tests/bin/sh/dotcmd/scoped_command

   1 #!/bin/sh
   2 #
   3 # $NetBSD: scoped_command,v 1.1 2014/05/31 14:29:06 christos Exp $
   4 #
   5 # Copyright (c) 2014 The NetBSD Foundation, Inc.
   6 # All rights reserved.
   7 #
   8 # This code is derived from software contributed to The NetBSD Foundation
   9 # by Jarmo Jaakkola.
  10 #
  11 # Redistribution and use in source and binary forms, with or without
  12 # modification, are permitted provided that the following conditions
  13 # are met:
  14 # 1. Redistributions of source code must retain the above copyright
  15 #    notice, this list of conditions and the following disclaimer.
  16 # 2. Redistributions in binary form must reproduce the above copyright
  17 #    notice, this list of conditions and the following disclaimer in the
  18 #    documentation and/or other materials provided with the distribution.
  19 #
  20 # THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  21 # ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22 # TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23 # PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  24 # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30 # POSSIBILITY OF SUCH DAMAGE.
  31 #
  32
  33 set -e
  34
  35 # USAGE:
  36 #   scoped_command scope cmd msg var_suffix
  37 #
  38 # Write to stdout a piece of Bourne Shell script with _cmd_ in specific
  39 # _scope_.  The execution of _cmd_ is bracketed by prints of "before _msg_"
  40 # and "after _msg_, return value ${?}".  If the generated script uses
  41 # variables, __var_suffix_ is appended to their names to allow nesting of
  42 # scripts generated this way.
  43 #
  44 # _scope_ should be one of: case, compound, file, for, func, subshell,
  45 # until, while.
  46 # _cmd_ is the command line to execute.  Remember proper quoting!
  47 # _msg_ is text that will be used inside single quotes.
  48 # _var_suffix_ is a syntactically valid identifier name.
  49
  50 # don't rely on command lists (';')
  51 cmd="echo 'before ${3}'
  52 ${2}
  53 echo 'after ${3}, return value:' ${?}"
  54
  55 echo "#!/bin/sh"
  56
  57 [ 'func' = "${1}" ] && cat <<EOF
  58 func()
  59 {
  60     echo 'before ${3}'
  61     \${1}
  62     echo 'after ${3}'
  63 }
  64
  65 echo 'before function'
  66 func "${2}" "${3}"  # don't rely on 'shift'
  67 echo 'after function'
  68 EOF
  69
  70 [ 'case' = "${1}" ] && cat <<EOF
  71 echo 'before case'
  72 case 'a' in
  73     a)  ${cmd};;
  74 esac
  75 echo 'after case'
  76 EOF
  77
  78 [ 'file' = "${1}" ] && cat <<EOF
  79 ${cmd}
  80 EOF
  81
  82 [ 'while' = "${1}" ] && cat <<EOF
  83 echo 'before while'
  84 cond_${4}='true true false'
  85 while \${cond_${4}}
  86 do
  87     cond_${4}="\${cond_${4}#* }"
  88     ${cmd}
  89 done
  90 echo 'after while'
  91 EOF
  92
  93 [ 'until' = "${1}" ] && cat <<EOF
  94 echo 'before until'
  95 cond_${4}='false false true'
  96 until \${cond_${4}}
  97 do
  98     cond_${4}="\${cond_${4}#* }"
  99     ${cmd}
 100 done
 101 echo 'after until'
 102 EOF
 103
 104 [ 'for' = "${1}" ] && cat <<EOF
 105 echo 'before for'
 106 for i_${4} in 1 2
 107 do
 108     ${cmd}
 109 done
 110 echo 'after for'
 111 EOF
 112
 113 [ 'subshell' = "${1}" ] && cat <<EOF
 114 (
 115     echo 'subshell start'
 116     ${cmd}
 117     echo 'subshell end'
 118 )
 119 EOF
 120
 121 [ 'compound' = "${1}" ] && cat <<EOF
 122 {
 123     echo 'compound start'
 124     ${cmd};
 125     echo 'compound end'
 126 }
 127 EOF
 128
 129 exit 0