uux(1C) 						      Communication Commands							   uux(1C)

NAME

       uux - UNIX-to-UNIX system command execution

SYNOPSIS

       uux [-] [-bcCjnprz] [-a name] [-g grade]
	    [-s filename] [-x debug_level] command-string

DESCRIPTION

       The  uux utility will gather zero or more files from various systems, execute a command on a specified system and then send standard output
       to a file on a specified system.

       Note:  For security reasons, most installations limit the list of commands executable on behalf of an incoming request from uux, permitting
       only the receipt of mail (see mail(1)). (Remote execution permissions are defined in /etc/uucp/Permissions.)

       The  command-string  is made up of one or more arguments that look like a shell command line, except that the command and file names may be
       prefixed by system-name!. A null system-name is interpreted as the local system.

       File names may be one of the following:

	   o	  An absolute path name.

	   o	  A path name preceded by ~xxx, where xxx is a login name on the specified system and is replaced by that user's login directory.

       Anything else is prefixed by the current directory.

       As an example, the command:

	 example% uux "!diff sys1!/home/dan/filename1 
		sys2!/a4/dan/filename2 > !~/dan/filename.diff"

       will get the filename1 and filename2 files from the sys1 and sys2 machines, execute a diff(1) command and put the results in  filename.diff
       in the local PUBDIR/dan/ directory. PUBDIR is a public directory defined in the uucp source. By default, this directory is /var/spool/uucp-
       public.

       Any special shell characters (such as < > ; |) should be quoted either by quoting the entire command-string, or quoting the special charac-
       ters as individual arguments. The redirection operators >>,  <<, >|, and >& cannot be used.

       uux  will  attempt  to get all appropriate files to the specified system where they will be processed. For files that are output files, the
       file name must be escaped using parentheses. For example, the command:

	 example% uux "a!cut -f1 b!/usr/filename > c!/usr/filename"

       gets /usr/filename from system b and sends it to system a, performs a cut command on that file and sends the result of the cut  command	to
       system c.

       uux will notify you if the requested command on the remote system was disallowed. This notification can be turned off by the -n option. The
       response comes by remote mail from the remote machine.

OPTIONS

       The following options are supported:

       -		 The standard input to uux is made the standard input to the command-string.

       -a name		 Uses name as the user job identification replacing the initiator user-id.  (Notification  will  be  returned  to  user-id
			 name.)

       -b		 Returns whatever standard input was provided to the uux command if the exit status is non-zero.

       -c		 Does not copy local file to the spool directory for transfer to the remote machine (default).

       -C		 Forces the copy of local files to the spool directory for transfer.

       -g grade 	 grade	can  be  either  a  single  letter,  number,  or a string of alphanumeric characters defining a service grade. The
			 uuglist(1C) command determines whether it is appropriate to use the single letter, number, or a  string  of  alphanumeric
			 characters as a service grade. The output from the uuglist command will be a list of service grades that are available or
			 a message that says to use a single letter or number as a  grade of service.

       -j		 Outputs the jobid string on the standard output which is the job identification. This job identification can be  used	by
			 uustat(1C) to obtain the status  or terminate a job.

       -n		 Does not notify the user if the command fails.

       -p		 Same as -. The standard input to uux is made the standard input to the command-string.

       -r		 Does not start the file transfer, but just queues the job.

       -s filename	 Reports  status  of  the transfer in filename. This option is accepted for compatibility, but it is ignored because it is
			 insecure.

       -x debug_level	 Produces debugging output on the standard output. debug_level is a number between 0 and 9. As debug_level increases to 9,
			 more detailed debugging information is given.

       -z		 Sends success notification to the user.

ENVIRONMENT VARIABLES

       See  environ(5)	for  descriptions of the following environment variables that affect the execution of uux: LANG, LC_ALL, LC_CTYPE, LC_MES-
       SAGES, and NLSPATH.

EXIT STATUS

       The following exit values are returned:

       0     Successful completion.

       >0    An error occurred.

FILES

       /etc/uucp/*		other data and programs

       /etc/uucp/Permissions	remote execution permissions

       /usr/lib/uucp/*		other programs

       /var/spool/uucp		spool directories

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWbnuu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       cut(1), mail(1), uucp(1C), uuglist(1C), uustat(1C), attributes(5), environ(5), standards(5)

NOTES

       The execution of commands on remote systems takes place in an execution directory known to the uucp system.

       All files required for the execution will be put into this directory unless they already reside on that machine. Therefore, the simple file
       name (without path or machine reference) must be unique within the uux request. The following command will NOT work:

	 example% uux "a!diff b!/home/dan/xyz c!/home/dan/xyz > !xyz.diff"

       But the command:

	 example% uux "a!diff a!/home/dan/xyz c!/home/dan/xyz > !xyz.diff"

       will work (if diff is a permitted command.)

       Protected  files and files that are in protected directories that are owned by the requester can be sent in commands using uux. However, if
       the requester is root, and the directory is not searchable by "other", the request will fail.

       The following restrictions apply to the shell pipeline processed by uux:

	   o	  In gathering files from different systems, pathname expansion in not performed by uux. Thus, a request such as

			uux "c89 remsys!~/*.c"

		  would attempt to copy the file named literally *.c to the local system.

	   o	  Only the first command of a shell pipeline may have a system-name!. All other commands are executed on the system of	the  first
		  command.

	   o	  The use of the shell metacharacter * will probably not do what you want it to do.

	   o	  The shell tokens << and >> are not implemented.

	   o	  The redirection operators >>, <<, >|, and >& cannot be used.

	   o	  The reserved word ! cannot be used at the head of the pipeline to modify the exit status.

	   o	  Alias substitution is not performed.

SunOS 5.11							    28 Mar 1995 							   uux(1C)