OS(1) (hosted) OS(1)
NAME
os - interface to host OS commands (hosted Inferno only)
SYNOPSIS
bind -a '#C' /
os [ -b ] [ -m mountpoint ] [ -d dir ] [ -n ] [ -N level ]
cmd [ arg... ]
DESCRIPTION
Os uses a cmd(3) device to execute a command, cmd, on a host
system. If the -m option is given, os uses the device at
mountpoint, otherwise it is asssumed to be at /cmd, and is
bound into the local namespace if necessary.
The -d option causes the command to run in directory dir; an
error results and the command will not run if dir does not
exist or is inaccessible. The standard output and standard
error of the command appear on the standard output and stan-
dard error streams of the os command itself. Os copies the
standard input to the remote command's standard input; redi-
rect os's input to /dev/null if there is no input to the
command. Os terminates when cmd does, and its exit status
reflects the status of cmd (if available).
If the os command is killed or exits (eg, for lack of input
and output), the host's own process control operations are
used to (attempt to) kill cmd, if it is still running. The
-b (background) option suppresses that behaviour.
The -n option causes cmd to run with less than normal prior-
ity (`nice'). The -N option sets low priority to a particu-
lar level from 1 to 3.
FILES
/cmd/clone
SOURCE
/appl/cmd/os.b
SEE ALSO
cpu(1), rcmd(1), cmd(3)
DIAGNOSTICS
The exit status of os reflects any error that occurs when
starting cmd and, if it starts successfully, the status of
os is the exit status of cmd.
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