/**
* This function emulates the @result of readlink("@referer") with
* respect to @tracee, where @referer is a strict subpath of "/proc".
* This function returns the length of @result if the readlink was
* emulated, 0 otherwise.
*
* Unlike readlink(), this function includes the nul terminating byte
* to @result (but this byte is not counted in the returned value).
*/
size_t readlink_proc2(const Tracee *tracee, char result[PATH_MAX], const char referer[PATH_MAX])
{
Action action;
char base[PATH_MAX];
char *component;
assert(compare_paths("/proc", referer) == PATH1_IS_PREFIX);
/* It's safe to use strrchr() here since @referer was
* previously canonicalized. */
strcpy(base, referer);
component = strrchr(base, '/');
/* These cases are not possible: @referer is supposed to be a
* canonicalized subpath of "/proc". */
assert(component != NULL && component != base);
component[0] = '\0';
component++;
if (component[0] == '\0')
return 0;
action = readlink_proc(tracee, result, base, component, PATH1_IS_PREFIX);
return (action == CANONICALIZE ? strlen(result) : 0);
}
/**
* Check if the translated @host_path belongs to the guest rootfs,
* that is, isn't from a binding.
*/
bool belongs_to_guestfs(const Tracee *tracee, const char *host_path)
{
Comparison comparison;
comparison = compare_paths(get_root(tracee), host_path);
return (comparison == PATHS_ARE_EQUAL || comparison == PATH1_IS_PREFIX);
}
/**
* Bind content of @vectors over /proc/{@ptracee->pid}/auxv. This
* function returns -1 if an error occurred, otherwise 0.
*/
static int bind_proc_pid_auxv(const Tracee *ptracee)
{
word_t vectors_address;
ElfAuxVector *vectors;
const char *guest_path;
const char *host_path;
Binding *binding;
int status;
vectors_address = get_elf_aux_vectors_address(ptracee);
if (vectors_address == 0)
return -1;
vectors = fetch_elf_aux_vectors(ptracee, vectors_address);
if (vectors == NULL)
return -1;
/* Path to these ELF auxiliary vectors. */
guest_path = talloc_asprintf(ptracee->ctx, "/proc/%d/auxv", ptracee->pid);
if (guest_path == NULL)
return -1;
/* Remove binding to this path, if any. It contains ELF
* auxiliary vectors of the previous execve(2). */
binding = get_binding(ptracee, GUEST, guest_path);
if (binding != NULL && compare_paths(binding->guest.path, guest_path) == PATHS_ARE_EQUAL) {
remove_binding_from_all_lists(ptracee, binding);
TALLOC_FREE(binding);
}
host_path = create_temp_file(ptracee->ctx, "auxv");
if (host_path == NULL)
return -1;
status = fill_file_with_auxv(ptracee, host_path, vectors);
if (status < 0)
return -1;
/* Note: this binding will be removed once ptracee gets freed. */
binding = insort_binding3(ptracee, ptracee->life_context, host_path, guest_path);
if (binding == NULL)
return -1;
/* This temporary file (host_path) will be removed once the
* binding is freed. */
talloc_reparent(ptracee->ctx, binding, host_path);
return 0;
}
int is_virtual_path ( char const* path ) {
size_t len = 0;
ZIPFSVirtualPath* cursor = sVirtualPaths;
for ( ; cursor; cursor = cursor->mNext ) {
char* test = cursor->mPath;
len = compare_paths ( test, path );
if ( !test [ len ]) return 1;
}
return 0;
}
//----------------------------------------------------------------//
char* zipfs_get_rel_path ( char const* path ) {
size_t depth = 0;
size_t i = 0;
size_t same;
if ( !path ) return 0;
if ( path [ 0 ] == '.' ) {
return zipfs_bless_path ( path );
}
if ( !(( path [ 0 ] == '/' ) || ( path [ 0 ] == '\\' ) || ( path [ 0 ] == ':' ))) {
ZIPFSString_Set ( sBuffer, "./" );
ZIPFSString_Append ( sBuffer, path );
zipfs_bless_path ( sBuffer->mMem );
return sBuffer->mMem;
}
// store the expanded path in sBuffer
zipfs_get_abs_filepath ( path );
same = compare_paths ( path, sWorkingPath->mMem );
if ( same == 0 ) {
return zipfs_bless_path ( path );
}
// count the number of steps up in the current directory
for ( i = same; sWorkingPath->mMem [ i ]; ++i ) {
if ( sWorkingPath->mMem [ i ] == '/' ) {
depth++;
}
}
ZIPFSString_Shift ( sBuffer, same, sBuffer->mStrLen - same, depth * 3 );
sBuffer->mStrLen = sBuffer->mStrLen - same + ( depth * 3 );
sBuffer->mMem [ sBuffer->mStrLen ] = 0;
for ( i = 0; i < depth; ++i ) {
size_t j = i * 3;
sBuffer->mMem [ j + 0 ] = '.';
sBuffer->mMem [ j + 1 ] = '.';
sBuffer->mMem [ j + 2 ] = '/';
}
return sBuffer->mMem;
}
ZIPFSVirtualPath* find_virtual_path ( char const* path ) {
size_t len = 0;
ZIPFSVirtualPath* cursor = sVirtualPaths;
for ( ; cursor; cursor = cursor->mNext ) {
char* test = cursor->mPath;
len = compare_paths ( test, path );
if ( !( test [ len ] || path [ len ])) break;
}
return cursor;
}
/**
* Print all bindings (verbose purpose).
*/
static void print_bindings(const Tracee *tracee)
{
const Binding *binding;
if (tracee->fs->bindings.guest == NULL)
return;
CIRCLEQ_FOREACH_(tracee, binding, GUEST) {
if (compare_paths(binding->host.path, binding->guest.path) == PATHS_ARE_EQUAL)
notice(tracee, INFO, USER, "binding = %s", binding->host.path);
else
notice(tracee, INFO, USER, "binding = %s:%s",
binding->host.path, binding->guest.path);
}
}
ZIPFSVirtualPath* find_next_virtual_subdir ( char const* path, ZIPFSVirtualPath* cursor ) {
size_t len = 0;
cursor = cursor ? cursor->mNext : sVirtualPaths;
for ( ; cursor; cursor = cursor->mNext ) {
char* test = cursor->mPath;
len = compare_paths ( test, path );
if ( test [ len ] && ( !path [ len ])) {
return cursor;
}
}
return 0;
}
ZIPFSVirtualPath* find_best_virtual_path ( char const* path ) {
size_t len = 0;
size_t bestlen = 0;
ZIPFSVirtualPath* best = 0;
ZIPFSVirtualPath* cursor = sVirtualPaths;
for ( ; cursor; cursor = cursor->mNext ) {
char* test = cursor->mPath;
len = compare_paths ( test, path );
if (( !test [ len ]) && ( len > bestlen )) {
best = cursor;
bestlen = len;
}
}
return best;
}
/**
* Get the binding for the given @path (relatively to the given
* binding @side).
