Initial Contribution

libc/tools/genserv.py

@@ -0,0 +1,76 @@
+#!/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
+
+