#!/usr/bin/env python
-import sys, os, subprocess
+import sys, os, subprocess, signal, getopt
argv = sys.argv
exe = argv[0]
exepath = os.path.split(exe)[0] or '.'
+exeprefix = os.path.split(os.path.abspath(exepath))[0]
# fix the PYTHONPATH to include our lib dir
-libpath = os.path.join(exepath, 'lib')
-cmdpath = os.path.join(exepath, 'cmd')
+if os.path.exists("%s/lib/bup/cmd/." % exeprefix):
+ # installed binary in /.../bin.
+ # 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 usage():
- log('Usage: bup <command> <options...>\n\n')
- log('Available commands:\n')
+ log('Usage: bup [-?|--help] [-d BUP_DIR] [--debug] '
+ '<command> [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',
+ 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)',
+ web = 'Launch a web server to examine backup sets',
+ )
+
+ log('Common commands:\n')
+ for cmd,synopsis in sorted(common.items()):
+ log(' %-10s %s\n' % (cmd, synopsis))
+ log('\n')
+
+ log('Other available commands:\n')
+ cmds = []
for c in sorted(os.listdir(cmdpath) + os.listdir(exepath)):
if c.startswith('bup-') and c.find('.') < 0:
- log('\t%s\n' % c[4:])
- log("\nSee 'bup help <command>' for more information on " +
+ cname = c[4:]
+ if cname not in common:
+ cmds.append(c[4:])
+ log(columnate(cmds, ' '))
+ log('\n')
+
+ log("See 'bup help COMMAND' for more information on " +
"a specific command.\n")
sys.exit(99)
-if len(argv) < 2 or not argv[1] or argv[1][0] == '-':
+
+if len(argv) < 2:
+ usage()
+
+# Handle global options.
+try:
+ global_args, subcmd = getopt.getopt(argv[1:], '?VDd:',
+ ['help', 'version', 'debug', 'bup-dir='])
+except getopt.GetoptError, ex:
+ log('error: ' + ex.msg + '\n')
+ usage()
+
+help_requested = None
+dest_dir = None
+
+for opt in global_args:
+ if opt[0] in ['-?', '--help']:
+ help_requested = True
+ 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 ['-d', '--bup-dir']:
+ dest_dir = opt[1]
+ else:
+ log('error: unexpected option "%s"\n' % opt[0])
+ usage()
+
+if len(subcmd) == 0:
+ if help_requested:
+ subcmd = ['help']
+ else:
+ usage()
+
+if help_requested and subcmd[0] != 'help':
+ subcmd = ['help'] + subcmd
+
+if len(subcmd) > 1 and subcmd[1] == '--help' and subcmd[0] != 'help':
+ subcmd = ['help', subcmd[0]] + subcmd[2:]
+
+subcmd_name = subcmd[0]
+if not subcmd_name:
usage()
-subcmd = argv[1]
+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)
sp = os.path.join(cmdpath, 'bup-%s' % s)
return sp
-if not os.path.exists(subpath(subcmd)):
- log('error: unknown command "%s"\n' % subcmd)
+if not os.path.exists(subpath(subcmd_name)):
+ log('error: unknown command "%s"\n' % subcmd_name)
usage()
-
already_fixed = atoi(os.environ.get('BUP_FORCE_TTY'))
-if subcmd in ['ftp', 'help']:
+if subcmd_name in ['ftp', 'help']:
already_fixed = True
fix_stdout = not already_fixed and os.isatty(1)
fix_stderr = not already_fixed and os.isatty(2)
def force_tty():
if fix_stdout or fix_stderr:
- os.environ['BUP_FORCE_TTY'] = '1'
+ amt = (fix_stdout and 1 or 0) + (fix_stderr and 2 or 0)
+ os.environ['BUP_FORCE_TTY'] = str(amt)
+ os.setsid() # make sure ctrl-c is sent just to us, not to child too
if fix_stdout or fix_stderr:
realf = fix_stderr and 2 or 1
+ drealf = os.dup(realf) # Popen goes crazy with stdout=2
n = subprocess.Popen([subpath('newliner')],
- stdin=subprocess.PIPE, stdout=os.dup(realf),
+ stdin=subprocess.PIPE, stdout=drealf,
close_fds=True, preexec_fn=force_tty)
- outf = fix_stdout and n.stdin.fileno() or 1
- errf = fix_stderr and n.stdin.fileno() or 2
+ os.close(drealf)
+ outf = fix_stdout and n.stdin.fileno() or None
+ errf = fix_stderr and n.stdin.fileno() or None
else:
n = None
- outf = 1
- errf = 2
+ outf = None
+ errf = None
+
+
+class SigException(Exception):
+ def __init__(self, signum):
+ self.signum = signum
+ Exception.__init__(self, 'signal %d received' % signum)
+def handler(signum, frame):
+ raise SigException(signum)
+
+signal.signal(signal.SIGTERM, handler)
+signal.signal(signal.SIGINT, handler)
ret = 95
+p = None
try:
try:
- p = subprocess.Popen([subpath(subcmd)] + argv[2:],
+ p = subprocess.Popen([subpath(subcmd_name)] + subcmd[1:],
stdout=outf, stderr=errf, preexec_fn=force_tty)
- ret = p.wait()
+ 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
except OSError, e:
- log('%s: %s\n' % (subpath(subcmd), e))
+ log('%s: %s\n' % (subpath(subcmd_name), e))
ret = 98
- except KeyboardInterrupt, e:
- ret = 94
finally:
+ if p and p.poll() == None:
+ os.kill(p.pid, signal.SIGTERM)
+ p.wait()
if n:
n.stdin.close()
try: