aboutsummaryrefslogtreecommitdiff
path: root/lib/sqfs
diff options
context:
space:
mode:
Diffstat (limited to 'lib/sqfs')
-rw-r--r--lib/sqfs/Makemodule.am8
-rw-r--r--lib/sqfs/src/io/dir_rec.c253
-rw-r--r--lib/sqfs/test/rec_dir.c237
3 files changed, 496 insertions, 2 deletions
diff --git a/lib/sqfs/Makemodule.am b/lib/sqfs/Makemodule.am
index 5005c48..053dab8 100644
--- a/lib/sqfs/Makemodule.am
+++ b/lib/sqfs/Makemodule.am
@@ -34,7 +34,8 @@ libsquashfs_la_SOURCES = $(LIBSQFS_HEARDS) lib/sqfs/src/id_table.c \
lib/sqfs/src/frag_table.c lib/sqfs/src/block_writer.c \
lib/sqfs/src/misc.c lib/sqfs/src/io/istream.c \
lib/sqfs/src/io/ostream.c lib/sqfs/src/io/file.c \
- lib/sqfs/src/io/stream_api.c lib/sqfs/src/dir_entry.c
+ lib/sqfs/src/io/stream_api.c lib/sqfs/src/dir_entry.c \
+ lib/sqfs/src/io/dir_rec.c
libsquashfs_la_CPPFLAGS = $(AM_CPPFLAGS)
libsquashfs_la_LDFLAGS = $(AM_LDFLAGS) -version-info $(LIBSQUASHFS_SO_VERSION)
libsquashfs_la_CFLAGS = $(AM_CFLAGS) $(PTHREAD_CFLAGS) $(ZLIB_CFLAGS)
@@ -136,9 +137,12 @@ test_istream_skip_LDADD = libsquashfs.la libio.a libutil.a libcompat.a
test_stream_splice_SOURCES = lib/sqfs/test/stream_splice.c
test_stream_splice_LDADD = libsquashfs.la libio.a libutil.a libcompat.a
+test_rec_dir_SOURCES = lib/sqfs/test/rec_dir.c
+test_rec_dir_LDADD = libsquashfs.la libio.a libutil.a libcompat.a
+
LIBSQFS_TESTS = \
test_abi test_xattr test_table test_xattr_writer test_get_node_path \
- test_istream_read test_istream_skip test_stream_splice
+ test_istream_read test_istream_skip test_stream_splice test_rec_dir
noinst_PROGRAMS += xattr_benchmark
check_PROGRAMS += $(LIBSQFS_TESTS)
diff --git a/lib/sqfs/src/io/dir_rec.c b/lib/sqfs/src/io/dir_rec.c
new file mode 100644
index 0000000..a5d53af
--- /dev/null
+++ b/lib/sqfs/src/io/dir_rec.c
@@ -0,0 +1,253 @@
+/* SPDX-License-Identifier: LGPL-3.0-or-later */
+/*
+ * dir_rec.c
+ *
+ * Copyright (C) 2023 David Oberhollenzer <goliath@infraroot.at>
+ */
+#define SQFS_BUILDING_DLL
+#include "config.h"
+
+#include "util/util.h"
+#include "sqfs/dir_entry.h"
+#include "sqfs/error.h"
+#include "sqfs/io.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+typedef struct dir_stack_t {
+ struct dir_stack_t *next;
+ sqfs_dir_iterator_t *dir;
+ char name[];
+} dir_stack_t;
+
+typedef struct {
+ sqfs_dir_iterator_t base;
+
+ int state;
+ dir_stack_t *top;
+
+ dir_stack_t *next_top;
+} dir_tree_iterator_t;
+
+static void pop(dir_tree_iterator_t *it)
+{
+ if (it->top != NULL) {
+ dir_stack_t *ent = it->top;
+ it->top = it->top->next;
+
+ sqfs_drop(ent->dir);
+ free(ent);
+ }
+}
+
+static sqfs_dir_entry_t *expand_path(const dir_tree_iterator_t *it,
+ sqfs_dir_entry_t *ent)
+{
+ size_t slen = strlen(ent->name) + 1, plen = 0;
+ char *dst;
+ void *new;
+
+ for (dir_stack_t *sit = it->top; sit != NULL; sit = sit->next) {
+ if (sit->name[0] != '\0')
+ plen += strlen(sit->name) + 1;
+ }
+
+ if (plen == 0)
+ return ent;
+
+ new = realloc(ent, sizeof(*ent) + plen + slen);
+ if (new == NULL) {
+ free(ent);
+ return NULL;
+ }
+
+ ent = new;
+ memmove(ent->name + plen, ent->name, slen);
+ dst = ent->name + plen;
+
+ for (dir_stack_t *sit = it->top; sit != NULL; sit = sit->next) {
