|
|
.Fa fts_level ,
|
|
.Fa fts_number
|
|
and
|
|
.Fa fts_pointer
|
|
fields are guaranteed to be initialized.
|
|
.It Fa fts_link
|
|
Upon return from the
|
|
.Fn fts_children
|
|
function, the
|
|
.Fa fts_link
|
|
field points to the next structure in the NULL-terminated linked list of
|
|
directory members.
|
|
Otherwise, the contents of the
|
|
.Fa fts_link
|
|
field are undefined.
|
|
.It Fa fts_cycle
|
|
If a directory causes a cycle in the hierarchy (see
|
|
.Dv FTS_DC ) ,
|
|
either because
|
|
of a hard link between two directories, or a symbolic link pointing to a
|
|
directory, the
|
|
.Fa fts_cycle
|
|
field of the structure will point to the
|
|
.Fa FTSENT
|
|
structure in the hierarchy that references the same file as the current
|
|
.Fa FTSENT
|
|
structure.
|
|
Otherwise, the contents of the
|
|
.Fa fts_cycle
|
|
field are undefined.
|
|
.It Fa fts_statp
|
|
A pointer to
|
|
.Xr stat 2
|
|
information for the file.
|
|
.El
|
|
.Pp
|
|
A single buffer is used for all of the paths of all of the files in the
|
|
file hierarchy.
|
|
Therefore, the
|
|
.Fa fts_path
|
|
and
|
|
.Fa fts_accpath
|
|
fields are guaranteed to be
|
|
.Dv NULL Ns -terminated
|
|
.Em only
|
|
for the file most recently returned by
|
|
.Fn fts_read .
|
|
To use these fields to reference any files represented by other
|
|
.Fa FTSENT
|
|
structures will require that the path buffer be modified using the
|
|
information contained in that
|
|
.Fa FTSENT
|
|
structure's
|
|
.Fa fts_pathlen
|
|
field.
|
|
Any such modifications should be undone before further calls to
|
|
.Fn fts_read
|
|
are attempted.
|
|
The
|
|
.Fa fts_name
|
|
field is always
|
|
.Dv NULL Ns -terminated.
|
|
.Sh FTS_OPEN
|
|
The
|
|
.Fn fts_open
|
|
function takes a pointer to an array of character pointers naming one
|
|
or more paths which make up a logical file hierarchy to be traversed.
|
|
The array must be terminated by a
|
|
.Dv NULL
|
|
pointer.
|
|
.Pp
|
|
There are
|
|
a number of options, at least one of which (either
|
|
.Dv FTS_LOGICAL
|
|
or
|
|
.Dv FTS_PHYSICAL )
|
|
must be specified.
|
|
The options are selected by
|
|
.Em or Ns 'ing
|
|
the following values:
|
|
.Bl -tag -width "FTS_PHYSICAL"
|
|
.It Dv FTS_COMFOLLOW
|
|
This option causes any symbolic link specified as a root path to be
|
|
followed immediately whether or not
|
|
.Dv FTS_LOGICAL
|
|
is also specified.
|
|
.It Dv FTS_LOGICAL
|
|
This option causes the
|
|
.Nm fts
|
|
routines to return
|
|
.Fa FTSENT
|
|
structures for the targets of symbolic links
|
|
instead of the symbolic links themselves.
|
|
If this option is set, the only symbolic links for which
|
|
.Fa FTSENT
|
|
structures
|
|
are returned to the application are those referencing non-existent files.
|
|
Either
|
|
.Dv FTS_LOGICAL
|
|
or
|
|
.Dv FTS_PHYSICAL
|
|
.Em must
|
|
be provided to the
|
|
.Fn fts_open
|
|
function.
|
|
.It Dv FTS_NOCHDIR
|
|
As a performance optimization, the
|
|
.Nm fts
|
|
functions change directories as they walk the file hierarchy.
|
|
This has the side-effect that an application cannot rely on being
|
|
in any particular directory during the traversal.
