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link (2)
  • link (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
  • link (1) ( FreeBSD man: Команды и прикладные программы пользовательского уровня )
  • link (1) ( Русские man: Команды и прикладные программы пользовательского уровня )
  • link (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
  • link (1) ( POSIX man: Команды и прикладные программы пользовательского уровня )
  • >> link (2) ( Solaris man: Системные вызовы )
  • link (2) ( FreeBSD man: Системные вызовы )
  • link (2) ( Русские man: Системные вызовы )
  • link (2) ( Linux man: Системные вызовы )
  • link (3) ( Solaris man: Библиотечные вызовы )
  • link (3) ( POSIX man: Библиотечные вызовы )
  • link (5) ( FreeBSD man: Форматы файлов )
  • Ключ link обнаружен в базе ключевых слов.
  •  

    NAME

    link - link to a file
     
    

    SYNOPSIS

    #include <unistd.h>
    
    int link(const char *existing, const char *new);
    

     

    DESCRIPTION

    The link() function creates a new link (directory entry) for the existing file and increments its link count by one. The existing argument points to a path name naming an existing file. The new argument points to a pathname naming the new directory entry to be created.

    To create hard links, both files must be on the same file system. Both the old and the new link share equal access and rights to the underlying object. Privileged processes can make multiple links to a directory. Unless the caller is privileged, the file named by existing must not be a directory.

    Upon successful completion, link() marks for update the st_ctime field of the file. Also, the st_ctime and st_mtime fields of the directory that contains the new entry are marked for update.  

    RETURN VALUES

    Upon successful completion, 0 is returned. Otherwise, -1 is returned, no link is created, and errno is set to indicate the error.  

    ERRORS

    The link() function will fail if:

    EACCES

    A component of either path prefix denies search permission, or the requested link requires writing in a directory with a mode that denies write permission.

    EDQUOT

    The directory where the entry for the new link is being placed cannot be extended because the user's quota of disk blocks on that file system has been exhausted.

    EEXIST

    The link named by new exists.

    EFAULT

    The existing or new argument points to an illegal address.

    EILSEQ

    The path argument includes non-UTF8 characters and the file system accepts only file names where all characters are part of the UTF-8 character codeset.

    EINTR

    A signal was caught during the execution of the link() function.

    ELOOP

    Too many symbolic links were encountered in translating path.

    EMLINK

    The maximum number of links to a file would be exceeded.

    ENAMETOOLONG

    The length of the existing or new argument exceeds PATH_MAX, or the length of a existing or new component exceeds NAME_MAX while _POSIX_NO_TRUNC is in effect.

    ENOENT

    The existing or new argument is a null pathname; a component of either path prefix does not exist; or the file named by existing does not exist.

    ENOLINK

    The existing or new argument points to a remote machine and the link to that machine is no longer active.

    ENOSPC

    The directory that would contain the link cannot be extended.

    ENOTDIR

    A component of either path prefix is not a directory.

    EPERM

    The file named by existing is a directory and the {PRIV_SYS_LINKDIR} privilege is not asserted in the effective set of the calling process.

    The effective user ID does not match the owner of the file and the {PRIV_FILE_LINK_ANY} privilege is not asserted in the effective set of the calling process.

    EROFS

    The requested link requires writing in a directory on a read-only file system.

    EXDEV

    The link named by new and the file named by existing are on different logical devices (file systems).

     

    ATTRIBUTES

    See attributes(5) for descriptions of the following attributes:

    ATTRIBUTE TYPEATTRIBUTE VALUE

    Interface StabilityStandard

    MT-Level

     

    SEE ALSO

    symlink(2), unlink(2), attributes(5), privileges(5), standards(5)


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUES
    ERRORS
    ATTRIBUTES
    SEE ALSO


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