This patch uses mmap() to read /data/system/packages.list
This avoids depending on the size of a fixed static buffer
which may happen to be too short for systems with a lot of
packages installed.
Also avoids calling malloc() which we don't want to trust here
since run-as is a setuid program.
Change-Id: I1d640a08b5d73af2fc80546b01c8d970c7f6b514
This patch increases the size of the internal buffer used by run-as
to store the content of /data/system/packages.list from 8KB to 64KB.
It has been reported that, on some systems, 8KB was too small. This
resulted in a truncated file being loaded, and the inability to debug
native applications properly (either because the application was not
found in the list, or because the tool reported a 'corrupted
installation' due to BAD_FORMAT issues when parsing the truncated
file).
See http://code.google.com/p/android/issues/detail?id=16391
Change-Id: I0c35a61b163c4abc6f1a2681adc0ef0d76493171
Typical usage is 'run-as <package-name> <command>' to run <command>
in the data directory, and the user id, of <package-name> if, and only
if <package-name> is the name of an installed and debuggable application.
This relies on the /data/system/packages.list file generated by the
PackageManager service.
BEWARE: This is intended to be available on production devices !
