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-rw-r--r--lib/Makefile.am1
-rw-r--r--lib/util.cc127
2 files changed, 128 insertions, 0 deletions
diff --git a/lib/Makefile.am b/lib/Makefile.am
index a904569..7d44856 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -14,2 +14,3 @@ libkonforka_la_SOURCES = \
14 exception.cc \ 14 exception.cc \
15 util.cc \
15 pointer_map.cc \ 16 pointer_map.cc \
diff --git a/lib/util.cc b/lib/util.cc
new file mode 100644
index 0000000..74039c6
--- a/dev/null
+++ b/lib/util.cc
@@ -0,0 +1,127 @@
1#include <sys/types.h>
2#include <sys/stat.h>
3#include <konforka/util.h>
4
5namespace konforka {
6
7 /*
8 * XXX: this code is borrowed from sitecing as is, although it should be optimized.
9 */
10
11 string normalize_path(const string& p,int o) {
12 const char *s = p.c_str();
13 if( s[0]=='.' && s[1]=='/' )
14 s += 2; // skip leading './'
15 if(o&strip_leading_slash)
16 for(;(*s)=='/';s++);
17 string rv;
18 string::size_type notslash = 0;
19 for(;*s;s++) {
20 if(s[0]=='/') {
21 if(s[1]=='/')
22 continue; // skip duplicate slash
23 if(s[1]=='.' && s[2]=='/') {
24 // '/./' sequence encountered
25 s += 2;
26 continue;
27 }
28 }
29 if(
30 (o&restrict_dotdot) && (
31 ( rv.empty() && s[0]=='.' && s[1]=='.' && s[2]=='/' ) // '^../'
32 ||
33 ( s[0]=='/' && s[1]=='.' && s[2]=='.' && (s[3]=='/' || s[3]==0) ) // '/../' or '/..$'
34 )
35 )
36 throw restricted_sequence_error(CODEPOINT,"restricted updir (..) sequence encountered");
37 rv += *s;
38 if( (*s) !='/' )
39 notslash = rv.length();
40 }
41 if(!(o&strip_trailing_slash))
42 notslash++;
43 if(notslash<rv.length())
44 rv.erase(notslash); // XXX: does this operation have enough sense to be performed?
45 return rv;
46 }
47
48 string dir_name(const string& p) {
49 string::size_type sl = p.find_last_of('/');
50 if(sl==string::npos)
51 return ""; // no slashes -- no dir.
52 string::size_type nosl = p.find_last_not_of('/',sl);
53 if(nosl==string::npos)
54 return ""; // only slashes -- no dir.
55 return p.substr(0,nosl+1);
56 }
57
58 string combine_path(const string& orig,const string& rel,int o) {
59 string r = normalize_path(rel,0);
60 if(r.empty()) {
61 // XXX: this behaviour is questionable.
62 return normalize_path( (o&origin_is_file)?dir_name(orig):orig, strip_leading_slash|restrict_dotdot|strip_trailing_slash);
63 }
64 string rv;
65 if(r[0]=='/') {
66 r.erase(0,1);
67 }else{
68 rv = normalize_path( (o&origin_is_file)?dir_name(orig):orig, restrict_dotdot|strip_trailing_slash);
69 }
70 string::size_type lsl = rv.rfind('/');
71 // iterate through slashes in relative path
72 for(string::size_type sl=r.find('/');sl!=string::npos;sl=r.find('/')) {
73 assert(sl!=0); // sure we don't start with '/' at this point
74 if(sl==1 && r[0]=='.') { // './'
75 r.erase(0,2);
76 }else if(sl==2 && r[0]=='.' && r[1]=='.') { // '../'
77 if(lsl==string::npos) {
78 if(rv.empty() && (o&fail_beyond_root))
79 throw beyond_root_error(CODEPOINT,"went beyond root while combining path");
80 rv.clear();
81 }else{
82 rv.erase(lsl);
83 lsl = rv.rfind('/');
84 }
85 r.erase(0,3);
86 }else{ // 'something/'
87 lsl = rv.length();
88 rv += '/';
89 rv += r.substr(0,sl);
90 r.erase(0,sl+1);
91 }
92 }
93 if(r.empty())
94 return rv+'/';
95 if(r.length()==2 && r[0]=='.' && r[1]=='.') {
96 if(lsl==string::npos) {
97 if(rv.empty() && (o&fail_beyond_root))
98 throw beyond_root_error(CODEPOINT,"went beyond root while combining path");
99 return "/";
100 }else{
101 rv.erase(lsl+1);
102 return rv;
103 }
104 }
105 rv += '/';
106 rv += r;
107 return rv;
108 }
109
110 void make_path(const string& p,mode_t m) {
111 struct stat st;
112 for(string::size_type sl=0;sl!=string::npos;sl=p.find('/',sl+1)) {
113 if(!sl)
114 continue;
115 string pp = p.substr(0,sl);
116 if(stat(pp.c_str(),&st) || !S_ISDIR(st.st_mode)) {
117 if(mkdir(pp.c_str(),m))
118 throw konforka::system_error(CODEPOINT,"failed to mkdir()");
119 }
120 }
121 if(stat(p.c_str(),&st) || !S_ISDIR(st.st_mode)) {
122 if(mkdir(p.c_str(),m))
123 throw konforka::system_error(CODEPOINT,"failed to mkdir()");
124 }
125 }
126
127}