UUX(1-SysV)         RISC/os Reference Manual          UUX(1-SysV)



NAME
     uux - UNIX-to-UNIX system command execution

SYNOPSIS
     uux [ options ] command-string

DESCRIPTION
     uux will gather zero or more files from various systems,
     execute a command on a specified system and then send stan-
     dard 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, permiting only the receipt of mail (see mail(1)).
     (Remote execution permissions are defined in
     /usr/lib/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

     (1)  a full path name;

     (2)  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;

     (3)  anything else is prefixed by the current directory.

     As an example, the command

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

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

     Any special shell characters such as <>;| should be quoted
     either by quoting the entire command-string, or 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 -fR b!/usr/file \(c!/usr/file\)





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UUX(1-SysV)         RISC/os Reference Manual          UUX(1-SysV)



     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.  This notification can be turned off
     by the -n option.  The response comes by remote mail from
     the remote machine.

     The following options are interpreted by uux:

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

     -aname
          Use name as the user identification replacing the ini-
          tiator user-id.  (Notification will be returned to the
          user.)

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

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

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

     -ggrade
          grade is a single letter/number; lower ASCII sequence
          characters will cause the job to be transmitted earlier
          during a particular conversation.

     -j   Output the jobid ASCII string on the standard output
          which is the job identification.  This job identifica-
          tion can be used by uustat to obtain the status or ter-
          minate a job.

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

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

     -r   Do not start the file transfer, just queue the job.

     -sfile
          Report status of the transfer in file.

     -xdebug_level
          Produce debugging output on the standard output.  The
          debug_level is a number between 0 and 9; higher numbers
          give more detailed information.



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UUX(1-SysV)         RISC/os Reference Manual          UUX(1-SysV)



     -z   Send success notification to the user.

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

SEE ALSO
     cut(1), mail(1), uucp(1), uustat(1).

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 << and >> 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 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:

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

     but the command

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

     will work (if diff is a permitted command).

ERRORS
     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.













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