ruserok man page on DigitalUNIX

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ruserok(3)							    ruserok(3)

       ruserok - Allow servers to authenticate clients

       #include <unistd.h>

       int ruserok(
	       char *host,
	       int root_user,
	       char *remote_user,
	       char *local_user );

       Standard C Library (libc)

       Specifies  the  name  of	 a remote host.	 Specifies a value to indicate
       whether the effective user ID of the calling process is that of a  root
       user.   A  value of 0 (zero) indicates the process does not have a root
       user ID.	 A value of 1 indicates that the process has local  root  user
       privileges,  and	 the /etc/host.equiv file is not checked.  Points to a
       username that is valid at the remote host.  Any valid username  can  be
       specified.   Points to a username that is valid at the local host.  Any
       valid username can be specified.

       The ruserok() (remote command  user  OK)	 function  allows  servers  to
       authenticate clients requesting services.

       The  hostname must be specified.	 If the local domain and remote domain
       are the same, specifying the domain parts is  optional.	 To  determine
       the  domain  of the host, use the gethostname() function. The ruserok()
       function checks for this host in the /etc/host.equiv  file.   Then,  if
       necessary, the subroutine checks a file in the user's home directory at
       the server called $HOME/.rhosts for a host and remote user ID.

       The ruserok() function returns 0 (zero) if the subroutine  successfully
       locates	 the   name   specified	  by   the   host   parameter  in  the
       /etc/hosts.equiv	 file  or  if  the  IDs	 specified  by	the  host  and
       remote_user parameters are found in the $HOME/.rhosts file.

       If  the	name  specified	 by  the  host	parameter  was	not found, the
       ruserok() function returns a value of -1.

       Contains service names.	Specifies foreign  hostnames.	Specifies  the
       remote users of a local user account.

       Functions: gethostname(2), rcmd(3), rresvport(3), sethostname(2)

       Commands: rlogind(8), rshd(8)


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