3 import sys, os, subprocess, signal, getopt
7 exepath = os.path.split(exe)[0] or '.'
9 # fix the PYTHONPATH to include our lib dir
10 libpath = os.path.join(exepath, 'lib')
11 cmdpath = os.path.join(exepath, 'cmd')
12 sys.path[:0] = [libpath]
13 os.environ['PYTHONPATH'] = libpath + ':' + os.environ.get('PYTHONPATH', '')
14 os.environ['BUP_MAIN_EXE'] = os.path.abspath(exe)
16 from bup.helpers import *
19 def columnate(l, prefix):
21 clen = max(len(s) for s in l)
22 ncols = (78 - len(prefix)) / (clen + 2)
30 for s in range(0, len(l), rows):
31 cols.append(l[s:s+rows])
33 for row in zip(*cols):
34 out += prefix + ''.join(('%-*s' % (clen+2, s)) for s in row) + '\n'
39 log('Usage: bup [-?|--help] [-d=BUP_DIR|--bup-dir=BUP_DIR] COMMAND [ARGS]'
42 ftp = 'Browse backup sets using an ftp-like client',
43 fsck = 'Check backup sets for damage and add redundancy information',
44 fuse = 'Mount your backup sets as a filesystem',
45 help = 'Print detailed help for the given command',
46 index = 'Create or display the index of files to back up',
47 join = 'Retrieve a file backed up using "bup split"',
48 ls = 'Browse the files in your backup sets',
49 midx = 'Index objects to speed up future backups',
50 save = 'Save files into a backup set (note: run "bup index" first)',
51 split = 'Split a single file into its own backup set',
54 log('Common commands:\n')
55 for cmd,synopsis in sorted(common.items()):
56 log(' %-10s %s\n' % (cmd, synopsis))
59 log('Other available commands:\n')
61 for c in sorted(os.listdir(cmdpath) + os.listdir(exepath)):
62 if c.startswith('bup-') and c.find('.') < 0:
64 if cname not in common:
66 log(columnate(cmds, ' '))
69 log("See 'bup help COMMAND' for more information on " +
70 "a specific command.\n")
77 # Handle global options.
79 global_args, subcmd = getopt.getopt(argv[1:], '?d:', ['help', 'bup-dir='])
80 except getopt.GetoptError, ex:
81 log('error: ' + ex.msg + '\n')
87 for opt in global_args:
88 if opt[0] == '-?' or opt[0] == '--help':
90 elif opt[0] == '-d' or opt[0] == '--bup-dir':
93 log('error: unexpected option "%s"\n' % opt[0])
102 if help_requested and subcmd[0] != 'help':
103 subcmd = ['help'] + subcmd
105 if len(subcmd) > 1 and subcmd[1] == '--help' and subcmd[0] != 'help':
106 subcmd = ['help', subcmd[0]] + subcmd[2:]
108 subcmd_name = subcmd[0]
112 subcmd_env = os.environ
114 subcmd_env.update({"BUP_DIR" : dest_dir})
117 sp = os.path.join(exepath, 'bup-%s' % s)
118 if not os.path.exists(sp):
119 sp = os.path.join(cmdpath, 'bup-%s' % s)
122 if not os.path.exists(subpath(subcmd_name)):
123 log('error: unknown command "%s"\n' % subcmd_name)
126 already_fixed = atoi(os.environ.get('BUP_FORCE_TTY'))
127 if subcmd_name in ['ftp', 'help']:
129 fix_stdout = not already_fixed and os.isatty(1)
130 fix_stderr = not already_fixed and os.isatty(2)
133 if fix_stdout or fix_stderr:
134 amt = (fix_stdout and 1 or 0) + (fix_stderr and 2 or 0)
135 os.environ['BUP_FORCE_TTY'] = str(amt)
136 os.setsid() # make sure ctrl-c is sent just to us, not to child too
138 if fix_stdout or fix_stderr:
139 realf = fix_stderr and 2 or 1
140 drealf = os.dup(realf) # Popen goes crazy with stdout=2
141 n = subprocess.Popen([subpath('newliner')],
142 stdin=subprocess.PIPE, stdout=drealf,
143 close_fds=True, preexec_fn=force_tty)
145 outf = fix_stdout and n.stdin.fileno() or None
146 errf = fix_stderr and n.stdin.fileno() or None
153 class SigException(Exception):
154 def __init__(self, signum):
156 Exception.__init__(self, 'signal %d received' % signum)
157 def handler(signum, frame):
158 raise SigException(signum)
160 signal.signal(signal.SIGTERM, handler)
161 signal.signal(signal.SIGINT, handler)
167 p = subprocess.Popen([subpath(subcmd_name)] + subcmd[1:],
168 stdout=outf, stderr=errf, preexec_fn=force_tty)
170 # if we get a signal while waiting, we have to keep waiting, just
171 # in case our child doesn't die.
175 except SigException, e:
176 log('\nbup: %s\n' % e)
177 os.kill(p.pid, e.signum)
180 log('%s: %s\n' % (subpath(subcmd_name), e))
183 if p and p.poll() == None:
184 os.kill(p.pid, signal.SIGTERM)