Updates to use cmake GLOB and libbcc.so.0 in python init

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>

examples/tracing/CMakeLists.txt

-set(EXAMPLE_FILES bitehist.c bitehist_example.txt disksnoop.c
-  disksnoop_example.txt task_switch.c tcpv4connect tcpv4connect_example.txt
-  vfsreadlat.c vfsreadlat_example.txt)
-set(EXAMPLE_PROGRAMS bitehist.py disksnoop.py task_switch.py trace_fields.py vfsreadlat.py)
-install(FILES ${EXAMPLE_FILES} DESTINATION share/bcc/examples/tracing)
-install(PROGRAMS ${EXAMPLE_PROGRAMS} DESTINATION share/bcc/examples/tracing)
+file(GLOB C_FILES *.c)
+file(GLOB PY_FILES *.py)
+file(GLOB TXT_FILES *.txt)
+install(PROGRAMS ${PY_FILES} DESTINATION share/bcc/examples/tracing)
+install(FILES ${C_FILES} DESTINATION share/bcc/examples/tracing)
+install(FILES ${TXT_FILES} DESTINATION share/bcc/examples/tracing)

examples/tracing/tcpv4connect_example.txt

-Demonstrations of tcpv4connect, the Linux eBPF/bcc version.
+Demonstrations of tcpv4connect.py, the Linux eBPF/bcc version.
 
 
 This example traces the kernel function performing active TCP IPv4 connections
 (eg, via a connect() syscall; accept() are passive connections). Some example
 output (IP addresses changed to protect the innocent):
 
-# ./tcpv4connect 
+# ./tcpv4connect.py
 PID    COMM         SADDR            DADDR            DPORT
 1479   telnet       127.0.0.1        127.0.0.1        23  
 1469   curl         10.201.219.236   54.245.105.25    80  

man/man8/CMakeLists.txt

-set(FILES biolatency.8 biosnoop.8 funccount.8 funclatency.8 hardirqs.8
-  killsnoop.8 opensnoop.8 pidpersec.8 softirqs.8 syncsnoop.8 tcpaccept.8
-  tcpconnect.8 vfscount.8 vfsstat.8)
+file(GLOB FILES *.8)
 install(FILES ${FILES} DESTINATION share/bcc/man/man8)

src/python/bcc/__init__.py

@@ -24,7 +24,7 @@ from subprocess import Popen, PIPE
 import sys
 basestring = (unicode if sys.version_info[0] < 3 else str)
 
-lib = ct.CDLL("libbcc.so")
+lib = ct.CDLL("libbcc.so.0")
 
 # keep in sync with bpf_common.h
 lib.bpf_module_create_b.restype = ct.c_void_p

tools/CMakeLists.txt

-set(PROGRAMS biolatency biosnoop funccount funclatency hardirqs killsnoop
-  opensnoop pidpersec softirqs syncsnoop tcpaccept tcpconnect vfscount vfsstat)
-set(C_FILES pidpersec.c vfscount.c vfsstat.c)
-set(EXAMPLE_FILES biolatency_example.txt funclatency_example.txt
-  killsnoop_example.txt pidpersec_example.txt syncsnoop_example.txt
-  tcpconnect_example.txt vfsstat_example.txt biosnoop_example.txt
-  funccount_example.txt hardirqs_example.txt opensnoop_example.txt
-  softirqs_example.txt tcpaccept_example.txt vfscount_example.txt)
-install(PROGRAMS ${PROGRAMS} DESTINATION share/bcc/tools)
+file(GLOB C_FILES *.c)
+file(GLOB PY_FILES *.py)
+file(GLOB TXT_FILES *.txt)
+foreach(FIL ${PY_FILES})
+  get_filename_component(FIL_WE ${FIL} NAME_WE)
+  install(PROGRAMS ${FIL} DESTINATION share/bcc/tools RENAME ${FIL_WE})
+endforeach()
 install(FILES ${C_FILES} DESTINATION share/bcc/tools)
-install(FILES ${EXAMPLE_FILES} DESTINATION share/bcc/tools/doc)
+install(FILES ${TXT_FILES} DESTINATION share/bcc/tools/doc)