[shells] / ushell.1

.TH ushell 1 "20 April 1999" "Local tools"
.SH NAME
ushell \- display a user's shell
.SH SYNOPSIS
.B ushell
.I user
.SH USAGE
Writes the named user's default shell to standard output.  This is
useful in scripts sometimes.  In particular, it's handy in global
.B xdm/Xstartup
scripts for checking whether users have sensible shells:
.sp 1
.RS 5
.nf
.ft B
SHELL=`ushell $USER`
case $SHELL in
  */banned)
    xmessage -file $HOME/.banned
    exit 1
    ;;
  *)
    if ! grep -q "^$SHELL" /etc/shells; then
      xmessage "You're not allowed to log in this way."
      exit 1
    fi
    ;;
esac
.fi
.ft R
.SH BUGS
None planned.
.SH SEE ALSO
.BR banned (8),
.BR chrootsh (8).
.SH AUTHOR
Mark Wooding (mdw@nsict.org)
Commit	Line	Data
ed36b0a2	1	.TH ushell 1 "20 April 1999" "Local tools"
	2	.SH NAME
	3	ushell \- display a user's shell
	4	.SH SYNOPSIS
	5	.B ushell
	6	.I user
	7	.SH USAGE
	8	Writes the named user's default shell to standard output. This is
	9	useful in scripts sometimes. In particular, it's handy in global
	10	.B xdm/Xstartup
	11	scripts for checking whether users have sensible shells:
	12	.sp 1
	13	.RS 5
	14	.nf
	15	.ft B
	16	SHELL=`ushell $USER`
	17	case $SHELL in
	18	*/banned)
	19	xmessage -file $HOME/.banned
	20	exit 1
	21	;;
	22	*)
	23	if ! grep -q "^$SHELL" /etc/shells; then
	24	xmessage "You're not allowed to log in this way."
	25	exit 1
	26	fi
	27	;;
	28	esac
	29	.fi
	30	.ft R
	31	.SH BUGS
	32	None planned.
	33	.SH SEE ALSO
	34	.BR banned (8),
	35	.BR chrootsh (8).
	36	.SH AUTHOR
	37	Mark Wooding (mdw@nsict.org)