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d8cd2031c7
Shut down any UID matching process and resume if it turns out not to be our target. Since we will record every single process we have ever paused, this means that the same process will not be paused erroneously for another time. This is an optimization to hijack the app as soon as possible.
238 lines
7.1 KiB
C++
238 lines
7.1 KiB
C++
/* util.h - Header for all utility functions
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*/
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#pragma once
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#include <stdio.h>
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#include <dirent.h>
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#include <pthread.h>
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#include <poll.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define UID_SHELL (get_shell_uid())
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#define UID_ROOT 0
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// xwrap.cpp
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FILE *xfopen(const char *pathname, const char *mode);
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FILE *xfdopen(int fd, const char *mode);
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#define GET_MACRO(_1, _2, _3, NAME, ...) NAME
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#define xopen(...) GET_MACRO(__VA_ARGS__, xopen3, xopen2)(__VA_ARGS__)
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int xopen2(const char *pathname, int flags);
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int xopen3(const char *pathname, int flags, mode_t mode);
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int xopenat(int dirfd, const char *pathname, int flags);
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ssize_t xwrite(int fd, const void *buf, size_t count);
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ssize_t xread(int fd, void *buf, size_t count);
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ssize_t xxread(int fd, void *buf, size_t count);
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int xpipe2(int pipefd[2], int flags);
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int xsetns(int fd, int nstype);
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int xunshare(int flags);
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DIR *xopendir(const char *name);
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DIR *xfdopendir(int fd);
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struct dirent *xreaddir(DIR *dirp);
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pid_t xsetsid();
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int xsocket(int domain, int type, int protocol);
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int xbind(int sockfd, const struct sockaddr *addr, socklen_t addrlen);
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int xconnect(int sockfd, const struct sockaddr *addr, socklen_t addrlen);
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int xlisten(int sockfd, int backlog);
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int xaccept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags);
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void *xmalloc(size_t size);
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void *xcalloc(size_t nmemb, size_t size);
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void *xrealloc(void *ptr, size_t size);
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ssize_t xsendmsg(int sockfd, const struct msghdr *msg, int flags);
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ssize_t xrecvmsg(int sockfd, struct msghdr *msg, int flags);
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int xpthread_create(pthread_t *thread, const pthread_attr_t *attr,
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void *(*start_routine) (void *), void *arg);
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int xstat(const char *pathname, struct stat *buf);
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int xlstat(const char *pathname, struct stat *buf);
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int xdup2(int oldfd, int newfd);
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int xdup3(int oldfd, int newfd, int flags);
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ssize_t xreadlink(const char *pathname, char *buf, size_t bufsiz);
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ssize_t xreadlinkat(int dirfd, const char *pathname, char *buf, size_t bufsiz);
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int xsymlink(const char *target, const char *linkpath);
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int xsymlinkat(const char *target, int newdirfd, const char *linkpath);
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int xlinkat(int olddirfd, const char *oldpath, int newdirfd, const char *newpath, int flags);
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int xmount(const char *source, const char *target,
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const char *filesystemtype, unsigned long mountflags,
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const void *data);
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int xumount(const char *target);
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int xumount2(const char *target, int flags);
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int xrename(const char *oldpath, const char *newpath);
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int xmkdir(const char *pathname, mode_t mode);
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int xmkdirs(const char *pathname, mode_t mode);
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int xmkdirat(int dirfd, const char *pathname, mode_t mode);
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void *xmmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset);
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ssize_t xsendfile(int out_fd, int in_fd, off_t *offset, size_t count);
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pid_t xfork();
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int xpoll(struct pollfd *fds, nfds_t nfds, int timeout);
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int xinotify_init1(int flags);
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// misc.cpp
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unsigned get_shell_uid();
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int fork_dont_care();
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int fork_no_zombie();
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void gen_rand_str(char *buf, int len);
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int strend(const char *s1, const char *s2);
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char *rtrim(char *str);
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void init_argv0(int argc, char **argv);
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void set_nice_name(const char *name);
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#define getline __getline
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#define getdelim __getdelim
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ssize_t __getline(char **lineptr, size_t *n, FILE *stream);
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ssize_t __getdelim(char **lineptr, size_t *n, int delim, FILE *stream);
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// file.cpp
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#define do_align(p, a) (((p) + (a) - 1) / (a) * (a))
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#define align_off(p, a) (do_align(p, a) - (p))
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extern const char **excl_list;
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struct file_attr {
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struct stat st;
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char con[128];
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};
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int fd_getpath(int fd, char *path, size_t size);
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int fd_getpathat(int dirfd, const char *name, char *path, size_t size);
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int mkdirs(const char *pathname, mode_t mode);
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void post_order_walk(int dirfd, void (*fn)(int, struct dirent *));
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void rm_rf(const char *path);
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void frm_rf(int dirfd);
