+++ /dev/null
-"""distutils.spawn
-
-Provides the 'spawn()' function, a front-end to various platform-
-specific functions for launching another program in a sub-process.
-Also provides the 'find_executable()' to search the path for a given
-executable name.
-"""
-
-# This module should be kept compatible with Python 1.5.2.
-
-__revision__ = "$Id$"
-
-import sys, os, string
-from distutils.errors import *
-from distutils import log
-
-def spawn (cmd,
- search_path=1,
- verbose=0,
- dry_run=0):
-
- """Run another program, specified as a command list 'cmd', in a new
- process. 'cmd' is just the argument list for the new process, ie.
- cmd[0] is the program to run and cmd[1:] are the rest of its arguments.
- There is no way to run a program with a name different from that of its
- executable.
-
- If 'search_path' is true (the default), the system's executable
- search path will be used to find the program; otherwise, cmd[0]
- must be the exact path to the executable. If 'dry_run' is true,
- the command will not actually be run.
-
- Raise DistutilsExecError if running the program fails in any way; just
- return on success.
- """
- if os.name == 'posix':
- _spawn_posix(cmd, search_path, dry_run=dry_run)
- elif os.name == 'nt':
- _spawn_nt(cmd, search_path, dry_run=dry_run)
- elif os.name == 'os2':
- _spawn_os2(cmd, search_path, dry_run=dry_run)
- else:
- raise DistutilsPlatformError, \
- "don't know how to spawn programs on platform '%s'" % os.name
-
-# spawn ()
-
-
-def _nt_quote_args (args):
- """Quote command-line arguments for DOS/Windows conventions: just
- wraps every argument which contains blanks in double quotes, and
- returns a new argument list.
- """
-
- # XXX this doesn't seem very robust to me -- but if the Windows guys
- # say it'll work, I guess I'll have to accept it. (What if an arg
- # contains quotes? What other magic characters, other than spaces,
- # have to be escaped? Is there an escaping mechanism other than
- # quoting?)
-
- for i in range(len(args)):
- if string.find(args[i], ' ') != -1:
- args[i] = '"%s"' % args[i]
- return args
-
-def _spawn_nt (cmd,
- search_path=1,
- verbose=0,
- dry_run=0):
-
- executable = cmd[0]
- cmd = _nt_quote_args(cmd)
- if search_path:
- # either we find one or it stays the same
- executable = find_executable(executable) or executable
- log.info(string.join([executable] + cmd[1:], ' '))
- if not dry_run:
- # spawn for NT requires a full path to the .exe
- try:
- rc = os.spawnv(os.P_WAIT, executable, cmd)
- except OSError, exc:
- # this seems to happen when the command isn't found
- raise DistutilsExecError, \
- "command '%s' failed: %s" % (cmd[0], exc[-1])
- if rc != 0:
- # and this reflects the command running but failing
- raise DistutilsExecError, \
- "command '%s' failed with exit status %d" % (cmd[0], rc)
-
-
-def _spawn_os2 (cmd,
- search_path=1,
- verbose=0,
- dry_run=0):
-
- executable = cmd[0]
- #cmd = _nt_quote_args(cmd)
- if search_path:
- # either we find one or it stays the same
- executable = find_executable(executable) or executable
- log.info(string.join([executable] + cmd[1:], ' '))
- if not dry_run:
- # spawnv for OS/2 EMX requires a full path to the .exe
- try:
- rc = os.spawnv(os.P_WAIT, executable, cmd)
- except OSError, exc:
- # this seems to happen when the command isn't found
- raise DistutilsExecError, \
- "command '%s' failed: %s" % (cmd[0], exc[-1])
- if rc != 0:
- # and this reflects the command running but failing
- print "command '%s' failed with exit status %d" % (cmd[0], rc)
- raise DistutilsExecError, \
- "command '%s' failed with exit status %d" % (cmd[0], rc)
-
-
-def _spawn_posix (cmd,
- search_path=1,
- verbose=0,
- dry_run=0):
-
- log.info(string.join(cmd, ' '))
- if dry_run:
- return
- exec_fn = search_path and os.execvp or os.execv
-
- pid = os.fork()
-
- if pid == 0: # in the child
- try:
- #print "cmd[0] =", cmd[0]
- #print "cmd =", cmd
- exec_fn(cmd[0], cmd)
- except OSError, e:
- sys.stderr.write("unable to execute %s: %s\n" %
- (cmd[0], e.strerror))
- os._exit(1)
-
- sys.stderr.write("unable to execute %s for unknown reasons" % cmd[0])
- os._exit(1)
-
-
- else: # in the parent
- # Loop until the child either exits or is terminated by a signal
- # (ie. keep waiting if it's merely stopped)
- while 1:
- (pid, status) = os.waitpid(pid, 0)
- if os.WIFSIGNALED(status):
- raise DistutilsExecError, \
- "command '%s' terminated by signal %d" % \
- (cmd[0], os.WTERMSIG(status))
-
- elif os.WIFEXITED(status):
- exit_status = os.WEXITSTATUS(status)
- if exit_status == 0:
- return # hey, it succeeded!
- else:
- raise DistutilsExecError, \
- "command '%s' failed with exit status %d" % \
- (cmd[0], exit_status)
-
- elif os.WIFSTOPPED(status):
- continue
-
- else:
- raise DistutilsExecError, \
- "unknown error executing '%s': termination status %d" % \
- (cmd[0], status)
-# _spawn_posix ()
-
-
-def find_executable(executable, path=None):
- """Try to find 'executable' in the directories listed in 'path' (a
- string listing directories separated by 'os.pathsep'; defaults to
- os.environ['PATH']). Returns the complete filename or None if not
- found.
- """
- if path is None:
- path = os.environ['PATH']
- paths = string.split(path, os.pathsep)
- (base, ext) = os.path.splitext(executable)
- if (sys.platform == 'win32' or os.name == 'os2') and (ext != '.exe'):
- executable = executable + '.exe'
- if not os.path.isfile(executable):
- for p in paths:
- f = os.path.join(p, executable)
- if os.path.isfile(f):
- # the file exists, we have a shot at spawn working
- return f
- return None
- else:
- return executable
-
-# find_executable()
projects / wxWidgets.git / blobdiff