Magisk/native/jni/utils/xwrap.cpp
Shaka Huang 3da318b48e
Fix random return value of faccessat() in x86
faccessat() should return 0 when success, but it returns random number with errno == 0 in x86 platform.

It’s a side effect of commit bf80b08b5f when magisk binaries ‘corretly’ linked with library of API16 .. lol

Co-authored-by: John Wu <topjohnwu@gmail.com>
2021-04-04 03:04:09 -07:00

524 lines
12 KiB
C++

#include <sched.h>
#include <unistd.h>
#include <pthread.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <sys/mman.h>
#include <sys/sendfile.h>
#include <sys/ptrace.h>
#include <utils.hpp>
using namespace std;
FILE *xfopen(const char *pathname, const char *mode) {
FILE *fp = fopen(pathname, mode);
if (fp == nullptr) {
PLOGE("fopen: %s", pathname);
}
return fp;
}
FILE *xfdopen(int fd, const char *mode) {
FILE *fp = fdopen(fd, mode);
if (fp == nullptr) {
PLOGE("fopen");
}
return fp;
}
int xopen(const char *pathname, int flags) {
int fd = open(pathname, flags);
if (fd < 0) {
PLOGE("open: %s", pathname);
}
return fd;
}
int xopen(const char *pathname, int flags, mode_t mode) {
int fd = open(pathname, flags, mode);
if (fd < 0) {
PLOGE("open: %s", pathname);
}
return fd;
}
int xopenat(int dirfd, const char *pathname, int flags) {
int fd = openat(dirfd, pathname, flags);
if (fd < 0) {
PLOGE("openat: %s", pathname);
}
return fd;
}
int xopenat(int dirfd, const char *pathname, int flags, mode_t mode) {
int fd = openat(dirfd, pathname, flags, mode);
if (fd < 0) {
PLOGE("openat: %s", pathname);
}
return fd;
}
// Write exact same size as count
ssize_t xwrite(int fd, const void *buf, size_t count) {
size_t write_sz = 0;
ssize_t ret;
do {
ret = write(fd, (byte *) buf + write_sz, count - write_sz);
if (ret < 0) {
if (errno == EINTR)
continue;
PLOGE("write");
return ret;
}
write_sz += ret;
} while (write_sz != count && ret != 0);
if (write_sz != count) {
PLOGE("write (%zu != %zu)", count, write_sz);
}
return write_sz;
}
// Read error other than EOF
ssize_t xread(int fd, void *buf, size_t count) {
int ret = read(fd, buf, count);
if (ret < 0) {
PLOGE("read");
}
return ret;
}
// Read exact same size as count
ssize_t xxread(int fd, void *buf, size_t count) {
size_t read_sz = 0;
ssize_t ret;
do {
ret = read(fd, (byte *) buf + read_sz, count - read_sz);
if (ret < 0) {
if (errno == EINTR)
continue;
PLOGE("read");
return ret;
}
read_sz += ret;
} while (read_sz != count && ret != 0);
if (read_sz != count) {
PLOGE("read (%zu != %zu)", count, read_sz);
}
return read_sz;
}
int xpipe2(int pipefd[2], int flags) {
int ret = pipe2(pipefd, flags);
if (ret < 0) {
PLOGE("pipe2");
}
return ret;
}
int xsetns(int fd, int nstype) {
int ret = setns(fd, nstype);
if (ret < 0) {
PLOGE("setns");
}
return ret;
}
int xunshare(int flags) {
int ret = unshare(flags);
if (ret < 0) {
PLOGE("unshare");
}
return ret;
}
DIR *xopendir(const char *name) {
DIR *d = opendir(name);
if (d == nullptr) {
PLOGE("opendir: %s", name);
}
return d;
}
DIR *xfdopendir(int fd) {
DIR *d = fdopendir(fd);
if (d == nullptr) {
PLOGE("fdopendir");
}
return d;
}
struct dirent *xreaddir(DIR *dirp) {
errno = 0;
for (dirent *e;;) {
e = readdir(dirp);
if (e == nullptr) {
if (errno)
PLOGE("readdir");
return nullptr;
} else if (e->d_name == "."sv || e->d_name == ".."sv) {
// Filter . and .. for users
continue;
}
return e;
}
}
pid_t xsetsid() {
pid_t pid = setsid();
if (pid < 0) {
PLOGE("setsid");
}
return pid;
}
