test_physfs: parse arguments + add tree command

[madebr]

• CMake will drop support for cmake scripts < 3.5, so bump it to 3.5
• Use rpath for the executables, such that test_physfs uses the newly built libphysfs.so library, instead of the system library. These paths are removed when they are installed.
• Use the alias'ed targets
• Treat arguments as interactive commands. This allows to run commands from the shell without requiring to put them in a file. This was useful while developing in the IDE, not needing to manually enter something. This allows e.g. ./test_physfs "mount /tmp/data_tree /tt 0" "ls /tt" "quit"
• Add a tree command to test_physfs. This works more or less similar to the unix tree command: non-accessible files are ignored + symlinks are not entered.

The following comands:

cat <<EOF >tree.sh
#!/bin/sh

set -e

PARENT=\$(pwd)/data_tree

function create_tree() {
  local i
  if test \$1 -ne 0; then
    for i in \$(seq \$2); do
      mkdir -p "dir\$i"
      pushd "dir\$i" >/dev/null
      create_tree \$(expr \$1 - 1 ) \$2
      popd >/dev/null
      if test \$i -eq 2; then
        chmod 0 dir\$i
      fi
    done
    ln -s "\$PARENT" dir\$(expr \$2 + 1)
  fi
  for i in \$(seq \$2); do
    echo "file\$1" >"file\$i"
  done
}

sudo rm -rf "\$PARENT"
mkdir "\$PARENT"
pushd "\$PARENT" >/dev/null
create_tree 3 3
popd >/dev/null
EOF

sh tree.sh
./test_physfs "mount $PWD/data_tree /tt 0" "tree /tt" "quit"

will output:

...
Enter commands. Enter "help" for instructions.
Successful.
/tt
├── dir1
│   ├── dir1
│   │   ├── dir1
│   │   │   ├── file1
│   │   │   ├── file2
│   │   │   └── file3
│   │   ├── dir2 [Failure. reason: permission denied]
│   │   ├── dir3
│   │   │   ├── file1
│   │   │   ├── file2
│   │   │   └── file3
│   │   ├── file1
│   │   ├── file2
│   │   └── file3
│   ├── dir2 [Failure. reason: permission denied]
│   ├── dir3
│   │   ├── dir1
│   │   │   ├── file1
│   │   │   ├── file2
│   │   │   └── file3
│   │   ├── dir2 [Failure. reason: permission denied]
│   │   ├── dir3
│   │   │   ├── file1
│   │   │   ├── file2
│   │   │   └── file3
│   │   ├── file1
│   │   ├── file2
│   │   └── file3
│   ├── file1
│   ├── file2
│   └── file3
├── dir2 [Failure. reason: permission denied]
├── dir3
│   ├── dir1
│   │   ├── dir1
│   │   │   ├── file1
│   │   │   ├── file2
│   │   │   └── file3
│   │   ├── dir2 [Failure. reason: permission denied]
│   │   ├── dir3
│   │   │   ├── file1
│   │   │   ├── file2
│   │   │   └── file3
│   │   ├── file1
│   │   ├── file2
│   │   └── file3
│   ├── dir2 [Failure. reason: permission denied]
│   ├── dir3
│   │   ├── dir1
│   │   │   ├── file1
│   │   │   ├── file2
│   │   │   └── file3
│   │   ├── dir2 [Failure. reason: permission denied]
│   │   ├── dir3
│   │   │   ├── file1
│   │   │   ├── file2
│   │   │   └── file3
│   │   ├── file1
│   │   ├── file2
│   │   └── file3
│   ├── file1
│   ├── file2
│   └── file3
├── file1
├── file2
└── file3

21 directories, 45 files

(I don't know why no symbolic links show up)

[icculus]

(I don't know why no symbolic links show up)

PhysicsFS explicitly ignores symlinks by default. Try this:

./test_physfs "permitsymlinks 1" "mount $PWD/data_tree /tt 0" "tree /tt" "quit"

[madebr]

Yup, that works.

/tt
├── dir1
│   ├── dir1
│   │   ├── dir1
│   │   │   ├── file1
│   │   │   ├── file2
│   │   │   └── file3
│   │   ├── dir2 [Failure. reason: permission denied]
│   │   ├── dir3
│   │   │   ├── file1
│   │   │   ├── file2
│   │   │   └── file3
│   │   ├── dir4 [symbolic link]
│   │   ├── file1
│   │   ├── file2
│   │   └── file3
│   ├── dir2 [Failure. reason: permission denied]
│   ├── dir3
│   │   ├── dir1
│   │   │   ├── file1
│   │   │   ├── file2
│   │   │   └── file3
│   │   ├── dir2 [Failure. reason: permission denied]
│   │   ├── dir3
│   │   │   ├── file1
│   │   │   ├── file2
│   │   │   └── file3
│   │   ├── dir4 [symbolic link]
│   │   ├── file1
│   │   ├── file2
│   │   └── file3
│   ├── dir4 [symbolic link]
│   ├── file1
│   ├── file2
│   └── file3
├── dir2 [Failure. reason: permission denied]
├── dir3
│   ├── dir1
│   │   ├── dir1
│   │   │   ├── file1
│   │   │   ├── file2
│   │   │   └── file3
│   │   ├── dir2 [Failure. reason: permission denied]
│   │   ├── dir3
│   │   │   ├── file1
│   │   │   ├── file2
│   │   │   └── file3
│   │   ├── dir4 [symbolic link]
│   │   ├── file1
│   │   ├── file2
│   │   └── file3
│   ├── dir2 [Failure. reason: permission denied]
│   ├── dir3
│   │   ├── dir1
│   │   │   ├── file1
│   │   │   ├── file2
│   │   │   └── file3
│   │   ├── dir2 [Failure. reason: permission denied]
│   │   ├── dir3
│   │   │   ├── file1
│   │   │   ├── file2
│   │   │   └── file3
│   │   ├── dir4 [symbolic link]
│   │   ├── file1
│   │   ├── file2
│   │   └── file3
│   ├── dir4 [symbolic link]
│   ├── file1
│   ├── file2
│   └── file3
├── dir4 [symbolic link]
├── file1
├── file2
└── file3