+ size_t len = strlen(sit->name);
+ if (len > 0) {
+ *(--dst) = '/';
+ dst -= len;
+ memcpy(dst, sit->name, len);
+ }
+ }
+
+ return ent;
+}
+
+/*****************************************************************************/
+
+static void destroy(sqfs_object_t *obj)
+{
+ dir_tree_iterator_t *it = (dir_tree_iterator_t *)obj;
+
+ while (it->top != NULL)
+ pop(it);
+
+ if (it->next_top != NULL) {
+ sqfs_drop(it->next_top->dir);
+ free(it->next_top);
+ }
+
+ free(it);
+}
+
+static int next(sqfs_dir_iterator_t *base, sqfs_dir_entry_t **out)
+{
+ dir_tree_iterator_t *it = (dir_tree_iterator_t *)base;
+ sqfs_dir_entry_t *ent = NULL;
+ int ret;
+
+ *out = NULL;
+ if (it->state != 0)
+ return it->state;
+
+ if (it->next_top != NULL) {
+ it->next_top->next = it->top;
+ it->top = it->next_top;
+ it->next_top = NULL;
+ }
+
+ for (;;) {
+ if (it->top == NULL) {
+ ret = 1;
+ goto fail;
+ }
+
+ ret = it->top->dir->next(it->top->dir, &ent);
+ if (ret < 0)
+ goto fail;
+
+ if (ret > 0) {
+ pop(it);
+ continue;
+ }
+
+ if (!strcmp(ent->name, ".") || !strcmp(ent->name, "..")) {
+ free(ent);
+ ent = NULL;
+ continue;
+ }
+
+ break;
+ }
+
+ ent = expand_path(it, ent);
+ if (ent == NULL) {
+ it->state = SQFS_ERROR_ALLOC;
+ return it->state;
+ }
+
+ if (S_ISDIR(ent->mode)) {
+ sqfs_dir_iterator_t *sub = NULL;
+ const char *name = strrchr(ent->name, '/');
+ name = (name == NULL) ? ent->name : (name + 1);
+
+ ret = it->top->dir->open_subdir(it->top->dir, &sub);
+ if (ret != 0)
+ goto fail;
+
+ it->next_top = alloc_flex(sizeof(*(it->next_top)), 1,
+ strlen(name) + 1);
+ if (it->next_top == NULL) {
+ sqfs_drop(sub);
+ goto fail;
+ }
+
+ strcpy(it->next_top->name, name);
+ it->next_top->dir = sub;
+ }
+
+ *out = ent;
+ return it->state;
+fail:
+ free(ent);
+ it->state = ret;
+ return it->state;
+}
+
+static int read_link(sqfs_dir_iterator_t *base, char **out)
+{
+ dir_tree_iterator_t *it = (dir_tree_iterator_t *)base;
+
+ *out = NULL;
+ if (it->top == NULL)
+ return SQFS_ERROR_NO_ENTRY;
+
+ return it->top->dir->read_link(it->top->dir, out);
+}
+
+static int open_subdir(sqfs_dir_iterator_t *base, sqfs_dir_iterator_t **out)
+{
+ dir_tree_iterator_t *it = (dir_tree_iterator_t *)base;
+
+ *out = NULL;
+ if (it->top == NULL)
+ return SQFS_ERROR_NO_ENTRY;
+
+ return it->top->dir->open_subdir(it->top->dir, out);
+}
+
+static void ignore_subdir(sqfs_dir_iterator_t *base)
+{
+ dir_tree_iterator_t *it = (dir_tree_iterator_t *)base;
+
+ if (it->next_top != NULL) {
+ sqfs_drop(it->next_top->dir);
+ free(it->next_top);
+ it->next_top = NULL;
+ }
+}
+
+static int open_file_ro(sqfs_dir_iterator_t *base, sqfs_istream_t **out)
+{
+ dir_tree_iterator_t *it = (dir_tree_iterator_t *)base;
+
+ *out = NULL;
+ if (it->top == NULL)
+ return SQFS_ERROR_NO_ENTRY;
+
+ return it->top->dir->open_file_ro(it->top->dir, out);
+}
+
+static int read_xattr(sqfs_dir_iterator_t *base, sqfs_xattr_t **out)
+{
+ dir_tree_iterator_t *it = (dir_tree_iterator_t *)base;
+
+ *out = NULL;
+ if (it->top == NULL)
+ return SQFS_ERROR_NO_ENTRY;
+
+ return it->top->dir->read_xattr(it->top->dir, out);
+}
+
+int sqfs_dir_iterator_create_recursive(sqfs_dir_iterator_t **out,
+ sqfs_dir_iterator_t *base)
