Move library source into src sub-directory

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 0 insertions, 304 deletions

diff --git a/lib/tar/read_header.c b/lib/tar/read_header.c
deleted file mode 100644
index ea4873b..0000000
--- a/lib/tar/read_header.c
+++ /dev/null
@@ -1,304 +0,0 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
-/*
- * read_header.c
- *
- * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
- */
-#include "config.h"
-
-#include "internal.h"
-#include <string.h>
-#include <stdlib.h>
-
-static bool is_zero_block(const tar_header_t *hdr)
-{
-	const unsigned char *ptr = (const unsigned char *)hdr;
-
-	return ptr[0] == '\0' && memcmp(ptr, ptr + 1, sizeof(*hdr) - 1) == 0;
-}
-
-static int check_version(const tar_header_t *hdr)
-{
-	char buffer[sizeof(hdr->magic) + sizeof(hdr->version)];
-
-	memset(buffer, '\0', sizeof(buffer));
-	if (memcmp(hdr->magic, buffer, sizeof(hdr->magic)) == 0 &&
-	    memcmp(hdr->version, buffer, sizeof(hdr->version)) == 0)
-		return ETV_V7_UNIX;
-
-	if (memcmp(hdr->magic, TAR_MAGIC, sizeof(hdr->magic)) == 0 &&
-	    memcmp(hdr->version, TAR_VERSION, sizeof(hdr->version)) == 0)
-		return ETV_POSIX;
-
-	if (memcmp(hdr->magic, TAR_MAGIC_OLD, sizeof(hdr->magic)) == 0 &&
-	    memcmp(hdr->version, TAR_VERSION_OLD, sizeof(hdr->version)) == 0)
-		return ETV_PRE_POSIX;
-
-	return ETV_UNKNOWN;
-}
-
-static int decode_header(const tar_header_t *hdr, unsigned int set_by_pax,
-			 tar_header_decoded_t *out, int version)
-{
-	size_t len1, len2;
-	sqfs_u64 field;
-
-	if (!(set_by_pax & PAX_NAME)) {
-		if (hdr->tail.posix.prefix[0] != '\0' &&
-		    version == ETV_POSIX) {
-			len1 = strnlen(hdr->name, sizeof(hdr->name));
-			len2 = strnlen(hdr->tail.posix.prefix,
-				       sizeof(hdr->tail.posix.prefix));
-
-			out->name = malloc(len1 + 1 + len2 + 1);
-
-			if (out->name != NULL) {
-				memcpy(out->name, hdr->tail.posix.prefix, len2);
-				out->name[len2] = '/';
-				memcpy(out->name + len2 + 1, hdr->name, len1);
-				out->name[len1 + 1 + len2] = '\0';
-			}
-		} else {
-			out->name = strndup(hdr->name, sizeof(hdr->name));
-		}
-
-		if (out->name == NULL) {
-			perror("decoding filename");
-			return -1;
-		}
-	}
-
-	if (!(set_by_pax & PAX_SIZE)) {
-		if (read_number(hdr->size, sizeof(hdr->size), &out->record_size))
-			return -1;
-	}
-
-	if (!(set_by_pax & PAX_UID)) {
-		if (read_number(hdr->uid, sizeof(hdr->uid), &field))
-			return -1;
-		out->uid = field;
-	}
-
-	if (!(set_by_pax & PAX_GID)) {
-		if (read_number(hdr->gid, sizeof(hdr->gid), &field))
-			return -1;
-		out->gid = field;
-	}
-
-	if (!(set_by_pax & PAX_DEV_MAJ)) {
-		if (read_number(hdr->devmajor, sizeof(hdr->devmajor), &field))
-			return -1;
-
-		out->devno = makedev(field, minor(out->devno));
-	}
-
-	if (!(set_by_pax & PAX_DEV_MIN)) {
-		if (read_number(hdr->devminor, sizeof(hdr->devminor), &field))
-			return -1;
-
-		out->devno = makedev(major(out->devno), field);
-	}
-
-	if (!(set_by_pax & PAX_MTIME)) {
-		if (read_number(hdr->mtime, sizeof(hdr->mtime), &field))
-			return -1;
-		if (field & 0x8000000000000000UL) {
-			field = ~field + 1;
-			out->mtime = -((sqfs_s64)field);
-		} else {
-			out->mtime = field;
-		}
-	}
-
-	if (read_octal(hdr->mode, sizeof(hdr->mode), &field))
-		return -1;
-
-	out->mode = field & 07777;
-
-	if (hdr->typeflag == TAR_TYPE_LINK ||
-	    hdr->typeflag == TAR_TYPE_SLINK) {
-		if (!(set_by_pax & PAX_SLINK_TARGET)) {
-			out->link_target = strndup(hdr->linkname,
-						   sizeof(hdr->linkname));
-			if (out->link_target == NULL) {
-				perror("decoding symlink target");
-				return -1;
-			}
-		}
-	}
-
-	out->unknown_record = false;
-
-	switch (hdr->typeflag) {
-	case '\0':
-	case TAR_TYPE_FILE:
-	case TAR_TYPE_GNU_SPARSE:
-		out->mode |= S_IFREG;
-		break;
-	case TAR_TYPE_LINK:
