* fixed shebangs in tools (and lib)

* fixed shebangs in examples

* do not mangle shebangs in rpm spec

* renamed style-check.sh to c-style-check.sh

* factored out python linter to a separate file

* added shebang validation to the py-style-check

* added shebangs to all python executables

Fixes: #1280
Signed-off-by: Brenden Blanco <bblanco@gmail.com>

Compiled BPF programs must consist of a single contiguous code block,
meaning trying to call other function entry points (besides the
kernel-defined helpers) is not possible. The bcc frontend didn't
explicitly prohibit this, even though the program would fail to
compile/load. Add an explicit check and error message.

Fixes: #653
Signed-off-by: Brenden Blanco <bblanco@gmail.com>

In order not to miss some files in the tools and examples source
directories, use cmake file(GLOB) to collect relevant files. To ease the
implementation, move all tools to be .py suffixed in the source, but
sans-suffix in the installation (same as before)

In addition, to prevent future API breakage confusion (though of course
that may still happen), use CDLL("libbcc.so.0") in the bcc __init__.py.

Fixes: #317
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

no functional changes

Signed-off-by: Alexei Starovoitov <ast@fb.com>

* Rename python module to bcc
* Rename python-bpf (deb,rpm) package to python-bcc
* Pending this change, I will likely re-tag 0.1.6, and upload the bcc
  package to pypi.python.org

Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Calling delete on an array type map entry does not have an effect.
Instead, the entry needs to be zeroed out, since the array slot always
exists. To avoid unnecessary calls to update(), only call update() when
the map type is array-like. The type was not exposed to python up until
now, so add it.

Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Per feedback on the attach_kprobe api, change up the arguments to remove
the load_func that typically preceeds the call. Instead, move this
inside the attach_kprobe implementation. Also, this makes attach_kprobe
need to be non-static. The same applies to attach_kretprobe.

Old:
fn = b.load_func("hello", BPF.KPROBE)
BPF.attach_kprobe(fn, "sys_clone")

New:
b.attach_kprobe(event="sys_clone", fn_name="hello")

Note that the kwarg style is not required, but I fixed up the current
usages to provide readability.

Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>