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