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void mv_f(const char *source, const char *destination);
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void mv_dir(int src, int dest);
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void cp_afc(const char *source, const char *destination);
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void link_dir(int src, int dest);
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void clone_dir(int src, int dest);
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int getattr(const char *path, struct file_attr *a);
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int getattrat(int dirfd, const char *pathname, struct file_attr *a);
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int fgetattr(int fd, struct file_attr *a);
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int setattr(const char *path, struct file_attr *a);
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int setattrat(int dirfd, const char *pathname, struct file_attr *a);
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int fsetattr(int fd, struct file_attr *a);
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void fclone_attr(int sourcefd, int targetfd);
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void clone_attr(const char *source, const char *target);
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void mmap_ro(const char *filename, void **buf, size_t *size);
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void fd_full_read(int fd, void **buf, size_t *size);
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void full_read(const char *filename, void **buf, size_t *size);
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void full_read_at(int dirfd, const char *filename, void **buf, size_t *size);
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void write_zero(int fd, size_t size);
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#ifdef __cplusplus
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}
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#include <string>
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#include <vector>
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#include <functional>
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#include <string_view>
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#define str_contains(s, ss) ((ss) != nullptr && (s).find(ss) != std::string::npos)
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#define str_starts(s, ss) ((ss) != nullptr && (s).compare(0, strlen(ss), ss) == 0)
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// RAII
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class MutexGuard {
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public:
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explicit MutexGuard(pthread_mutex_t &m): mutex(&m) {
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pthread_mutex_lock(mutex);
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}
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explicit MutexGuard(pthread_mutex_t *m): mutex(m) {
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pthread_mutex_lock(mutex);
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}
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~MutexGuard() {
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pthread_mutex_unlock(mutex);
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}
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private:
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pthread_mutex_t *mutex;
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};
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class RunFinally {
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public:
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explicit RunFinally(std::function<void()> &&fn): fn(std::move(fn)) {}
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void disable() { fn = nullptr; }
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~RunFinally() { if (fn) fn(); }
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private:
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std::function<void ()> fn;
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};
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// file.cpp
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void file_readline(const char *filename, const std::function<bool (std::string_view&)> &fn, bool trim = false);
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void *__mmap(const char *filename, size_t *size, bool rw);
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template <typename B>
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void mmap_ro(const char *filename, B &buf, size_t &sz) {
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buf = (B) __mmap(filename, &sz, false);
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}
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template <typename B, typename L>
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void mmap_ro(const char *filename, B &buf, L &sz) {
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size_t __sz;
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buf = (B) __mmap(filename, &__sz, false);
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sz = __sz;
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}
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template <typename B>
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void mmap_rw(const char *filename, B &buf, size_t &sz) {
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buf = (B) __mmap(filename, &sz, true);
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}
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template <typename B, typename L>
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void mmap_rw(const char *filename, B &buf, L &sz) {
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size_t __sz;
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buf = (B) __mmap(filename, &__sz, true);
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sz = __sz;
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}
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// misc.cpp
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int new_daemon_thread(void *(*start_routine) (void *), void *arg = nullptr,
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const pthread_attr_t *attr = nullptr);
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struct exec_t {
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bool err = false;
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int fd = -2;
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void (*pre_exec)() = nullptr;
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int (*fork)() = xfork;
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const char **argv = nullptr;
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};
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int exec_command(exec_t &exec);
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template <class ...Args>
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int exec_command(exec_t &exec, Args &&...args) {
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const char *argv[] = {args..., nullptr};
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exec.argv = argv;
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return exec_command(exec);
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}
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int exec_command_sync(exec_t &exec);
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template <class ...Args>
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int exec_command_sync(exec_t &exec, Args &&...args) {
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const char *argv[] = {args..., nullptr};
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exec.argv = argv;
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return exec_command_sync(exec);
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}
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template <class ...Args>
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int exec_command_sync(Args &&...args) {
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exec_t exec{};
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return exec_command_sync(exec, args...);
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}
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bool ends_with(const std::string_view &s1, const std::string_view &s2);
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#endif
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