import types, os, sys, isys, select, string def getArch (): arch = os.uname ()[4] if (len (arch) == 4 and arch[0] == 'i' and arch[2:4] == "86"): arch = "i386" if arch == "sparc64": arch = "sparc" return arch def getfd(filespec, readOnly = 0): if type(filespec) == types.IntType: return filespec if filespec == None: filespec = "/dev/null" flags = os.O_RDWR | os.O_CREAT if (readOnly): flags = os.O_RDONLY return os.open(filespec, flags) def execWithRedirect(command, argv, stdin = 0, stdout = 1, stderr = 2, searchPath = 0, root = '/'): stdin = getfd(stdin) stdout = getfd(stdout) stderr = getfd(stderr) if not os.access (root + command, os.X_OK): raise RuntimeError, command + " can not be run" childpid = os.fork() if (not childpid): if (root != '/'): isys.chroot (root) if stdin != 0: os.dup2(stdin, 0) os.close(stdin) if stdout != 1: os.dup2(stdout, 1) os.close(stdout) if stderr != 2: os.dup2(stderr, 2) os.close(stderr) if (searchPath): os.execvp(command, argv) else: os.execv(command, argv) sys.exit(1) (pid, status) = os.waitpid(childpid, 0) return status def execWithCapture(command, argv, searchPath = 0, root = '/', stdin = 0): if not os.access (root + command, os.X_OK): raise RuntimeError, command + " can not be run" (read, write) = os.pipe() childpid = os.fork() if (not childpid): if (root != '/'): isys.chroot (root) os.dup2(write, 1) if stdin: os.dup2(stdin, 0) os.close(stdin) if (searchPath): os.execvp(command, argv) else: os.execv(command, argv) sys.exit(1) os.close(write) rc = "" s = "1" while (s): select.select([read], [], []) s = os.read(read, 1000) rc = rc + s os.close(read) os.waitpid(childpid, 0) return rc def copyFile(source, to): f = os.open(source, os.O_RDONLY) t = os.open(to, os.O_RDWR | os.O_TRUNC | os.O_CREAT) count = os.read(f, 16384) while (count): os.write(t, count) count = os.read(f, 16384) os.close(f) os.close(t) def memInstalled(): f = open("/proc/meminfo", "r") mem = f.readlines()[1] del f fields = string.split(mem) return int(fields[1]) / 1024