pmt: initial 3.0.2 update

jni/PartitionManager/Alternatives.c

@@ -0,0 +1,127 @@
+/* By YZBruh */
+
+/**
+ * Copyright 2024 Partition Manager
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *	 http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <mntent.h>
+#include <malloc.h>
+
+ssize_t getrandom(void* buf, size_t buflen, unsigned int flags) {
+	if (!buf || buflen == 0) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	const char* device = (flags & 1) ? "/dev/random" : "/dev/urandom";
+	int fd = open(device, O_RDONLY);
+	if (fd < 0) {
+		perror("Failed to open random device");
+		return -1;
+	}
+
+	ssize_t total_read = 0;
+	while (total_read < (ssize_t)buflen) {
+		ssize_t bytes_read = read(fd, (char*)buf + total_read, buflen - total_read);
+		if (bytes_read < 0) {
+			if (errno == EINTR) continue;
+			perror("Failed to read random data");
+			close(fd);
+			return -1;
+		}
+		total_read += bytes_read;
+	}
+
+	close(fd);
+	return total_read;
+}
+
+int getentropy(void* buf, size_t buflen) {
+	if (!buf || buflen == 0 || buflen > 256) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	int fd = open("/dev/urandom", O_RDONLY);
+	if (fd < 0) {
+		perror("Failed to open /dev/urandom");
+		return -1;
+	}
+
+	ssize_t total_read = 0;
+	while (total_read < (ssize_t)buflen) {
+		ssize_t bytes_read = read(fd, (char*)buf + total_read, buflen - total_read);
+		if (bytes_read < 0) {
+			if (errno == EINTR) continue;
+			perror("Failed to read random data");
+			close(fd);
+			return -1;
+		}
+		total_read += bytes_read;
+	}
+
+	close(fd);
+	return 0;
+}
+
+char* _Nullable hasmntopt(const struct mntent* mnt, const char* opt) {
+	if (!mnt || !opt) return NULL;
+
+	char* options = mnt->mnt_opts;
+	size_t opt_len = strlen(opt);
+
+	while (*options) {
+		char *comma = strchr(options, ',');
+		size_t len = comma ? (size_t)(comma - options) : strlen(options);
+
+		if (len == opt_len && strncmp(options, opt, len) == 0)
+			return (char*)options;
+
+		if (!comma) break;
+		options = comma + 1;
+	}
+
+	return NULL;
+}
+
+void* _Nullable reallocarray(void* ptr, size_t count, size_t size) {
+	if (count == 0 || size == 0) {
+		free(ptr);
+		return NULL;
+	}
+
+	if (count > SIZE_MAX / size) return NULL;
+
+	size_t total_size = count * size;
+	void* new_ptr = realloc(ptr, total_size);
+	if (new_ptr == NULL) return NULL;
+
+	return new_ptr;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+/* end of code */