enter revision 1.1.1.1.2.2
1 1.1.1.1.2.2 snj #!/bin/sh 2 1.1.1.1.2.2 snj 3 1.1.1.1.2.2 snj # enter - set up project-specific environment 4 1.1.1.1.2.2 snj 5 1.1.1.1.2.2 snj # @(#) enter.sh 1.5 11/4/89 15:56:03 6 1.1.1.1.2.2 snj 7 1.1.1.1.2.2 snj # initialize 8 1.1.1.1.2.2 snj 9 1.1.1.1.2.2 snj IFS=" 10 1.1.1.1.2.2 snj " 11 1.1.1.1.2.2 snj 12 1.1.1.1.2.2 snj : ${HOME?} ${SHELL=/bin/sh} make sure these are set 13 1.1.1.1.2.2 snj 14 1.1.1.1.2.2 snj # sanity checks... 15 1.1.1.1.2.2 snj 16 1.1.1.1.2.2 snj test $# = 1 || { 17 1.1.1.1.2.2 snj echo "Usage: ${0} project" 1>&2; exit 1 18 1.1.1.1.2.2 snj } 19 1.1.1.1.2.2 snj 20 1.1.1.1.2.2 snj test -r ${HOME}/.${1} || { 21 1.1.1.1.2.2 snj echo "${0}: can't read environment file: '${HOME}/.${1}'" 1>&2; exit 1 22 1.1.1.1.2.2 snj } 23 1.1.1.1.2.2 snj 24 1.1.1.1.2.2 snj test -x ${SHELL} || { 25 1.1.1.1.2.2 snj echo "${0}: can't execute command shell: '${SHELL}'" 1>&2; exit 1 26 1.1.1.1.2.2 snj } 27 1.1.1.1.2.2 snj 28 1.1.1.1.2.2 snj # set up default Bourne-shell prompt 29 1.1.1.1.2.2 snj 30 1.1.1.1.2.2 snj export PS1; PS1="$1%${PS1- }" 31 1.1.1.1.2.2 snj 32 1.1.1.1.2.2 snj # load environment 33 1.1.1.1.2.2 snj 34 1.1.1.1.2.2 snj . ${HOME}/.${1} 35 1.1.1.1.2.2 snj 36 1.1.1.1.2.2 snj # define UPPER and lower-case environment variables with the project name 37 1.1.1.1.2.2 snj 38 1.1.1.1.2.2 snj _PNAME_=`echo ${1} | case \`echo -n\` in # assume $1 lower case 39 1.1.1.1.2.2 snj "") tr a-z A-Z;; # this is for V7, BSD 40 1.1.1.1.2.2 snj *) tr '[a-z]' '[A-Z]';; # and this is for SYSV 41 1.1.1.1.2.2 snj esac` 42 1.1.1.1.2.2 snj eval ${1}=\${${_PNAME_}=\${${1}}} 43 1.1.1.1.2.2 snj 44 1.1.1.1.2.2 snj eval test "X\${${1}}" != X || { 45 1.1.1.1.2.2 snj echo "${0}: ${HOME}/.${1} should set '${1}' or '${_PNAME_}'" 1>&2; exit 1 46 1.1.1.1.2.2 snj } 47 1.1.1.1.2.2 snj 48 1.1.1.1.2.2 snj export ${1} MANPATH PATH ${_PNAME_} 49 1.1.1.1.2.2 snj 50 1.1.1.1.2.2 snj # become a new shell 51 1.1.1.1.2.2 snj 52 1.1.1.1.2.2 snj echo "Entering project '${1}' - leave with 'exit' or 'control-d'" 1>&2 53 1.1.1.1.2.2 snj 54 1.1.1.1.2.2 snj exec ${SHELL} 55 1.1.1.1.2.2 snj 56 1.1.1.1.2.2 snj echo "project ${1} NOT entered" 1>&2; exit 1; 57 1.1.1.1.2.2 snj 58 1.1.1.1.2.2 snj #++ 59 1.1.1.1.2.2 snj # NAME 60 1.1.1.1.2.2 snj # enter 1 61 1.1.1.1.2.2 snj # SUMMARY 62 1.1.1.1.2.2 snj # set up a project-specific environment 63 1.1.1.1.2.2 snj # PROJECT 64 1.1.1.1.2.2 snj # sdetools 65 1.1.1.1.2.2 snj # SYNOPSIS 66 1.1.1.1.2.2 snj # enter project 67 1.1.1.1.2.2 snj # exit 68 1.1.1.1.2.2 snj # DESCRIPTION 69 1.1.1.1.2.2 snj # The \fIenter\fR command sets up an environment that makes 70 1.1.1.1.2.2 snj # it easy to access \fIproject\fR-specific programs and files. 71 1.1.1.1.2.2 snj # 72 1.1.1.1.2.2 snj # \fIenter\fP consults a file with environment information 73 1.1.1.1.2.2 snj # ($HOME/.\fIproject\fR, Bourne-shell syntax) and invokes 74 1.1.1.1.2.2 snj # a new command shell of the same type as the login shell. 75 1.1.1.1.2.2 snj # Typically, project environment files are maintained and 76 1.1.1.1.2.2 snj # given out by the project administrator. 77 1.1.1.1.2.2 snj # 78 1.1.1.1.2.2 snj # In order to leave the project environment use the \fIexit\fP 79 1.1.1.1.2.2 snj # command or type a control-d; 80 1.1.1.1.2.2 snj # the details may depend on the type of login shell involved. 