X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?p=bup.git;a=blobdiff_plain;f=main.py;h=45a0e8a14ae30b62013d0fe187ff94f0348c35b2;hp=0ac7abc64857133117028602184e6fa17f4ea8f6;hb=refs%2Fheads%2Funused-variable-do_bloom;hpb=2cb406d6d2f11757ce23e8787871bca4f9a1b85f diff --git a/main.py b/main.py index 0ac7abc..45a0e8a 100755 --- a/main.py +++ b/main.py @@ -1,9 +1,8 @@ #!/usr/bin/env python - import sys, os, subprocess, signal, getopt argv = sys.argv -exe = argv[0] +exe = os.path.realpath(argv[0]) exepath = os.path.split(exe)[0] or '.' exeprefix = os.path.split(os.path.abspath(exepath))[0] @@ -13,50 +12,37 @@ if os.path.exists("%s/lib/bup/cmd/." % exeprefix): # eg. /usr/bin/bup means /usr/lib/bup/... is where our libraries are. cmdpath = "%s/lib/bup/cmd" % exeprefix libpath = "%s/lib/bup" % exeprefix + resourcepath = libpath else: # running from the src directory without being installed first cmdpath = os.path.join(exepath, 'cmd') libpath = os.path.join(exepath, 'lib') + resourcepath = libpath sys.path[:0] = [libpath] os.environ['PYTHONPATH'] = libpath + ':' + os.environ.get('PYTHONPATH', '') os.environ['BUP_MAIN_EXE'] = os.path.abspath(exe) +os.environ['BUP_RESOURCE_PATH'] = resourcepath +from bup import helpers from bup.helpers import * +# after running 'bup newliner', the tty_width() ioctl won't work anymore +os.environ['WIDTH'] = str(tty_width()) -def columnate(l, prefix): - l = l[:] - clen = max(len(s) for s in l) - ncols = (78 - len(prefix)) / (clen + 2) - if ncols <= 1: - ncols = 1 - clen = 0 - cols = [] - while len(l) % ncols: - l.append('') - rows = len(l)/ncols - for s in range(0, len(l), rows): - cols.append(l[s:s+rows]) - out = '' - for row in zip(*cols): - out += prefix + ''.join(('%-*s' % (clen+2, s)) for s in row) + '\n' - return out - - -def usage(): - log('Usage: bup [-?|--help] [-d=BUP_DIR|--bup-dir=BUP_DIR] COMMAND [ARGS]' - + '\n\n') +def usage(msg=""): + log('Usage: bup [-?|--help] [-d BUP_DIR] [--debug] [--profile] ' + ' [options...]\n\n') common = dict( ftp = 'Browse backup sets using an ftp-like client', fsck = 'Check backup sets for damage and add redundancy information', fuse = 'Mount your backup sets as a filesystem', help = 'Print detailed help for the given command', index = 'Create or display the index of files to back up', - join = 'Retrieve a file backed up using "bup split"', - ls = 'Browse the files in your backup sets', - midx = 'Index objects to speed up future backups', + on = 'Backup a remote machine to the local one', + restore = 'Extract files from a backup set', save = 'Save files into a backup set (note: run "bup index" first)', - split = 'Split a single file into its own backup set', + tag = 'Tag commits for easier access', + web = 'Launch a web server to examine backup sets', ) log('Common commands:\n') @@ -76,6 +62,8 @@ def usage(): log("See 'bup help COMMAND' for more information on " + "a specific command.