On 30 August 1999, To python-dev@python.org said:
The module as it's currently in the Distutils code is attached. Let me know what you think...
New definition of "attached": I'll just reply to my own message with the code I meant to attach. D'oh! ------------------------------------------------------------------------ """distutils.spawn Provides the 'spawn()' function, a front-end to various platform- specific functions for launching another program in a sub-process.""" # created 1999/07/24, Greg Ward __rcsid__ = "$Id: spawn.py,v 1.2 1999/08/29 18:20:56 gward Exp $" import sys, os, string from distutils.errors import * 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 'verbose' is true, a one-line summary of the command will be printed before it is run. 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, verbose, dry_run) elif os.name in ( 'nt', 'windows' ): # ??? _spawn_nt (cmd, search_path, verbose, dry_run) else: raise DistutilsPlatformError, \ "don't know how to spawn programs on platform '%s'" % os.name # spawn () def _spawn_nt ( cmd, search_path=1, verbose=0, dry_run=0): import string executable = cmd[0] if search_path: paths = string.split( os.environ['PATH'], os.pathsep) base,ext = os.path.splitext(executable) if (ext != '.exe'): executable = executable + '.exe' if not os.path.isfile(executable): paths.reverse() # go over the paths and keep the last one 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 executable = f if verbose: print string.join ( [executable] + cmd[1:], ' ') if not dry_run: # spawn for NT requires a full path to the .exe rc = os.spawnv (os.P_WAIT, executable, cmd) if rc != 0: raise DistutilsExecError("command failed: %d" % rc) def _spawn_posix (cmd, search_path=1, verbose=0, dry_run=0): if verbose: print 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 () ------------------------------------------------------------------------ -- Greg Ward - software developer gward@cnri.reston.va.us Corporation for National Research Initiatives 1895 Preston White Drive voice: +1-703-620-8990 Reston, Virginia, USA 20191-5434 fax: +1-703-620-0913