uux(1) uux(1)
NAME
uux - Remote command execution over UUCP
SYNOPSIS
uux [ options ] command
DESCRIPTION
The uux command is used to execute a command on a remote system, or to execute a command on the local system using files from remote systems. The command is not executed immediately; the request is queued until the uucico (8) daemon calls the system and executes it. The daemon is started automatically unless one of the -r or --nouucico options is given. The actual command execution is done by the uuxqt (8) dae- mon. File arguments can be gathered from remote systems to the execution system, as can standard input. Standard output may be directed to a file on a remote system. The command name may be preceded by a system name followed by an exclamation point if it is to be executed on a remote system. An empty system name is taken as the local system. Each argument that contains an exclamation point is treated as naming a file. The system which the file is on is before the exclamation point, and the pathname on that system follows it. An empty system name is taken as the local system; this must be used to transfer a file to a command being executed on a remote system. If the path is not absolute, it will be appended to the current working directory on the local system; the result may not be mean- ingful on the remote system. A pathname may begin with ~/, in which case it is relative to the UUCP public direc- tory (usually /var/spool/uucppublic) on the appropriate system. A pathname may begin with ~name/, in which case it is relative to the home directory of the named user on the appropriate system. Standard input and output may be redirected as usual; the pathnames used may contain exclamation points to indicate that they are on remote systems. Note that the redirec- tion characters must be quoted so that they are passed to uux rather than interpreted by the shell. Append redirec- tion (>>) does not work. All specified files are gathered together into a single directory before execution of the command begins. This means that each file must have a distinct base name. For example, uux 'sys1!diff sys2!~user1/foo sys3!~user2/foo >!foo.diff' Taylor UUCP 1.06 1 uux(1) uux(1) will fail because both files will be copied to sys1 and stored under the name foo. Arguments may be quoted by parentheses to avoid interpre- tation of exclamation points. This is useful when execut- ing the uucp command on a remote system. A request to execute an empty command (e.g., uux sys!) will create a poll file for the specified system.
OPTIONS
The following options may be given to uux. -, -p, --stdin Read standard input and use it as the standard input for the command to be executed. -c, --nocopy Do not copy local files to the spool directory. This is the default. If they are removed before being processed by the uucico (8) daemon, the copy will fail. The files must be readable by the uucico (8) daemon, as well as the by the invoker of uux. -C, --copy Copy local files to the spool directory. -l, --link Link local files into the spool directory. If a file can not be linked because it is on a different device, it will be copied unless one of the -c or --nocopy options also appears (in other words, use of --link switches the default from --nocopy to --copy). If the files are changed before being processed by the uucico (8) daemon, the changed versions will be used. The files must be readable by the uucico (8) daemon, as well as by the invoker of uux. -g grade, --grade grade Set the grade of the file transfer command. Jobs of a higher grade are executed first. Grades run 0 ... 9 A ... Z a ... z from high to low. -n, --notification=no Do not send mail about the status of the job, even if it fails. -z, --notification=error Send mail about the status of the job if an error occurs. For many uuxqt daemons, including the Taylor UUCP uuxqt, this is the default action; for those, --notification=error will have no effect. However, some uuxqt daemons will send mail if the job succeeds unless the --notification=error option is used, and Taylor UUCP 1.06 2 uux(1) uux(1) some other uuxqt daemons will not send mail if the job fails unless the --notification=error option is used. -r, --nouucico Do not start the uucico (8) daemon immediately; merely queue up the execution request for later pro- cessing. -j, --jobid Print jobids on standard output. A jobid will be generated for each file copy operation required to perform the operation. These file copies may be can- celled by passing the jobid to the --kill switch of uustat (1), which will make the execution impossible to complete. -a address, --requestor address Report job status to the specified e-mail address. -x type, --debug type Turn on particular debugging types. The following types are recognized: abnormal, chat, handshake, uucp-proto, proto, port, config, spooldir, execute, incoming, outgoing. Only abnormal, config, spooldir and execute are meaningful for uux. Multiple types may be given, separated by commas, and the --debug option may appear multiple times. A num- ber may also be given, which will turn on that many types from the foregoing list; for example, --debug 2 is equivalent to --debug abnormal,chat. -I file, --config file Set configuration file to use. This option may not be available, depending upon how uux was compiled. -v, --version Report version information and exit. --help Print a help message and exit.
EXAMPLES
uux -z - sys1!rmail user1 Execute the command ``rmail user1'' on the system sys1, giving it as standard input whatever is given to uux as standard input. If a failure occurs, send a message using mail (1). uux 'diff -c sys1!~user1/file1 sys2!~user2/file2 >!file.diff' Fetch the two named files from system sys1 and system sys2 and execute diff putting the result in file.diff in the current directory. The current directory must be writable Taylor UUCP 1.06 3 uux(1) uux(1) by the uuxqt (8) daemon for this to work. uux 'sys1!uucp ~user1/file1 (sys2!~user2/file2)' Execute uucp on the system sys1 copying file1 (on system sys1) to sys2. This illustrates the use of parentheses for quoting.
RESTRICTIONS
The remote system may not permit you to execute certain commands. Many remote systems only permit the execution of rmail and rnews. Some of the options are dependent on the capabilities of the uuxqt (8) daemon on the remote system.
FILES
The file names may be changed at compilation time or by the configuration file, so these are only approximations. /etc/uucp/config - Configuration file. /var/spool/uucp - UUCP spool directory. /var/spool/uucp/Log - UUCP log file. /var/spool/uucppublic - Default UUCP public directory.
SEE ALSO
mail(1), uustat(1), uucp(1), uucico(8), uuxqt(8)
BUGS
Files can not be referenced across multiple systems. Too many jobids are output by --jobid, and there is no good way to cancel a local execution requiring remote files.
AUTHOR
Ian Lance Taylor (ian@airs.com) Taylor UUCP 1.06 4
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