2008-07-08 14:32:54 +00:00
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.\" Copyright (c) 1993 by Thomas Koenig (ig25@rz.uni-karlsruhe.de)
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2004-11-03 13:51:07 +00:00
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.\"
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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2007-04-12 22:42:49 +00:00
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.\"
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2004-11-03 13:51:07 +00:00
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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2007-04-12 22:42:49 +00:00
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.\"
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2004-11-03 13:51:07 +00:00
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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\" License.
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.\" Modified Wed Jul 28 11:12:26 1993 by Rik Faith (faith@cs.unc.edu)
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.TH FPATHCONF 3 1993-04-04 "GNU" "Linux Programmer's Manual"
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.SH NAME
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fpathconf, pathconf \- get configuration values for files
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.SH SYNOPSIS
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.nf
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.B #include <unistd.h>
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.sp
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2007-12-23 21:56:27 +00:00
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.BI "long fpathconf(int " fd ", int " name );
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2006-07-20 16:16:51 +00:00
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.br
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2004-11-03 13:51:07 +00:00
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.BI "long pathconf(char *" path ", int " name );
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.fi
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.SH DESCRIPTION
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2005-10-19 07:07:02 +00:00
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.BR fpathconf ()
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2004-11-03 13:51:07 +00:00
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gets a value for the configuration option
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.I name
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for the open file descriptor
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2007-12-23 21:56:27 +00:00
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.IR fd .
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2004-11-03 13:51:07 +00:00
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.PP
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2005-10-19 07:07:02 +00:00
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.BR pathconf ()
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2004-11-03 13:51:07 +00:00
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gets a value for configuration option
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.I name
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2006-02-12 22:15:41 +00:00
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for the filename
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2004-11-03 13:51:07 +00:00
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.IR path .
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.PP
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The corresponding macros defined in
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2005-11-03 12:47:27 +00:00
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.I <unistd.h>
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2004-11-03 13:51:07 +00:00
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are minimum values; if an application wants to take advantage of values
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which may change, a call to
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2005-10-19 07:07:02 +00:00
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.BR fpathconf ()
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2004-11-03 13:51:07 +00:00
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or
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2005-10-19 07:07:02 +00:00
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.BR pathconf ()
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2004-11-03 13:51:07 +00:00
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can be made, which may yield more liberal results.
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.PP
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Setting
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.I name
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equal to one of the following constants returns the following
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configuration options:
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.TP
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.B _PC_LINK_MAX
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2007-04-12 22:42:49 +00:00
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returns the maximum number of links to the file.
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If
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2007-12-23 21:56:27 +00:00
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.I fd
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2004-11-03 13:51:07 +00:00
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or
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.I path
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refer to a directory, then the value applies to the whole directory.
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The corresponding macro is
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.BR _POSIX_LINK_MAX .
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.TP
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.B _PC_MAX_CANON
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returns the maximum length of a formatted input line, where
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2007-12-23 21:56:27 +00:00
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.I fd
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2004-11-03 13:51:07 +00:00
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or
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.I path
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must refer to a terminal.
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The corresponding macro is
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.BR _POSIX_MAX_CANON .
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.TP
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.B _PC_MAX_INPUT
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returns the maximum length of an input line, where
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2007-12-23 21:56:27 +00:00
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.I fd
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2004-11-03 13:51:07 +00:00
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or
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.I path
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must refer to a terminal.
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The corresponding macro is
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.BR _POSIX_MAX_INPUT .
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.TP
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.B _PC_NAME_MAX
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returns the maximum length of a filename in the directory
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.I path
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or
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2008-04-18 15:52:17 +00:00
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.IR fd
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that the process is allowed to create.
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2004-11-03 13:51:07 +00:00
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The corresponding macro is
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.BR _POSIX_NAME_MAX .
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.TP
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.B _PC_PATH_MAX
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returns the maximum length of a relative pathname when
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.I path
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or
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2007-12-23 21:56:27 +00:00
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.I fd
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2007-04-12 22:42:49 +00:00
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is the current working directory.