*/
static const Binding *get_binding(Tracee *tracee, Side side, const char path[PATH_MAX])
{
const Binding *binding;
size_t path_length = strlen(path);
/* Sanity checks. */
assert(path != NULL && path[0] == '/');
CIRCLEQ_FOREACH_(tracee, binding, side) {
Comparison comparison;
const Path *ref;
switch (side) {
case GUEST:
ref = &binding->guest;
break;
case HOST:
ref = &binding->host;
break;
default:
assert(0);
return NULL;
}
comparison = compare_paths2(ref->path, ref->length, path, path_length);
if ( comparison != PATHS_ARE_EQUAL
&& comparison != PATH1_IS_PREFIX)
continue;
/* Avoid false positive when a prefix of the rootfs is
* used as an asymmetric binding, ex.:
*
* proot -m /usr:/location /usr/local/slackware
*/
if ( side == HOST
&& compare_paths(get_root(tracee), "/") != PATHS_ARE_EQUAL
&& belongs_to_guestfs(tracee, path))
continue;
return binding;
}
file_t * database_find_file (const database_t * db, const char * path)
{
// We maintain the invariants: All items below index low are before path.
// All items at or above index high are after path. If path is present,
// then its index is between low (inclusive) and high (exclusive).
ssize_t low = 0;
ssize_t high = db->files_end - db->files;
while (high > low) {
ssize_t mid = (low + high) >> 1;
int c = compare_paths (db->files[mid].path, path);
if (c == 0)
return db->files + mid;
if (c < 0)
low = mid + 1;
else
high = mid;
}
return NULL;
}
void bcp_implementation::output_license_info()
{
std::pair<const license_info*, int> licenses = get_licenses();
std::map<int, license_data>::const_iterator i, j;
i = m_license_data.begin();
j = m_license_data.end();
std::ofstream os(m_dest_path.string().c_str());
if(!os)
{
std::string msg("Error opening ");
msg += m_dest_path.string();
msg += " for output.";
std::runtime_error e(msg);
boost::throw_exception(e);
}
os <<
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\">\n"
"<html>\n"
"<head>\n"
"<title>Boost Licence Dependency Information";
if(m_module_list.size() == 1)
{
os << " for " << *(m_module_list.begin());
}
os <<
"</title>\n"
"</head>\n"
"<body>\n"
"<H1>Boost Licence Dependency Information";
if(m_module_list.size() == 1)
{
os << " for " << *(m_module_list.begin());
}
os <<
"</H1>\n"
"<H2>Contents</h2>\n"
"<pre><a href=\"#input\">Input Information</a>\n";
if(!m_bsl_summary_mode)
os << "<a href=\"#summary\">Licence Summary</a>\n";
os << "<a href=\"#details\">Licence Details</a>\n";
while(i != j)
{
// title:
os << " <A href=\"#" << make_link_target(licenses.first[i->first].license_name)
<< "\">" << licenses.first[i->first].license_name << "</a>\n";
++i;
}
os << "<a href=\"#files\">Files with no recognised license</a>\n"
"<a href=\"#authors\">Files with no recognised copyright holder</a>\n";
if(!m_bsl_summary_mode)
{
os <<
"Moving to the Boost Software License...\n"
" <a href=\"#bsl-converted\">Files that can be automatically converted to the Boost Software License</a>\n"
" <a href=\"#to-bsl\">Files that can be manually converted to the Boost Software License</a>\n"
" <a href=\"#not-to-bsl\">Files that can <b>NOT</b> be moved to the Boost Software License</a>\n"
" <a href=\"#need-bsl-authors\">Authors we need to move to the Boost Software License</a>\n"
"<a href=\"#copyright\">Copyright Holder Information</a>\n";
}
os <<
"<a href=\"#depend\">File Dependency Information</a>\n"
"</pre>";
//
// input Information:
//
os << "<a name=\"input\"></a><h2>Input Information</h2>\n";
if(m_scan_mode)
os << "<P>The following files were scanned for boost dependencies:<BR>";
else
os << "<P>The following Boost modules were checked:<BR>";
std::list<std::string>::const_iterator si = m_module_list.begin();
std::list<std::string>::const_iterator sj = m_module_list.end();
while(si != sj)
{
os << *si << "<BR>";
++si;
}
os << "</p><p>The Boost path was: <code>" << m_boost_path.string() << "</code></P>";
//
// extract the boost version number from the boost directory tree,
// not from this app (which may have been built from a previous
// version):
//
fileview version_file(m_boost_path / "boost/version.hpp");
static const boost::regex version_regex(
"^[[:blank:]]*#[[:blank:]]*define[[:blank:]]+BOOST_VERSION[[:blank:]]+(\\d+)");
boost::cmatch what;
if(boost::regex_search(version_file.begin(), version_file.end(), what, version_regex))
{
int version = boost::lexical_cast<int>(what.str(1));
os << "<p>The Boost version is: " << version / 100000 << "." << version / 100 % 1000 << "." << version % 100 << "</P>\n";
}
//
// output each license:
//
i = m_license_data.begin();
j = m_license_data.end();
if(!m_bsl_summary_mode)
{
//
// start with the summary:
//
os << "<a name=\"summary\"></a><h2>Licence Summary</h2>\n";
while(i != j)
{
// title:
os <<
"<H3>" << licenses.first[i->first].license_name << "</H3>\n";
// license text:
os << "<BLOCKQUOTE>" << licenses.first[i->first].license_text << "</BLOCKQUOTE>";
// Copyright holders:
os << "<P>This license is used by " << i->second.authors.size()
<< " authors and " << i->second.files.size()
<< " files <a href=\"#" << make_link_target(licenses.first[i->first].license_name) << "\">(see details)</a>";
os << "</P></BLOCKQUOTE>\n";
++i;
}
}
//
// and now the details:
//
i = m_license_data.begin();
j = m_license_data.end();
int license_index = 0;
os << "<a name=\"details\"></a><h2>Licence Details</h2>\n";
while(i != j)
{
// title:
os <<
"<H3><A name=\"" << make_link_target(licenses.first[i->first].license_name)
<< "\"></a>" << licenses.first[i->first].license_name << "</H3>\n";
// license text:
os << "<BLOCKQUOTE>" << licenses.first[i->first].license_text << "</BLOCKQUOTE>";
if(!m_bsl_summary_mode || (license_index >= 3))
{
// Copyright holders:
os << "<P>This license is used by the following " << i->second.authors.size() << " copyright holders:</P>\n<BLOCKQUOTE><P>";
std::set<std::string>::const_iterator x, y;
x = i->second.authors.begin();
y = i->second.authors.end();
while(x != y)
{
os << *x << "<BR>\n";
++x;
}
os << "</P></BLOCKQUOTE>\n";
// Files using this license:
os << "<P>This license applies to the following " << i->second.files.size() << " files:</P>\n<BLOCKQUOTE><P>";
std::set<fs::path, path_less>::const_iterator m, n;
m = i->second.files.begin();