int xsocket(int domain, int type, int protocol) {
int fd = socket(domain, type, protocol);
if (fd < 0) {
PLOGE("socket");
}
return fd;
}
int xbind(int sockfd, const struct sockaddr *addr, socklen_t addrlen) {
int ret = bind(sockfd, addr, addrlen);
if (ret < 0) {
PLOGE("bind");
}
return ret;
}
int xlisten(int sockfd, int backlog) {
int ret = listen(sockfd, backlog);
if (ret < 0) {
PLOGE("listen");
}
return ret;
}
static int accept4_compat(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags) {
int fd = accept(sockfd, addr, addrlen);
if (fd < 0) {
PLOGE("accept");
} else {
if (flags & SOCK_CLOEXEC)
fcntl(fd, F_SETFD, FD_CLOEXEC);
if (flags & SOCK_NONBLOCK) {
int i = fcntl(fd, F_GETFL);
fcntl(fd, F_SETFL, i | O_NONBLOCK);
}
}
return fd;
}
int xaccept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags) {
int fd = accept4(sockfd, addr, addrlen, flags);
if (fd < 0) {
if (errno == ENOSYS)
return accept4_compat(sockfd, addr, addrlen, flags);
PLOGE("accept4");
}
return fd;
}
void *xmalloc(size_t size) {
void *p = malloc(size);
if (p == nullptr) {
PLOGE("malloc");
}
return p;
}
void *xcalloc(size_t nmemb, size_t size) {
void *p = calloc(nmemb, size);
if (p == nullptr) {
PLOGE("calloc");
}
return p;
}
void *xrealloc(void *ptr, size_t size) {
void *p = realloc(ptr, size);
if (p == nullptr) {
PLOGE("realloc");
}
return p;
}
ssize_t xsendmsg(int sockfd, const struct msghdr *msg, int flags) {
int sent = sendmsg(sockfd, msg, flags);
if (sent < 0) {
PLOGE("sendmsg");
}
return sent;
}
ssize_t xrecvmsg(int sockfd, struct msghdr *msg, int flags) {
int rec = recvmsg(sockfd, msg, flags);
if (rec < 0) {
PLOGE("recvmsg");
}
return rec;
}
int xpthread_create(pthread_t *thread, const pthread_attr_t *attr,
void *(*start_routine) (void *), void *arg) {
errno = pthread_create(thread, attr, start_routine, arg);
if (errno) {
PLOGE("pthread_create");
}
return errno;
}
int xaccess(const char *path, int mode) {
int ret = access(path, mode);
if (ret < 0) {
PLOGE("access %s", path);
}
return ret;
}
int xstat(const char *pathname, struct stat *buf) {
int ret = stat(pathname, buf);
if (ret < 0) {
PLOGE("stat %s", pathname);
}
return ret;
}
int xlstat(const char *pathname, struct stat *buf) {
int ret = lstat(pathname, buf);
if (ret < 0) {
PLOGE("lstat %s", pathname);
}
return ret;
}
int xfstat(int fd, struct stat *buf) {
int ret = fstat(fd, buf);
if (ret < 0) {
PLOGE("fstat %d", fd);
}
return ret;
}
int xdup(int fd) {
int ret = dup(fd);
if (ret < 0) {
PLOGE("dup");
}
return ret;
}
int xdup2(int oldfd, int newfd) {
int ret = dup2(oldfd, newfd);
if (ret < 0) {
PLOGE("dup2");
}
return ret;
}
int xdup3(int oldfd, int newfd, int flags) {
int ret = dup3(oldfd, newfd, flags);
if (ret < 0) {
PLOGE("dup3");
}
return ret;
}
ssize_t xreadlink(const char *pathname, char *buf, size_t bufsiz) {
ssize_t ret = readlink(pathname, buf, bufsiz);
if (ret < 0) {
PLOGE("readlink %s", pathname);
} else {
buf[ret] = '\0';
}
return ret;
}
ssize_t xreadlinkat(int dirfd, const char *pathname, char *buf, size_t bufsiz) {
// readlinkat() may fail on x86 platform, returning random value
// instead of number of bytes placed in buf (length of link)
#if defined(__i386__) || defined(__x86_64__)
memset(buf, 0, bufsiz);
ssize_t ret = readlinkat(dirfd, pathname, buf, bufsiz);
if (ret < 0) {
PLOGE("readlinkat %s", pathname);
}
return ret;
#else
ssize_t ret = readlinkat(dirfd, pathname, buf, bufsiz);
if (ret < 0) {
