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* We mangle the attribute names now, since '/' in attribute names seemed

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to be problematic.
* Changed our xattr attribute namespace to "user.haiku." to prevent
  xattrs from other programs (e.g. Beagle) to end up on the image.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22167 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold 2007-09-04 18:49:08 +00:00
parent bf96bbafd8
commit 011e7a3d71
1 changed files with 73 additions and 17 deletions
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90
src/build/libroot/fs_attr_xattr.cpp
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@ -36,8 +36,8 @@ using std::map;
using std::string;
// the namespace all attributes live in
static const char* kAttributeNamespace = "user.";
static const int kAttributeNamespaceLen = 5;
static const char* kAttributeNamespace = "user.haiku.";
static const int kAttributeNamespaceLen = 11;
// the maximum length of an attribute listing we support
static const int kMaxAttributeListingLength = 10240;
@ -46,6 +46,65 @@ static const int kMaxAttributeListingLength = 10240;
static const int kMaxAttributeLength = 10240 * 4;
// mangle_attribute_name
static string
mangle_attribute_name(const char* name)
{
// prepend our xattr namespace and translate:
// '/' -> "%\"
// '%' -> "%%"
string mangledName = kAttributeNamespace;
for (int i = 0; name[i] != '\0'; i++) {
char c = name[i];
switch (c) {
case '/':
mangledName += "%\\";
break;
case '%':
mangledName += "%%";
break;
default:
mangledName += c;
break;
}
}
return mangledName;
}
// demangle_attribute_name
static bool
demangle_attribute_name(const char* name, string& demangledName)
{
// chop of our xattr namespace and translate:
// "%\" -> '/'
// "%%" -> '%'
if (strncmp(name, kAttributeNamespace, kAttributeNamespaceLen) != 0)
return false;
name += kAttributeNamespaceLen;
demangledName = "";
for (int i = 0; name[i] != '\0'; i++) {
char c = name[i];
if (c == '%') {
c = name[++i];
if (c == '%')
demangledName += c;
else if (c == '\\')
demangledName += '/';
else
return false;
} else
demangledName += c;
}
return true;
}
namespace {
@ -158,10 +217,11 @@ public:
fListingIndex += nameLen + 1;
// check the attribute namespace
if (strncmp(name, kAttributeNamespace, kAttributeNamespaceLen) != 0)
string demangledName;
if (!demangle_attribute_name(name, demangledName))
continue;
name += kAttributeNamespaceLen;
nameLen -= kAttributeNamespaceLen;
name = demangledName.c_str();
nameLen = demangledName.length();
if (nameLen == 0) {
// Uh, weird attribute.
@ -393,9 +453,8 @@ fs_read_attr(int fd, const char *_attribute, uint32 type, off_t pos,
return -1;
}
// prepend the attribute namespace
string attribute = kAttributeNamespace;
attribute += _attribute;
// mangle the attribute name
string attribute = mangle_attribute_name(_attribute);
// read the attribute
char attributeBuffer[sizeof(AttributeHeader) + kMaxAttributeLength];
@ -455,9 +514,8 @@ fs_write_attr(int fd, const char *_attribute, uint32 type, off_t pos,
return -1;
}
// prepend the attribute namespace
string attribute = kAttributeNamespace;
attribute += _attribute;
// mangle the attribute name
string attribute = mangle_attribute_name(_attribute);
// prepare an attribute buffer
char attributeBuffer[sizeof(AttributeHeader) + kMaxAttributeLength];
@ -500,9 +558,8 @@ fs_remove_attr(int fd, const char *_attribute)
return -1;
}
// prepend the attribute namespace
string attribute = kAttributeNamespace;
attribute += _attribute;
// mangle the attribute name
string attribute = mangle_attribute_name(_attribute);
// remove attribute
int result;
@ -538,9 +595,8 @@ fs_stat_attr(int fd, const char *_attribute, struct attr_info *attrInfo)
return -1;
}
// prepend the attribute namespace
string attribute = kAttributeNamespace;
attribute += _attribute;
// mangle the attribute name
string attribute = mangle_attribute_name(_attribute);
// read the attribute
char attributeBuffer[sizeof(AttributeHeader) + kMaxAttributeLength];