n = i->second.files.end();
while(m != n)
{
os << split_path(m_boost_path, *m) << "<br>\n";
++m;
}
os << "</P></BLOCKQUOTE>\n";
}
else
{
os << "<P>This license is used by " << i->second.authors.size() << " authors (list omitted for brevity).</P>\n";
os << "<P>This license applies to " << i->second.files.size() << " files (list omitted for brevity).</P>\n";
}
++license_index;
++i;
}
//
// Output list of files not found to be under license control:
//
os << "<h2><a name=\"files\"></a>Files With No Recognisable Licence</h2>\n"
"<P>The following " << m_unknown_licenses.size() << " files had no recognisable license information:</P><BLOCKQUOTE><P>\n";
std::set<fs::path, path_less>::const_iterator i2, j2;
i2 = m_unknown_licenses.begin();
j2 = m_unknown_licenses.end();
while(i2 != j2)
{
os << split_path(m_boost_path, *i2) << "<br>\n";
++i2;
}
os << "</p></BLOCKQUOTE>";
//
// Output list of files with no found copyright holder:
//
os << "<h2><a name=\"authors\"></a>Files With No Recognisable Copyright Holder</h2>\n"
"<P>The following " << m_unknown_authors.size() << " files had no recognisable copyright holder:</P>\n<BLOCKQUOTE><P>";
i2 = m_unknown_authors.begin();
j2 = m_unknown_authors.end();
while(i2 != j2)
{
os << split_path(m_boost_path, *i2) << "<br>\n";
++i2;
}
os << "</p></BLOCKQUOTE>";
if(!m_bsl_summary_mode)
{
//
// Output list of files that have been moved over to the Boost
// Software License, along with enough information for human
// verification.
//
os << "<h2><a name=\"bsl-converted\"></a>Files that can be automatically converted to the Boost Software License</h2>\n"
<< "<P>The following " << m_converted_to_bsl.size() << " files can be automatically converted to the Boost Software License, but require manual verification before they can be committed to CVS:</P>\n";
if (!m_converted_to_bsl.empty())
{
typedef std::map<fs::path, std::pair<std::string, std::string>, path_less>
::const_iterator conv_iterator;
conv_iterator i = m_converted_to_bsl.begin(),
ie = m_converted_to_bsl.end();
int file_num = 1;
while (i != ie)
{
os << "<P>[" << file_num << "] File: <tt>" << split_path(m_boost_path, i->first)
<< "</tt><br>\n<table border=\"1\">\n <tr>\n <td><pre>"
<< i->second.first << "</pre></td>\n <td><pre>"
<< i->second.second << "</pre></td>\n </tr>\n</table>\n";
++i;
++file_num;
}
}
//
// Output list of files that could be moved over to the Boost Software License
//
os << "<h2><a name=\"to-bsl\"></a>Files that could be converted to the Boost Software License</h2>\n"
"<P>The following " << m_can_migrate_to_bsl.size() << " files could be manually converted to the Boost Software License, but have not yet been:</P>\n<BLOCKQUOTE><P>";
i2 = m_can_migrate_to_bsl.begin();
j2 = m_can_migrate_to_bsl.end();
while(i2 != j2)
{
os << split_path(m_boost_path, *i2) << "<br>\n";
++i2;
}
os << "</p></BLOCKQUOTE>";
//
// Output list of files that can not be moved over to the Boost Software License
//
os << "<h2><a name=\"not-to-bsl\"></a>Files that can NOT be converted to the Boost Software License</h2>\n"
"<P>The following " << m_cannot_migrate_to_bsl.size() << " files cannot be converted to the Boost Software License because we need the permission of more authors:</P>\n<BLOCKQUOTE><P>";
i2 = m_cannot_migrate_to_bsl.begin();
j2 = m_cannot_migrate_to_bsl.end();
while(i2 != j2)
{
os << split_path(m_boost_path, *i2) << "<br>\n";
++i2;
}
os << "</p></BLOCKQUOTE>";
//
// Output list of authors that we need permission for to move to the BSL
//
os << "<h2><a name=\"need-bsl-authors\"></a>Authors we need for the BSL</h2>\n"
"<P>Permission of the following authors is needed before we can convert to the Boost Software License. The list of authors that have given their permission is contained in <code>more/blanket-permission.txt</code>.</P>\n<BLOCKQUOTE><P>";
std::copy(m_authors_for_bsl_migration.begin(), m_authors_for_bsl_migration.end(),
std::ostream_iterator<std::string>(os, "<br>\n"));
os << "</p></BLOCKQUOTE>";
//
// output a table of copyright information:
//
os << "<H2><a name=\"copyright\"></a>Copyright Holder Information</H2><table border=\"1\">\n";
std::map<std::string, std::set<fs::path, path_less> >::const_iterator ad, ead;
ad = m_author_data.begin();
ead = m_author_data.end();
while(ad != ead)
{
os << "<tr><td>" << ad->first << "</td><td>";
std::set<fs::path, path_less>::const_iterator fi, efi;
fi = ad->second.begin();
efi = ad->second.end();
while(fi != efi)
{
os << split_path(m_boost_path, *fi) << " ";
++fi;
}
os << "</td></tr>\n";
++ad;
}
os << "</table>\n";
}
//
// output file dependency information:
//
os << "<H2><a name=\"depend\"></a>File Dependency Information</H2><BLOCKQUOTE><pre>\n";
std::map<fs::path, fs::path, path_less>::const_iterator dep, last_dep;
std::set<fs::path, path_less>::const_iterator fi, efi;
fi = m_copy_paths.begin();
efi = m_copy_paths.end();
// if in summary mode, just figure out the "bad" files and print those only:
std::set<fs::path, path_less> bad_paths;
if(m_bsl_summary_mode)
{
bad_paths.insert(m_unknown_licenses.begin(), m_unknown_licenses.end());
bad_paths.insert(m_unknown_authors.begin(), m_unknown_authors.end());
bad_paths.insert(m_can_migrate_to_bsl.begin(), m_can_migrate_to_bsl.end());
bad_paths.insert(m_cannot_migrate_to_bsl.begin(), m_cannot_migrate_to_bsl.end());
typedef std::map<fs::path, std::pair<std::string, std::string>, path_less>
::const_iterator conv_iterator;
conv_iterator i = m_converted_to_bsl.begin(),
ie = m_converted_to_bsl.end();
while(i != ie)
{
bad_paths.insert(i->first);
++i;
}
fi = bad_paths.begin();
efi = bad_paths.end();
os << "<P>For brevity, only files not under the BSL are shown</P>\n";
}
while(fi != efi)
{
os << split_path(m_boost_path, *fi);
dep = m_dependencies.find(*fi);
last_dep = m_dependencies.end();
std::set<fs::path, path_less> seen_deps;
if (dep != last_dep)
while(true)
{
os << " -> ";
if(fs::exists(m_boost_path / dep->second))
os << split_path(m_boost_path, dep->second);
else if(fs::exists(dep->second))
os << split_path(fs::path(), dep->second);
else
os << dep->second.string();
if(seen_deps.find(dep->second) != seen_deps.end())
{
os << " <I>(Circular dependency!)</I>";
break; // circular dependency!!!