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The corresponding macro is
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2004-11-03 13:51:07 +00:00
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.BR _POSIX_PATH_MAX .
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.TP
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.B _PC_PIPE_BUF
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returns the size of the pipe buffer, where
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2007-12-23 21:56:27 +00:00
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.I fd
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2004-11-03 13:51:07 +00:00
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must refer to a pipe or FIFO and
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.I path
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2007-04-24 16:44:51 +00:00
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must refer to a FIFO.
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The corresponding macro is
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2004-11-03 13:51:07 +00:00
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.BR _POSIX_PIPE_BUF .
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.TP
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.B _PC_CHOWN_RESTRICTED
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intro.1, time.1, adjtimex.2, capget.2, eventfd.2, fcntl.2, getrlimit.2, getsockopt.2, gettimeofday.2, intro.2, ioctl_list.2, ioperm.2, mlock.2, pivot_root.2, poll.2, prctl.2, ptrace.2, sched_setscheduler.2, select_tut.2, semget.2, sigaltstack.2, signalfd.2, sysctl.2, timer_settime.2, timerfd_create.2, wait.2, CPU_SET.3, argz_add.3, assert_perror.3, atexit.3, backtrace.3, bcmp.3, clearenv.3, ctime.3, dl_iterate_phdr.3, dlopen.3, ecvt.3, errno.3, error.3, ether_aton.3, exit.3, fenv.3, ferror.3, finite.3, flockfile.3, fnmatch.3, fpathconf.3, fpclassify.3, ftime.3, ftok.3, ftw.3, fwide.3, getaddrinfo.3, gethostbyname.3, getlogin.3, getnameinfo.3, getnetent.3, getopt.3, getprotoent.3, getrpcent.3, getservent.3, glob.3, hsearch.3, inet.3, isalpha.3, iswalnum.3, iswalpha.3, iswblank.3, iswcntrl.3, iswctype.3, iswdigit.3, iswgraph.3, iswlower.3, iswprint.3, iswpunct.3, iswspace.3, iswupper.3, iswxdigit.3, longjmp.3, lsearch.3, malloc.3, matherr.3, mblen.3, mbsinit.3, mbtowc.3, on_exit.3, printf.3, pthread_attr_init.3, pthread_attr_setaffinity_np.3, pthread_attr_setdetachstate.3, pthread_attr_setguardsize.3, pthread_attr_setinheritsched.3, pthread_attr_setschedparam.3, pthread_attr_setschedpolicy.3, pthread_attr_setscope.3, pthread_attr_setstack.3, pthread_attr_setstackaddr.3, pthread_attr_setstacksize.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_equal.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_setaffinity_np.3, pthread_setcancelstate.3, pthread_setconcurrency.3, pthread_setschedparam.3, pthread_setschedprio.3, ptsname.3, putenv.3, putgrent.3, raise.3, rcmd.3, regex.3, rexec.3, rpc.3, rpmatch.3, rtnetlink.3, scandir.3, sem_init.3, setaliasent.3, setbuf.3, setenv.3, setjmp.3, signbit.3, stdio_ext.3, strtod.3, strtol.3, strtoul.3, system.3, termios.3, timeradd.3, tzset.3, ualarm.3, wctomb.3, xdr.3, st.4, tty_ioctl.4, core.5, elf.5, proc.5, bootparam.7, capabilities.7, icmp.7, ip.7, ipv6.7, math_error.7, mdoc.samples.7, mq_overview.7, pthreads.7, raw.7, regex.7, socket.7, tcp.7, tzselect.8: Global fix: s/non-zero/nonzero/
The tendency in English, as prescribed in style guides like
Chicago MoS, is towards removing hyphens after prefixes
like "non-" etc.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2010-01-16 16:40:55 +00:00
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returns nonzero if the
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2004-11-03 13:51:07 +00:00
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.BR chown (2)
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2007-04-12 22:42:49 +00:00
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call may not be used on this file.
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If
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2007-12-23 21:56:27 +00:00
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.I fd
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2004-11-03 13:51:07 +00:00
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or
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.I path
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refer to a directory, then this applies to all files in that
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2007-04-12 22:42:49 +00:00
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directory.
