long fpathconf(int fd, int name);
long pathconf(char *path, int name);
fpathconf() gets a value for the configuration option name for the open
file descriptor fd.
pathconf() gets a value for configuration option name for the filename
The corresponding macros defined in <unistd.h> are minimum values; if
an application wants to take advantage of values which may change, a
call to fpathconf() or pathconf() can be made, which may yield more
Setting name equal to one of the following constants returns the fol-
lowing configuration options:
returns the maximum number of links to the file. If fd or path
refer to a directory, then the value applies to the whole direc-
tory. The corresponding macro is _POSIX_LINK_MAX.
returns the maximum length of a formatted input line, where fd
or path must refer to a terminal. The corresponding macro is
returns the maximum length of an input line, where fd or path
must refer to a terminal. The corresponding macro is
returns the maximum length of a filename in the directory path
or fd that the process is allowed to create. The corresponding
macro is _POSIX_NAME_MAX.
returns the maximum length of a relative pathname when path or
fd is the current working directory. The corresponding macro is
returns the size of the pipe buffer, where fd must refer to a
pipe or FIFO and path must refer to a FIFO. The corresponding
macro is _POSIX_PIPE_BUF.
returns nonzero if the chown(2) call may not be used on this
The limit is returned, if one exists. If the system does not have a
limit for the requested resource, -1 is returned, and errno is
unchanged. If there is an error, -1 is returned, and errno is set to
reflect the nature of the error.
Files with name lengths longer than the value returned for name equal
to _PC_NAME_MAX may exist in the given directory.
Some returned values may be huge; they are not suitable for allocating
getconf(1), open(2), statfs(2), sysconf(3)
This page is part of release 3.35 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://man7.org/linux/man-pages/.
GNU 1993-04-04 FPATHCONF(3)
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