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Author SHA1 Message Date
664dcfaa89 WIP work on windows support
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Windows support is still WIP.
2024-07-10 19:01:22 +09:00
e315ac5c33 Revise file_format.md
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Specify how symlink paths should be handled if they do not exist (path
size of 0).
2024-07-10 18:59:00 +09:00
2 changed files with 118 additions and 4 deletions

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@ -50,10 +50,16 @@ Following the file-count bytes, the following bytes are added for each file:
4. The fourth byte.
1. Currently unused.
4. If this file is a symbolic link:
1. 2 bytes is 16-bit unsigned integer "link target path" in big-endian. This
does not include the NULL at the end of the string.
2. X bytes of link-target-path (length defined by previous value). Is a
NULL-terminated string.
1. 2 bytes is 16-bit unsigned integer "link target absolute path" in
big-endian. This does not include the NULL at the end of the string.
2. X bytes of link-target-absolute-path (length defined by previous value).
Is a NULL-terminated string. If the previous "size" value is 0, then
this entry does not exist and should be skipped.
3. 2 bytes is 16-bit unsigned integer "link target relative path" in
big-endian. This does not include the NULL at the end of the string.
4. X bytes of link-target-relative-path (length defined by previous value).
Is a NULL-terminated string. If the previous "size" value is 0, then
this entry does not exist and should be skipped.
5. If this file is NOT a symbolic link:
1. 8 bytes 64-bit unsigned integer "size of filename in this archive file".
2. X bytes file data (length defined by previous value).

View file

@ -31,6 +31,12 @@
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#elif SIMPLE_ARCHIVER_PLATFORM == SIMPLE_ARCHIVER_PLATFORM_WINDOWS
#include <fileapi.h>
#include <wchar.h>
#include <windows.h>
#include <winioctl.h>
#include <winnt.h>
#endif
#include "data_structures/hash_map.h"
@ -61,7 +67,11 @@ unsigned int simple_archiver_parser_internal_filename_idx(
} else if ((flags & 3) == 1) {
if (filename[idx] == 0) {
return known_good_idx;
#if SIMPLE_ARCHIVER_PLATFORM != SIMPLE_ARCHIVER_PLATFORM_WINDOWS
} else if (filename[idx] == '/') {
#else
} else if (filename[idx] == '\\') {
#endif
flags |= 2;
} else {
return idx - 1;
@ -69,7 +79,11 @@ unsigned int simple_archiver_parser_internal_filename_idx(
} else if ((flags & 3) == 3) {
if (filename[idx] == 0) {
return known_good_idx;
#if SIMPLE_ARCHIVER_PLATFORM != SIMPLE_ARCHIVER_PLATFORM_WINDOWS
} else if (filename[idx] == '/') {
#else
} else if (filename[idx] == '\\') {
#endif
continue;
} else if (filename[idx] == '.') {
flags &= 0xFFFFFFFC;
@ -103,6 +117,34 @@ void simple_archiver_parser_internal_remove_end_slash(char *filename) {
}
}
char *simple_archiver_internal_forward_to_backward_slash(const char *string) {
unsigned int len = strlen(string) + 1;
char *backward_slash_string = malloc(len);
strncpy(backward_slash_string, string, len);
for (unsigned int idx = 0; idx < len; ++idx) {
if (backward_slash_string[idx] == '/') {
backward_slash_string[idx] = '\\';
}
}
return backward_slash_string;
}
char *simple_archiver_internal_backward_to_forward_slash(const char *string) {
unsigned int len = strlen(string) + 1;
char *forward_slash_string = malloc(len);
strncpy(forward_slash_string, string, len);
for (unsigned int idx = 0; idx < len; ++idx) {
if (forward_slash_string[idx] == '\\') {
forward_slash_string[idx] = '/';
}
}
return forward_slash_string;
}
void simple_archiver_internal_free_file_info_fn(void *data) {
SDArchiverFileInfo *file_info = data;
if (file_info) {
@ -418,6 +460,72 @@ SDArchiverLinkedList *simple_archiver_parsed_to_filenames(
// Unhandled type. TODO handle this.
}
}
#elif SIMPLE_ARCHIVER_PLATFORM == SIMPLE_ARCHIVER_PLATFORM_WINDOWS
for (char **iter = parsed->working_files; iter && *iter; ++iter) {
DWORD file_stats = GetFileAttributesA(*iter);
if (file_stats == INVALID_FILE_ATTRIBUTES) {
printf("Failed to get attributes for %s\n", *iter);
continue;
} else if ((file_stats & FILE_ATTRIBUTE_DIRECTORY) == 0) {
// Is not a directory.
if ((file_stats & FILE_ATTRIBUTE_REPARSE_POINT) == 0) {
// Is not a symbolic link. Is probably a regular file.
printf("%s is probably a regular file.\n", *iter);
} else {
// Check if "reparse point" is a symbolic link.
WIN32_FIND_DATAA find_data;
HANDLE find_handle = FindFirstFileA(*iter, &find_data);
if (find_handle == INVALID_HANDLE_VALUE) {
printf("Unable to verify if %s is a symbolic link!\n", *iter);
continue;
}
printf("Filename in find data structure is \"%s\".\n",
find_data.cFileName);
if (find_data.dwReserved0 != IO_REPARSE_TAG_SYMLINK) {
puts("NOTICE: result of FindFirstFileA does not have symlink tag!");
// printf("%s is not a symbolic link but is a reparse point (tag is
// %#lx).\n", *iter, find_data.dwReserved0);
// FindClose(find_handle);
// continue;
}
FindClose(find_handle);
// Is a symbolic link.
printf("%s is a symbolic link.\n", *iter);
HANDLE symlink_handle =
CreateFileA(*iter, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, FILE_FLAG_OPEN_REPARSE_POINT, NULL);
if (symlink_handle == INVALID_HANDLE_VALUE) {
puts("Failed to get handle on symbolic link!");
continue;
}
REPARSE_GUID_DATA_BUFFER output;
printf("Size of REPARSE_GUID_DATA_BUFFER is %llu\n",
sizeof(REPARSE_GUID_DATA_BUFFER));
DWORD count;
OVERLAPPED overlapped;
if (DeviceIoControl(symlink_handle, FSCTL_GET_REPARSE_POINT, NULL, 0,
&output, sizeof(REPARSE_GUID_DATA_BUFFER), &count,
&overlapped) == 0) {
DWORD error = GetLastError();
printf("Failed to get info on symlink handle (%lu %#lx)!\n", error,
error);
CloseHandle(symlink_handle);
continue;
}
printf("link destination count is %lu.\n", count);
// printf("First bytes:\n %#hhx %#hhx %#hhx %#hhx %#hhx %#hhx %#hhx
// %#hhx\n", output[0], output[1], output[2], output[3], output[4],
// output[5], output[6], output[7]);
// printf("Link to: %s\n", output.SymbolicLinkReparseBuffer.);
CloseHandle(symlink_handle);
}
} else {
// Is a directory.
printf("%s is a directory.\n", *iter);
}
}
#endif
// Remove leading "./" entries from files_list.