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The corresponding macro is
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2004-11-03 13:51:07 +00:00
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.BR _POSIX_CHOWN_RESTRICTED .
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.TP
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.B _PC_NO_TRUNC
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intro.1, time.1, adjtimex.2, capget.2, eventfd.2, fcntl.2, getrlimit.2, getsockopt.2, gettimeofday.2, intro.2, ioctl_list.2, ioperm.2, mlock.2, pivot_root.2, poll.2, prctl.2, ptrace.2, sched_setscheduler.2, select_tut.2, semget.2, sigaltstack.2, signalfd.2, sysctl.2, timer_settime.2, timerfd_create.2, wait.2, CPU_SET.3, argz_add.3, assert_perror.3, atexit.3, backtrace.3, bcmp.3, clearenv.3, ctime.3, dl_iterate_phdr.3, dlopen.3, ecvt.3, errno.3, error.3, ether_aton.3, exit.3, fenv.3, ferror.3, finite.3, flockfile.3, fnmatch.3, fpathconf.3, fpclassify.3, ftime.3, ftok.3, ftw.3, fwide.3, getaddrinfo.3, gethostbyname.3, getlogin.3, getnameinfo.3, getnetent.3, getopt.3, getprotoent.3, getrpcent.3, getservent.3, glob.3, hsearch.3, inet.3, isalpha.3, iswalnum.3, iswalpha.3, iswblank.3, iswcntrl.3, iswctype.3, iswdigit.3, iswgraph.3, iswlower.3, iswprint.3, iswpunct.3, iswspace.3, iswupper.3, iswxdigit.3, longjmp.3, lsearch.3, malloc.3, matherr.3, mblen.3, mbsinit.3, mbtowc.3, on_exit.3, printf.3, pthread_attr_init.3, pthread_attr_setaffinity_np.3, pthread_attr_setdetachstate.3, pthread_attr_setguardsize.3, pthread_attr_setinheritsched.3, pthread_attr_setschedparam.3, pthread_attr_setschedpolicy.3, pthread_attr_setscope.3, pthread_attr_setstack.3, pthread_attr_setstackaddr.3, pthread_attr_setstacksize.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_equal.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_setaffinity_np.3, pthread_setcancelstate.3, pthread_setconcurrency.3, pthread_setschedparam.3, pthread_setschedprio.3, ptsname.3, putenv.3, putgrent.3, raise.3, rcmd.3, regex.3, rexec.3, rpc.3, rpmatch.3, rtnetlink.3, scandir.3, sem_init.3, setaliasent.3, setbuf.3, setenv.3, setjmp.3, signbit.3, stdio_ext.3, strtod.3, strtol.3, strtoul.3, system.3, termios.3, timeradd.3, tzset.3, ualarm.3, wctomb.3, xdr.3, st.4, tty_ioctl.4, core.5, elf.5, proc.5, bootparam.7, capabilities.7, icmp.7, ip.7, ipv6.7, math_error.7, mdoc.samples.7, mq_overview.7, pthreads.7, raw.7, regex.7, socket.7, tcp.7, tzselect.8: Global fix: s/non-zero/nonzero/
The tendency in English, as prescribed in style guides like
Chicago MoS, is towards removing hyphens after prefixes
like "non-" etc.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2010-01-16 16:40:55 +00:00
|
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returns nonzero if accessing filenames longer than
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2004-11-03 13:51:07 +00:00
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.B _POSIX_NAME_MAX
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2007-04-12 22:42:49 +00:00
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generates an error.
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The corresponding macro is
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2004-11-03 13:51:07 +00:00
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.BR _POSIX_NO_TRUNC .
