| #!/usr/bin/env python3 |
| # |
| |
| import sys, os, string, re |
| |
| def usage(): |
| print"""\ |
| usage: genserv < /etc/services > libc/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\-_]+)(.*)") |
| |
| classService: |
| 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 aliasin self.aliases: |
| result+="\\%0o%s"%(len(alias), alias) |
| |
| return result |
| |
| def parse(f): |
| result=[]# list of Service objects |
| for linein f.xreadlines(): |
| if len(line)>0and line[-1]=="\n": |
| line= line[:-1] |
| if len(line)>0and line[-1]=="\r": |
| line= line[:-1] |
| |
| line= string.strip(line) |
| if len(line)==0or 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)) |
| |
| while1: |
| m= re_alias.match(rest) |
| ifnot 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 sin services: |
| line+= str(s)+"\\\n" |
| line+='\\0";\n' |
| print line |