}
seen_deps.insert(dep->second);
last_dep = dep;
dep = m_dependencies.find(dep->second);
if((dep == m_dependencies.end()) || (0 == compare_paths(dep->second, last_dep->second)))
break;
}
os << "\n";
++fi;
}
os << "</pre></BLOCKQUOTE>\n";
os << "</body></html>\n";
if(!os)
{
std::string msg("Error writing to ");
msg += m_dest_path.string();
msg += ".";
std::runtime_error e(msg);
boost::throw_exception(e);
}
}
/**
* Copy in @guest_path the canonicalization (see `man 3 realpath`) of
* @user_path regarding to @tracee->root. The path to canonicalize
* could be either absolute or relative to @guest_path. When the last
* component of @user_path is a link, it is dereferenced only if
* @deref_final is true -- it is useful for syscalls like lstat(2).
* The parameter @recursion_level should be set to 0 unless you know
* what you are doing. This function returns -errno if an error
* occured, otherwise it returns 0.
*/
int canonicalize(Tracee *tracee, const char *user_path, bool deref_final,
char guest_path[PATH_MAX], unsigned int recursion_level)
{
char scratch_path[PATH_MAX];
Finality finality;
const char *cursor;
int status;
/* Avoid infinite loop on circular links. */
if (recursion_level > MAXSYMLINKS)
return -ELOOP;
/* Sanity checks. */
assert(user_path != NULL);
assert(guest_path != NULL);
assert(user_path != guest_path);
if (strnlen(guest_path, PATH_MAX) >= PATH_MAX)
return -ENAMETOOLONG;
if (user_path[0] != '/') {
/* Ensure 'guest_path' contains an absolute base of
* the relative `user_path`. */
if (guest_path[0] != '/')
return -EINVAL;
}
else
strcpy(guest_path, "/");
/* Canonicalize recursely 'user_path' into 'guest_path'. */
cursor = user_path;
finality = NOT_FINAL;
while (!IS_FINAL(finality)) {
Comparison comparison;
char component[NAME_MAX];
char host_path[PATH_MAX];
finality = next_component(component, &cursor);
status = (int) finality;
if (status < 0)
return status;
if (strcmp(component, ".") == 0) {
if (IS_FINAL(finality))
finality = FINAL_DOT;
continue;
}
if (strcmp(component, "..") == 0) {
pop_component(guest_path);
if (IS_FINAL(finality))
finality = FINAL_SLASH;
continue;
}
status = join_paths(2, scratch_path, guest_path, component);
if (status < 0)
return status;
/* Resolve bindings and check that a non-final
* component exists and either is a directory or is a
* symlink. For this latter case, we check that the
* symlink points to a directory once it is
* canonicalized, at the end of this loop. */
status = substitute_binding_stat(tracee, finality, recursion_level, scratch_path, host_path);
if (status < 0)
return status;
/* Nothing special to do if it's not a link or if we
* explicitly ask to not dereference 'user_path', as
* required by syscalls like lstat(2). Obviously, this
* later condition does not apply to intermediate path
* components. Errors are explicitly ignored since
* they should be handled by the caller. */
if (status <= 0 || (finality == FINAL_NORMAL && !deref_final)) {
strcpy(scratch_path, guest_path);
status = join_paths(2, guest_path, scratch_path, component);
if (status < 0)
return status;
continue;
}
/* It's a link, so we have to dereference *and*
* canonicalize to ensure we are not going outside the
* new root. */
comparison = compare_paths("/proc", guest_path);
switch (comparison) {
case PATHS_ARE_EQUAL:
case PATH1_IS_PREFIX:
/* Some links in "/proc" are generated
* dynamically by the kernel. PRoot has to
* emulate some of them. */
status = readlink_proc(tracee, scratch_path,
guest_path, component, comparison);
switch (status) {
case CANONICALIZE:
/* The symlink is already dereferenced,
* now canonicalize it. */
goto canon;
case DONT_CANONICALIZE:
/* If and only very final, this symlink
* shouldn't be dereferenced nor canonicalized. */
if (finality == FINAL_NORMAL) {
strcpy(guest_path, scratch_path);
return 0;
}
break;
default:
if (status < 0)
return status;
}
default:
break;
}
status = readlink(host_path, scratch_path, sizeof(scratch_path));
if (status < 0)
return status;
else if (status == sizeof(scratch_path))
return -ENAMETOOLONG;
scratch_path[status] = '\0';
/* Remove the leading "root" part if needed, it's
* useful for "/proc/self/cwd/" for instance. */
status = detranslate_path(tracee, scratch_path, host_path);
if (status < 0)
return status;
canon:
/* Canonicalize recursively the referee in case it
* is/contains a link, moreover if it is not an
* absolute link then it is relative to
* 'guest_path'. */
status = canonicalize(tracee, scratch_path, true, guest_path, recursion_level + 1);
if (status < 0)
return status;
/* Check that a non-final canonicalized/dereferenced
* symlink exists and is a directory. */
status = substitute_binding_stat(tracee, finality, recursion_level, guest_path, host_path);
if (status < 0)
return status;
/* Here, 'guest_path' shouldn't be a symlink anymore,
* unless it is a named file descriptor. */
assert(status != 1 || sscanf(guest_path, "/proc/%*d/fd/%d", &status) == 1);
}
/* At the exit stage of the first level of recursion,
* `guest_path` is fully canonicalized but a terminating '/'
* or a terminating '.' may be required to keep the initial
* semantic of `user_path`. */
if (recursion_level == 0) {
switch (finality) {
case FINAL_NORMAL:
break;
case FINAL_SLASH:
strcpy(scratch_path, guest_path);
status = join_paths(2, guest_path, scratch_path, "");
if (status < 0)
return status;
break;
case FINAL_DOT:
strcpy(scratch_path, guest_path);
status = join_paths(2, guest_path, scratch_path, ".");
if (status < 0)
return status;
break;
default:
assert(0);
}
}
return 0;
}
/**
* Translate the output arguments of the current @tracee's syscall in
* the @tracee->pid process area. This function sets the result of
* this syscall to @tracee->status if an error occured previously
* during the translation, that is, if @tracee->status is less than 0.
