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Diffstat (limited to 'lib/util/src/unix_dir_iterator.c')
-rw-r--r--lib/util/src/unix_dir_iterator.c204
1 files changed, 0 insertions, 204 deletions
diff --git a/lib/util/src/unix_dir_iterator.c b/lib/util/src/unix_dir_iterator.c
deleted file mode 100644
index 87cf516..0000000
--- a/lib/util/src/unix_dir_iterator.c
+++ /dev/null
@@ -1,204 +0,0 @@
-/* SPDX-License-Identifier: LGPL-3.0-or-later */
-/*
- * unix_dir_iterator.c
- *
- * Copyright (C) 2023 David Oberhollenzer <goliath@infraroot.at>
- */
-#include "config.h"
-#include "util/dir_iterator.h"
-#include "util/util.h"
-#include "sqfs/error.h"
-
-#include <sys/stat.h>
-#include <stdlib.h>
-#include <dirent.h>
-#include <string.h>
-#include <errno.h>
-
-typedef struct {
- dir_iterator_t base;
-
- struct dirent *ent;
- struct stat sb;
- int state;
- DIR *dir;
-} unix_dir_iterator_t;
-
-static void dir_destroy(sqfs_object_t *obj)
-{
- unix_dir_iterator_t *it = (unix_dir_iterator_t *)obj;
-
- closedir(it->dir);
- free(it);
-}
-
-static int dir_read_link(dir_iterator_t *base, char **out)
-{
- unix_dir_iterator_t *it = (unix_dir_iterator_t *)base;
- ssize_t ret;
- size_t size;
- char *str;
-
- *out = NULL;
-
- if (it->state < 0)
- return it->state;
-
- if (it->state > 0 || it->ent == NULL)
- return SQFS_ERROR_NO_ENTRY;
-
- if ((sizeof(it->sb.st_size) > sizeof(size_t)) &&
- it->sb.st_size > SIZE_MAX) {
- return SQFS_ERROR_ALLOC;
- }
-
- if (SZ_ADD_OV((size_t)it->sb.st_size, 1, &size))
- return SQFS_ERROR_ALLOC;
-
- str = calloc(1, size);
- if (str == NULL)
- return SQFS_ERROR_ALLOC;
-
- ret = readlinkat(dirfd(it->dir), it->ent->d_name,
- str, (size_t)it->sb.st_size);
- if (ret < 0) {
- free(str);
- return SQFS_ERROR_IO;
- }
-
- str[ret] = '\0';
-
- *out = str;
- return 0;
-}
-
-static int dir_next(dir_iterator_t *base, dir_entry_t **out)
-{
- unix_dir_iterator_t *it = (unix_dir_iterator_t *)base;
- dir_entry_t *decoded;
- size_t len;
-
- *out = NULL;
- if (it->state != 0)
- return it->state;
-
- errno = 0;
- it->ent = readdir(it->dir);
-
- if (it->ent == NULL) {
- if (errno != 0) {
- it->state = SQFS_ERROR_IO;
- } else {
- it->state = 1;
- }
-
- return it->state;
- }
-
- if (fstatat(dirfd(it->dir), it->ent->d_name,
- &it->sb, AT_SYMLINK_NOFOLLOW)) {
- it->state = SQFS_ERROR_IO;
- return it->state;
- }
-
- len = strlen(it->ent->d_name);
-
- decoded = alloc_flex(sizeof(*decoded), 1, len + 1);
- if (decoded == NULL) {
- it->state = SQFS_ERROR_ALLOC;
- return it->state;
- }
-
- memcpy(decoded->name, it->ent->d_name, len);
- decoded->mtime = it->sb.st_mtime;
- decoded->dev = it->sb.st_dev;
- decoded->rdev = it->sb.st_rdev;
- decoded->uid = it->sb.st_uid;
- decoded->gid = it->sb.st_gid;
- decoded->mode = it->sb.st_mode;
-
- *out = decoded;
- return it->state;
-}
-
-static int dir_open_subdir(dir_iterator_t *base, dir_iterator_t **out)
-{
- const unix_dir_iterator_t *it = (const unix_dir_iterator_t *)base;
- unix_dir_iterator_t *sub = NULL;
- int fd;
-
- *out = NULL;
-
- if (it->state < 0)
- return it->state;
-
- if (it->state > 0 || it->ent == NULL)
- return SQFS_ERROR_NO_ENTRY;
-
- fd = openat(dirfd(it->dir), it->ent->d_name, O_RDONLY | O_DIRECTORY);
- if (fd < 0) {
- if (errno == ENOTDIR)
- return SQFS_ERROR_NOT_DIR;
- return SQFS_ERROR_IO;
- }
-
- sub = calloc(1, sizeof(*sub));
- if (sub == NULL)
- goto fail_alloc;
-
- sub->dir = fdopendir(fd);
- if (sub->dir == NULL)
- goto fail_alloc;
-
- if (fstat(dirfd(sub->dir), &sub->sb)) {
- free(sub);
- return SQFS_ERROR_IO;
- }
-
- sqfs_object_init(sub, dir_destroy, NULL);
- ((dir_iterator_t *)sub)->dev = sub->sb.st_dev;
- ((dir_iterator_t *)sub)->next = dir_next;
- ((dir_iterator_t *)sub)->read_link = dir_read_link;
- ((dir_iterator_t *)sub)->open_subdir = dir_open_subdir;
-
- *out = (dir_iterator_t *)sub;
- return 0;
-fail_alloc:
- free(sub);
- close(fd);
- return SQFS_ERROR_ALLOC;
-}
-
-dir_iterator_t *dir_iterator_create(const char *path)
-{
- unix_dir_iterator_t *it = calloc(1, sizeof(*it));
-
- if (it == NULL) {
- perror(path);
- return NULL;
- }
-
- it->state = 0;
- it->dir = opendir(path);
-
- if (it->dir == NULL) {
- perror(path);
- free(it);
- return NULL;
- }
-
- if (fstat(dirfd(it->dir), &it->sb)) {
- perror(path);
- closedir(it->dir);
- free(it);
- return NULL;
- }
-
- sqfs_object_init(it, dir_destroy, NULL);
- ((dir_iterator_t *)it)->dev = it->sb.st_dev;
- ((dir_iterator_t *)it)->next = dir_next;
- ((dir_iterator_t *)it)->read_link = dir_read_link;
- ((dir_iterator_t *)it)->open_subdir = dir_open_subdir;
-
- return (dir_iterator_t *)it;
-}