|
|
The
|
|
.Dv FTS_NOCHDIR
|
|
option turns off this optimization, and the
|
|
.Nm fts
|
|
functions will not change the current directory.
|
|
Note that applications should not themselves change their current directory
|
|
and try to access files unless
|
|
.Dv FTS_NOCHDIR
|
|
is specified and absolute
|
|
pathnames were provided as arguments to
|
|
.Fn fts_open .
|
|
.It Dv FTS_NOSTAT
|
|
By default, returned
|
|
.Fa FTSENT
|
|
structures reference file characteristic information (the
|
|
.Fa statp
|
|
field) for each file visited.
|
|
This option relaxes that requirement as a performance optimization,
|
|
allowing the
|
|
.Nm fts
|
|
functions to set the
|
|
.Fa fts_info
|
|
field to
|
|
.Dv FTS_NSOK
|
|
and leave the contents of the
|
|
.Fa statp
|
|
field undefined.
|
|
.It Dv FTS_PHYSICAL
|
|
This option causes the
|
|
.Nm fts
|
|
routines to return
|
|
.Fa FTSENT
|
|
structures for symbolic links themselves instead
|
|
of the target files they point to.
|
|
If this option is set,
|
|
.Fa FTSENT
|
|
structures for all symbolic links in the
|
|
hierarchy are returned to the application.
|
|
Either
|
|
.Dv FTS_LOGICAL
|
|
or
|
|
.Dv FTS_PHYSICAL
|
|
.Em must
|
|
be provided to the
|
|
.Fn fts_open
|
|
function.
|
|
.It Dv FTS_SEEDOT
|
|
By default, unless they are specified as path arguments to
|
|
.Fn fts_open ,
|
|
any files named
|
|
.Ql \&.
|
|
or
|
|
.Ql ..
|
|
encountered in the file hierarchy are ignored.
|
|
This option causes the
|
|
.Nm fts
|
|
routines to return
|
|
.Fa FTSENT
|
|
structures for them.
|
|
.It Dv FTS_XDEV
|
|
This option prevents
|
|
.Nm fts
|
|
from descending into directories that have a different device number
|
|
than the file from which the descent began.
|
|
.El
|
|
.Pp
|
|
The argument
|
|
.Fn compar
|
|
specifies a user-defined function which may be used to order the traversal
|
|
of the hierarchy.
|
|
It
|
|
takes two pointers to pointers to
|
|
.Fa FTSENT
|
|
structures as arguments and
|
|
should return a negative value, zero, or a positive value to indicate
|
|
if the file referenced by its first argument comes before, in any order
|
|
with respect to, or after, the file referenced by its second argument.
|
|
The
|
|
.Fa fts_accpath ,
|
|
.Fa fts_path
|
|
and
|
|
.Fa fts_pathlen
|
|
fields of the
|
|
.Fa FTSENT
|
|
structures may
|
|
.Em never
|
|
be used in this comparison.
|
|
If the
|
|
.Fa fts_info
|
|
field is set to
|
|
.Dv FTS_NS
|
|
or
|
|
.Dv FTS_NSOK ,
|
|
the
|
|
.Fa fts_statp
|
|
field may not either.
|
|
If the
|
|
.Fn compar
|
|
argument is
|
|
.Dv NULL ,
|
|
the directory traversal order is in the order listed in
|
|
.Fa path_argv
|
|
for the root paths, and in the order listed in the directory for
|
|
everything else.
|
|
.Sh FTS_READ
|
|
The
|
|
.Fn fts_read
|
|
function returns a pointer to an
|
|
.Fa FTSENT
|
|
structure describing a file in
|
|
the hierarchy.
|
|
Directories (that are readable and do not cause cycles) are visited at
|
|
least twice, once in pre-order and once in post-order.
|
|
All other files are visited at least once.
|
|
(Hard links between directories that do not cause cycles or symbolic
|
|
links to symbolic links may cause files to be visited more than once,
|
|
or directories more than twice.)
