Fixescontainers/bubblewrap#91
Add the ability to overwrite argv[0] when starting a process in a
container. Using --argv0 to be consistent with ld.so --argv0.
Overwriting argv[0] is useful as some tools change their behavior based
on the value of argv[0]. For example, when bash is symlinked to sh it
behaves as sh. Similarly, unxz is a symlink to xz and changes the
default from compressing to decompressing. An extreme example is on many
systems, date, df, cat and so on are all symlinks to the coreutils
binary.
Example usage: bwrap --bind / / --argv0 sh bash
Signed-off-by: Jonathan Wright <quaggy@gmail.com>
4303430642