*/
void translate_syscall_exit(Tracee *tracee)
{
word_t syscall_number;
word_t syscall_result;
int status;
status = notify_extensions(tracee, SYSCALL_EXIT_START, 0, 0);
if (status < 0) {
poke_reg(tracee, SYSARG_RESULT, (word_t) status);
goto end;
}
if (status > 0)
return;
/* Set the tracee's errno if an error occured previously during
* the translation. */
if (tracee->status < 0) {
poke_reg(tracee, SYSARG_RESULT, (word_t) tracee->status);
goto end;
}
/* Translate output arguments:
* - break: update the syscall result register with "status"
* - goto end: nothing else to do.
*/
syscall_number = get_sysnum(tracee, ORIGINAL);
syscall_result = peek_reg(tracee, CURRENT, SYSARG_RESULT);
switch (syscall_number) {
case PR_brk:
translate_brk_exit(tracee);
goto end;
case PR_getcwd: {
char path[PATH_MAX];
size_t new_size;
size_t size;
word_t output;
size = (size_t) peek_reg(tracee, ORIGINAL, SYSARG_2);
if (size == 0) {
status = -EINVAL;
break;
}
/* Ensure cwd still exists. */
status = translate_path(tracee, path, AT_FDCWD, ".", false);
if (status < 0)
break;
new_size = strlen(tracee->fs->cwd) + 1;
if (size < new_size) {
status = -ERANGE;
break;
}
/* Overwrite the path. */
output = peek_reg(tracee, ORIGINAL, SYSARG_1);
status = write_data(tracee, output, tracee->fs->cwd, new_size);
if (status < 0)
break;
/* The value of "status" is used to update the returned value
* in translate_syscall_exit(). */
status = new_size;
break;
}
case PR_accept:
case PR_accept4:
/* Nothing special to do if no sockaddr was specified. */
if (peek_reg(tracee, ORIGINAL, SYSARG_2) == 0)
goto end;
/* Fall through. */
case PR_getsockname:
case PR_getpeername: {
word_t sock_addr;
word_t size_addr;
word_t max_size;
/* Error reported by the kernel. */
if ((int) syscall_result < 0)
goto end;
sock_addr = peek_reg(tracee, ORIGINAL, SYSARG_2);
size_addr = peek_reg(tracee, MODIFIED, SYSARG_3);
max_size = peek_reg(tracee, MODIFIED, SYSARG_6);
status = translate_socketcall_exit(tracee, sock_addr, size_addr, max_size);
if (status < 0)
break;
/* Don't overwrite the syscall result. */
goto end;
}
#define SYSARG_ADDR(n) (args_addr + ((n) - 1) * sizeof_word(tracee))
#define POKE_WORD(addr, value) \
poke_word(tracee, addr, value); \
if (errno != 0) { \
status = -errno; \
break; \
}
#define PEEK_WORD(addr) \
peek_word(tracee, addr); \
if (errno != 0) { \
status = -errno; \
break; \
}
case PR_socketcall: {
word_t args_addr;
word_t sock_addr;
word_t size_addr;
word_t max_size;
args_addr = peek_reg(tracee, ORIGINAL, SYSARG_2);
switch (peek_reg(tracee, ORIGINAL, SYSARG_1)) {
case SYS_ACCEPT:
case SYS_ACCEPT4:
/* Nothing special to do if no sockaddr was specified. */
sock_addr = PEEK_WORD(SYSARG_ADDR(2));
if (sock_addr == 0)
goto end;
/* Fall through. */
case SYS_GETSOCKNAME:
case SYS_GETPEERNAME:
/* Handle these cases below. */
status = 1;
break;
case SYS_BIND:
case SYS_CONNECT:
/* Restore the initial parameters: this memory was
* overwritten at the enter stage. Remember: POKE_WORD
* puts -errno in status and breaks if an error
* occured. */
POKE_WORD(SYSARG_ADDR(2), peek_reg(tracee, MODIFIED, SYSARG_5));
POKE_WORD(SYSARG_ADDR(3), peek_reg(tracee, MODIFIED, SYSARG_6));
status = 0;
break;
default:
status = 0;
break;
}
/* Error reported by the kernel or there's nothing else to do. */
if ((int) syscall_result < 0 || status == 0)
goto end;
/* An error occured in SYS_BIND or SYS_CONNECT. */
if (status < 0)
break;
/* Remember: PEEK_WORD puts -errno in status and breaks if an
* error occured. */
sock_addr = PEEK_WORD(SYSARG_ADDR(2));
size_addr = PEEK_WORD(SYSARG_ADDR(3));
max_size = peek_reg(tracee, MODIFIED, SYSARG_6);
status = translate_socketcall_exit(tracee, sock_addr, size_addr, max_size);
if (status < 0)
break;
/* Don't overwrite the syscall result. */
goto end;
}
#undef SYSARG_ADDR
#undef PEEK_WORD
#undef POKE_WORD
case PR_fchdir:
case PR_chdir:
/* These syscalls are fully emulated, see enter.c for details
* (like errors). */
status = 0;
break;
case PR_rename:
case PR_renameat: {
char old_path[PATH_MAX];
char new_path[PATH_MAX];
ssize_t old_length;
ssize_t new_length;
Comparison comparison;
Reg old_reg;
Reg new_reg;
char *tmp;
/* Error reported by the kernel. */
if ((int) syscall_result < 0)
goto end;
if (syscall_number == PR_rename) {
old_reg = SYSARG_1;
new_reg = SYSARG_2;
}
else {
old_reg = SYSARG_2;
new_reg = SYSARG_4;
}
/* Get the old path, then convert it to the same
* "point-of-view" as tracee->fs->cwd (guest). */
status = read_path(tracee, old_path, peek_reg(tracee, MODIFIED, old_reg));
if (status < 0)
break;
status = detranslate_path(tracee, old_path, NULL);
if (status < 0)
break;
old_length = (status > 0 ? status - 1 : (ssize_t) strlen(old_path));
