1 import sys, os, pwd, subprocess, errno, socket, select, mmap, stat, re
12 if e.errno == errno.EEXIST:
29 if e.errno == errno.ENOENT:
30 pass # it doesn't exist, that's what you asked for
34 p = subprocess.Popen(argv, stdout=subprocess.PIPE)
40 # FIXME: this function isn't very generic, because it splits the filename
41 # in an odd way and depends on a terminating '/' to indicate directories.
42 # But it's used in a couple of places, so let's put it here.
45 l = [i+'/' for i in l[:-1]] + l[-1:]
47 l.pop() # extra blank caused by terminating '/'
51 # like os.path.realpath, but doesn't follow a symlink for the last element.
52 # (ie. if 'p' itself is itself a symlink, this one won't follow it)
58 if st and stat.S_ISLNK(st.st_mode):
59 (dir, name) = os.path.split(p)
60 dir = os.path.realpath(dir)
61 out = os.path.join(dir, name)
63 out = os.path.realpath(p)
64 #log('realpathing:%r,%r\n' % (p, out))
74 _username = pwd.getpwuid(uid)[0]
76 _username = 'user%d' % uid
86 _userfullname = pwd.getpwuid(uid)[4].split(',')[0]
88 _userfullname = 'user%d' % uid
96 _hostname = socket.getfqdn()
100 class NotOk(Exception):
104 def __init__(self, inp, outp):
108 def read(self, size):
110 return self.inp.read(size)
114 return self.inp.readline()
116 def write(self, data):
117 #log('%d writing: %d bytes\n' % (os.getpid(), len(data)))
118 self.outp.write(data)
121 [rl, wl, xl] = select.select([self.inp.fileno()], [], [], 0)
123 assert(rl[0] == self.inp.fileno())
132 s = re.sub(r'\s+', ' ', str(s))
133 self.write('\nerror %s\n' % s)
135 def _check_ok(self, onempty):
138 for rl in linereader(self.inp):
139 #log('%d got line: %r\n' % (os.getpid(), rl))
140 if not rl: # empty line
144 elif rl.startswith('error '):
145 #log('client: error: %s\n' % rl[6:])
149 raise Exception('server exited unexpectedly; see errors above')
151 def drain_and_check_ok(self):
154 return self._check_ok(onempty)
158 raise Exception('expected "ok", got %r' % rl)
159 return self._check_ok(onempty)
170 def chunkyreader(f, count = None):
173 b = f.read(min(count, 65536))
175 raise IOError('EOF with %d bytes remaining' % count)
186 def __init__(self, it, ondone = None):
194 return self.it.next()
204 if s and not s.endswith('/'):
210 def _mmap_do(f, len, flags, prot):
212 st = os.fstat(f.fileno())
214 map = mmap.mmap(f.fileno(), len, flags, prot)
215 f.close() # map will persist beyond file close
219 def mmap_read(f, len = 0):
220 return _mmap_do(f, len, mmap.MAP_PRIVATE, mmap.PROT_READ)
223 def mmap_readwrite(f, len = 0):
224 return _mmap_do(f, len, mmap.MAP_SHARED, mmap.PROT_READ|mmap.PROT_WRITE)
228 g = re.match(r'([-+\d.e]+)\s*(\w*)', str(s))
230 raise ValueError("can't parse %r as a number" % s)
231 (val, unit) = g.groups()
234 if unit in ['t', 'tb']:
235 mult = 1024*1024*1024*1024
236 elif unit in ['g', 'gb']:
237 mult = 1024*1024*1024
238 elif unit in ['m', 'mb']:
240 elif unit in ['k', 'kb']:
242 elif unit in ['', 'b']:
245 raise ValueError("invalid unit %r in number %r" % (unit, s))
249 # count the number of elements in an iterator (consumes the iterator)
251 return reduce(lambda x,y: x+1, l)
256 saved_errors.append(e)