tests/misc/env

   1 #!/bin/sh
   2 # Verify behavior of env.
   3
   4 # Copyright (C) 2009-2012 Free Software Foundation, Inc.
   5
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18
  19
  20 . "${srcdir=.}/init.sh"; path_prepend_ ../src
  21 print_ver_ env
  22
  23
  24 # Verify clearing the environment
  25 a=1
  26 export a
  27 env - > out || fail=1
  28 test -s out && fail=1
  29 env -i > out || fail=1
  30 test -s out && fail=1
  31 env -u a -i -u a -- > out || fail=1
  32 test -s out && fail=1
  33 env -i -- a=b > out || fail=1
  34 echo a=b > exp || framework_failure_
  35 compare exp out || fail=1
  36
  37 # These tests verify exact status of internal failure.
  38 env --- # unknown option
  39 test $? = 125 || fail=1
  40 env -u # missing option argument
  41 test $? = 125 || fail=1
  42 env sh -c 'exit 2' # exit status propagation
  43 test $? = 2 || fail=2
  44 env . # invalid command
  45 test $? = 126 || fail=1
  46 env no_such # no such command
  47 test $? = 127 || fail=1
  48
  49 # POSIX is clear that environ may, but need not be, sorted.
  50 # Environment variable values may contain newlines, which cannot be
  51 # observed by merely inspecting output from env.
  52 # Cygwin requires a minimal environment to launch new processes: execve
  53 # adds missing variables SYSTEMROOT and WINDIR, which show up in a
  54 # subsequent env.  Cygwin also requires /bin to always be part of PATH,
  55 # and attempts to unset or reduce PATH may cause execve to fail.
  56 #
  57 # For these reasons, it is more portable to grep that our desired changes
  58 # took place, rather than comparing output of env over an entire environment.
  59 if env | grep '^ENV_TEST' >/dev/null ; then
  60   skip_ "environment has potential interference from ENV_TEST*"
  61 fi
  62
  63 ENV_TEST1=a
  64 export ENV_TEST1
  65 : >out || framework_failure_
  66 env ENV_TEST2= > all || fail=1
  67 grep '^ENV_TEST' all | LC_ALL=C sort >> out || framework_failure_
  68 env -u ENV_TEST1 ENV_TEST3=c > all || fail=1
  69 grep '^ENV_TEST' all | LC_ALL=C sort >> out || framework_failure_
  70 env ENV_TEST1=b > all || fail=1
  71 grep '^ENV_TEST' all | LC_ALL=C sort >> out || framework_failure_
  72 env ENV_TEST2= env > all || fail=1
  73 grep '^ENV_TEST' all | LC_ALL=C sort >> out || framework_failure_
  74 env -u ENV_TEST1 ENV_TEST3=c env > all || fail=1
  75 grep '^ENV_TEST' all | LC_ALL=C sort >> out || framework_failure_
  76 env ENV_TEST1=b env > all || fail=1
  77 grep '^ENV_TEST' all | LC_ALL=C sort >> out || framework_failure_
  78 cat <<EOF >exp || framework_failure_
  79 ENV_TEST1=a
  80 ENV_TEST2=
  81 ENV_TEST3=c
  82 ENV_TEST1=b
  83 ENV_TEST1=a
  84 ENV_TEST2=
  85 ENV_TEST3=c
  86 ENV_TEST1=b
  87 EOF
  88 compare exp out || fail=1
  89
  90 # PATH modifications affect exec.
  91 mkdir unlikely_name || framework_failure_
  92 cat <<EOF > unlikely_name/also_unlikely || framework_failure_
  93 #!/bin/sh
  94 echo pass
  95 EOF
  96 chmod +x unlikely_name/also_unlikely || framework_failure_
  97 env also_unlikely && fail=1
  98 test x`PATH=$PATH:unlikely_name env also_unlikely` = xpass || fail=1
  99 test x`env PATH="$PATH":unlikely_name also_unlikely` = xpass || fail=1
 100
 101 # Explicitly put . on the PATH for the rest of this test.
 102 PATH=$PATH:
 103 export PATH
 104
 105 # Use -- to end options (but not variable assignments).
 106 # On some systems, execve("-i") invokes a shebang script ./-i on PATH as
 107 # '/bin/sh -i', rather than '/bin/sh -- -i', which doesn't do what we want.
 108 # Avoid the issue by using an executable rather than a script.
 109 # Test -u, rather than -i, to minimize PATH problems.
 110 ln -s "$abs_top_builddir/src/echo" ./-u || framework_failure_
 111 case `env -u echo echo good` in
 112   good) ;;
 113   *) fail=1 ;;
 114 esac
 115 case `env -u echo -- echo good` in
 116   good) ;;
 117   *) fail=1 ;;
 118 esac
 119 case `env -- -u pass` in
 120   pass) ;;
 121   *) fail=1 ;;
 122 esac
 123
 124 # After options have ended, the first argument not containing = is a program.
 125 env a=b -- true
 126 test $? = 127 || fail=1
 127 ln -s "$abs_top_builddir/src/echo" ./-- || framework_failure_
 128 case `env a=b -- true || echo fail` in
 129   true) ;;
 130   *) fail=1 ;;
 131 esac
 132
 133 # No way to directly invoke program name containing =.
 134 cat <<EOF >./c=d || framework_failure_
 135 #!/bin/sh
 136 echo pass
 137 EOF
 138 chmod +x c=d || framework_failure_
 139 test "x`env c=d echo fail`" = xfail || fail=1
 140 test "x`env -- c=d echo fail`" = xfail || fail=1
 141 test "x`env ./c=d echo fail`" = xfail || fail=1
 142 test "x$(env sh -c 'exec "$@"' sh c=d echo fail)" = xpass || fail=1
 143 test "x$(sh -c '\c=d echo fail')" = xpass && #dash 0.5.4 fails so check first
 144   { test "x$(env sh -c '\c=d echo fail')" = xpass || fail=1; }
 145
 146 # catch unsetenv failure, broken through coreutils 8.0
 147 env -u a=b true && fail=1
 148 test $? = 125 || fail=1
 149 env -u '' true && fail=1
 150 test $? = 125 || fail=1
 151
 152 Exit $fail