/* Nothing special to do if the moved path is not the
* current working directory. */
comparison = compare_paths(old_path, tracee->fs->cwd);
if (comparison != PATH1_IS_PREFIX && comparison != PATHS_ARE_EQUAL) {
status = 0;
break;
}
/* Get the new path, then convert it to the same
* "point-of-view" as tracee->fs->cwd (guest). */
status = read_path(tracee, new_path, peek_reg(tracee, MODIFIED, new_reg));
if (status < 0)
break;
status = detranslate_path(tracee, new_path, NULL);
if (status < 0)
break;
new_length = (status > 0 ? status - 1 : (ssize_t) strlen(new_path));
/* Sanity check. */
if (strlen(tracee->fs->cwd) >= PATH_MAX) {
status = 0;
break;
}
strcpy(old_path, tracee->fs->cwd);
/* Update the virtual current working directory. */
substitute_path_prefix(old_path, old_length, new_path, new_length);
tmp = talloc_strdup(tracee->fs, old_path);
if (tmp == NULL) {
status = -ENOMEM;
break;
}
TALLOC_FREE(tracee->fs->cwd);
tracee->fs->cwd = tmp;
status = 0;
break;
}
case PR_readlink:
case PR_readlinkat: {
char referee[PATH_MAX];
char referer[PATH_MAX];
size_t old_size;
size_t new_size;
size_t max_size;
word_t input;
word_t output;
/* Error reported by the kernel. */
if ((int) syscall_result < 0)
goto end;
old_size = syscall_result;
if (syscall_number == PR_readlink) {
output = peek_reg(tracee, ORIGINAL, SYSARG_2);
max_size = peek_reg(tracee, ORIGINAL, SYSARG_3);
input = peek_reg(tracee, MODIFIED, SYSARG_1);
}
else {
output = peek_reg(tracee, ORIGINAL, SYSARG_3);
max_size = peek_reg(tracee, ORIGINAL, SYSARG_4);
input = peek_reg(tracee, MODIFIED, SYSARG_2);
}
if (max_size > PATH_MAX)
max_size = PATH_MAX;
if (max_size == 0) {
status = -EINVAL;
break;
}
/* The kernel does NOT put the NULL terminating byte for
* readlink(2). */
status = read_data(tracee, referee, output, old_size);
if (status < 0)
break;
referee[old_size] = '\0';
/* Not optimal but safe (path is fully translated). */
status = read_path(tracee, referer, input);
if (status < 0)
break;
if (status >= PATH_MAX) {
status = -ENAMETOOLONG;
break;
}
status = detranslate_path(tracee, referee, referer);
if (status < 0)
break;
/* The original path doesn't require any transformation, i.e
* it is a symetric binding. */
if (status == 0)
goto end;
/* Overwrite the path. Note: the output buffer might be
* initialized with zeros but it was updated with the kernel
* result, and then with the detranslated result. This later
* might be shorter than the former, so it's safier to add a
* NULL terminating byte when possible. This problem was
* exposed by IDA Demo 6.3. */
if ((size_t) status < max_size) {
new_size = status - 1;
status = write_data(tracee, output, referee, status);
}
else {
new_size = max_size;
status = write_data(tracee, output, referee, max_size);
}
if (status < 0)
break;
/* The value of "status" is used to update the returned value
* in translate_syscall_exit(). */
status = new_size;
break;
}
#if defined(ARCH_X86_64)
case PR_uname: {
struct utsname utsname;
word_t address;
size_t size;
if (get_abi(tracee) != ABI_2)
goto end;
/* Error reported by the kernel. */
if ((int) syscall_result < 0)
goto end;
address = peek_reg(tracee, ORIGINAL, SYSARG_1);
status = read_data(tracee, &utsname, address, sizeof(utsname));
if (status < 0)
break;
/* Some 32-bit programs like package managers can be
* confused when the kernel reports "x86_64". */
size = sizeof(utsname.machine);
strncpy(utsname.machine, "i686", size);
utsname.machine[size - 1] = '\0';
status = write_data(tracee, address, &utsname, sizeof(utsname));
if (status < 0)
break;
status = 0;
break;
}
#endif
case PR_execve:
translate_execve_exit(tracee);
goto end;
case PR_ptrace:
status = translate_ptrace_exit(tracee);
break;
case PR_wait4:
case PR_waitpid:
if (tracee->as_ptracer.waits_in != WAITS_IN_PROOT)
goto end;
status = translate_wait_exit(tracee);
break;
case PR_setrlimit:
case PR_prlimit64:
/* Error reported by the kernel. */
if ((int) syscall_result < 0)
goto end;
status = translate_setrlimit_exit(tracee, syscall_number == PR_prlimit64);
if (status < 0)
break;
/* Don't overwrite the syscall result. */
goto end;
default:
goto end;
}
poke_reg(tracee, SYSARG_RESULT, (word_t) status);
end:
status = notify_extensions(tracee, SYSCALL_EXIT_END, status, 0);
if (status < 0)
poke_reg(tracee, SYSARG_RESULT, (word_t) status);
}
bool operator()(const fs::path& a, const fs::path& b)const
{ return compare_paths(a, b) < 0; }
/**
* Remove/substitute the leading part of a "translated" @path. It
* returns 0 if no transformation is required (ie. symmetric binding),
* otherwise it returns the size in bytes of the updated @path,
* including the end-of-string terminator. On error it returns
* -errno.
