add recursive bind option

[eadmaster]

I'd like to request a recursive bind option that works like this:

proot --recursive-bind /tmp/usr:/usr

Instead of hiding the whole /usr dir it should iterate over /tmp/usr/* and bind all the contained files.

I know the same thing could be implemented with a shellscript, but if there are a lot of files in /tmp/usr/* we could get a very long commandline and the shell may truncate it...

[cedric-vincent]

Hello Andrea,

I'd like to keep PRoot command-line interface as simple as possible, and let users use their favorite programming languages to do more complex things. This is the same reason why PRoot does not have any configuration files. To me, no command-line interface nor configuration syntax can be as powerful as user's favorite programming language (whatever it is) :)

With your example, it's a one-liner in shell:

proot $(cd /tmp/usr; for i in *; do echo "-b /tmp/usr/$i:/usr/$i"; done)

If this command-line is truncated because it is too long, then I should implement support for response files instead, à la GCC http://gcc.gnu.org/wiki/Response_Files

[eadmaster]

the POSIX ARG_MAX averange value is 20k, which should be sufficient in most cases, but the min value is only 4096!

btw the one-liner does not work as expected: we must use find to iterate over files and skip dirs:

proot $(cd /tmp/usr; find -type f -printf " -b /tmp/usr/%p:/usr/%p")

[cedric-vincent]

Hello Andrea,

the POSIX ARG_MAX averange value is 20k, which should be sufficient in most cases, but the min value is only 4096!

Feel free to open a new issue about response file support.

Regards,
Cédric.