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#!/usr/bin/env python
#
import sys, os, string, re
def usage():
print """\
usage: genserv < /etc/services > netbsd/net/services.h
this program is used to generate the hard-coded internet service list for the
Bionic C library.
"""
re_service = re.compile(r"([\d\w\-_]+)\s+(\d+)/(tcp|udp)(.*)")
re_alias = re.compile(r"([\d\w\-_]+)(.*)")
class Service:
def __init__(self,name,port,proto):
self.name = name
self.port = port
self.proto = proto
self.aliases = []
def add_alias(self,alias):
self.aliases.append(alias)
def __str__(self):
result = "\\%0o%s" % (len(self.name),self.name)
result += "\\%0o\\%0o" % (((self.port >> 8) & 255), self.port & 255)
if self.proto == "tcp":
result += "t"
else:
result += "u"
result += "\\%0o" % len(self.aliases)
for alias in self.aliases:
result += "\\%0o%s" % (len(alias), alias)
return result
def parse(f):
result = [] # list of Service objects
for line in f.xreadlines():
if len(line) > 0 and line[-1] == "\n":
line = line[:-1]
if len(line) > 0 and line[-1] == "\r":
line = line[:-1]
line = string.strip(line)
if len(line) == 0 or line[0] == "#":
continue
m = re_service.match(line)
if m:
service = Service( m.group(1), int(m.group(2)), m.group(3) )
rest = string.strip(m.group(4))
while 1:
m = re_alias.match(rest)
if not m:
break
service.add_alias(m.group(1))
rest = string.strip(m.group(2))
result.append(service)
return result
services = parse(sys.stdin)
line = '/* generated by genserv.py - do not edit */\nstatic const char _services[] = "\\\n'
for s in services:
line += str(s)+"\\\n"
line += '\\0";\n'
print line
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