81 1.1.1.1.2.2 snj # 82 1.1.1.1.2.2 snj # As a minimum, the environment file should set an environment 83 1.1.1.1.2.2 snj # variable with the same name as the \fIproject\fP. The variable 84 1.1.1.1.2.2 snj # name can be either be identical to \fIproject\fP or in upper case. 85 1.1.1.1.2.2 snj # For consistency, \fIenter\fP will set both variables to the same value. 86 1.1.1.1.2.2 snj # EXAMPLE 87 1.1.1.1.2.2 snj # .fi 88 1.1.1.1.2.2 snj # .ad 89 1.1.1.1.2.2 snj # In this example, 90 1.1.1.1.2.2 snj # all files pertaining to a project \fIfoobar\fR are located under the 91 1.1.1.1.2.2 snj # directory \fI/usr/foo/bar/foobar\fR. For example, there 92 1.1.1.1.2.2 snj # are subdirectories 93 1.1.1.1.2.2 snj # \fI/usr/foo/bar/foobar/man\fR with manual pages, 94 1.1.1.1.2.2 snj # \fI/usr/foo/bar/foobar/bin\fR with executable 95 1.1.1.1.2.2 snj # programs, other directories for object libraries and include files, 96 1.1.1.1.2.2 snj # and so on. 97 1.1.1.1.2.2 snj # 98 1.1.1.1.2.2 snj # In order to enter a project \fIfoobar\fR, the command 99 1.1.1.1.2.2 snj # .PP 100 1.1.1.1.2.2 snj # .ti +5 101 1.1.1.1.2.2 snj # .ft C 102 1.1.1.1.2.2 snj # enter foobar 103 1.1.1.1.2.2 snj # .ft 104 1.1.1.1.2.2 snj # .PP 105 1.1.1.1.2.2 snj # consults a file \fI.foobar\fR (in the user\'s home directory) 106 1.1.1.1.2.2 snj # with contents: 107 1.1.1.1.2.2 snj # .PP 108 1.1.1.1.2.2 snj # .ft C 109 1.1.1.1.2.2 snj # .nf 110 1.1.1.1.2.2 snj # .in +5 111 1.1.1.1.2.2 snj # export FOOBAR; FOOBAR=/usr/foo/bar/foobar 112 1.1.1.1.2.2 snj # export PATH; PATH=$PATH:$FOOBAR/bin 113 1.1.1.1.2.2 snj # export MANPATH; MANPATH=$MANPATH:$FOOBAR/man 114 1.1.1.1.2.2 snj # .ft 115 1.1.1.1.2.2 snj # .fi 116 1.1.1.1.2.2 snj # .PP 117 1.1.1.1.2.2 snj # The second line automatically makes all project-specific 118 1.1.1.1.2.2 snj # executable programs accessible. The third line makes it possible 119 1.1.1.1.2.2 snj # to use the standard UNIX \fIman\fR command for retrieval of 120 1.1.1.1.2.2 snj # project-specific manual pages. The \fIenter\fR command 121 1.1.1.1.2.2 snj # makes sure that both the \fIfoobar\fR and \fIFOOBAR\fR 122 1.1.1.1.2.2 snj # environment variables are set to the same value. 123 1.1.1.1.2.2 snj # COMMANDS 124 1.1.1.1.2.2 snj # sh(1), echo(1), test(1), tr(1), login shell 125 1.1.1.1.2.2 snj # FILES 126 1.1.1.1.2.2 snj # $HOME/.\fIproject\fR 127 1.1.1.1.2.2 snj # ENVIRONMENT VARIABLES 128 1.1.1.1.2.2 snj # SHELL, login shell 129 1.1.1.1.2.2 snj # HOME, login directory 130 1.1.1.1.2.2 snj # PATH, search path for commands 131 1.1.1.1.2.2 snj # MANPATH, search path for the \fIman\fR command. 132 1.1.1.1.2.2 snj # BUGS 133 1.1.1.1.2.2 snj # Name clashes may occur if people have entered several projects 134 1.1.1.1.2.2 snj # at the same time. This can be avoided by using unique project names, 135 1.1.1.1.2.2 snj # which is a good idea anyway. 136 1.1.1.1.2.2 snj # AUTHOR(S) 137 1.1.1.1.2.2 snj # W.Z. Venema 138 1.1.1.1.2.2 snj # Eindhoven University of Technology 139 1.1.1.1.2.2 snj # Department of Mathematics and Computer Science 140 1.1.1.1.2.2 snj # Den Dolech 2, P.O. Box 513, 5600 MB Eindhoven, The Netherlands 141 1.1.1.1.2.2 snj # CREATION DATE 142 1.1.1.1.2.2 snj # Tue Apr 19 15:35:41 MET DST 1988 143 1.1.1.1.2.2 snj # STATUS 144 1.1.1.1.2.2 snj # enter.sh 1.5 11/4/89 15:56:03 (draft) 145 1.1.1.1.2.2 snj #-- 146
Indexes created Mon Oct 26 00:26:21 UTC 2026