def ls_cmd(dir_list): # we want to print the dirname if we are ls'ing multiple dirs print_dir = 0 if len(dir_list) > 1: print_dir = 1 for dir in dir_list: try: lindfd = lind_test_server.open_syscall(dir, lind_test_server.O_RDONLY, lind_test_server.S_IRWXU) #first open the file except lind_test_server.SyscallError, e: print "Could not open the local file. Error: %s" % e return -1 getdents_size = 20 #the number of nodes to check per getdents ls_list = [] #the list that will hold all the subfiles prev_ls_list_count = -1#keeps track of the list count during the previous iteration #while there are still files to look at, add them to the list. Once the list size is the same for 2 iterations in a row, we know there is nothing left to look at! while not len(ls_list) == prev_ls_list_count: try: prev_ls_list_count = len(ls_list)#update the count ls_list.extend(lind_test_server.getdents_syscall(lindfd, getdents_size))#add the current group of <getdents_size> files to the list of all files except lind_test_server.SyscallError, e: print "getdents failed. Error: %s" % e
def readdir(self, path, offset):
log("readdir", path, offset)
lindfd = lind.open_syscall(path, lind.O_RDONLY, lind.S_IRWXU)
dents = map(lambda x: x[1], lind.getdents_syscall(lindfd, 999))
assert len(dents) < 998, "Readdir max was hit..."
for e in dents:
yield fuse.Direntry(e)
def readdir(self, path, offset):
log("readdir", path, offset)
lindfd = lind.open_syscall(path, lind.O_RDONLY, lind.S_IRWXU)
dents = map(lambda x: x[1], lind.getdents_syscall(lindfd, 999))
assert len(dents) < 998, "Readdir max was hit..."
for e in dents:
yield fuse.Direntry(e)
def _find_all_paths_recursively(startingpath):
# helper for list_all_lind_paths. It recursively looks at all child dirs
knownitems = []
# I need to open the dir to use getdents...
dirfd = lind_test_server.open_syscall(startingpath,0,0)
# build a list of all dents. These have an odd format:
# [(inode, filename, d_type (DT_DIR, DR_REG, etc.), length of entry), ...]
# We only care about the filename and d_type.
mydentslist = []
# Note: the length parameter is odd, it's related to data structure space, so
# it doesn't map to python cleanly. So long as it's > the largest possible
# entry size, this code should work though.
thesedents = lind_test_server.getdents_syscall(dirfd,10000)
while thesedents:
mydentslist += thesedents
thesedents = lind_test_server.getdents_syscall(dirfd,10000)
lind_test_server.close_syscall(dirfd)
# to make the output correct, if the dir is '/', don't print it.
if startingpath == '/':
startingpath = ''
for dent in mydentslist:
# ignore '.' and '..' because they aren't interesting and we don't want
# to loop forever.
if dent[1]=='.' or dent[1]=='..':
continue
thisitem = (dent[0], startingpath+'/'+dent[1])
# add it...
knownitems.append(thisitem)
print thisitem
# if it's a directory, recurse...
if dent[2]==DT_DIR:
knownitems = knownitems + _find_all_paths_recursively(thisitem[1])
return knownitems
def deltree_lind(dirname):
# took part of the code from _find_all_paths_recursively method below.
# It recursively looks at all child dirs
# I need to open the dir to use getdents...
dirfd = lind_test_server.open_syscall(dirname,0,0)
# build a list of all dents. These have an odd format:
# [(inode, filename, d_type (DT_DIR, DR_REG, etc.), length of entry), ...]
# We only care about the filename and d_type.
mydentslist = []
# Note: the length parameter is odd, it's related to data structure space, so
# it doesn't map to python cleanly. So long as it's > the largest possible
# entry size, this code should work though.
thesedents = lind_test_server.getdents_syscall(dirfd,10000)
while thesedents:
mydentslist += thesedents
thesedents = lind_test_server.getdents_syscall(dirfd,10000)
lind_test_server.close_syscall(dirfd)
for dent in mydentslist:
# ignore '.' and '..' because they aren't interesting and we don't want
# to loop forever.
if dent[1]=='.' or dent[1]=='..':
continue
thisitem = (dent[0], dirname+'/'+dent[1])
print "deleting",thisitem[1]
# if it's a directory, recurse...
if dent[2]==DT_DIR:
deltree_lind(thisitem[1])
else:
lind_test_server.unlink_syscall(thisitem[1])
lind_test_server.rmdir_syscall(dirname)
return
from lind_fs_constants import *
lind_test_server._blank_fs_init()
# Let's add a few directories to the system and see if it works...
lind_test_server.mkdir_syscall('/bar',S_IRWXA)
lind_test_server.mkdir_syscall('/bar/baz',S_IRWXA)
lind_test_server.mkdir_syscall('/bar/bap',0)
# Create a new file...
fd = lind_test_server.open_syscall('/bar/bam',O_CREAT,0)
lind_test_server.close_syscall(fd)
# Read the root directory...
rootfd = lind_test_server.open_syscall('/',0,0)
val = lind_test_server.getdents_syscall(rootfd, 100)
assert (val==[(3, 'bar', DT_DIR, 24), (1, '..', DT_DIR, 24),\
(1, '.', DT_DIR, 24)]), "Found: %s"%(str(val))
# Read the /bar directory...
barfd = lind_test_server.open_syscall('/bar',0,0)
# The buffer size is given small, only few entries are read.
val = lind_test_server.getdents_syscall(barfd, 80)
assert (val == [(6, 'bam', DT_REG, 24), (4, 'baz', DT_DIR, 24),\
(5, 'bap', DT_DIR, 24)]), "Found: %s"%(str(val))
# Again call on the same FD, should continue parsing the /bar directory.
val = lind_test_server.getdents_syscall(barfd, 80)
assert (val == [(1, '..', DT_DIR, 24), (3, '.', DT_DIR, 24)]),\
"Found: %s"%(str(val))
