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-rw-r--r--difftool/Makemodule.am2
-rw-r--r--difftool/compare_file.c78
-rw-r--r--difftool/compare_files.c97
-rw-r--r--difftool/compare_files_sqfs.c54
-rw-r--r--difftool/difftool.h2
-rw-r--r--difftool/extract.c4
-rw-r--r--difftool/sqfsdiff.c2
7 files changed, 104 insertions, 135 deletions
diff --git a/difftool/Makemodule.am b/difftool/Makemodule.am
index 8d0a4e7..293143e 100644
--- a/difftool/Makemodule.am
+++ b/difftool/Makemodule.am
@@ -1,6 +1,6 @@
sqfsdiff_SOURCES = difftool/sqfsdiff.c difftool/difftool.h difftool/util.c
sqfsdiff_SOURCES += difftool/compare_dir.c difftool/node_compare.c
-sqfsdiff_SOURCES += difftool/compare_files_sqfs.c difftool/super.c
+sqfsdiff_SOURCES += difftool/compare_files.c difftool/super.c
sqfsdiff_SOURCES += difftool/extract.c
sqfsdiff_LDADD = libsquashfs.a libfstree.a libcompress.a libutil.a
sqfsdiff_LDADD += $(XZ_LIBS) $(ZLIB_LIBS) $(LZO_LIBS) $(LZ4_LIBS) $(ZSTD_LIBS)
diff --git a/difftool/compare_file.c b/difftool/compare_file.c
deleted file mode 100644
index c427f38..0000000
--- a/difftool/compare_file.c
+++ /dev/null
@@ -1,78 +0,0 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
-/*
- * compare_file.c
- *
- * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
- */
-#include "difftool.h"
-
-int compare_files(file_info_t *a, file_info_t *b, const char *path)
-{
- uint64_t offset, size, diff;
- int ret = 0, afd, bfd;
- void *aptr, *bptr;
-
- if (a->size != b->size)
- return 1;
-
- if (pushd(first_path))
- return -1;
- afd = open(path, O_RDONLY);
- if (afd < 0) {
- fprintf(stderr, "%s/%s: %s\n", first_path, path,
- strerror(errno));
- return -1;
- }
- if (popd())
- goto fail_afd;
-
- if (pushd(second_path))
- goto fail_afd;
- bfd = open(path, O_RDONLY);
- if (bfd < 0) {
- fprintf(stderr, "%s/%s: %s\n", second_path, path,
- strerror(errno));
- goto fail_afd;
- }
- if (popd())
- goto fail_bfd;
-
- size = a->size;
-
- for (offset = 0; offset < size; offset += diff) {
- diff = size - offset;
- if (diff > MAX_WINDOW_SIZE)
- diff = MAX_WINDOW_SIZE;
-
- aptr = mmap(NULL, diff, PROT_READ, MAP_SHARED, afd, offset);
- if (aptr == MAP_FAILED) {
- fprintf(stderr, "mmap %s/%s: %s\n", first_path, path,
- strerror(errno));
- goto fail_bfd;
- }
-
- bptr = mmap(NULL, diff, PROT_READ, MAP_SHARED, bfd, offset);
- if (bptr == MAP_FAILED) {
- fprintf(stderr, "mmap %s/%s: %s\n", second_path, path,
- strerror(errno));
- munmap(aptr, diff);
- goto fail_bfd;
- }
-
- ret = memcmp(aptr, bptr, diff);
- munmap(aptr, diff);
- munmap(bptr, diff);
-
- if (ret != 0)
- break;
- }
-
- close(afd);
- close(bfd);
- return ret;
-fail_bfd:
- close(bfd);
-fail_afd:
- close(afd);
- return -1;
-}
diff --git a/difftool/compare_files.c b/difftool/compare_files.c
new file mode 100644
index 0000000..89c5f5c
--- /dev/null
+++ b/difftool/compare_files.c
@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * compare_files.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "difftool.h"
+
+static unsigned char a_buf[MAX_WINDOW_SIZE];
+static unsigned char b_buf[MAX_WINDOW_SIZE];
+
+int compare_files(file_info_t *a, file_info_t *b, const char *path)
+{
+ char second_name[strlen(second_path) + strlen(path) + 2];
+ char first_name[strlen(first_path) + strlen(path) + 2];
+ int afd = -1, bfd = -1, status = 0;
+ uint64_t offset, diff;
+ ssize_t ret;
+
+ if (a->size != b->size)
+ goto out_different;
+
+ if (compare_flags & COMPARE_NO_CONTENTS)
+ return 0;
+
+ if (a_is_dir) {
+ sprintf(first_name, "%s/%s", first_path, path);
+
+ afd = open(first_name, O_RDONLY);
+ if (afd < 0) {
+ perror(first_name);
+ goto fail;
+ }
+ }
+
+ if (b_is_dir) {
+ sprintf(second_name, "%s/%s", second_path, path);
+
+ bfd = open(second_name, O_RDONLY);
+ if (bfd < 0) {