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.TP
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.B _PC_VDISABLE
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intro.1, time.1, adjtimex.2, capget.2, eventfd.2, fcntl.2, getrlimit.2, getsockopt.2, gettimeofday.2, intro.2, ioctl_list.2, ioperm.2, mlock.2, pivot_root.2, poll.2, prctl.2, ptrace.2, sched_setscheduler.2, select_tut.2, semget.2, sigaltstack.2, signalfd.2, sysctl.2, timer_settime.2, timerfd_create.2, wait.2, CPU_SET.3, argz_add.3, assert_perror.3, atexit.3, backtrace.3, bcmp.3, clearenv.3, ctime.3, dl_iterate_phdr.3, dlopen.3, ecvt.3, errno.3, error.3, ether_aton.3, exit.3, fenv.3, ferror.3, finite.3, flockfile.3, fnmatch.3, fpathconf.3, fpclassify.3, ftime.3, ftok.3, ftw.3, fwide.3, getaddrinfo.3, gethostbyname.3, getlogin.3, getnameinfo.3, getnetent.3, getopt.3, getprotoent.3, getrpcent.3, getservent.3, glob.3, hsearch.3, inet.3, isalpha.3, iswalnum.3, iswalpha.3, iswblank.3, iswcntrl.3, iswctype.3, iswdigit.3, iswgraph.3, iswlower.3, iswprint.3, iswpunct.3, iswspace.3, iswupper.3, iswxdigit.3, longjmp.3, lsearch.3, malloc.3, matherr.3, mblen.3, mbsinit.3, mbtowc.3, on_exit.3, printf.3, pthread_attr_init.3, pthread_attr_setaffinity_np.3, pthread_attr_setdetachstate.3, pthread_attr_setguardsize.3, pthread_attr_setinheritsched.3, pthread_attr_setschedparam.3, pthread_attr_setschedpolicy.3, pthread_attr_setscope.3, pthread_attr_setstack.3, pthread_attr_setstackaddr.3, pthread_attr_setstacksize.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_equal.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_setaffinity_np.3, pthread_setcancelstate.3, pthread_setconcurrency.3, pthread_setschedparam.3, pthread_setschedprio.3, ptsname.3, putenv.3, putgrent.3, raise.3, rcmd.3, regex.3, rexec.3, rpc.3, rpmatch.3, rtnetlink.3, scandir.3, sem_init.3, setaliasent.3, setbuf.3, setenv.3, setjmp.3, signbit.3, stdio_ext.3, strtod.3, strtol.3, strtoul.3, system.3, termios.3, timeradd.3, tzset.3, ualarm.3, wctomb.3, xdr.3, st.4, tty_ioctl.4, core.5, elf.5, proc.5, bootparam.7, capabilities.7, icmp.7, ip.7, ipv6.7, math_error.7, mdoc.samples.7, mq_overview.7, pthreads.7, raw.7, regex.7, socket.7, tcp.7, tzselect.8: Global fix: s/non-zero/nonzero/
The tendency in English, as prescribed in style guides like
Chicago MoS, is towards removing hyphens after prefixes
like "non-" etc.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2010-01-16 16:40:55 +00:00
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returns nonzero if special character processing can be disabled, where
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2007-12-23 21:56:27 +00:00
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.I fd
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2004-11-03 13:51:07 +00:00
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or
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.I path
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must refer to a terminal.
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.SH "RETURN VALUE"
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2007-04-12 22:42:49 +00:00
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The limit is returned, if one exists.
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If the system does not have a
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2004-11-03 13:51:07 +00:00
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limit for the requested resource, \-1 is returned, and
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.I errno
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2007-04-12 22:42:49 +00:00
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is unchanged.
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If there is an error, \-1 is returned, and
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2004-11-03 13:51:07 +00:00
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.I errno
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is set to reflect the nature of the error.
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.SH "CONFORMING TO"
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2006-08-04 12:39:17 +00:00
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POSIX.1-2001.
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2004-11-03 13:51:07 +00:00
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.SH NOTES
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Files with name lengths longer than the value returned for
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.I name
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equal to
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.B _PC_NAME_MAX
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may exist in the given directory.
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.PP
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Some returned values may be huge; they are not suitable for allocating
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memory.
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.SH "SEE ALSO"
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.BR getconf (1),
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.BR open (2),
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.BR statfs (2),
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.BR sysconf (3)
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