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UUX(1C)                                                                UUX(1C)



NAME
       uux - remote system command execution

SYNOPSIS
       uux [ - ] [ -bcCjnprz ] [ -aname ] [ -ggrade ]
            [ -x debug_level ] command-string

AVAILABILITY
       This  command  is available with the uucp software installation option.
       Refer to for information on how to install optional software.

DESCRIPTION
       uux will gather 0 or more files from various systems, execute a command
       on a specified system and send the standard output to a file on a spec-
       ified system.

       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  pre-
       fixed  by  `system-name!'.   A  null  system-name is interpreted as the
       local system.

       Path names may be one of:

              o   a full pathname;

              o   a pathname preceded by ~username/; username  is  interpreted
                  as  a  username  on  the specified system and is replaced by
                  that user's login directory on that system;

              o   a pathname preceded by ~/destination/; the ~/ is replaced by
                  the "public UUCP" directory on the remote machine Note: this
                  destination will be treated as a file name unless more  than
                  one  file is being transferred by this request or the desti-
                  nation is already a directory.   To  ensure  that  it  is  a
                  directory,  follow  the destination with a '/'.  For example
                  ~/dan/  as  the  destination   will   make   the   directory
                  /usr/spool/uucppublic/dan  if  it does not exist and put the
                  requested file(s) in that directory;

              o   a partial pathname, which is prefixed  by  the  pathname  of
                  current directory.

       The `-' option sends the standard input to the uux command as the stan-
       dard input to the command-string.

       Any special shell characters such as <&lt;>&gt;, ;,  and  |  should  be  quoted
       either  by quoting the entire command-string, or by quoting the special
       characters as individual arguments.

       uux will attempt to get all files to the execution system.   For  files
       that are output files, the file name must be escaped using parentheses.
       For example, the command

              uux a!cut -f1 b!/usr/file \(c!/usr/file\)

       gets /usr/file 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,  or  if the command fails (that is, returns a non-zero exit
       status).  This notification can be turned off by the  -n  option.   The
       response comes by remote mail from the remote machine.

OPTIONS
       -b     Return  whatever  standard input was provided to the uux command
              if the job fails (that is, returns a non-zero exit status).

       -c     Do not copy local file to the spool directory  for  transfer  to
              the remote machine.  This is the default.

       -C     Force  the copy of local files to the spool directory for trans-
              fer.

       -j     Output the jobid ASCII 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     Do not return any indication by mail(1) of success or failure of
              the job.

       -p     Same  as  `-':  the  standard  input to uux is made the standard
              input to the command-string.

       -r     Do not start uucico(8C), just queue the job.

       -z     Return an indication by mail even if the job succeeds (that  is,
              returns a zero exit status).

       -aname Use name as the user identification replacing the initiator user
              ID.  Notification will be returned to the user.

       -ggrade
              grade is a single letter or number, from 0 to 9, A to Z, or a to
              z;  0  is  the  highest grade, and z is the lowest grade.  Lower
              grades will transmit the job earlier during a particular conver-
              sation.  The default grade is A.

       -x debug_level
              Produce debugging output on the standard output.  debug_level is
              a number between 0 and 9;  higher  numbers  give  more  detailed
              information.   5,  7,  and  9 are good numbers to try; they give
              increasing amounts of detail.

EXAMPLE
       The command

              uux    "!diff    usg!/usr/dan/file1     pwba!/a4/dan/file2     >&gt;
              !~/dan/file.diff"

       will get the file1 and file2 files from the usg and pwba machines, exe-
       cute a diff(1) command and put the results in file.diff  in  the  local
       PUBDIR/dan directory.

FILES
       /var/spool/uucp          spool directories
       /etc/uucp/Permissions    remote execution permissions
       /etc/uucp/*              other data
       /usr/lib/uucp/*          other programs

SEE ALSO
       mail(1), uucp(1C), uustat(1C), uucico(8C)

WARNINGS
       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.

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

       The shell tokens <&lt;<&lt; and >&gt;>&gt; are not implemented.

       The execution of commands on remote systems takes place in an execution
       directory known to the UUCP system.  All files required for the  execu-
       tion will be put into this directory unless they already reside on that
       machine.  Therefore, the simple file name (without path or machine ref-
       erence)  must  be unique within the uux request.  The following command
       will NOT work:

              uux "a!diff b!/usr/dan/xyz c!/usr/dan/xyz >&gt; !xyz.diff"

       but the command

              uux "a!diff a!/usr/dan/xyz c!/usr/dan/xyz >&gt; !xyz.diff"

       will work (if diff is a permitted command).

       When invoking uux from csh(1), the !  character must be prefixed by the
       \ escape to inhibit csh's history mechanism. Quotes are not sufficient.

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



                                  8 June 1988                          UUX(1C)