|
|
.Pp
|
|
If all the members of the hierarchy have been returned,
|
|
.Fn fts_read
|
|
returns
|
|
.Dv NULL
|
|
and sets the external variable
|
|
.Va errno
|
|
to 0.
|
|
If an error unrelated to a file in the hierarchy occurs,
|
|
.Fn fts_read
|
|
returns
|
|
.Dv NULL
|
|
and sets
|
|
.Va errno
|
|
appropriately.
|
|
If an error related to a returned file occurs, a pointer to an
|
|
.Fa FTSENT
|
|
structure is returned, and
|
|
.Va errno
|
|
may or may not have been set (see
|
|
.Fa fts_info ) .
|
|
.Pp
|
|
The
|
|
.Fa FTSENT
|
|
structures returned by
|
|
.Fn fts_read
|
|
may be overwritten after a call to
|
|
.Fn fts_close
|
|
on the same file hierarchy stream, or, after a call to
|
|
.Fn fts_read
|
|
on the same file hierarchy stream unless they represent a file of type
|
|
directory, in which case they will not be overwritten until after a call to
|
|
.Fn fts_read
|
|
after the
|
|
.Fa FTSENT
|
|
structure has been returned by the function
|
|
.Fn fts_read
|
|
in post-order.
|
|
.Sh FTS_CHILDREN
|
|
The
|
|
.Fn fts_children
|
|
function returns a pointer to an
|
|
.Fa FTSENT
|
|
structure describing the first entry in a NULL-terminated linked list of
|
|
the files in the directory represented by the
|
|
.Fa FTSENT
|
|
structure most recently returned by
|
|
.Fn fts_read .
|
|
The list is linked through the
|
|
.Fa fts_link
|
|
field of the
|
|
.Fa FTSENT
|
|
structure, and is ordered by the user-specified comparison function, if any.
|
|
Repeated calls to
|
|
.Fn fts_children
|
|
will recreate this linked list.
|
|
.Pp
|
|
As a special case, if
|
|
.Fn fts_read
|
|
has not yet been called for a hierarchy,
|
|
.Fn fts_children
|
|
will return a pointer to the files in the logical directory specified to
|
|
.Fn fts_open ,
|
|
i.e. the arguments specified to
|
|
.Fn fts_open .
|
|
Otherwise, if the
|
|
.Fa FTSENT
|
|
structure most recently returned by
|
|
.Fn fts_read
|
|
is not a directory being visited in pre-order,
|
|
or the directory does not contain any files,
|
|
.Fn fts_children
|
|
returns
|
|
.Dv NULL
|
|
and sets
|
|
.Va errno
|
|
to zero.
|
|
If an error occurs,
|
|
.Fn fts_children
|
|
returns
|
|
.Dv NULL
|
|
and sets
|
|
.Va errno
|
|
appropriately.
|
|
.Pp
|
|
The
|
|
.Fa FTSENT
|
|
structures returned by
|
|
.Fn fts_children
|
|
may be overwritten after a call to
|
|
.Fn fts_children ,
|
|
.Fn fts_close
|
|
or
|
|
.Fn fts_read
|
|
on the same file hierarchy stream.
|
|
.Pp
|
|
.Em Option
|
|
may be set to the following value:
|
|
.Bl -tag -width FTS_NAMEONLY
|
|
.It Dv FTS_NAMEONLY
|
|
Only the names of the files are needed.
|
|
The contents of all the fields in the returned linked list of structures
|
|
are undefined with the exception of the
|
|
.Fa fts_name
|
|
and
|
|
.Fa fts_namelen
|
|
fields.
|
|
.El
|
|
.Sh FTS_SET
|
|
The function
|
|
.Fn fts_set
|
|
allows the user application to determine further processing for the
|
|
file
|
|
.Fa f
|
|
of the stream
|
|
.Fa ftsp .
|
|
The
|
|
.Fn fts_set
|
|
function
|
|
returns 0 on success, and \-1 if an error occurs.
