GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/util/uuid.cc
Date: 2025-03-09 02:34:28
Exec Total Coverage
Lines: 50 54 92.6%
Branches: 30 50 60.0%
Line Branch Exec Source
1 /**
2 * This file is part of the CernVM File System.
3 *
4 * UUID generation and caching.
5 */
6
7 #define __STDC_FORMAT_MACROS
8
9 #include "util/uuid.h"
10
11 #include <cassert>
12 #include <cstdio>
13 #include <cstring>
14
15 #include "util/pointer.h"
16 #include "util/posix.h"
17 #include "util/string.h"
18
19 using namespace std; // NOLINT
20
21 namespace cvmfs {
22
23 100148 Uuid *Uuid::Create(const string &store_path) {
24
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 100148 UniquePtr<Uuid> uuid(new Uuid());
25
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 100148 if (store_path == "") {
26
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 100078 uuid->MkUuid();
27 100078 return uuid.Release();
28 }
29
30
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 70 FILE *f = fopen(store_path.c_str(), "r");
31
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 70 if (f == NULL) {
32 // Create and store
33
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 58 uuid->MkUuid();
34
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 58 string uuid_str = uuid->uuid();
35 58 string path_tmp;
36
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 58 FILE *f_tmp = CreateTempFile(store_path + "_tmp",
37 S_IWUSR | S_IWGRP | S_IRUSR | S_IRGRP | S_IROTH, "w", &path_tmp);
38
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 58 if (!f_tmp)
39 1 return NULL;
40
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 57 int written = fprintf(f_tmp, "%s\n", uuid_str.c_str());
41
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 57 fclose(f_tmp);
42
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 57 if (written != static_cast<int>(uuid_str.length() + 1)) {
43 ✗ unlink(path_tmp.c_str());
44 ✗ return NULL;
45 }
46
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 57 if (rename(path_tmp.c_str(), store_path.c_str()) != 0) {
47 ✗ unlink(path_tmp.c_str());
48 ✗ return NULL;
49 }
50 57 return uuid.Release();
51 58 }
52
53 // Read from cached file
54
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 12 bool retval = GetLineFile(f, &uuid->uuid_);
55
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 12 fclose(f);
56
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 12 if (!retval)
57 2 return NULL;
58 10 int nitems = sscanf(uuid->uuid_.c_str(),
59 "%08" SCNx32 "-%04" SCNx16 "-%04" SCNx16 "-%04" SCNx16 "-%08" SCNx32 "%04"
60 SCNx16,
61 10 &uuid->uuid_presentation_.split.a, &uuid->uuid_presentation_.split.b,
62 10 &uuid->uuid_presentation_.split.c, &uuid->uuid_presentation_.split.d,
63 10 &uuid->uuid_presentation_.split.e1, &uuid->uuid_presentation_.split.e2);
64
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 10 if (nitems != 6)
65 1 return NULL;
66
67 9 return uuid.Release();
68 100148 }
69
70
71 2 string Uuid::CreateOneTime() {
72
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 2 Uuid uuid;
73
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 2 uuid.MkUuid();
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 4 return uuid.uuid_;
75 2 }
76
77
78 /**
79 * Creates a new UUID in canonical string representation and overwrites uuid_
80 * with the result.
81 */
82 100138 void Uuid::MkUuid() {
83 uuid_t new_uuid;
84 100138 uuid_generate(new_uuid);
85 assert(sizeof(new_uuid) == 16);
86 100138 memcpy(uuid_presentation_.uuid, new_uuid, sizeof(uuid_presentation_.uuid));
87 // Canonical UUID format, including trailing \0
88 100138 unsigned uuid_len = 8+1+4+1+4+1+4+1+12+1;
89 100138 char uuid_cstr[uuid_len];
90 100138 snprintf(uuid_cstr, uuid_len, "%08x-%04x-%04x-%04x-%08x%04x",
91 100138 uuid_presentation_.split.a, uuid_presentation_.split.b,
92 100138 uuid_presentation_.split.c, uuid_presentation_.split.d,
93 100138 uuid_presentation_.split.e1, uuid_presentation_.split.e2);
94
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 100138 uuid_ = string(uuid_cstr);
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 200276 }
96
97
98 100150 Uuid::Uuid() {
99 100150 memset(&uuid_presentation_, 0, sizeof(uuid_presentation_));
100 100150 }
101
102 } // namespace cvmfs
103