-		out->is_hard_link = true;
-		break;
-	case TAR_TYPE_SLINK:
-		out->mode = S_IFLNK | 0777;
-		break;
-	case TAR_TYPE_CHARDEV:
-		out->mode |= S_IFCHR;
-		break;
-	case TAR_TYPE_BLOCKDEV:
-		out->mode |= S_IFBLK;
-		break;
-	case TAR_TYPE_DIR:
-		out->mode |= S_IFDIR;
-		break;
-	case TAR_TYPE_FIFO:
-		out->mode |= S_IFIFO;
-		break;
-	default:
-		out->unknown_record = true;
-		break;
-	}
-
-	return 0;
-}
-
-int read_header(istream_t *fp, tar_header_decoded_t *out)
-{
-	unsigned int set_by_pax = 0;
-	bool prev_was_zero = false;
-	sqfs_u64 pax_size;
-	tar_header_t hdr;
-	int version, ret;
-
-	memset(out, 0, sizeof(*out));
-
-	for (;;) {
-		ret = istream_read(fp, &hdr, sizeof(hdr));
-		if (ret < 0)
-			goto fail;
-
-		if ((size_t)ret < sizeof(hdr))
-			goto out_eof;
-
-		if (is_zero_block(&hdr)) {
-			if (prev_was_zero)
-				goto out_eof;
-			prev_was_zero = true;
-			continue;
-		}
-
-		prev_was_zero = false;
-		version = check_version(&hdr);
-
-		if (version == ETV_UNKNOWN)
-			goto fail_magic;
-
-		if (!is_checksum_valid(&hdr))
-			goto fail_chksum;
-
-		switch (hdr.typeflag) {
-		case TAR_TYPE_GNU_SLINK:
-			if (read_number(hdr.size, sizeof(hdr.size), &pax_size))
-				goto fail;
-			if (pax_size < 1 || pax_size > TAR_MAX_SYMLINK_LEN)
-				goto fail_slink_len;
-			free(out->link_target);
-			out->link_target = record_to_memory(fp, pax_size);
-			if (out->link_target == NULL)
-				goto fail;
-			set_by_pax |= PAX_SLINK_TARGET;
-			continue;
-		case TAR_TYPE_GNU_PATH:
-			if (read_number(hdr.size, sizeof(hdr.size), &pax_size))
-				goto fail;
-			if (pax_size < 1 || pax_size > TAR_MAX_PATH_LEN)
-				goto fail_path_len;
-			free(out->name);
-			out->name = record_to_memory(fp, pax_size);
-			if (out->name == NULL)
-				goto fail;
-			set_by_pax |= PAX_NAME;
-			continue;
-		case TAR_TYPE_PAX_GLOBAL:
-			if (read_number(hdr.size, sizeof(hdr.size), &pax_size))
-				goto fail;
-			skip_entry(fp, pax_size);
-			continue;
-		case TAR_TYPE_PAX:
-			clear_header(out);
-			if (read_number(hdr.size, sizeof(hdr.size), &pax_size))
-				goto fail;
-			if (pax_size < 1 || pax_size > TAR_MAX_PAX_LEN)
-				goto fail_pax_len;
-			set_by_pax = 0;
-			if (read_pax_header(fp, pax_size, &set_by_pax, out))
-				goto fail;
-			continue;
-		case TAR_TYPE_GNU_SPARSE:
-			free_sparse_list(out->sparse);
-			out->sparse = read_gnu_old_sparse(fp, &hdr);
-			if (out->sparse == NULL)
-				goto fail;
-			if (read_number(hdr.tail.gnu.realsize,
-					sizeof(hdr.tail.gnu.realsize),
-					&out->actual_size))
-				goto fail;
-			break;
-		default:
-			break;
-		}
-		break;
-	}
-
-	if (decode_header(&hdr, set_by_pax, out, version))
-		goto fail;
-
-	if (set_by_pax & PAX_SPARSE_GNU_1_X) {
-		free_sparse_list(out->sparse);
-		out->sparse = read_gnu_new_sparse(fp, out);
-		if (out->sparse == NULL)
-			goto fail;
-	}
-
-	if (out->sparse == NULL)
-		out->actual_size = out->record_size;
-
-	return 0;
-out_eof:
-	clear_header(out);
-	return 1;
-fail_slink_len:
-	fprintf(stderr, "rejecting GNU symlink header with size %lu\n",
-		(unsigned long)pax_size);
-	goto fail;
-fail_path_len:
-	fprintf(stderr, "rejecting GNU long path header with size %lu\n",
-		(unsigned long)pax_size);
-	goto fail;
-fail_pax_len:
-	fprintf(stderr, "rejecting PAX header with size %lu\n",
-		(unsigned long)pax_size);
-	goto fail;
-fail_magic:
-	fputs("input is not a ustar tar archive!\n", stderr);
-	goto fail;
-fail_chksum:
-	fputs("invalid tar header checksum!\n", stderr);
-	goto fail;
-fail:
-	clear_header(out);
-	return -1;
-}
-
-int skip_padding(istream_t *fp, sqfs_u64 size)
-{
-	size_t tail = size % 512;
-
-	return tail ? istream_skip(fp, 512 - tail) : 0;
-}
-
-int skip_entry(istream_t *fp, sqfs_u64 size)
-{
-	size_t tail = size % 512;
-
-	return istream_skip(fp, tail ? (size + 512 - tail) : size);
-}