*/
int detranslate_path(Tracee *tracee, char path[PATH_MAX], const char t_referrer[PATH_MAX])
{
size_t prefix_length;
ssize_t new_length;
bool sanity_check;
bool follow_binding;
/* Sanity check. */
if (strnlen(path, PATH_MAX) >= PATH_MAX)
return -ENAMETOOLONG;
/* Don't try to detranslate relative paths (typically the
* target of a relative symbolic link). */
if (path[0] != '/')
return 0;
/* Is it a symlink? */
if (t_referrer != NULL) {
Comparison comparison;
sanity_check = false;
follow_binding = false;
/* In some cases bindings have to be resolved. */
comparison = compare_paths("/proc", t_referrer);
if (comparison == PATH1_IS_PREFIX) {
/* Some links in "/proc" are generated
* dynamically by the kernel. PRoot has to
* emulate some of them. */
char proc_path[PATH_MAX];
strcpy(proc_path, path);
new_length = readlink_proc2(tracee, proc_path, t_referrer);
if (new_length < 0)
return new_length;
if (new_length != 0) {
strcpy(path, proc_path);
return new_length + 1;
}
/* Always resolve bindings for symlinks in
* "/proc", they always point to the emulated
* file-system namespace by design. */
follow_binding = true;
}
else if (!belongs_to_guestfs(tracee, t_referrer)) {
const char *binding_referree;
const char *binding_referrer;
binding_referree = get_path_binding(tracee, HOST, path);
binding_referrer = get_path_binding(tracee, HOST, t_referrer);
assert(binding_referrer != NULL);
/* Resolve bindings for symlinks that belong
* to a binding and point to the same binding.
* For example, if "-b /lib:/foo" is specified
* and the symlink "/lib/a -> /lib/b" exists
* in the host rootfs namespace, then it
* should appear as "/foo/a -> /foo/b" in the
* guest rootfs namespace for consistency
* reasons. */
if (binding_referree != NULL) {
comparison = compare_paths(binding_referree, binding_referrer);
follow_binding = (comparison == PATHS_ARE_EQUAL);
}
}
}
else {
sanity_check = true;
follow_binding = true;
}
if (follow_binding) {
switch (substitute_binding(tracee, HOST, path)) {
case 0:
return 0;
case 1:
return strlen(path) + 1;
default:
break;
}
}
switch (compare_paths(get_root(tracee), path)) {
case PATH1_IS_PREFIX:
/* Remove the leading part, that is, the "root". */
prefix_length = strlen(get_root(tracee));
/* Special case when path to the guest rootfs == "/". */
if (prefix_length == 1)
prefix_length = 0;
new_length = strlen(path) - prefix_length;
memmove(path, path + prefix_length, new_length);
path[new_length] = '\0';
break;
case PATHS_ARE_EQUAL:
/* Special case when path == root. */
new_length = 1;
strcpy(path, "/");
break;
default:
/* Ensure the path is within the new root. */
if (sanity_check)
return -EPERM;
else
return 0;
}
return new_length + 1;
}
inline bool equal_paths(const fs::path& a, const fs::path& b)
{ return compare_paths(a, b) == 0; }
static struct combine_diff_path *intersect_paths(struct combine_diff_path *curr, int n, int num_parent)
{
struct diff_queue_struct *q = &diff_queued_diff;
struct combine_diff_path *p, **tail = &curr;
int i, cmp;
if (!n) {
for (i = 0; i < q->nr; i++) {
int len;
const char *path;
if (diff_unmodified_pair(q->queue[i]))
continue;
path = q->queue[i]->two->path;
len = strlen(path);
p = xmalloc(combine_diff_path_size(num_parent, len));
p->path = (char *) &(p->parent[num_parent]);
memcpy(p->path, path, len);
p->path[len] = 0;
p->next = NULL;
memset(p->parent, 0,
sizeof(p->parent[0]) * num_parent);
hashcpy(p->oid.hash, q->queue[i]->two->sha1);
p->mode = q->queue[i]->two->mode;
hashcpy(p->parent[n].oid.hash, q->queue[i]->one->sha1);
p->parent[n].mode = q->queue[i]->one->mode;
p->parent[n].status = q->queue[i]->status;
*tail = p;
tail = &p->next;
}
return curr;
}
/*
* paths in curr (linked list) and q->queue[] (array) are
* both sorted in the tree order.
*/
i = 0;
while ((p = *tail) != NULL) {
cmp = ((i >= q->nr)
? -1 : compare_paths(p, q->queue[i]->two));
if (cmp < 0) {
/* p->path not in q->queue[]; drop it */
*tail = p->next;
free(p);
continue;
}
if (cmp > 0) {
/* q->queue[i] not in p->path; skip it */
i++;
continue;
}
hashcpy(p->parent[n].oid.hash, q->queue[i]->one->sha1);
p->parent[n].mode = q->queue[i]->one->mode;
p->parent[n].status = q->queue[i]->status;
tail = &p->next;
i++;
}
return curr;
}
/**
* This function emulates the @result of readlink("@base/@component")
* with respect to @tracee, where @base belongs to "/proc" (according
* to @comparison). This function returns -errno on error, an enum
* @action otherwise (c.f. above).
*
* Unlike readlink(), this function includes the nul terminating byte
* to @result.
