tests/run-make/inaccessible-temp-dir/Makefile

   1 # only-linux
   2 # ignore-arm - linker error on `armhf-gnu`
   3
   4 include ../tools.mk
   5
   6 # Issue #66530: We would ICE if someone compiled with `-o /dev/null`,
   7 # because we would try to generate auxiliary files in `/dev/` (which
   8 # at least the OS X file system rejects).
   9 #
  10 # An attempt to `-Ztemps-dir` into a directory we cannot write into should
  11 # indeed be an error; but not an ICE.
  12 #
  13 # However, some folks run tests as root, which can write `/dev/` and end
  14 # up clobbering `/dev/null`. Instead we'll use an inaccessible path, which
  15 # also used to ICE, but even root can't magically write there.
  16 #
  17 # Note that `-Ztemps-dir` uses `create_dir_all` so it is not sufficient to
  18 # use a directory with non-existing parent like `/does-not-exist/output`.
  19
  20 all:
  21         # Create an inaccessible directory
  22         mkdir $(TMPDIR)/inaccessible
  23         chmod 000 $(TMPDIR)/inaccessible
  24
  25         # Run rustc with `-Ztemps-dir` set to a directory
  26         # *inside* the inaccessible one, so that it can't create it
  27         $(RUSTC) program.rs -Ztemps-dir=$(TMPDIR)/inaccessible/tmp 2>&1 \
  28                 | $(CGREP) 'failed to find or create the directory specified by `--temps-dir`'
  29
  30         # Make the inaccessible directory accessible,
  31         # so that compiletest can delete the temp dir
  32         chmod +rw $(TMPDIR)/inaccessible