--- /dev/null
+# pty.py -- Pseudo terminal utilities.
+
+# Bugs: No signal handling. Doesn't set slave termios and window size.
+# Only tested on Linux.
+# See: W. Richard Stevens. 1992. Advanced Programming in the
+# UNIX Environment. Chapter 19.
+# Author: Steen Lumholt -- with additions by Guido.
+
+from select import select
+import os, sys, FCNTL
+import tty
+
+STDIN_FILENO = 0
+STDOUT_FILENO = 1
+STDERR_FILENO = 2
+
+CHILD = 0
+
+# Open pty master. Returns (master_fd, tty_name). SGI and Linux/BSD version.
+def master_open():
+ try:
+ import sgi
+ except ImportError:
+ pass
+ else:
+ try:
+ tty_name, master_fd = sgi._getpty(FCNTL.O_RDWR, 0666, 0)
+ except IOError, msg:
+ raise os.error, msg
+ return master_fd, tty_name
+ for x in 'pqrstuvwxyzPQRST':
+ for y in '0123456789abcdef':
+ pty_name = '/dev/pty' + x + y
+ try:
+ fd = os.open(pty_name, FCNTL.O_RDWR)
+ except os.error:
+ continue
+ return (fd, '/dev/tty' + x + y)
+ raise os.error, 'out of pty devices'
+
+# Open the pty slave. Acquire the controlling terminal.
+# Returns file descriptor. Linux version. (Should be universal? --Guido)
+def slave_open(tty_name):
+ return os.open(tty_name, FCNTL.O_RDWR)
+
+# Fork and make the child a session leader with a controlling terminal.
+# Returns (pid, master_fd)
+def fork():
+ master_fd, tty_name = master_open()
+ pid = os.fork()
+ if pid == CHILD:
+ # Establish a new session.
+ os.setsid()
+
+ # Acquire controlling terminal.
+ slave_fd = slave_open(tty_name)
+ os.close(master_fd)
+
+ # Slave becomes stdin/stdout/stderr of child.
+ os.dup2(slave_fd, STDIN_FILENO)
+ os.dup2(slave_fd, STDOUT_FILENO)
+ os.dup2(slave_fd, STDERR_FILENO)
+ if (slave_fd > STDERR_FILENO):
+ os.close (slave_fd)
+
+ # Parent and child process.
+ return pid, master_fd
+
+# Write all the data to a descriptor.
+def writen(fd, data):
+ while data != '':
+ n = os.write(fd, data)
+ data = data[n:]
+
+# Default read function.
+def read(fd):
+ return os.read(fd, 1024)
+
+# Parent copy loop.
+# Copies
+# pty master -> standard output (master_read)
+# standard input -> pty master (stdin_read)
+def copy(master_fd, master_read=read, stdin_read=read):
+ while 1:
+ rfds, wfds, xfds = select(
+ [master_fd, STDIN_FILENO], [], [])
+ if master_fd in rfds:
+ data = master_read(master_fd)
+ os.write(STDOUT_FILENO, data)
+ if STDIN_FILENO in rfds:
+ data = stdin_read(STDIN_FILENO)
+ writen(master_fd, data)
+
+# Create a spawned process.
+def spawn(argv, master_read=read, stdin_read=read):
+ if type(argv) == type(''):
+ argv = (argv,)
+ pid, master_fd = fork()
+ if pid == CHILD:
+ apply(os.execlp, (argv[0],) + argv)
+ mode = tty.tcgetattr(STDIN_FILENO)
+ tty.setraw(STDIN_FILENO)
+ try:
+ copy(master_fd, master_read, stdin_read)
+ except:
+ tty.tcsetattr(STDIN_FILENO, tty.TCSAFLUSH, mode)
--- /dev/null
+# Parse (absolute and relative) URLs according to latest internet draft:
+
+# Uniform Resource Identifiers Working Group R. Fielding
+# INTERNET-DRAFT UC Irvine
+# Expires February 24, 1995 August 24, 1994
+#
+# Relative Uniform Resource Locators
+# <draft-ietf-uri-relative-url-00.txt>
+
+# Standard/builtin Python modules
+import string
+
+# A classification of schemes ('' means apply by default)
+uses_relative = ['ftp', 'http', 'gopher', 'nntp', 'wais', 'file',
+ 'prospero', '']
+uses_netloc = ['ftp', 'http', 'gopher', 'nntp', 'telnet', 'wais',
+ 'file', 'prospero', '']
+non_hierarchical = ['gopher', 'mailto', 'news', 'telnet', 'wais']
+uses_params = ['ftp', 'prospero', '']
+uses_query = ['http', 'wais', '']
+uses_fragment = ['ftp', 'http', 'gopher', 'news', 'nntp', 'wais',
+ 'file', 'prospero', '']
+
+# Characters valid in scheme names
+scheme_chars = string.letters + string.digits + '+-.'
+
+# Parse a URL into 6 components:
+# <scheme>://<netloc>/<path>;<params>?<query>#<fragment>
+# Return a 6-tuple: (scheme, netloc, path, params, query, fragment).
+# Note that we don't break the components up in smaller bits
+# (e.g. netloc is a single string) and we don't expand % escapes.