|
|
.Em Option
|
|
must be set to one of the following values:
|
|
.Bl -tag -width FTS_PHYSICAL
|
|
.It Dv FTS_AGAIN
|
|
Re-visit the file; any file type may be re-visited.
|
|
The next call to
|
|
.Fn fts_read
|
|
will return the referenced file.
|
|
The
|
|
.Fa fts_stat
|
|
and
|
|
.Fa fts_info
|
|
fields of the structure will be reinitialized at that time,
|
|
but no other fields will have been changed.
|
|
This option is meaningful only for the most recently returned
|
|
file from
|
|
.Fn fts_read .
|
|
Normal use is for post-order directory visits, where it causes the
|
|
directory to be re-visited (in both pre and post-order) as well as all
|
|
of its descendants.
|
|
.It Dv FTS_FOLLOW
|
|
The referenced file must be a symbolic link.
|
|
If the referenced file is the one most recently returned by
|
|
.Fn fts_read ,
|
|
the next call to
|
|
.Fn fts_read
|
|
returns the file with the
|
|
.Fa fts_info
|
|
and
|
|
.Fa fts_statp
|
|
fields reinitialized to reflect the target of the symbolic link instead
|
|
of the symbolic link itself.
|
|
If the file is one of those most recently returned by
|
|
.Fn fts_children ,
|
|
the
|
|
.Fa fts_info
|
|
and
|
|
.Fa fts_statp
|
|
fields of the structure, when returned by
|
|
.Fn fts_read ,
|
|
will reflect the target of the symbolic link instead of the symbolic link
|
|
itself.
|
|
In either case, if the target of the symbolic link does not exist the
|
|
fields of the returned structure will be unchanged and the
|
|
.Fa fts_info
|
|
field will be set to
|
|
.Dv FTS_SLNONE .
|
|
.Pp
|
|
If the target of the link is a directory, the pre-order return, followed
|
|
by the return of all of its descendants, followed by a post-order return,
|
|
is done.
|
|
.It Dv FTS_SKIP
|
|
No descendants of this file are visited.
|
|
The file may be one of those most recently returned by either
|
|
.Fn fts_children
|
|
or
|
|
.Fn fts_read .
|
|
.El
|
|
.Sh FTS_CLOSE
|
|
The
|
|
.Fn fts_close
|
|
function closes a file hierarchy stream
|
|
.Fa ftsp
|
|
and restores the current directory to the directory from which
|
|
.Fn fts_open
|
|
was called to open
|
|
.Fa ftsp .
|
|
The
|
|
.Fn fts_close
|
|
function
|
|
returns 0 on success, and \-1 if an error occurs.
|
|
.Sh ERRORS
|
|
The function
|
|
.Fn fts_open
|
|
may fail and set
|
|
.Va errno
|
|
for any of the errors specified for the library functions
|
|
.Xr open 2
|
|
and
|
|
.Xr malloc 3 .
|
|
.Pp
|
|
The function
|
|
.Fn fts_close
|
|
may fail and set
|
|
.Va errno
|
|
for any of the errors specified for the library functions
|
|
.Xr chdir 2
|
|
and
|
|
.Xr close 2 .
|
|
.Pp
|
|
The functions
|
|
.Fn fts_read
|
|
and
|
|
.Fn fts_children
|
|
may fail and set
|
|
.Va errno
|
|
for any of the errors specified for the library functions
|
|
.Xr chdir 2 ,
|
|
.Xr malloc 3 ,
|
|
.Xr opendir 3 ,
|
|
.Xr readdir 3
|
|
and
|
|
.Xr stat 2 .
|
|
.Pp
|
|
In addition,
|
|
.Fn fts_children ,
|
|
.Fn fts_open
|
|
and
|
|
.Fn fts_set
|
|
may fail and set
|
|
.Va errno
|
|
as follows:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EINVAL
|
|
The options were invalid.
|
|
.EL
|
|
.Sh SEE ALSO
|
|
.Xr find 1 ,
|
|
.Xr chdir 2 ,
|
|
.Xr stat 2 ,
|
|
.Xr qsort 3
|