\n") + if msg: + log("\n%s\n" % msg) sys.exit(99) @@ -84,22 +72,32 @@ if len(argv) < 2: # Handle global options. try: - global_args, subcmd = getopt.getopt(argv[1:], '?d:', ['help', 'bup-dir=']) + optspec = ['help', 'version', 'debug', 'profile', 'bup-dir='] + global_args, subcmd = getopt.getopt(argv[1:], '?VDd:', optspec) except getopt.GetoptError, ex: - log('error: ' + ex.msg + '\n') - usage() + usage('error: %s' % ex.msg) help_requested = None -dest_dir = None +do_profile = False for opt in global_args: - if opt[0] == '-?' or opt[0] == '--help': + if opt[0] in ['-?', '--help']: help_requested = True - elif opt[0] == '-d' or opt[0] == '--bup-dir': - dest_dir = opt[1] + elif opt[0] in ['-V', '--version']: + subcmd = ['version'] + elif opt[0] in ['-D', '--debug']: + helpers.buglvl += 1 + os.environ['BUP_DEBUG'] = str(helpers.buglvl) + elif opt[0] in ['--profile']: + do_profile = True + elif opt[0] in ['-d', '--bup-dir']: + os.environ['BUP_DIR'] = opt[1] else: - log('error: unexpected option "%s"\n' % opt[0]) - usage() + usage('error: unexpected option "%s"' % opt[0]) + +# Make BUP_DIR absolute, so we aren't affected by chdir (i.e. save -C, etc.). +if 'BUP_DIR' in os.environ: + os.environ['BUP_DIR'] = os.path.abspath(os.environ['BUP_DIR']) if len(subcmd) == 0: if help_requested: @@ -117,22 +115,18 @@ subcmd_name = subcmd[0] if not subcmd_name: usage() -subcmd_env = os.environ -if dest_dir: - subcmd_env.update({"BUP_DIR" : dest_dir}) - def subpath(s): sp = os.path.join(exepath, 'bup-%s' % s) if not os.path.exists(sp): sp = os.path.join(cmdpath, 'bup-%s' % s) return sp -if not os.path.exists(subpath(subcmd_name)): - log('error: unknown command "%s"\n' % subcmd_name) - usage() +subcmd[0] = subpath(subcmd_name) +if not os.path.exists(subcmd[0]): + usage('error: unknown command "%s"' % subcmd_name) already_fixed = atoi(os.environ.get('BUP_FORCE_TTY')) -if subcmd_name in ['ftp', 'help']: +if subcmd_name in ['mux', 'ftp', 'help']: already_fixed = True fix_stdout = not already_fixed and os.isatty(1) fix_stderr = not already_fixed and os.isatty(2) @@ -157,35 +151,46 @@ else: outf = None errf = None +ret = 95 +p = None +forward_signals = True -class SigException(Exception): - def __init__(self, signum): - self.signum = signum - Exception.__init__(self, 'signal %d received' % signum) def handler(signum, frame): - raise SigException(signum) + debug1('\nbup: signal %d received\n' % signum) + if not p or not forward_signals: + return + if signum != signal.SIGTSTP: + os.kill(p.pid, signum) + else: # SIGTSTP: stop the child, then ourselves. + os.kill(p.pid, signal.SIGSTOP) + signal.signal(signal.SIGTSTP, signal.SIG_DFL) + os.kill(os.getpid(), signal.SIGTSTP) + # Back from suspend -- reestablish the handler. + signal.signal(signal.SIGTSTP, handler) + ret = 94 signal.signal(signal.SIGTERM, handler) signal.signal(signal.SIGINT, handler) +signal.signal(signal.SIGTSTP, handler) +signal.signal(signal.SIGCONT, handler) -ret = 95 -p = None try: try: - p = subprocess.Popen([subpath(subcmd_name)] + subcmd[1:], - stdout=outf, stderr=errf, preexec_fn=force_tty) + c = (do_profile and [sys.executable, '-m', 'cProfile'] or []) + subcmd + if not n and not outf and not errf: + # shortcut when no bup-newliner stuff is needed + os.execvp(c[0], c) + else: + p = subprocess.Popen(c, stdout=outf, stderr=errf, + preexec_fn=force_tty) while 1: # if we get a signal while waiting, we have to keep waiting, just # in case our child doesn't die. - try: - ret = p.wait() - break - except SigException, e: - log('\nbup: %s\n' % e) - os.kill(p.pid, e.signum) - ret = 94 + ret = p.wait() + forward_signals = False + break except OSError, e: - log('%s: %s\n' % (subpath(subcmd_name), e)) + log('%s: %s\n' % (subcmd[0], e)) ret = 98 finally: if p and p.poll() == None: