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FCHOWN(P)			    POSIX Programmer's Manual				FCHOWN(P)

NAME
       fchown - change owner and group of a file

SYNOPSIS
       #include <unistd.h>

       int fchown(int fildes, uid_t owner, gid_t group);

DESCRIPTION
       The  fchown() function shall be equivalent to chown() except that the file whose owner and
       group are changed is specified by the file descriptor fildes.

RETURN VALUE
       Upon successful completion, fchown() shall return 0. Otherwise, it shall return -1 and set
       errno to indicate the error.

ERRORS
       The fchown() function shall fail if:

       EBADF  The fildes argument is not an open file descriptor.

       EPERM  The  effective user ID does not match the owner of the file or the process does not
	      have appropriate privilege and _POSIX_CHOWN_RESTRICTED indicates that  such  privi-
	      lege is required.

       EROFS  The file referred to by fildes resides on a read-only file system.

       The fchown() function may fail if:

       EINVAL The  owner  or group ID is not a value supported by the implementation.  The fildes
	      argument refers to a pipe or socket  or an fattach()-ed STREAM   and the	implemen-
	      tation disallows execution of fchown() on a pipe.

       EIO    A physical I/O error has occurred.

       EINTR  The fchown() function was interrupted by a signal which was caught.

       The following sections are informative.

EXAMPLES
   Changing the Current Owner of a File
       The  following  example	shows  how  to change the owner of a file named /home/cnd/mod1 to
       "jones" and the group to "cnd".

       The numeric value for the user ID is obtained by extracting the	user  ID  from	the  user
       database  entry associated with "jones".  Similarly, the numeric value for the group ID is
       obtained by extracting the group ID from the group database entry associated  with  "cnd".
       This example assumes the calling program has appropriate privileges.

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

	      struct passwd *pwd;
	      struct group  *grp;
	      int	     fildes;
	      ...
	      fildes = open("/home/cnd/mod1", O_RDWR);
	      pwd = getpwnam("jones");
	      grp = getgrnam("cnd");
	      fchown(fildes, pwd->pw_uid, grp->gr_gid);

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       chown() , the Base Definitions volume of IEEE Std 1003.1-2001, <unistd.h>

COPYRIGHT
       Portions  of  this  text  are  reprinted  and  reproduced in electronic form from IEEE Std
       1003.1, 2003 Edition, Standard for Information Technology  --  Portable	Operating  System
       Interface  (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
       the Institute of Electrical and Electronics Engineers, Inc and  The  Open  Group.  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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003					FCHOWN(P)
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