+{
+ dir_tree_iterator_t *it = calloc(1, sizeof(*it));
+
+ *out = NULL;
+ if (it == NULL)
+ return SQFS_ERROR_ALLOC;
+
+ it->next_top = calloc(1, sizeof(*(it->next_top)) + 1);
+ if (it->next_top == NULL) {
+ free(it);
+ return SQFS_ERROR_ALLOC;
+ }
+ it->next_top->dir = sqfs_grab(base);
+
+ sqfs_object_init(it, destroy, NULL);
+ ((sqfs_dir_iterator_t *)it)->next = next;
+ ((sqfs_dir_iterator_t *)it)->read_link = read_link;
+ ((sqfs_dir_iterator_t *)it)->open_subdir = open_subdir;
+ ((sqfs_dir_iterator_t *)it)->ignore_subdir = ignore_subdir;
+ ((sqfs_dir_iterator_t *)it)->open_file_ro = open_file_ro;
+ ((sqfs_dir_iterator_t *)it)->read_xattr = read_xattr;
+
+ *out = (sqfs_dir_iterator_t *)it;
+ return 0;
+}
diff --git a/lib/sqfs/test/rec_dir.c b/lib/sqfs/test/rec_dir.c
new file mode 100644
index 0000000..00e38aa
--- /dev/null
+++ b/lib/sqfs/test/rec_dir.c
@@ -0,0 +1,237 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * rec_dir.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "config.h"
+
+#include "util/test.h"
+#include "sqfs/dir_entry.h"
+#include "sqfs/inode.h"
+#include "sqfs/io.h"
+#include "compat.h"
+
+typedef struct {
+ sqfs_dir_iterator_t obj;
+
+ bool current_is_dir;
+ size_t level;
+ size_t idx;
+} dummy_it_t;
+
+static int dummy_read_link(sqfs_dir_iterator_t *it, char **out)
+{
+ (void)it; (void)out;
+ TEST_ASSERT(0);
+ return 0;
+}
+
+static void dummy_ignore_subdir(sqfs_dir_iterator_t *it)
+{
+ (void)it;
+ TEST_ASSERT(0);
+}
+
+static int dummy_open_file_ro(sqfs_dir_iterator_t *it, sqfs_istream_t **out)
+{
+ (void)it; (void)out;
+ TEST_ASSERT(0);
+ return 0;
+}
+
+static int dummy_read_xattr(sqfs_dir_iterator_t *it, sqfs_xattr_t **out)
+{
+ (void)it; (void)out;
+ TEST_ASSERT(0);
+ return 0;
+}
+
+static void destroy(sqfs_object_t *obj)
+{
+ free(obj);
+}
+
+static int dummy_next(sqfs_dir_iterator_t *base, sqfs_dir_entry_t **out)
+{
+ dummy_it_t *it = (dummy_it_t *)base;
+ char buffer[3];
+
+ *out = NULL;
+ if (it->idx >= 4)
+ return 1;
+
+ buffer[0] = 'a' + it->idx;
+ buffer[1] = 'A' + it->idx;
+ buffer[2] = '\0';
+
+ if ((it->idx % 2) != 0 && it->level < 2) {
+ *out = sqfs_dir_entry_create(buffer,
+ SQFS_INODE_MODE_DIR | 0755, 0);
+ it->current_is_dir = true;
+ } else {
+ *out = sqfs_dir_entry_create(buffer,
+ SQFS_INODE_MODE_REG | 0644, 0);
+ it->current_is_dir = false;
+ }
+
+ it->idx += 1;
+ TEST_NOT_NULL((*out));
+ return 0;
+}
+
+static int dummy_open_subdir(sqfs_dir_iterator_t *base,
+ sqfs_dir_iterator_t **out)
+{
+ dummy_it_t *it = (dummy_it_t *)base, *sub;
+
+ TEST_ASSERT(it->current_is_dir);
+
+ sub = calloc(1, sizeof(*sub));
+ TEST_NOT_NULL(sub);
+ sub->level = it->level + 1;
+
+ sqfs_object_init(sub, destroy, NULL);
+ ((sqfs_dir_iterator_t *)sub)->read_link = dummy_read_link;
+ ((sqfs_dir_iterator_t *)sub)->ignore_subdir = dummy_ignore_subdir;
+ ((sqfs_dir_iterator_t *)sub)->open_file_ro = dummy_open_file_ro;
+ ((sqfs_dir_iterator_t *)sub)->read_xattr = dummy_read_xattr;
+ ((sqfs_dir_iterator_t *)sub)->next = dummy_next;
+ ((sqfs_dir_iterator_t *)sub)->open_subdir = dummy_open_subdir;
+
+ *out = (sqfs_dir_iterator_t *)sub;
+ return 0;
+}
+
+static sqfs_dir_iterator_t *mkdummyit(void)
