term% cat index.txt UUX(1) General Commands Manual UUX(1)
NAME
uux - unix to unix command execution
SYNOPSIS
uux [ options ] command-string
DESCRIPTION
Uux will gather zero or more files from various systems, execute a com‐
mand on a specified system and then send standard output to a file on a
specified system. Note that, for security reasons, many installations
will limit the list of commands executable on behalf of an incoming re‐
quest from uux. Many sites will permit little more than the receipt of
mail (see mail(1)) via uux.
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.
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 direc‐
tory;
(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 file1 and file2 from the `usg' and `pwba' machines, execute a
diff command and put the results in file.diff in the local ~/dan/ di‐
rectory.
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 -f1 b!/usr/file \(c!/usr/file\)
gets /usr/file from system `b' and send it to system `a', performs a
cut command on that file and send the result of the cut command to sys‐
tem `c'.
Uux will notify you by mail if the requested command on the remote sys‐
tem was disallowed. This notification can be turned off by the -n op‐
tion.
The following options are interpreted by uux:
- The standard input to uux is made the standard input to the com‐
mand-string.
-aname
Use name as the user identification replacing the initiator user-
id. (Notification will be returned to the user.)
-b Return standard input to the command if the exit status is non-
zero.
-c Don't 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 identification can be used by uustat
to obtain the status or terminate a job.
-n Do not notify the user if the comand fails.
-p Same as -: The standard input to uux is made the standard input to
the command-string.
-r Don't start the file transfer, just queue the job.
-sfile
Report status of the transfer in file.
-xdebug-level
Produce debugging output on stdout. The debug_level is a number
between 0 and 9; higher numbers give more detailed information.
-z Notify the user if the command succeeds.
FILES
/usr/lib/uucp/spool spool directories
/usr/lib/uucp/∗ other data and programs
SEE ALSO
uucp(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 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 > !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.)
BUGS
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"
or the file is not readable by "other", the request will fail due to a
bug in setuid().
UUX(1)