*/
Action readlink_proc(const Tracee *tracee, char result[PATH_MAX],
const char base[PATH_MAX], const char component[NAME_MAX],
Comparison comparison)
{
const Tracee *known_tracee;
char proc_path[64]; /* 64 > sizeof("/proc//fd/") + 2 * sizeof(#ULONG_MAX) */
int status;
pid_t pid;
assert(comparison == compare_paths("/proc", base));
/* Remember: comparison = compare_paths("/proc", base) */
switch (comparison) {
case PATHS_ARE_EQUAL:
/* Substitute "/proc/self" with "/proc/<PID>". */
if (strcmp(component, "self") != 0)
return DEFAULT;
status = snprintf(result, PATH_MAX, "/proc/%d", tracee->pid);
if (status < 0 || status >= PATH_MAX)
return -EPERM;
return CANONICALIZE;
case PATH1_IS_PREFIX:
/* Handle "/proc/<PID>" below, where <PID> is process
* monitored by PRoot. */
break;
default:
return DEFAULT;
}
pid = atoi(base + strlen("/proc/"));
if (pid == 0)
return DEFAULT;
known_tracee = get_tracee(pid, false);
if (!known_tracee)
return DEFAULT;
/* Handle links in "/proc/<PID>/". */
status = snprintf(proc_path, sizeof(proc_path), "/proc/%d", pid);
if (status < 0 || status >= sizeof(proc_path))
return -EPERM;
comparison = compare_paths(proc_path, base);
switch (comparison) {
case PATHS_ARE_EQUAL:
#define SUBSTITUTE(name, field) \
do { \
if (strcmp(component, #name) != 0) \
break; \
\
status = strlen(known_tracee->field); \
if (status >= PATH_MAX) \
return -EPERM; \
\
strncpy(result, known_tracee->field, status + 1); \
return CANONICALIZE; \
} while (0)
/* Substitute link "/proc/<PID>/???" with the content
* of tracee->???. */
SUBSTITUTE(exe, exe);
SUBSTITUTE(cwd, fs->cwd);
//SUBSTITUTE(root);
#undef SUBSTITUTE
return DEFAULT;
case PATH1_IS_PREFIX:
/* Handle "/proc/<PID>/???" below. */
break;
default:
return DEFAULT;
}
/* Handle links in "/proc/<PID>/fd/". */
status = snprintf(proc_path, sizeof(proc_path), "/proc/%d/fd", pid);
if (status < 0 || status >= sizeof(proc_path))
return -EPERM;
comparison = compare_paths(proc_path, base);
switch (comparison) {
char *end_ptr;
case PATHS_ARE_EQUAL:
/* Sanity check: a number is expected. */
errno = 0;
(void) strtol(component, &end_ptr, 10);
if (errno != 0 || end_ptr == component)
return -EPERM;
/* Don't dereference "/proc/<PID>/fd/???" now: they
* can point to anonymous pipe, socket, ... otherwise
* they point to a path already canonicalized by the
* kernel.
*
* Note they are still correctly detranslated in
* syscall/exit.c if a monitored process uses
* readlink() against any of them. */
status = snprintf(result, PATH_MAX, "%s/%s", base, component);
if (status < 0 || status >= PATH_MAX)
return -EPERM;
return DONT_CANONICALIZE;
default:
return DEFAULT;
}
return DEFAULT;
}
/**
* Force current @tracee's syscall to behave as if executed by "root".
* This function returns -errno if an error occured, otherwise 0.
*/
static int handle_sysexit_end(Tracee *tracee)
{
word_t sysnum;
sysnum = get_sysnum(tracee, ORIGINAL);
switch (sysnum) {
case PR_chroot: {
char path[PATH_MAX];
word_t result;
word_t input;
int status;
/* Override only permission errors. */
result = peek_reg(tracee, CURRENT, SYSARG_RESULT);
if ((int) result != -EPERM)
return 0;
input = peek_reg(tracee, MODIFIED, SYSARG_1);
status = read_path(tracee, path, input);
if (status < 0)
return status;
/* Only "new rootfs == current rootfs" is supported yet. */
status = compare_paths(get_root(tracee), path);
if (status != PATHS_ARE_EQUAL)
return 0;
/* Force success. */
poke_reg(tracee, SYSARG_RESULT, 0);
return 0;
}
case PR_setresuid:
case PR_setresgid:
case PR_setresuid32:
case PR_setresgid32:
case PR_mknod:
case PR_capset:
case PR_setxattr:
case PR_chmod:
case PR_chown:
case PR_fchmod:
case PR_fchown:
case PR_lchown:
case PR_chown32:
case PR_fchown32:
case PR_lchown32:
case PR_fchmodat:
case PR_fchownat: {
word_t result;
/* Override only permission errors. */
result = peek_reg(tracee, CURRENT, SYSARG_RESULT);
if ((int) result != -EPERM)
return 0;
/* Force success. */
poke_reg(tracee, SYSARG_RESULT, 0);
return 0;
}
case PR_getresuid:
case PR_getresuid32:
case PR_getresgid:
case PR_getresgid32:
poke_mem(tracee, peek_reg(tracee, ORIGINAL, SYSARG_1), 0);
if (errno != 0)
return -EFAULT;
poke_mem(tracee, peek_reg(tracee, ORIGINAL, SYSARG_2), 0);
if (errno != 0)
return -EFAULT;
poke_mem(tracee, peek_reg(tracee, ORIGINAL, SYSARG_3), 0);
if (errno != 0)
return -EFAULT;
/* Force success. */
poke_reg(tracee, SYSARG_RESULT, 0);
return 0;
case PR_fstatat64:
case PR_newfstatat:
case PR_stat64:
case PR_lstat64:
case PR_fstat64:
case PR_stat:
case PR_lstat:
case PR_fstat: {
word_t result;
word_t address;
word_t uid, gid;
Reg sysarg;
/* Override only if it succeed. */
result = peek_reg(tracee, CURRENT, SYSARG_RESULT);
if (result != 0)
return 0;
/* Get the address of the 'stat' structure. */
if (sysnum == PR_fstatat64 || sysnum == PR_newfstatat)
sysarg = SYSARG_3;
else
sysarg = SYSARG_2;
address = peek_reg(tracee, ORIGINAL, sysarg);
/* Get the uid & gid values from the 'stat' structure. */
uid = peek_mem(tracee, address + offsetof_stat_uid(tracee));
if (errno != 0)
uid = 0; /* Not fatal. */
gid = peek_mem(tracee, address + offsetof_stat_gid(tracee));
if (errno != 0)
gid = 0; /* Not fatal. */
/* These values are 32-bit width, even on 64-bit architecture. */
uid &= 0xFFFFFFFF;
gid &= 0xFFFFFFFF;
/* Override only if the file is owned by the current user.
* Errors are not fatal here. */
if (uid == getuid())
poke_mem(tracee, address + offsetof_stat_uid(tracee), 0);
if (gid == getgid())
poke_mem(tracee, address + offsetof_stat_gid(tracee), 0);
return 0;
}
case PR_getuid:
case PR_getgid:
case PR_getegid:
case PR_geteuid:
case PR_getuid32:
case PR_getgid32:
case PR_geteuid32:
case PR_getegid32:
case PR_setuid:
case PR_setgid:
case PR_setfsuid:
case PR_setfsgid:
case PR_setuid32:
case PR_setgid32:
case PR_setfsuid32:
case PR_setfsgid32:
/* Force success. */
poke_reg(tracee, SYSARG_RESULT, 0);
return 0;
default:
return 0;
}
}