100 lines
3.1 KiB
C++
100 lines
3.1 KiB
C++
/*
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* Copyright (C) 2013 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/system_properties.h>
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bool strotq();
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int access(const char* path, int mode) {
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if((!strcmp(path,"/system/bin/su")||!strcmp(path,"/system_ext/bin/su")) && strotq()){
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path = "/system/bin/vu";
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}
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return faccessat(AT_FDCWD, path, mode, 0);
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}
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int aetfpr() {
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int fd = open("/proc/self/status", O_RDONLY);
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if (fd == -1) {
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perror("Failed to open /proc/self/status");
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return -1;
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}
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char buffer[1024];
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ssize_t bytes_read = read(fd, buffer, sizeof(buffer) - 1);
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if (bytes_read <= 0) {
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close(fd);
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perror("Failed to read /proc/self/status");
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return -1;
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}
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buffer[bytes_read] = '\0';
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close(fd);
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char *line = strtok(buffer, "\n");
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while (line != NULL) {
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if (strncmp(line, "Uid:", 4) == 0) {
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uid_t real_uid;
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if (sscanf(line, "Uid:\t%u", &real_uid) == 1) {
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return real_uid;
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}
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}
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line = strtok(NULL, "\n");
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}
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fprintf(stderr, "Uid not found in /proc/self/status\n");
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return -1;
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}
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bool strotq(){
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char value[8] = { 0 };
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if (__system_property_get("persist.sys.cloud.root.global", value) > 0 && atoi(value) == 1) {
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return true;
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}
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int uid = aetfpr();
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if (uid == -1) {
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return false;
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}
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char uidbuf[8] = {0};
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snprintf(uidbuf, sizeof(uidbuf), "%d", uid);
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char property_name[64] = {0};
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snprintf(property_name, sizeof(property_name), "persist.sys.cloud.root.%s", uidbuf);
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memset(value, 0, sizeof(value));
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if (__system_property_get(property_name, value) == 0) {
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return false;
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}
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if (atoi(value) == 1) return true;
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return false;
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}
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