lchown man page on Archlinux

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LCHOWN(3P)		   POSIX Programmer's Manual		    LCHOWN(3P)

       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the	 corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.

       lchown — change the owner and group of a symbolic link

       #include <unistd.h>

       int lchown(const char *path, uid_t owner, gid_t group);

       The lchown() function shall be equivalent to  chown(),  except  in  the
       case  where  the	 named file is a symbolic link. In this case, lchown()
       shall change the ownership of the  symbolic  link  file	itself,	 while
       chown()	changes	 the  ownership	 of the file or directory to which the
       symbolic link refers.

       Upon successful completion, lchown()  shall  return  0.	Otherwise,  it
       shall return −1 and set errno to indicate an error.

       The lchown() function shall fail if:

       EACCES Search permission is denied on a component of the path prefix of

       EINVAL The owner or group ID is not a value supported by the  implemen‐

       ELOOP  A loop exists in symbolic links encountered during resolution of
	      the path argument.

	      The  length  of  a  component  of	 a  pathname  is  longer  than

       ENOENT A component of path does not name an existing file or path is an
	      empty string.

	      A component of the path prefix names an existing	file  that  is
	      neither  a  directory nor a symbolic link to a directory, or the
	      path argument contains at least one  non-<slash>	character  and
	      ends  with  one or more trailing <slash> characters and the last
	      pathname component names an existing  file  that	is  neither  a
	      directory nor a symbolic link to a directory.

       EPERM  The  effective  user ID does not match the owner of the file and
	      the process does not have appropriate privileges.

       EROFS  The file resides on a read-only file system.

       The lchown() function may fail if:

       EIO    An I/O error occurred while reading or writing to the file  sys‐

       EINTR  A signal was caught during execution of the function.

       ELOOP  More  than  {SYMLOOP_MAX} symbolic links were encountered during
	      resolution of the path argument.

	      The length of a pathname exceeds {PATH_MAX}, or pathname resolu‐
	      tion  of	a symbolic link produced an intermediate result with a
	      length that exceeds {PATH_MAX}.

       The following sections are informative.

   Changing the Current Owner of a File
       The following example shows how to change the ownership of the symbolic
       link  named /modules/pass1 to the user ID associated with ``jones'' and
       the group ID associated with ``cnd''.

       The numeric value for the user ID is obtained by using  the  getpwnam()
       function.  The  numeric value for the group ID is obtained by using the
       getgrnam() function.

	   #include <sys/types.h>
	   #include <unistd.h>
	   #include <pwd.h>
	   #include <grp.h>

	   struct passwd *pwd;
	   struct group	 *grp;
	   char		 *path = "/modules/pass1";
	   pwd = getpwnam("jones");
	   grp = getgrnam("cnd");
	   lchown(path, pwd->pw_uid, grp->gr_gid);

       On implementations which support symbolic links	as  directory  entries
       rather than files, lchown() may fail.



       chown(), symlink()

       The Base Definitions volume of POSIX.1‐2008, <unistd.h>

       Portions	 of  this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       --  Portable  Operating	System	Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
       cal  and	 Electronics  Engineers,  Inc  and  The	 Open Group.  (This is
       POSIX.1-2008 with the 2013 Technical Corrigendum	 1  applied.)  In  the
       event of any discrepancy between this version and the original IEEE and
       The Open Group Standard, the original IEEE and The Open Group  Standard
       is  the	referee document. The original Standard can be obtained online
       at .

       Any typographical or formatting errors that appear  in  this  page  are
       most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors,	 see  https://www.ker‐ .

IEEE/The Open Group		     2013			    LCHOWN(3P)

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