GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/path_filters/dirtab.cc
Date: 2026-01-18 02:35:49
Exec Total Coverage
Lines: 87 95 91.6%
Branches: 68 92 73.9%
Line Branch Exec Source
1 /**
2 * This file is part of the CernVM File System.
3 */
4
5 #include "dirtab.h"
6
7 #include <cassert>
8 #include <cerrno>
9 #include <cstdio>
10 #include <cstdlib>
11
12 #include "util/logging.h"
13 #include "util/posix.h"
14 #include "util/string.h"
15
16 namespace catalog {
17
18 716 Dirtab::Dirtab() : valid_(true) { }
19
20
21 3 bool Dirtab::Open(const std::string &dirtab_path) {
22
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 3 if (!FileExists(dirtab_path)) {
23 ✗ LogCvmfs(kLogCatalog, kLogStderr, "Cannot find dirtab at '%s'",
24 dirtab_path.c_str());
25 ✗ valid_ = false;
26 ✗ return valid_;
27 }
28
29 3 FILE *dirtab_file = fopen(dirtab_path.c_str(), "r");
30
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 3 if (dirtab_file == NULL) {
31 ✗ LogCvmfs(kLogCatalog, kLogStderr,
32 "Cannot open dirtab for reading at '%s' "
33 "(errno: %d)",
34 ✗ dirtab_path.c_str(), errno);
35 ✗ valid_ = false;
36 ✗ return valid_;
37 }
38
39 3 valid_ = Parse(dirtab_file);
40 3 fclose(dirtab_file);
41 3 return valid_;
42 }
43
44 704 bool Dirtab::Parse(const std::string &dirtab) {
45 704 valid_ = true;
46 704 off_t line_offset = 0;
47
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 3838 while (line_offset < static_cast<off_t>(dirtab.size())) {
48 6268 const std::string line = GetLineMem(dirtab.c_str() + line_offset,
49
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 3134 dirtab.size() - line_offset);
50 3134 line_offset += line.size() + 1; // +1 == skipped \n
51
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 3134 if (!ParseLine(line)) {
52 98 valid_ = false;
53 }
54 3134 }
55
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 704 valid_ = valid_ && CheckRuleValidity();
56 704 return valid_;
57 }
58
59
60 6 bool Dirtab::Parse(FILE *dirtab_file) {
61 6 valid_ = true;
62 6 std::string line;
63
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 12 while (GetLineFile(dirtab_file, &line)) {
64
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 6 if (!ParseLine(line)) {
65 ✗ valid_ = false;
66 }
67 }
68
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 6 valid_ = valid_ && CheckRuleValidity();
69 6 return valid_;
70 6 }
71
72
73 3140 bool Dirtab::ParseLine(const std::string &line) {
74 // line parsing is done using std::string iterators. Each parsing method ex-
75 // pects an iterator and the end iterator. While parsing itr is constantly
76 // incremented to walk through the given .cvmfsdirtab line.
77 3140 std::string::const_iterator itr = line.begin();
78 3140 const std::string::const_iterator iend = line.end();
79 3140 bool negation = false;
80
81 // parse preamble
82 3140 SkipWhitespace(iend, &itr);
83
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 3140 if (*itr == Dirtab::kCommentMarker) {
84 869 return true;
85
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 2271 } else if (*itr == Dirtab::kNegationMarker) {
86 912 negation = true;
87 912 ++itr;
88 912 SkipWhitespace(iend, &itr);
89 }
90
91 // extract and parse pathspec
92
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 4542 const std::string pathspec_str(Trim(std::string(itr, iend)));
93
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 2271 return this->ParsePathspec(pathspec_str, negation);
94 2271 }
95
96 2301 bool Dirtab::ParsePathspec(const std::string &pathspec_str, bool negation) {
97
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 2301 if (pathspec_str.empty()) {
98 490 return true;
99 }
100
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 1811 const Pathspec pathspec(pathspec_str);
101
102 // all generated Pathspecs need to be valid and positive rules must be
103 // absolute. Otherwise the .cvmfsdirtab is not valid.
104
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 1811 if (!pathspec.IsValid() || (!negation && !pathspec.IsAbsolute())) {
105 98 return false;
106 }
107
108 // create a new dirtab rule
109
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 1713 const Rule rule(pathspec, negation);
110
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 1713 AddRule(rule);
111 1713 return true;
112 1811 }
113
114
115 1713 void Dirtab::AddRule(const Rule &rule) {
116
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 1713 if (rule.is_negation) {
117 863 negative_rules_.push_back(rule);
118 } else {
119 850 positive_rules_.push_back(rule);
120 }
121 1713 }
122
123
124 612 bool Dirtab::CheckRuleValidity() const {
125 // check if there are contradicting positive and negative rules
126 612 Rules::const_iterator p = positive_rules_.begin();
127 612 const Rules::const_iterator pend = positive_rules_.end();
128
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 1364 for (; p != pend; ++p) {
129
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 801 assert(!p->is_negation);
130 801 Rules::const_iterator n = negative_rules_.begin();
131 801 const Rules::const_iterator nend = negative_rules_.end();
132
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 2113 for (; n != nend; ++n) {
133
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 1361 assert(n->is_negation);
134
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 1361 if (p->pathspec == n->pathspec) {
135 49 return false;
136 }
137 }
138 }
139
140 563 return true;
141 }
142
143
144 1813 bool Dirtab::IsMatching(const std::string &path) const {
145 // check if path has a positive match
146 1813 bool has_positive_match = false;
147 1813 Rules::const_iterator p = positive_rules_.begin();
148 1813 const Rules::const_iterator pend = positive_rules_.end();
149
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 3356 for (; p != pend; ++p) {
150
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 2730 assert(!p->is_negation);
151
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 2730 if (p->pathspec.IsMatching(path)) {
152 1187 has_positive_match = true;
153 1187 break;
154 }
155 }
156
157
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 1813 return has_positive_match && !IsOpposing(path);
158 }
159
160
161 2869 bool Dirtab::IsOpposing(const std::string &path) const {
162 2869 Rules::const_iterator n = negative_rules_.begin();
163 2869 const Rules::const_iterator nend = negative_rules_.end();
164
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 7947 for (; n != nend; ++n) {
165
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 6174 assert(n->is_negation);
166
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 6174 if (n->pathspec.IsMatchingRelaxed(path)) {
167 1096 return true;
168 }
169 }
170
171 1773 return false;
172 }
173
174 } // namespace catalog
175