244 lines
7.4 KiB
C++
244 lines
7.4 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 xfstat(int fd, 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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int parse_int(const char *s);
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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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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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ssize_t fd_path(int fd, char *path, size_t size);
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int fd_pathat(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 rm_rf(const char *path);
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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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int getattr(const char *path, struct file_attr *a);
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int getattrat(int dirfd, const char *name, 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 *name, 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 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 *file, const std::function<bool (std::string_view)> &fn, bool trim = false);
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void parse_prop_file(const char *file, const std::function
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<bool(std::string_view, std::string_view)> &fn);
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void *__mmap(const char *filename, size_t *size, bool rw);
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void frm_rf(int dirfd, std::initializer_list<const char *> excl = std::initializer_list<const char *>());
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void clone_dir(int src, int dest, bool overwrite = true);
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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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static inline int parse_int(char *s) { return parse_int((const char *) s); }
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template <class S>
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int parse_int(S __s) { return parse_int(__s.data()); }
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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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int new_daemon_thread(std::function<void()> &&fn);
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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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