+ perror(second_name);
+ goto fail;
+ }
+ }
+
+ for (offset = 0; offset < a->size; offset += diff) {
+ diff = a->size - offset;
+
+ if (diff > MAX_WINDOW_SIZE)
+ diff = MAX_WINDOW_SIZE;
+
+ if (a_is_dir) {
+ if (read_data_at(first_name, offset, afd, a_buf, diff))
+ goto out;
+ } else {
+ ret = data_reader_read(sqfs_a.data, a, offset,
+ a_buf, diff);
+ if (ret < 0 || (size_t)ret < diff) {
+ fprintf(stderr, "Failed to read %s from %s\n",
+ path, first_path);
+ return -1;
+ }
+ }
+
+ if (b_is_dir) {
+ if (read_data_at(second_name, offset, bfd, b_buf, diff))
+ goto out;
+ } else {
+ ret = data_reader_read(sqfs_b.data, b, offset,
+ b_buf, diff);
+ if (ret < 0 || (size_t)ret < diff) {
+ fprintf(stderr, "Failed to read %s from %s\n",
+ path, second_path);
+ return -1;
+ }
+ }
+
+ if (memcmp(a_buf, b_buf, diff) != 0)
+ goto out_different;
+ }
+out:
+ if (afd >= 0)
+ close(afd);
+ if (bfd >= 0)
+ close(bfd);
+ return status;
+fail:
+ status = -1;
+ goto out;
+out_different:
+ if (compare_flags & COMPARE_EXTRACT_FILES) {
+ if (extract_files(a, b, path))
+ goto fail;
+ }
+ status = 1;
+ goto out;
+}
diff --git a/difftool/compare_files_sqfs.c b/difftool/compare_files_sqfs.c
deleted file mode 100644
index 32b97b1..0000000
--- a/difftool/compare_files_sqfs.c
+++ /dev/null
@@ -1,54 +0,0 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
-/*
- * compare_file_sfqs.c
- *
- * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
- */
-#include "difftool.h"
-
-static unsigned char a_buf[MAX_WINDOW_SIZE];
-static unsigned char b_buf[MAX_WINDOW_SIZE];
-
-int compare_files(file_info_t *a, file_info_t *b, const char *path)
-{
- uint64_t offset, diff;
- ssize_t ret;
-
- if (a->size != b->size)
- goto out_different;
-
- if (compare_flags & COMPARE_NO_CONTENTS)
- return 0;
-
- for (offset = 0; offset < a->size; offset += diff) {
- diff = a->size - offset;
-
- if (diff > MAX_WINDOW_SIZE)
- diff = MAX_WINDOW_SIZE;
-
- ret = data_reader_read(sqfs_a.data, a, offset, a_buf, diff);
- if (ret < 0 || (size_t)ret < diff) {
- fprintf(stderr, "Failed to read %s from %s\n",
- path, first_path);
- return -1;
- }
-
- ret = data_reader_read(sqfs_b.data, b, offset, b_buf, diff);
- if (ret < 0 || (size_t)ret < diff) {
- fprintf(stderr, "Failed to read %s from %s\n",
- path, second_path);
- return -1;
- }
-
- if (memcmp(a_buf, b_buf, diff) != 0)
- goto out_different;
- }
-
- return 0;
-out_different:
- if (compare_flags & COMPARE_EXTRACT_FILES) {
- if (extract_files(a, b, path))
- return -1;
- }
- return 1;
-}
diff --git a/difftool/difftool.h b/difftool/difftool.h
index bd04fd2..56f727a 100644
--- a/difftool/difftool.h
+++ b/difftool/difftool.h
@@ -28,6 +28,8 @@ extern const char *second_path;
extern int compare_flags;
extern sqfs_reader_t sqfs_a;
extern sqfs_reader_t sqfs_b;
+extern bool a_is_dir;
+extern bool b_is_dir;
enum {
COMPARE_NO_PERM = 0x01,
diff --git a/difftool/extract.c b/difftool/extract.c
index 9d84265..9fee46d 100644
--- a/difftool/extract.c
+++ b/difftool/extract.c
@@ -39,12 +39,12 @@ static int extract(data_reader_t *data, file_info_t *fi,
int extract_files(file_info_t *a, file_info_t *b, const char *path)
{
- if (a != NULL) {
+ if (a != NULL && !a_is_dir) {
if (extract(sqfs_a.data, a, path, 'a'))
return -1;
}
- if (b != NULL) {
+ if (b != NULL && !b_is_dir) {
if (extract(sqfs_b.data, b, path, 'b'))
return -1;
}
diff --git a/difftool/sqfsdiff.c b/difftool/sqfsdiff.c
index baebc25..9197430 100644
--- a/difftool/sqfsdiff.c
+++ b/difftool/sqfsdiff.c
@@ -65,6 +65,8 @@ const char *first_path;
const char *second_path;
sqfs_reader_t sqfs_a;
sqfs_reader_t sqfs_b;
+bool a_is_dir;
+bool b_is_dir;
static bool compare_super = false;
static const char *extract_dir;
generated by cgit v1.2.3 (git 2.39.1) at 2025-10-31 18:37:56 +0000