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-.TH NOSH 8
-.CT 1 shell proc_man dirs files
-.SH NAME
-nosh \- `no-surprise' shell, a sub-standard command interpreter
-.SH SYNOPSIS
-.B /etc/nosh
-[
-.I file
-]
-.PP
-.B priv nosh -gunxlp
-.I file
-.SH DESCRIPTION
-.I Nosh
-executes commands read from its standard input
-or from the named
-.IR file .
-It has few of the advanced features of
-.IR sh (1),
-making it more trustable for use in
-security administration tasks.
-In the second usage,
-.I nosh
-is endowed with one or more of the licenses
-.BR gunxlp ;
-see
-.IR labtoa (3).
-.SS Commands
-A
-command is either
-.I simple
-or
-.I builtin.
-Each command consists of
-a sequence of
-.I words
-separated by white space,
-terminated by a new-line character or end of input.
-Backslash quoting and sharp commenting are honored.
-The first word specifies the name of the command to
-be executed.
-If the command name matches one of the builtins
-listed below it is executed in the shell process.
-If the command name matches no
-builtin command, it is taken to be the 
-pathname of an executable file; the name must begin with
-.L /
-or
-.LR . .
-A new process is created and an attempt is made to
-execute the file via
-.IR exec (2) 
-with an empty environment.
-.SS Input-Output Redirection
-The standard input is inherited by simple commands.
-Simple
-.B >
-output redirection to named files as in 
-.IR sh (1)
-works only for simple commands, and only for file
-descriptors 1 (default) and 2.
-.SS Builtin Commands
-.PP
-.PD 0
-.TP
-.BI cd " dir
-Change the current directory to
-.I dir.
-.TP
-.BI exit " status
-Exit with given status, 0 by default.
-.TP
-.B set +e
-.TP
-.B set -e
-Turn an ignore-error switch on
-.RB ( +e ,
-default) or off
-.RB ( -e ).
-.I Nosh
-normally ignores nonzero exit status from an executed
-command, but exits with that status if
-.B -e
-is set.
-.TP
-.B set +x
-.TP
-.B set -x
-Refrain from echoing
-.RB ( +x ,
-default) or echo
-.RB ( -x )
-each command as it is executed.
-.TP
-.BI lmask " licenses command \fR[\fP arg \fR... ]\fP 
-Run a simple command, allowing licenses
-indicated by a nonempty string from the set
-.BR gunxlp- 
-to be inherited from
-.I nosh.
-Normally no licenses are inherited.
-.SS Missing features
-Features of
-.IR sh (1)
-that
-.IR nosh 
-lacks include:
-background commands, pipelines, compound commands, most builtins, 
-multicharacter quotation,
-command substitution, parameter substitution, variables, environments,
-file name generation, redirection of input, signal traps,
-search paths, mail notification,
-.BR .profile ,
-user specification of prompts.
-.SH DIAGNOSTICS
-.I Nosh
-prints nonzero exit or termination status
-of executed commands as octal numbers labeled
-.L e=
-and
-.LR t= ;
-see
-.IR wait (2).
-If invoked with a
-.I file
-argument, it exits unconditionally for nonzero termination
-status or syntax error, and conditionally (under control of
-.LR set )
-for nonzero exit status.
-.PP
-.I Nosh
-exits immediately if
-invoked with more than one argument,
-if invoked with an argument with a relative path name,
-if invoked by a relative path name, or if invoked
-with interrupt or quit signals ignored.
-.SH SEE ALSO
-.IR sh (1)