uux(1C) USER COMMANDS uux(1C)
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 com-
mands 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:
(1) a full pathname;
(2) a pathname 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 direc-
tory.
As an example, the command
uux "!diff sys1!/home/dan/file1 sys2!/a4/dan/file2 >
!~/dan/file.diff"
will get the file1 and file2 files from the ``sys1'' and
``sys2'' machines, execute a diff(1) command and put the
results in file.diff in the local PUBDIR/dan/ directory.
PUBDIR is a public directory defined in the uucp source. By
default, this directory is /var/spool/uucppublic
Any special shell characters such as <, >, ;, | should be
quoted either by quoting the entire command-string, or quot-
ing the special characters as individual arguments.
uux will attempt to get all appropriate files to the speci-
fied system where they will be processed. 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"
Last change: Basic Networking Utilities 1
uux(1C) USER COMMANDS uux(1C)
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 job identification replacing
the initiator user-id. (Notification will be
returned to user-id name.)
-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 direc-
tory for transfer.
-ggrade grade can be either a single letter, number, or a
string of alphanumeric characters defining a ser-
vice grade. The uuglist(1C) command determines
whether it is appropriate to use the single
letter, number, or a string of alphanumeric char-
acters 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 Output the jobid string on the standard output
which is the job identification. This job iden-
tification can be used by uustat(1C) to obtain the
status or terminate a job.
-n Do 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 Do not start the file transfer, just queue the
job.
-sfile Report status of the transfer in file.
Last change: Basic Networking Utilities 2
uux(1C) USER COMMANDS uux(1C)
-xdebug_level
Produce debugging output on the standard output.
debug_level is a number between 0 and 9; as it
increases to 9, more detailed debugging informa-
tion is given.
-z Send success notification to the user.
FILES
/var/spool/uucp spool directories
/etc/uucp/Permissions remote execution permissions
/usr/lib/uucp/* other programs
/etc/uucp/* other data and programs
NOTES
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!/home/dan/xyz c!/home/dan/xyz > !xyz.diff"
but the command
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.
SEE ALSO
cut(1), mail(1), uuglist(1C), uucp(1C), uustat(1C).
Last change: Basic Networking Utilities 3