tests/env/env.sh

   1 #!/bin/sh
   2 # Verify behavior of env.
   3
   4 # Copyright (C) 2009-2024 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 <https://www.gnu.org/licenses/>.
  18
  19
  20 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  21 print_ver_ env pwd nice
  22
  23 # A simple shebang program to call "echo" from symlinks like "./-u" or "./--".
  24 echo "#!$abs_top_builddir/src/echo simple_echo" > simple_echo \
  25   || framework_failure_
  26 chmod a+x simple_echo || framework_failure_
  27
  28 # Verify we can run the shebang which is not the case if
  29 # there are spaces in $abs_top_builddir.
  30 ./simple_echo || skip_ "Error running simple_echo script"
  31
  32 # Verify clearing the environment
  33 a=1
  34 export a
  35 env - > out || fail=1
  36 compare /dev/null out || fail=1
  37 env -i > out || fail=1
  38 compare /dev/null out || fail=1
  39 env -u a -i -u a -- > out || fail=1
  40 compare /dev/null out || fail=1
  41 env -i -- a=b > out || fail=1
  42 echo a=b > exp || framework_failure_
  43 compare exp out || fail=1
  44
  45 # These tests verify exact status of internal failure.
  46 returns_ 125 env --- || fail=1 # unknown option
  47 returns_ 125 env -u || fail=1 # missing option argument
  48 returns_ 2 env sh -c 'exit 2' || fail=1 # exit status propagation
  49 returns_ 126 nice . && { returns_ 126 env . || fail=1; } # invalid command
  50 returns_ 127 env no_such || fail=1 # no such command
  51
  52 # POSIX is clear that environ may, but need not be, sorted.
  53 # Environment variable values may contain newlines, which cannot be
  54 # observed by merely inspecting output from env.
  55 # Cygwin requires a minimal environment to launch new processes: execve
  56 # adds missing variables SYSTEMROOT and WINDIR, which show up in a
  57 # subsequent env.  Cygwin also requires /bin to always be part of PATH,
  58 # and attempts to unset or reduce PATH may cause execve to fail.
  59 #
  60 # For these reasons, it is more portable to grep that our desired changes
  61 # took place, rather than comparing output of env over an entire environment.
  62 if env | grep '^ENV_TEST' >/dev/null ; then
  63   skip_ "environment has potential interference from ENV_TEST*"
  64 fi
  65
  66 ENV_TEST1=a
  67 export ENV_TEST1
  68 >out || framework_failure_
  69 env ENV_TEST2= > all || fail=1
  70 grep '^ENV_TEST' all | LC_ALL=C sort >> out || framework_failure_
  71 env -u ENV_TEST1 ENV_TEST3=c > all || fail=1
  72 grep '^ENV_TEST' all | LC_ALL=C sort >> out || framework_failure_
  73 env ENV_TEST1=b > all || fail=1
  74 grep '^ENV_TEST' all | LC_ALL=C sort >> out || framework_failure_
  75 env ENV_TEST2= env > all || fail=1
  76 grep '^ENV_TEST' all | LC_ALL=C sort >> out || framework_failure_
  77 env -u ENV_TEST1 ENV_TEST3=c env > all || fail=1
  78 grep '^ENV_TEST' all | LC_ALL=C sort >> out || framework_failure_
  79 env ENV_TEST1=b env > all || fail=1
  80 grep '^ENV_TEST' all | LC_ALL=C sort >> out || framework_failure_
  81 cat <<EOF >exp || framework_failure_
  82 ENV_TEST1=a
  83 ENV_TEST2=
  84 ENV_TEST3=c
  85 ENV_TEST1=b
  86 ENV_TEST1=a
  87 ENV_TEST2=
  88 ENV_TEST3=c
  89 ENV_TEST1=b
  90 EOF
  91 compare exp out || fail=1
  92
  93 # PATH modifications affect exec.
  94 mkdir unlikely_name || framework_failure_
  95 cat <<EOF > unlikely_name/also_unlikely || framework_failure_
  96 #!/bin/sh
  97 echo pass
  98 EOF
  99 chmod +x unlikely_name/also_unlikely || framework_failure_
 100 returns_ 127 env also_unlikely || fail=1
 101 test x$(PATH=$PATH:unlikely_name env also_unlikely) = xpass || fail=1
 102 test x$(env PATH="$PATH":unlikely_name also_unlikely) = xpass || fail=1
 103
 104 # Explicitly put . on the PATH for the rest of this test.
 105 PATH=$PATH:
 106 export PATH
 107
 108 # Use -- to end options (but not variable assignments).
 109 # On some systems, execve("-i") invokes a shebang script ./-i on PATH as
 110 # '/bin/sh -i', rather than '/bin/sh -- -i', which doesn't do what we want.
 111 # Avoid the issue by using a shebang to 'echo' passing a second parameter
 112 # before the '-i'. See the definition of simple_echo before.
 113 # Test -u, rather than -i, to minimize PATH problems.
 114 ln -s "simple_echo" ./-u || framework_failure_
 115 case $(env -u echo echo good) in
 116   good) ;;
 117   *) fail=1 ;;
 118 esac
 119 case $(env -u echo -- echo good) in
 120   good) ;;
 121   *) fail=1 ;;
 122 esac
 123 case $(env -- -u pass) in
 124   *pass) ;;
 125   *) fail=1 ;;
 126 esac
 127
 128 # After options have ended, the first argument not containing = is a program.
 129 returns_ 127 env a=b -- true || fail=1
 130 ln -s "simple_echo" ./-- || framework_failure_
 131 case $(env a=b -- true || echo fail) in
 132   *true) ;;
 133   *) fail=1 ;;
 134 esac
 135
 136 # No way to directly invoke program name containing =.
 137 cat <<EOF >./c=d || framework_failure_
 138 #!/bin/sh
 139 echo pass
 140 EOF
 141 chmod +x c=d || framework_failure_
 142 test "x$(env c=d echo fail)" = xfail || fail=1
 143 test "x$(env -- c=d echo fail)" = xfail || fail=1
 144 test "x$(env ./c=d echo fail)" = xfail || fail=1
 145 test "x$(env sh -c 'exec "$@"' sh c=d echo fail)" = xpass || fail=1
 146 test "x$(sh -c '\c=d echo fail')" = xpass && #dash 0.5.4 fails so check first
 147   { test "x$(env sh -c '\c=d echo fail')" = xpass || fail=1; }
 148
 149 # catch unsetenv failure, broken through coreutils 8.0
 150 returns_ 125 env -u a=b true || fail=1
 151 returns_ 125 env -u '' true || fail=1
 152
 153 # Verify changing directory.
 154 mkdir empty || framework_failure_
 155 returns_ 125 env --chdir=empty/nonexistent true || fail=1
 156 returns_ 125 env -C empty 2>out || fail=1
 157 printf '%s\n' \
 158   'env: must specify command with --chdir (-C)' \
 159   "Try 'env --help' for more information." > exp ||
 160   framework_failure_
 161 compare exp out || fail=1
 162 exp=$(cd empty && env pwd) || framework_failure_
 163 got=$(env --chdir=empty pwd) || fail=1
 164 test "$exp" = "$got" || fail=1
 165
 166 # Verify argv0 overriding
 167 for arg in 'argv0' ''; do
 168 env -v -a short --argv0=$arg true 2>err || fail=1
 169 cat <<EOF >err_exp || framework_failure_
 170 argv0:     '$arg'
 171 executing: true
 172    arg[0]= '$arg'
 173 EOF
 174 done
 175
 176 Exit $fail