projects / apple / system_cmds.git / blame
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| 34d340d7 A |
1 | .\" Copyright (c) 2002 Tim J. Robbins. |
| 2 | .\" All rights reserved. | |
| 3 | .\" | |
| 4 | .\" Redistribution and use in source and binary forms, with or without | |
| 5 | .\" modification, are permitted provided that the following conditions | |
| 6 | .\" are met: | |
| 7 | .\" 1. Redistributions of source code must retain the above copyright | |
| 8 | .\" notice, this list of conditions and the following disclaimer. | |
| 9 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
| 10 | .\" notice, this list of conditions and the following disclaimer in the | |
| 11 | .\" documentation and/or other materials provided with the distribution. | |
| 12 | .\" | |
| 13 | .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |
| 14 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 15 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 16 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
| 17 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 18 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 19 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 20 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 21 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 22 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 23 | .\" SUCH DAMAGE. | |
| 24 | .\" | |
| 25 | .\" $FreeBSD: src/usr.bin/newgrp/newgrp.1,v 1.2 2002/05/30 13:57:35 ru Exp $ | |
| 26 | .\" | |
| 27 | .Dd May 23, 2002 | |
| 28 | .Dt NEWGRP 1 | |
| 29 | .Os | |
| 30 | .Sh NAME | |
| 31 | .Nm newgrp | |
| 32 | .Nd change to a new group | |
| 33 | .Sh SYNOPSIS | |
| 34 | .Nm newgrp | |
| 35 | .Op Fl l | |
| 36 | .Op Ar group | |
| 37 | .Sh DESCRIPTION | |
| 38 | The | |
| 39 | .Nm newgrp | |
| 40 | utility creates a new shell execution environment | |
| 41 | with modified real and effective group IDs. | |
| 42 | .Pp | |
| 43 | The options are as follows: | |
| 44 | .Bl -tag -width indent | |
| 45 | .It Fl l | |
| 46 | Simulate a full login. | |
| 47 | The environment and umask are set to what would be expected | |
| 48 | if the user actually logged in again. | |
| 49 | .El | |
| 50 | .Pp | |
| 51 | If the | |
| 52 | .Ar group | |
| 53 | operand is present, a new shell is started | |
| 54 | with the specified effective and real group IDs. | |
| 55 | The user will be prompted for a password | |
| 56 | if they are not a member of the specified group. | |
| 57 | .Pp | |
| 58 | Otherwise, the real, effective, and supplementary group IDs | |
| 59 | are restored to those from the current user's password database entry. | |
| 60 | .Sh DIAGNOSTICS | |
| 61 | The | |
| 62 | .Nm newgrp | |
| 63 | utility attempts to start the shell regardless of whether group IDs | |
| 64 | were successfully changed. | |
| 65 | .Pp | |
| 66 | If an error occurs and the shell cannot be started, | |
| 67 | .Nm newgrp | |
| 68 | exits >0. | |
| 69 | Otherwise, the exit status of | |
| 70 | .Nm newgrp | |
| 71 | is the exit status of the shell. | |
| 72 | .Sh SEE ALSO | |
| 73 | .Xr csh 1 , | |
| 74 | .Xr groups 1 , | |
| 75 | .Xr login 1 , | |
| 76 | .Xr sh 1 , | |
| 77 | .Xr su 1 , | |
| 78 | .Xr umask 1 , | |
| 79 | .Xr group 5 , | |
| 80 | .Xr passwd 5 , | |
| 81 | .Xr environ 7 | |
| 82 | .Sh STANDARDS | |
| 83 | The | |
| 84 | .Nm newgrp | |
| 85 | utility conforms to | |
| 86 | .St -p1003.1-2001 . | |
| 87 | .Sh HISTORY | |
| 88 | A | |
| 89 | .Nm newgrp | |
| 90 | utility appeared in | |
| 91 | .At v6 . | |
| 92 | .Sh BUGS | |
| 93 | Group passwords are inherently insecure, | |
| 94 | as there is no way to stop users obtaining the encrypted passwords | |
| 95 | from the group database. | |
| 96 | Their use is discouraged. |