Commit | Line | Data |
---|---|---|
a028c28a | 1 | import signal |
cb87ff89 | 2 | import hashlib |
bde0c540 JR |
3 | import os |
4 | import time | |
74eb7096 JR |
5 | import socket |
6 | ||
8fefa4a3 | 7 | from lxml import etree |
74eb7096 | 8 | from contextlib import closing |
a028c28a | 9 | |
8fefa4a3 | 10 | |
85a9e11c JR |
11 | def line_count(file_path): |
12 | line_count = 0 | |
13 | with open(file_path) as f: | |
14 | for line in f: | |
15 | line_count += 1 | |
16 | return line_count | |
a028c28a JR |
17 | |
18 | ||
cb87ff89 JR |
19 | def sha256_checksum(filename, block_size=65536): |
20 | sha256 = hashlib.sha256() | |
21 | with open(filename, 'rb') as f: | |
22 | for block in iter(lambda: f.read(block_size), b''): | |
23 | sha256.update(block) | |
24 | return sha256.hexdigest() | |
25 | ||
26 | ||
bde0c540 JR |
27 | # TODO: timeout as a parameter or Settings |
28 | # TODO: Custom exception | |
29 | def wait_for_file(path): | |
30 | i = 0 | |
31 | timeout = 60 | |
32 | while not os.path.exists(path): | |
33 | time.sleep(1) | |
34 | i = i + 1 | |
35 | if i > timeout: | |
36 | raise Exception("File still does not exists. Timeout expired") | |
37 | ||
38 | ||
39 | # TODO: find better exception | |
40 | def create_empty_file(path): | |
41 | if os.path.exists(path): | |
42 | raise Exception("Path already exist") | |
43 | open(path, 'w').close() | |
44 | ||
45 | ||
a028c28a JR |
46 | def __dummy_sigusr1_handler(): |
47 | pass | |
48 | ||
49 | ||
50 | def sessiond_spawn(runtime): | |
74eb7096 | 51 | agent_port = find_free_port() |
29cf55b3 | 52 | previous_handler = signal.signal(signal.SIGUSR1, __dummy_sigusr1_handler) |
74eb7096 | 53 | sessiond = runtime.spawn_subprocess("lttng-sessiond -vvv -S --agent-tcp-port {}".format(agent_port)) |
29cf55b3 JR |
54 | signal.sigtimedwait({signal.SIGUSR1}, 60) |
55 | previous_handler = signal.signal(signal.SIGUSR1, previous_handler) | |
56 | return sessiond | |
57 | ||
58 | ||
74eb7096 JR |
59 | def find_free_port(): |
60 | # There is no guarantee that the port will be free at runtime but should be | |
61 | # good enough | |
62 | with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as s: | |
63 | s.bind(('', 0)) | |
64 | return s.getsockname()[1] | |
29cf55b3 | 65 | |
f4711e68 | 66 | |
8fefa4a3 JR |
67 | def file_contains(file_path, list_of_string): |
68 | with open(file_path, 'r') as f: | |
69 | for line in f: | |
f4711e68 JR |
70 | for s in list_of_string: |
71 | if s in line: | |
72 | return True | |
2094d672 JR |
73 | |
74 | ||
75 | def find_dir(root, name): | |
76 | """ | |
77 | Returns the absolute path or None. | |
78 | """ | |
79 | abs_path = None | |
80 | for base, dirs, files in os.walk(root): | |
81 | for tmp in dirs: | |
2094d672 JR |
82 | if tmp.endswith(name): |
83 | abs_path = os.path.abspath(os.path.join(base, tmp)) | |
84 | return abs_path | |
8fefa4a3 JR |
85 | |
86 | ||
816f8cc1 JR |
87 | def find_file(root, name): |
88 | """ | |
89 | Returns the absolute path or None. | |
90 | """ | |
816f8cc1 JR |
91 | abs_path = None |
92 | for base, dirs, files in os.walk(root): | |
93 | for tmp in files: | |
94 | if tmp.endswith(name): | |
95 | abs_path = os.path.abspath(os.path.join(base, tmp)) | |
816f8cc1 JR |
96 | return abs_path |
97 | ||
98 | ||
99 | def validate(xml_path, xsd_path): | |
100 | ||
101 | xmlschema_doc = etree.parse(xsd_path) | |
102 | xmlschema = etree.XMLSchema(xmlschema_doc) | |
103 | ||
104 | xml_doc = etree.parse(xml_path) | |
105 | result = xmlschema.validate(xml_doc) | |
106 | ||
107 | return result | |
108 | ||
8fefa4a3 JR |
109 | def xpath_query(xml_file, xpath): |
110 | """ | |
111 | Return a list of xml node corresponding to the xpath. The list can be of lenght | |
112 | zero. | |
113 | """ | |
114 | with open(xml_file, 'r') as f: | |
115 | tree = etree.parse(f) | |
116 | root = tree.getroot() | |
117 | # Remove all namespace | |
118 | # https://stackoverflow.com/questions/18159221/remove-namespace-and-prefix-from-xml-in-python-using-lxml | |
119 | for elem in root.getiterator(): | |
120 | if not hasattr(elem.tag, 'find'): | |
121 | continue | |
122 | i = elem.tag.find('}') | |
123 | if i >= 0: | |
124 | elem.tag = elem.tag[i+1:] | |
125 | ||
126 | return root.xpath(xpath) |