SgObject Sg_AbsolutePath(SgString *path)
{
char buf[PATH_MAX];
char *ret = realpath(Sg_Utf32sToUtf8s(path), buf);
if (ret) {
return Sg_Utf8sToUtf32s(buf, strlen(buf));
}
if (errno == ENOENT) {
/* do some trick here */
if (Sg_AbsolutePathP(path)) return normalise_path(path);
return normalise_path(Sg_BuildPath(Sg_CurrentDirectory(), path));
}
return SG_FALSE;
}
std::string NormalisePath(const std::string &path)
{
std::string result;
result.reserve(path.size());
normalise_path(result, StringRange(path.c_str(), path.size()));
return result;
}
void split_pathname(std::string const& pathname, std::vector<std::string>& output)
{
std::istringstream istr(normalise_path(pathname));
std::string token;
while (std::getline(istr,token,'/'))
output.push_back(token);
}
// Calculates the path of target relative to source.
std::string compute_relative_path(const std::string& source, const std::string& target)
{
//std::cerr << "compute_relative_path(a): " << source << " : " << target << std::endl;
std::string common_part = normalise_path(source);
std::string back;
if(common_part.length() > 1 && common_part[common_part.length()-1] == '/') {
common_part.erase(common_part.length()-1);
}
while(boost::iequals(del_substring_front(target, common_part), target)) {
size_t offs = common_part.rfind('/');
//std::cerr << "compute_relative_path(b2): " << back << " : " << common_part << std::endl;
if(common_part.length() > 1 && offs != std::string::npos) {
common_part.erase(offs);
back = "../" + back;
} else {
break;
}
}
common_part = del_substring_front(target, common_part);
if(common_part.length() == 1) {
common_part = common_part.substr(1);
if(back.empty() == false) {
back.erase(back.length()-1);
}
} else if(common_part.length() > 1 && common_part[0] == '/') {
common_part = common_part.substr(1);
} else {
if(back.empty() == false) {
back.erase(back.length()-1);
}
}
//std::cerr << "compute_relative_path(b): " << back << " : " << common_part << std::endl;
return back + common_part;
}
/* Intersect a userpath aperture with a path. Fill rule applied to aperture
in NZFILL_TYPE, fill type applied to path is filltype. Note that makeconvex
and cliptoall free their argument paths, so only the flattened paths
need to be freed */
Bool path_in_path(PATHLIST *appath, PATHLIST *path, int32 filltype,
Bool *inside)
{
PATHINFO apath, fpath ;
if ( ! appath || ! path) { /* can't be inside a degenerate path */
*inside = FALSE ;
return TRUE ;
}
/* prepare both paths, using filltype for path and NZFILL for aperture */
fl_setflat( theFlatness( theLineStyle(*gstateptr))) ;
if ( ! path_flatten(appath, &apath) ||
! normalise_path(&apath, NZFILL_TYPE, FALSE, FALSE) )
return FALSE ;
if ( ! thePath(apath) ) {
*inside = FALSE ;
return TRUE ;
}
if ( ! path_flatten(path, &fpath) ||
! normalise_path(&fpath, filltype, FALSE, FALSE) ) {
path_free_list(thePath(apath), mm_pool_temp) ;
return FALSE ;
}
if ( ! thePath(fpath) ) {
path_free_list(thePath(apath), mm_pool_temp) ;
*inside = FALSE ;
return TRUE ;
}
/* intersect aperture and path */
if ( ! cliptoall(&apath, &fpath, &apath, FALSE) )
return FALSE ;
if ( thePath(apath) ) {
*inside = TRUE ; /* if it's not degenerate, aperture is painted */
path_free_list(thePath(apath), mm_pool_temp) ;
} else
*inside = FALSE ; /* if clip is degenerate, it's not inside */
return TRUE ;
}
std::string JoinPathBelow(const std::string &base, const std::string &path)
{
if (base.empty())
return path;
if (!path.empty()) {
if ((path[0] == '/') && (base != "/"))
throw std::invalid_argument(path);
else {
std::string result(base);
result.reserve(result.size() + 1 + path.size());
if (result[result.size()-1] != '/')
result += '/';
StringRange rhs(path.c_str(), path.size());
if (path[0] == '/') {
assert(base == "/");
++rhs.begin;
}
normalise_path(result, rhs);
return result;
}
} else
return base;
}
std::pair<file_props_ptr,mach_header_props>
load_mach_file_props(std::string const& mach_file, std::ifstream& mach,
load_props_mach& load_props, std::string& error_message)
{
if (file_size(mach_file) < 4ULL)
{
error_message = NOT_MACH_FILE();
return {};
}
bool const is_file_in_big_endian = false; // MACH file is stored in big-endian by default.
bool const is_it_load_of_root_binary = load_props.root_file() == mach_file;
// We read magic number in order to reconse the file type (is it MACH or not).
