tests/misc/printenv.sh

   1 #!/bin/sh
   2 # Verify behavior of printenv.
   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 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  20 print_ver_ printenv
  21
  22 # Without arguments, printenv behaves like env.  Some shells provide
  23 # printenv as a builtin, so we must invoke it via "env".
  24 # But beware of $_, set by many shells to the last command run.
  25 # Also, filter out LD_PRELOAD, which is set when running under valgrind.
  26 # Note the apparently redundant "env  env": this is to ensure to get
  27 # env's output the same way as that of printenv and works around a bug
  28 # on aarch64 at least where libc's execvp reverses the order of the
  29 # output.
  30 env -- env | grep -Ev '^(_|LD_PRELOAD)=' > exp || framework_failure_
  31 env -- printenv | grep -Ev '^(_|LD_PRELOAD)=' > out || fail=1
  32 compare exp out || fail=1
  33
  34 # POSIX is clear that environ may, but need not be, sorted.
  35 # Environment variable values may contain newlines, which cannot be
  36 # observed by merely inspecting output from printenv.
  37 if env -- printenv | grep '^ENV_TEST' >/dev/null ; then
  38   skip_ "environment has potential interference from ENV_TEST*"
  39 fi
  40
  41 # Printing a single variable's value.
  42 returns_ 1 env -- printenv ENV_TEST > out || fail=1
  43 compare /dev/null out || fail=1
  44 echo a > exp || framework_failure_
  45 ENV_TEST=a env -- printenv ENV_TEST > out || fail=1
  46 compare exp out || fail=1
  47
  48 # Printing multiple variables.  Order follows command line.
  49 ENV_TEST1=a ENV_TEST2=b env -- printenv ENV_TEST2 ENV_TEST1 ENV_TEST2 > out \
  50   || fail=1
  51 ENV_TEST1=a ENV_TEST2=b env -- printenv ENV_TEST1 ENV_TEST2 >> out || fail=1
  52 cat <<EOF > exp || framework_failure_
  53 b
  54 a
  55 b
  56 a
  57 b
  58 EOF
  59 compare exp out || fail=1
  60
  61 # Exit status reflects missing variable, but remaining arguments processed.
  62 export ENV_TEST1=a
  63 returns_ 1 env -- printenv ENV_TEST2 ENV_TEST1 > out || fail=1
  64 returns_ 1 env -- printenv ENV_TEST1 ENV_TEST2 >> out || fail=1
  65 unset ENV_TEST1
  66 cat <<EOF > exp || framework_failure_
  67 a
  68 a
  69 EOF
  70 compare exp out || fail=1
  71
  72 # Non-standard environment variable name.  Shells won't create it, but
  73 # env can, and printenv must be able to deal with it.
  74 echo b > exp || framework_failure_
  75 env -- -a=b printenv -- -a > out || fail=1
  76 compare exp out || fail=1
  77
  78 # Silently reject invalid env-var names.
  79 # Bug present through coreutils 8.0.
  80 returns_ 1 env a=b=c printenv a=b > out || fail=1
  81 compare /dev/null out || fail=1
  82
  83 Exit $fail