+def urlparse(url, scheme = '', allow_framents = 1):
+ netloc = ''
+ path = ''
+ params = ''
+ query = ''
+ fragment = ''
+ i = string.find(url, ':')
+ if i > 0:
+ for c in url[:i]:
+ if c not in scheme_chars:
+ break
+ else:
+ scheme, url = string.lower(url[:i]), url[i+1:]
+ if scheme in uses_netloc:
+ if url[:2] == '//':
+ i = string.find(url, '/', 2)
+ if i < 0:
+ i = len(url)
+ netloc, url = url[2:i], url[i:]
+ if allow_framents and scheme in uses_fragment:
+ i = string.rfind(url, '#')
+ if i >= 0:
+ url, fragment = url[:i], url[i+1:]
+ if scheme in uses_query:
+ i = string.find(url, '?')
+ if i >= 0:
+ url, query = url[:i], url[i+1:]
+ if scheme in uses_params:
+ i = string.find(url, ';')
+ if i >= 0:
+ url, params = url[:i], url[i+1:]
+ return scheme, netloc, url, params, query, fragment
+
+# Put a parsed URL back together again. This may result in a slightly
+# different, but equivalent URL, if the URL that was parsed originally
+# had redundant delimiters, e.g. a ? with an empty query (the draft
+# states that these are equivalent).
+def urlunparse((scheme, netloc, url, params, query, fragment)):
+ if netloc:
+ url = '//' + netloc + url
+ if scheme:
+ url = scheme + ':' + url
+ if params:
+ url = url + ';' + params
+ if query:
+ url = url + '?' + query
+ if fragment:
+ url = url + '#' + fragment
+ return url
+
+# Join a base URL and a possibly relative URL to form an absolute
+# interpretation of the latter.
+def urljoin(base, url, allow_framents = 1):
+ if not base:
+ return url
+ bscheme, bnetloc, bpath, bparams, bquery, bfragment = \
+ urlparse(base, '', allow_framents)
+ scheme, netloc, path, params, query, fragment = \
+ urlparse(url, bscheme, allow_framents)
+ if scheme != bscheme or scheme not in uses_relative:
+ return urlunparse((scheme, netloc, path,
+ params, query, fragment))
+ if scheme in uses_netloc:
+ if netloc:
+ return urlunparse((scheme, netloc, path,
+ params, query, fragment))
+ netloc = bnetloc
+ if path[:1] == '/':
+ return urlunparse((scheme, netloc, path,
+ params, query, fragment))
+ if not path:
+ path = bpath
+ if not query:
+ query = bquery
+ return urlunparse((scheme, netloc, path,
+ params, query, fragment))
+ i = string.rfind(bpath, '/')
+ if i < 0:
+ i = len(bpath)
+ path = bpath[:i] + '/' + path
+ segments = string.splitfields(path, '/')
+ if segments[-1] == '.':
+ segments[-1] = ''
+ while '.' in segments:
+ segments.remove('.')
+ while 1:
+ i = 1
+ n = len(segments) - 1
+ while i < n:
+ if segments[i] == '..' and segments[i-1]:
+ del segments[i-1:i+1]
+ break
+ i = i+1
+ else:
+ break
+ if len(segments) >= 2 and segments[-1] == '..':
+ segments[-2:] = ['']
+ path = string.joinfields(segments, '/')
+ return urlunparse((scheme, netloc, path,
+ params, query, fragment))
+
+test_input = """
+ http://a/b/c/d
+
+ g:h = <URL:g:h>
+ http:g = <URL:http://a/b/c/g>
+ http: = <URL:http://a/b/c/d>
+ g = <URL:http://a/b/c/g>
+ ./g = <URL:http://a/b/c/g>
+ g/ = <URL:http://a/b/c/g/>
+ /g = <URL:http://a/g>
+ //g = <URL:http://g>
+ ?y = <URL:http://a/b/c/d?y>
+ g?y = <URL:http://a/b/c/g?y>
+ g?y/./x = <URL:http://a/b/c/g?y/./x>
+ . = <URL:http://a/b/c/>
+ ./ = <URL:http://a/b/c/>
+ .. = <URL:http://a/b/>
+ ../ = <URL:http://a/b/>
+ ../g = <URL:http://a/b/g>
+ ../.. = <URL:http://a/>
+ ../../g = <URL:http://a/g>
+ ../../../g = <URL:http://a/../g>
+ ./../g = <URL:http://a/b/g>
+ ./g/. = <URL:http://a/b/c/g/>
+ /./g = <URL:http://a/./g>
+ g/./h = <URL:http://a/b/c/g/h>
+ g/../h = <URL:http://a/b/c/h>
+ http:g = <URL:http://a/b/c/g>
+ http: = <URL:http://a/b/c/d>
+"""
+
+def test():
+ import sys
+ base = ''
+ if sys.argv[1:]:
+ fn = sys.argv[1]
+ if fn == '-':
+ fp = sys.stdin
+ else:
+ fp = open(fn)
+ else:
+ import StringIO
+ fp = StringIO.StringIO(test_input)
+ while 1:
+ line = fp.readline()
+ if not line: break
+ words = string.split(line)
+ if not words:
+ continue
+ url = words[0]
+ parts = urlparse(url)
+ print '%-10s : %s' % (url, parts)
+ abs = urljoin(base, url)
+ if not base:
+ base = abs
+ wrapped = '<URL:%s>' % abs
+ print '%-10s = %s' % (url, wrapped)
+ if len(words) == 3 and words[1] == '=':
+ if wrapped != words[2]:
+ print 'EXPECTED', words[2], '!!!!!!!!!!'
+
+if __name__ == '__main__':
+ test()
projects / thirdparty / Python / cpython.git / commitdiff