uint8_t num_address_bits = 0U;
{
uint32_t const magic = read_bytes_to_int32_t(mach,4U,is_file_in_big_endian);
if (magic == 0xfeedfaceU) // Mach-O 32 bit
num_address_bits = 32U;
else if (magic == 0xfeedfacfU) // Mach-O 64 bit
num_address_bits = 64U;
else if (magic == 0xcafebabeU) // FAT binary
{
error_message = "Mac OS fat binaries are NOT IMPLEMENTED YET!";
return {};
}
else
{
error_message = NOT_MACH_FILE();
return {};
}
}
// Now we read the rest of the header
uint32_t const cpu_type = read_bytes_to_int32_t(mach,4U,is_file_in_big_endian);
//uint32_t const cpu_subtype = read_bytes_to_int32_t(mach,4U,is_file_in_big_endian);
skip_bytes(mach,4U); // We ignore cpu-sub-type.
if ((num_address_bits == 64U && cpu_type != 0x1000007) ||
(num_address_bits == 32U && cpu_type != 0x7) )
{
error_message = "Unsupported processor architecture.";
return {};
}
architecture_t const arch = num_address_bits == 32U ? architecture_t::X86_32 :
architecture_t::X86_64 ;
abi_t const abi = abi_t::DARWIN;
platform_ptr const file_platform{ new platform(arch, abi) };
uint32_t const filetype = read_bytes_to_int32_t(mach,4U,is_file_in_big_endian);
if (filetype != 0x2U && filetype != 0x3U && filetype != 0x6U)
{
error_message = "The loaded Mach-O file is neither executable nor dynamic library.";
return {};
}
bool const is_dynamic_library = filetype == 0x3U || filetype == 0x6U;
bool const is_fixed_dynamic_library = filetype == 0x3U;
uint32_t const num_load_commnads = read_bytes_to_int32_t(mach,4U,is_file_in_big_endian);
if (num_load_commnads == 0U)
{
error_message = "There is no load command in the binary.";
return {};
}
uint32_t const total_num_commnad_bytes = read_bytes_to_int32_t(mach,4U,is_file_in_big_endian);
if (total_num_commnad_bytes < num_load_commnads * (num_address_bits / 8U))
{
error_message = "The list of load commands is too short.";
return {};
}
skip_bytes(mach,4ULL); // We ignore flags.
if (num_address_bits == 64U)
skip_bytes(mach,4ULL); // We skip the reserved word.
if ((uint64_t)mach.tellg() + (uint64_t)total_num_commnad_bytes >= (uint64_t)file_size(mach_file))
{
error_message = "The list of load commands goes beyond the end of the file.";
return {};
}
// Next we create file properties data structure and we return results.
static uint32_t file_id_generator = 0U; // TODO: This is not an ideal implementation: move it to load_props.
file_props_ptr const mach_props { new file_props{
normalise_path(absolute_path(mach_file)),
format::MACH(),
is_file_in_big_endian,
num_address_bits,
++file_id_generator
}};
set_file_property(mach_props->property_map(), file_properties::file_type(),
is_dynamic_library ? file_types::library() : file_types::executable());
load_props.add_file_props(mach_props);
if (is_it_load_of_root_binary)
load_props.set_platform( file_platform );
if (*file_platform != *load_props.platform())
{
error_message = "Incompatible platforms of the executable and its shared library: " + mach_props->path();
return {};
}
return {mach_props,std::make_tuple(num_load_commnads,total_num_commnad_bytes,is_fixed_dynamic_library)};
}
static int do_loadenv(int argc, char *argv[])
{
char *filename = NULL, *dirname;
unsigned flags = 0;
int opt;
int scrub = 0;
int defaultenv = 0;
while ((opt = getopt(argc, argv, "nsd")) > 0) {
switch (opt) {
case 'n':
flags |= ENV_FLAG_NO_OVERWRITE;
break;
case 's':
scrub = 1;
break;
case 'd':
defaultenv = 1;
break;
default:
return COMMAND_ERROR_USAGE;
}
}
if (argc - optind < 2)
dirname = "/env";
else
dirname = argv[optind + 1];
if (argc - optind < 1) {
filename = default_environment_path_get();
} else {
char *str = normalise_path(argv[optind]);
/*
* /dev/defaultenv use to contain the defaultenvironment.
* we do not have this file anymore, but maintain compatibility
* to the 'loadenv -s /dev/defaultenv' command to restore the
* default environment for some time.
