When doing Python programming it is a nice convention to insert the if
statement `if __name__ == "__main__":` before any main code that does
actual functionalities to ensure the code will be executed only as a
script rather than as an imported module. Hence attach the missing
judgement to bpf_doc.py.
Signed-off-by: Hu Haowen <2023002089@xxxxxxxxxxxxxxxx>
---
scripts/bpf_doc.py | 81 +++++++++++++++++++++++-----------------------
1 file changed, 41 insertions(+), 40 deletions(-)
diff --git a/scripts/bpf_doc.py b/scripts/bpf_doc.py
index 61b7dddedc46..af2a87d97832 100755
--- a/scripts/bpf_doc.py
+++ b/scripts/bpf_doc.py
@@ -851,43 +851,44 @@ class PrinterHelpers(Printer):
###############################################################################
-# If script is launched from scripts/ from kernel tree and can access
-# ../include/uapi/linux/bpf.h, use it as a default name for the file to parse,
-# otherwise the --filename argument will be required from the command line.
-script = os.path.abspath(sys.argv[0])
-linuxRoot = os.path.dirname(os.path.dirname(script))
-bpfh = os.path.join(linuxRoot, 'include/uapi/linux/bpf.h')
-
-printers = {
- 'helpers': PrinterHelpersRST,
- 'syscall': PrinterSyscallRST,
-}
-
-argParser = argparse.ArgumentParser(description="""
-Parse eBPF header file and generate documentation for the eBPF API.
-The RST-formatted output produced can be turned into a manual page with the
-rst2man utility.
-""")
-argParser.add_argument('--header', action='store_true',
- help='generate C header file')
-if (os.path.isfile(bpfh)):
- argParser.add_argument('--filename', help='path to include/uapi/linux/bpf.h',
- default=bpfh)
-else:
- argParser.add_argument('--filename', help='path to include/uapi/linux/bpf.h')
-argParser.add_argument('target', nargs='?', default='helpers',
- choices=printers.keys(), help='eBPF API target')
-args = argParser.parse_args()
-
-# Parse file.
-headerParser = HeaderParser(args.filename)
-headerParser.run()
-
-# Print formatted output to standard output.
-if args.header:
- if args.target != 'helpers':
- raise NotImplementedError('Only helpers header generation is supported')
- printer = PrinterHelpers(headerParser)
-else:
- printer = printers[args.target](headerParser)
-printer.print_all()
+if __name__ == "__main__":
+ # If script is launched from scripts/ from kernel tree and can access
+ # ../include/uapi/linux/bpf.h, use it as a default name for the file to parse,
+ # otherwise the --filename argument will be required from the command line.
+ script = os.path.abspath(sys.argv[0])
+ linuxRoot = os.path.dirname(os.path.dirname(script))
+ bpfh = os.path.join(linuxRoot, 'include/uapi/linux/bpf.h')
+
+ printers = {
+ 'helpers': PrinterHelpersRST,
+ 'syscall': PrinterSyscallRST,
+ }
+
+ argParser = argparse.ArgumentParser(description="""
+ Parse eBPF header file and generate documentation for the eBPF API.
+ The RST-formatted output produced can be turned into a manual page with the
+ rst2man utility.
+ """)
+ argParser.add_argument('--header', action='store_true',
+ help='generate C header file')
+ if (os.path.isfile(bpfh)):
+ argParser.add_argument('--filename', help='path to include/uapi/linux/bpf.h',
+ default=bpfh)
+ else:
+ argParser.add_argument('--filename', help='path to include/uapi/linux/bpf.h')
+ argParser.add_argument('target', nargs='?', default='helpers',
+ choices=printers.keys(), help='eBPF API target')
+ args = argParser.parse_args()
+
+ # Parse file.
+ headerParser = HeaderParser(args.filename)
+ headerParser.run()
+
+ # Print formatted output to standard output.
+ if args.header:
+ if args.target != 'helpers':
+ raise NotImplementedError('Only helpers header generation is supported')
+ printer = PrinterHelpers(headerParser)
+ else:
+ printer = printers[args.target](headerParser)
+ printer.print_all()
--
2.34.1