+{
+ dummy_it_t *it = calloc(1, sizeof(*it));
+ TEST_NOT_NULL(it);
+
+ sqfs_object_init(it, destroy, NULL);
+ ((sqfs_dir_iterator_t *)it)->read_link = dummy_read_link;
+ ((sqfs_dir_iterator_t *)it)->ignore_subdir = dummy_ignore_subdir;
+ ((sqfs_dir_iterator_t *)it)->open_file_ro = dummy_open_file_ro;
+ ((sqfs_dir_iterator_t *)it)->read_xattr = dummy_read_xattr;
+ ((sqfs_dir_iterator_t *)it)->next = dummy_next;
+ ((sqfs_dir_iterator_t *)it)->open_subdir = dummy_open_subdir;
+ return (sqfs_dir_iterator_t *)it;
+}
+
+static const struct {
+ const char *name;
+ bool isdir;
+} expect[] = {
+ { "aA", false },
+ { "bB", true },
+ { "bB/aA", false },
+ { "bB/bB", true },
+ { "bB/bB/aA", false },
+ { "bB/bB/bB", false },
+ { "bB/bB/cC", false },
+ { "bB/bB/dD", false },
+ { "bB/cC", false },
+ { "bB/dD", true },
+ { "bB/dD/aA", false },
+ { "bB/dD/bB", false },
+ { "bB/dD/cC", false },
+ { "bB/dD/dD", false },
+ { "cC", false },
+ { "dD", true },
+ { "dD/aA", false },
+ { "dD/bB", true },
+ { "dD/bB/aA", false },
+ { "dD/bB/bB", false },
+ { "dD/bB/cC", false },
+ { "dD/bB/dD", false },
+ { "dD/cC", false },
+ { "dD/dD", true },
+ { "dD/dD/aA", false },
+ { "dD/dD/bB", false },
+ { "dD/dD/cC", false },
+ { "dD/dD/dD", false },
+};
+
+int main(int argc, char **argv)
+{
+ sqfs_dir_iterator_t *it, *rec;
+ sqfs_dir_entry_t *ent;
+ int ret;
+ (void)argc; (void)argv;
+
+ /* simple test of the dummy iterator */
+ it = mkdummyit();
+
+ ret = it->next(it, &ent);
+ TEST_EQUAL_I(ret, 0);
+ TEST_STR_EQUAL(ent->name, "aA");
+ TEST_ASSERT(S_ISREG(ent->mode));
+ free(ent);
+
+ ret = it->next(it, &ent);
+ TEST_EQUAL_I(ret, 0);
+ TEST_STR_EQUAL(ent->name, "bB");
+ TEST_ASSERT(S_ISDIR(ent->mode));
+ free(ent);
+
+ ret = it->next(it, &ent);
+ TEST_EQUAL_I(ret, 0);
+ TEST_STR_EQUAL(ent->name, "cC");
+ TEST_ASSERT(S_ISREG(ent->mode));
+ free(ent);
+
+ ret = it->next(it, &ent);
+ TEST_EQUAL_I(ret, 0);
+ TEST_STR_EQUAL(ent->name, "dD");
+ TEST_ASSERT(S_ISDIR(ent->mode));
+ free(ent);
+
+ ret = it->next(it, &ent);
+ TEST_EQUAL_I(ret, 1);
+ TEST_NULL(ent);
+
+ sqfs_drop(it);
+
+ /* construct recursive iterator */
+ it = mkdummyit();
+
+ ret = sqfs_dir_iterator_create_recursive(&rec, it);
+ sqfs_drop(it);
+ TEST_EQUAL_I(ret, 0);
+ TEST_NOT_NULL(rec);
+ it = rec;
+
+ for (size_t i = 0; i < sizeof(expect) / sizeof(expect[0]); ++i) {
+ ret = it->next(it, &ent);
+ TEST_EQUAL_I(ret, 0);
+
+ if (strcmp(ent->name, expect[i].name) != 0) {
+ fprintf(stderr,
+ "Entry %u should be `%s`, but is `%s`\n",
+ (unsigned int)i, expect[i].name, ent->name);
+ return EXIT_FAILURE;
+ }
+
+ if (expect[i].isdir && !S_ISDIR(ent->mode)) {
+ fprintf(stderr,
+ "Entry %u (`%s`) should be dir: "
+ "mode is `%u`\n",
+ (unsigned int)i, ent->name, ent->mode);
+ return EXIT_FAILURE;
+ } else if (!expect[i].isdir && !S_ISREG(ent->mode)) {
+ fprintf(stderr,
+ "Entry %u (`%s`) should be file: "
+ "mode is `%u`\n",
+ (unsigned int)i, ent->name, ent->mode);
+ return EXIT_FAILURE;
+ }
+
+ free(ent);
+ }
+
+ ret = it->next(it, &ent);
+ TEST_EQUAL_I(ret, 1);
+
+ sqfs_drop(it);
+ return EXIT_SUCCESS;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 19:42:50 +0000