*/
if (!strcmp(str, "/dev/defaultenv"))
defaultenv = 1;
else
filename = argv[optind];
free(str);
}
if (scrub) {
int ret;
ret = unlink_recursive(dirname, NULL);
if (ret && ret != -ENOENT) {
eprintf("cannot remove %s: %s\n", dirname,
strerror(-ret));
return 1;
}
ret = mkdir(dirname, 0);
if (ret) {
eprintf("cannot create %s: %s\n", dirname,
strerror(-ret));
return ret;
}
}
printf("loading environment from %s\n", defaultenv ? "defaultenv" : filename);
if (defaultenv)
return defaultenv_load(dirname, flags);
else
return envfs_load(filename, dirname, flags);
}
file_props_ptr load_elf_file_props(std::string const& elf_file, std::ifstream& elf,
load_props_elf& load_props, std::string& error_message)
{
if (file_size(elf_file) < 6ULL)
{
error_message = NOT_ELF_FILE();
return file_props_ptr();
}
char magic[4U];
elf.read(magic,4U);
if (magic[0] != 0x7F ||
magic[1] != 'E' ||
magic[2] != 'L' ||
magic[3] != 'F' )
{
error_message = NOT_ELF_FILE();
return file_props_ptr();
}
elf.seekg(0x05ULL);
uint8_t endian_mode = ::read_byte(elf);
if (endian_mode != 1 && endian_mode != 2)
{
elf.seekg(0x10ULL);
uint32_t const binary_type_little_endian = ::read_bytes_to_uint32_t(elf,2U,false);
elf.seekg(0x10ULL);
uint32_t const binary_type_big_endian = ::read_bytes_to_uint32_t(elf,2U,true);
bool const little_cond = binary_type_little_endian == 2U || binary_type_little_endian == 3U;
bool const big_cond = binary_type_big_endian == 2U || binary_type_big_endian == 3U;
if (little_cond && !big_cond)
{
endian_mode = 1U;
LOAD_ELF_WARNING_IN(
elf_file,
"[Header offset 0x05] Unknown type of endian mode (neither little nor big). "
"The little endian was deduced form 2 bytes at the offset 0x10."
);
}
else if (!little_cond && big_cond)
{
endian_mode = 2U;
LOAD_ELF_WARNING_IN(
elf_file,
"[Header offset 0x05] Unknown type of endian mode (neither little nor big). "
"The big endian was deduced form 2 bytes at the offset 0x10."
);
}
else
{
error_message = "[Header offset 0x05] Unknown type of endian mode (neither little nor big).";
return file_props_ptr();
}
}
bool const is_file_in_big_endian = endian_mode == 1 ? false : true;
elf.seekg(0x04ULL);
uint8_t address_mode = ::read_byte(elf);
if (address_mode != 1 && address_mode != 2)
{
elf.seekg(0x1CULL);
uint32_t const phd_offset_32 = ::read_bytes_to_uint32_t(elf,4U,is_file_in_big_endian);
uint64_t const phd_offset_64 = ::read_bytes_to_uint64_t(elf,8U,is_file_in_big_endian);
bool const cond32 = phd_offset_32 != 0U && phd_offset_32 < file_size(elf_file);
bool const cond64 = phd_offset_64 != 0U && phd_offset_64 < file_size(elf_file);
if (cond32 && !cond64)
{
address_mode = 1U;
LOAD_ELF_WARNING_IN(
elf_file,
"[Header offset 0x04] Unknown type for address mode (neither 32- nor 64-bit). "
"The 32-bit address mode was deduced form the 12 bytes at the offset 0x1c."
);
}
else if (!cond32 && cond64)
{
address_mode = 2U;
LOAD_ELF_WARNING_IN(
elf_file,
"[Header offset 0x04] Unknown type for address mode (neither 32- nor 64-bit). "
"The 64-bit address mode was deduced form the 12 bytes at the offset 0x1c."
);
}
else
{
error_message = "[ELF][Header offset 0x04] Unknown type for address mode (neither 32- nor 64-bit).";
return file_props_ptr();
}
}
bool const file_uses_32_bit_addresses = address_mode == 1 ? true : false;
elf.seekg(0x06ULL);
file_props_ptr const elf_props{ new file_props{
normalise_path(absolute_path(elf_file)),
format::ELF(),
is_file_in_big_endian,
(uint8_t)(file_uses_32_bit_addresses ? 32U : 64U),
load_props.get_fresh_file_id()
}};
set_file_property(elf_props->property_map(), file_properties::abi_loader(), abi_loaders::NONE());
return elf_props;
}
int ls(const char *path, ulong flags)
{
DIR *dir;
struct dirent *d;
char tmp[PATH_MAX];
struct stat s;
struct string_list sl;
string_list_init(&sl);
if (stat(path, &s))
return errno;
if (flags & LS_SHOWARG && s.st_mode & S_IFDIR)
printf("%s:\n", path);
if (!(s.st_mode & S_IFDIR)) {
ls_one(path, &s);
return 0;
}
dir = opendir(path);
if (!dir)
return errno;
while ((d = readdir(dir))) {
sprintf(tmp, "%s/%s", path, d->d_name);
if (stat(tmp, &s))
goto out;
if (flags & LS_COLUMN)
string_list_add_sorted(&sl, d->d_name);
else
ls_one(d->d_name, &s);
}
closedir(dir);
if (flags & LS_COLUMN) {
string_list_print_by_column(&sl);
string_list_free(&sl);
}
if (!(flags & LS_RECURSIVE))
return 0;
dir = opendir(path);
if (!dir) {
errno = -ENOENT;
return -ENOENT;
}
while ((d = readdir(dir))) {
if (!strcmp(d->d_name, "."))
continue;
if (!strcmp(d->d_name, ".."))
continue;
sprintf(tmp, "%s/%s", path, d->d_name);
if (stat(tmp, &s))
goto out;
if (s.st_mode & S_IFDIR) {
char *norm = normalise_path(tmp);
ls(norm, flags);
free(norm);
}
}
out:
closedir(dir);
return 0;
}
