1 files changed, 0 insertions, 158 deletions
diff --git a/src/user/app/init/driver/tar.c b/src/user/app/init/driver/tar.c
deleted file mode 100644
index 60deccd..0000000
--- a/src/user/app/init/driver/tar.c
+++ /dev/null
@@ -1,158 +0,0 @@
-#include <user/lib/stdlib.h>
-#include <shared/flags.h>
-#include <shared/syscalls.h>
-#include <stdint.h>
-
-#define BUF_SIZE 64
-
-static void *tar_open(const char *path, int len, void *base, size_t base_len);
-static void tar_read(struct fs_wait_response *res, void *base, size_t base_len);
-static int tar_size(void *sector);
-static void *tar_find(const char *path, size_t path_len, void *base, size_t base_len);
-static int oct_parse(char *str, size_t len);
-
-
-static const char *root_fakemeta = ""; /* see comment in tar_open */
-
-
-void tar_driver(void *base) {
-	static char buf[BUF_SIZE];
-	struct fs_wait_response res;
-	void *ptr;
-	while (!_syscall_fs_wait(buf, BUF_SIZE, &res)) {
-		switch (res.op) {
-			case VFSOP_OPEN:
-				ptr = tar_open(buf, res.len, base, ~0);
-				_syscall_fs_respond(ptr, ptr ? 0 : -1, 0);
-				break;
-
-			case VFSOP_READ:
-				tar_read(&res, base, ~0);
-				break;
-
-			default:
-				_syscall_fs_respond(NULL, -1, 0); // unsupported
-				break;
-		}
-	}
-	_syscall_exit(0);
-}
-
-static void *tar_open(const char *path, int len, void *base, size_t base_len) {
-	if (len <= 0) return NULL;
-	path += 1; // skip the leading slash
-	len  -= 1;
-
-	/* TAR archives don't (seem to) contain an entry for the root dir, so i'm
-	 * returning a fake one. this isn't a full entry because i'm currently too
-	 * lazy to create a full one - thus, it has to be special cased in tar_read */
-	if (len == 0)
-		return (void*)root_fakemeta;
-
-	return tar_find(path, len, base, base_len);
-}
-
-static void tar_read(struct fs_wait_response *res, void *base, size_t base_len) {
-	void *meta =  (void*)res->id;
-	char  type = *(char*)(meta + 156);
-	size_t meta_len;
-	int size;
-
-	static char buf[BUF_SIZE]; // TODO reuse a single buffer
-	size_t buf_pos = 0;
-
-	if (meta == root_fakemeta) type = '5'; /* see comment in tar_open() */
-
-	switch (type) {
-		case '\0':
-		case '0': /* normal files */
-			size = tar_size(meta);
-			if (res->offset < 0 || res->offset > size) {
-				// TODO support negative offsets
-				_syscall_fs_respond(NULL, -1, 0);
-			} else {
-				_syscall_fs_respond(meta + 512 + res->offset, size - res->offset, 0);
-			}
-			break;
-
-		case '5': /* directory */
-			meta_len = strlen(meta);
-			size_t to_skip = res->offset;
-
-			/* find files in dir */
-			for (size_t off = 0; off < base_len;) {
-				if (0 != memcmp(base + off + 257, "ustar", 5))
-					break; // not a metadata sector
-				// TODO more meaningful variable names and clean code up
-
-				/* check if prefix matches */
-				if (0 == memcmp(base + off, meta, meta_len) &&
-						*(char*)(base + off + meta_len) != '\0') {
-					char *suffix = base + off + meta_len;
-					size_t suffix_len = strlen(suffix);
-
-					/* check if the path contains any non-trailing slashes */
-					char *next = suffix;
-					while (*next && *next != '/') next++;
-					if (*next == '/') next++;
-					if (*next == '\0') {
-						if (to_skip > suffix_len) {
-							to_skip -= suffix_len;
-						} else {
-							suffix += to_skip;
-							suffix_len -= to_skip;
-							to_skip = 0;
-
-							/* it doesn't - so let's add it to the result */
-							memcpy(buf + buf_pos, suffix, suffix_len);
-							buf[buf_pos + suffix_len] = '\0';
-							buf_pos += suffix_len + 1;
-							// TODO no buffer overrun check
-						}
-					}
-				}
-
-				size = tar_size(base + off);
-				off += 512;                 // skip this metadata sector
-				off += (size + 511) & ~511; // skip the data sectors
-			}
-
-			_syscall_fs_respond(buf, buf_pos, 0);
-			break;
-
-		default:
-			_syscall_fs_respond(NULL, -1, 0);
-			break;
-	}
-}
-
-static int tar_size(void *sector) {
-	return oct_parse(sector + 124, 11);
-}
-
-static void *tar_find(const char *path, size_t path_len, void *base, size_t base_len) {
-	int size;
-	if (path_len > 100) return NULL; // illegal path
-
-	for (size_t off = 0; off < base_len;) {
-		if (0 != memcmp(base + off + 257, "ustar", 5))
-			break; // not a metadata sector
-		if (0 == memcmp(base + off, path, path_len) &&
-				*(char*)(base + off + path_len) == '\0')
-			return base + off; // file found, quit
-
-		size = tar_size(base + off);
-		off += 512;                 // skip this metadata sector
-		off += (size + 511) & ~511; // skip the data sectors
-	}
-	return NULL;
-}
-
-static int oct_parse(char *str, size_t len) {
-	int res = 0;
-	for (size_t i = 0; i < len; i++) {
-		res *= 8;
-		res += str[i] - '0'; // no format checking
-	}
-	return res;
-}