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pathconf (3)
  • pathconf (2) ( Solaris man: Системные вызовы )
  • pathconf (2) ( FreeBSD man: Системные вызовы )
  • pathconf (3) ( Русские man: Библиотечные вызовы )
  • >> pathconf (3) ( Linux man: Библиотечные вызовы )
  • pathconf (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

    fpathconf, pathconf - get configuration values for files
     
    

    SYNOPSIS

    #include <unistd.h>
    
    long fpathconf(int fd, int name);
    
    long pathconf(char *path, int name);
     

    DESCRIPTION

    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 path.

    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 liberal results.

    Setting name equal to one of the following constants returns the following configuration options:

    _PC_LINK_MAX
    returns the maximum number of links to the file. If fd or path refer to a directory, then the value applies to the whole directory. The corresponding macro is _POSIX_LINK_MAX.
    _PC_MAX_CANON
    returns the maximum length of a formatted input line, where fd or path must refer to a terminal. The corresponding macro is _POSIX_MAX_CANON.
    _PC_MAX_INPUT
    returns the maximum length of an input line, where fd or path must refer to a terminal. The corresponding macro is _POSIX_MAX_INPUT.
    _PC_NAME_MAX
    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.
    _PC_PATH_MAX
    returns the maximum length of a relative pathname when path or fd is the current working directory. The corresponding macro is _POSIX_PATH_MAX.
    _PC_PIPE_BUF
    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.
    _PC_CHOWN_RESTRICTED
    returns non-zero if the chown(2) call may not be used on this file. If fd or path refer to a directory, then this applies to all files in that directory. The corresponding macro is _POSIX_CHOWN_RESTRICTED.
    _PC_NO_TRUNC
    returns non-zero if accessing filenames longer than _POSIX_NAME_MAX generates an error. The corresponding macro is _POSIX_NO_TRUNC.
    _PC_VDISABLE
    returns non-zero if special character processing can be disabled, where fd or path must refer to a terminal.
     

    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 errno is unchanged. If there is an error, -1 is returned, and errno is set to reflect the nature of the error.  

    CONFORMING TO

    POSIX.1-2001.  

    NOTES

    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 memory.  

    SEE ALSO

    getconf(1), open(2), statfs(2), sysconf(3)  

    COLOPHON

    This page is part of release 3.14 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    CONFORMING TO
    NOTES
    SEE ALSO
    COLOPHON


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