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+.\" (c) 1993 by Thomas Koenig (ig25@rz.uni-karlsruhe.de)
+.\"
+.\" Permission is granted to make and distribute verbatim copies of this
+.\" manual provided the copyright notice and this permission notice are
+.\" preserved on all copies.
+.\"
+.\" Permission is granted to copy and distribute modified versions of this
+.\" manual under the conditions for verbatim copying, provided that the
+.\" entire resulting derived work is distributed under the terms of a
+.\" permission notice identical to this one.
+.\" 
+.\" Since the Linux kernel and libraries are constantly changing, this
+.\" manual page may be incorrect or out-of-date.  The author(s) assume no
+.\" responsibility for errors or omissions, or for damages resulting from
+.\" the use of the information contained herein.  The author(s) may not
+.\" have taken the same level of care in the production of this manual,
+.\" which is licensed free of charge, as they might when working
+.\" professionally.
+.\" 
+.\" Formatted or processed versions of this manual, if unaccompanied by
+.\" the source, must acknowledge the copyright and authors of this work.
+.\" License.
+.\" Modified Wed Jul 28 11:12:26 1993 by Rik Faith (faith@cs.unc.edu)
+.TH FPATHCONF 3  1993-04-04 "GNU" "Linux Programmer's Manual"
+.SH NAME
+fpathconf, pathconf \- get configuration values for files
+.SH SYNOPSIS
+.nf
+.B #include <unistd.h>
+.sp
+.BI "long fpathconf(int " filedes ", int " name );
+.nl
+.BI "long pathconf(char *" path ", int " name );
+.fi
+.SH DESCRIPTION
+.B fpathconf()
+gets a value for the configuration option
+.I name
+for the open file descriptor
+.IR filedes .
+.PP
+.B pathconf()
+gets a value for configuration option
+.I name
+for the file name
+.IR path .
+.PP
+The corresponding macros defined in
+.B <unistd.h>
+are minimum values; if an application wants to take advantage of values
+which may change, a call to
+.B fpathconf()
+or
+.B pathconf()
+can be made, which may yield more liberal results.
+.PP
+Setting
+.I name
+equal to one of the following constants returns the following
+configuration options:
+.TP
+.B _PC_LINK_MAX
+returns the maximum number of links to the file.  If
+.I filedes
+or
+.I path
+refer to a directory, then the value applies to the whole directory.
+The corresponding macro is
+.BR _POSIX_LINK_MAX .
+.TP
+.B _PC_MAX_CANON
+returns the maximum length of a formatted input line, where
+.I filedes
+or
+.I path
+must refer to a terminal.
+The corresponding macro is
+.BR _POSIX_MAX_CANON .
+.TP
+.B _PC_MAX_INPUT
+returns the maximum length of an input line, where
+.I filedes
+or
+.I path
+must refer to a terminal.
+The corresponding macro is
+.BR _POSIX_MAX_INPUT .
+.TP
+.B _PC_NAME_MAX
+returns the maximum length of a filename in the directory
+.I path
+or
+.IR filedes .
+the process is allowed to create.
+The corresponding macro is
+.BR _POSIX_NAME_MAX .
+.TP
+.B _PC_PATH_MAX
+returns the maximum length of a relative pathname when
+.I path
+or
+.I filedes
+is the current working directory.  The corresponding macro is
+.BR _POSIX_PATH_MAX .
+.TP
+.B _PC_PIPE_BUF
+returns the size of the pipe buffer, where
+.I filedes
+must refer to a pipe or FIFO and
+.I path
+must refer to a FIFO. The corresponding macro is
+.BR _POSIX_PIPE_BUF .
+.TP
+.B _PC_CHOWN_RESTRICTED
+returns nonzero if the
+.BR chown (2)
+call may not be used on this file.  If
+.I filedes
+or
+.I path
+refer to a directory, then this applies to all files in that
+directory.  The corresponding macro is
+.BR _POSIX_CHOWN_RESTRICTED .
+.TP
+.B _PC_NO_TRUNC
+returns nonzero if accessing filenames longer than
+.B _POSIX_NAME_MAX
+generates an error.  The corresponding macro is
+.BR _POSIX_NO_TRUNC .
+.TP
+.B _PC_VDISABLE
+returns nonzero if special character processing can be disabled, where
+.I filedes
+or
+.I path
+must refer to a terminal.
+.SH "RETURN VALUE"
+The limit is returned, if one exists.  If the system does not have a
+limit for the requested resource, \-1 is returned, and
+.I errno
+is unchanged.  If there is an error, \-1 is returned, and
+.I errno
+is set to reflect the nature of the error.
+.SH "CONFORMING TO"
+POSIX.1
+.SH NOTES
+Files with name lengths longer than the value returned for
+.I name
+equal to
+.B _PC_NAME_MAX
+may exist in the given directory.
+.PP
+Some returned values may be huge; they are not suitable for allocating
+memory.
+.SH "SEE ALSO"
+.BR getconf (1),
+.BR open (2),
+.BR statfs (2),
+.BR sysconf (3)