PLOGE("readlinkat %s", pathname);
} else {
buf[ret] = '\0';
}
return ret;
#endif
}
int xfaccessat(int dirfd, const char *pathname) {
int ret = faccessat(dirfd, pathname, F_OK, 0);
if (ret < 0) {
PLOGE("faccessat %s", pathname);
}
#if defined(__i386__) || defined(__x86_64__)
if (ret > 0 && errno == 0) {
LOGD("faccessat success but ret is %d\n", ret);
ret = 0;
}
#endif
return ret;
}
int xsymlink(const char *target, const char *linkpath) {
int ret = symlink(target, linkpath);
if (ret < 0) {
PLOGE("symlink %s->%s", target, linkpath);
}
return ret;
}
int xsymlinkat(const char *target, int newdirfd, const char *linkpath) {
int ret = symlinkat(target, newdirfd, linkpath);
if (ret < 0) {
PLOGE("symlinkat %s->%s", target, linkpath);
}
return ret;
}
int xlinkat(int olddirfd, const char *oldpath, int newdirfd, const char *newpath, int flags) {
int ret = linkat(olddirfd, oldpath, newdirfd, newpath, flags);
if (ret < 0) {
PLOGE("linkat %s->%s", oldpath, newpath);
}
return ret;
}
int xmount(const char *source, const char *target,
const char *filesystemtype, unsigned long mountflags,
const void *data) {
int ret = mount(source, target, filesystemtype, mountflags, data);
if (ret < 0) {
PLOGE("mount %s->%s", source, target);
}
return ret;
}
int xumount(const char *target) {
int ret = umount(target);
if (ret < 0) {
PLOGE("umount %s", target);
}
return ret;
}
int xumount2(const char *target, int flags) {
int ret = umount2(target, flags);
if (ret < 0) {
PLOGE("umount2 %s", target);
}
return ret;
}
int xrename(const char *oldpath, const char *newpath) {
int ret = rename(oldpath, newpath);
if (ret < 0) {
PLOGE("rename %s->%s", oldpath, newpath);
}
return ret;
}
int xmkdir(const char *pathname, mode_t mode) {
int ret = mkdir(pathname, mode);
if (ret < 0 && errno != EEXIST) {
PLOGE("mkdir %s %u", pathname, mode);
}
return ret;
}
int xmkdirs(const char *pathname, mode_t mode) {
int ret = mkdirs(pathname, mode);
if (ret < 0) {
PLOGE("mkdirs %s", pathname);
}
return ret;
}
int xmkdirat(int dirfd, const char *pathname, mode_t mode) {
int ret = mkdirat(dirfd, pathname, mode);
if (ret < 0 && errno != EEXIST) {
PLOGE("mkdirat %s %u", pathname, mode);
}
return ret;
}
void *xmmap(void *addr, size_t length, int prot, int flags,
int fd, off_t offset) {
void *ret = mmap(addr, length, prot, flags, fd, offset);
if (ret == MAP_FAILED) {
PLOGE("mmap");
}
return ret;
}
ssize_t xsendfile(int out_fd, int in_fd, off_t *offset, size_t count) {
ssize_t ret = sendfile(out_fd, in_fd, offset, count);
if (count != ret) {
PLOGE("sendfile");
}
return ret;
}
pid_t xfork() {
int ret = fork();
if (ret < 0) {
PLOGE("fork");
}
return ret;
}
int xpoll(struct pollfd *fds, nfds_t nfds, int timeout) {
int ret = poll(fds, nfds, timeout);
if (ret < 0) {
PLOGE("poll");
}
return ret;
}
int xinotify_init1(int flags) {
int ret = inotify_init1(flags);
if (ret < 0) {
PLOGE("inotify_init1");
}
return ret;
}
char *xrealpath(const char *path, char *resolved_path) {
char buf[PATH_MAX];
char *ret = realpath(path, buf);
if (ret == nullptr) {
PLOGE("xrealpath");
} else {
strcpy(resolved_path, buf);
}
return ret;
}
int xmknod(const char *pathname, mode_t mode, dev_t dev) {
int ret = mknod(pathname, mode, dev);
if (ret < 0) {
PLOGE("mknod");
}
return ret;
}
long xptrace(int request, pid_t pid, void *addr, void *data) {
long ret = ptrace(request, pid, addr, data);
if (ret < 0)
PLOGE("ptrace %d", pid);
return ret;
}