39982d57ef
- Block signals in logging routine (fix #3976) - Prevent possible deadlock after fork (stdio locks internally) by creating a new FILE pointer per logging call (thread/stack local)
125 lines
3.5 KiB
C++
125 lines
3.5 KiB
C++
#pragma once
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#include <pthread.h>
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#include <string>
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#include <functional>
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#include <string_view>
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#define UID_ROOT 0
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#define UID_SHELL 2000
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#define DISALLOW_COPY_AND_MOVE(clazz) \
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clazz(const clazz &) = delete; \
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clazz(clazz &&) = delete;
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class mutex_guard {
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DISALLOW_COPY_AND_MOVE(mutex_guard)
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public:
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explicit mutex_guard(pthread_mutex_t &m): mutex(&m) {
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pthread_mutex_lock(mutex);
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}
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void unlock() {
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pthread_mutex_unlock(mutex);
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mutex = nullptr;
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}
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~mutex_guard() {
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if (mutex) 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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template <class Func>
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class run_finally {
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DISALLOW_COPY_AND_MOVE(run_finally)
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public:
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explicit run_finally(const Func &fn) : fn(fn) {}
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~run_finally() { fn(); }
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private:
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const Func &fn;
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};
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template <typename T>
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class reversed_container {
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public:
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reversed_container(T &base) : base(base) {}
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decltype(std::declval<T>().rbegin()) begin() { return base.rbegin(); }
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decltype(std::declval<T>().crbegin()) begin() const { return base.crbegin(); }
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decltype(std::declval<T>().crbegin()) cbegin() const { return base.crbegin(); }
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decltype(std::declval<T>().rend()) end() { return base.rend(); }
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decltype(std::declval<T>().crend()) end() const { return base.crend(); }
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decltype(std::declval<T>().crend()) cend() const { return base.crend(); }
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private:
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T &base;
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};
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template <typename T>
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reversed_container<T> reversed(T &base) {
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return reversed_container<T>(base);
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}
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int parse_int(const char *s);
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static inline int parse_int(const std::string &s) { return parse_int(s.data()); }
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static inline int parse_int(std::string_view s) { return parse_int(s.data()); }
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using thread_entry = void *(*)(void *);
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int new_daemon_thread(thread_entry entry, void *arg = nullptr);
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int new_daemon_thread(void(*entry)());
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int new_daemon_thread(std::function<void()> &&entry);
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static inline bool str_contains(std::string_view s, std::string_view ss) {
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return s.find(ss) != std::string::npos;
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}
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static inline bool str_starts(std::string_view s, std::string_view ss) {
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return s.rfind(ss, 0) == 0;
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}
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static inline bool str_ends(std::string_view s, std::string_view ss) {
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return s.size() >= ss.size() && s.compare(s.size() - ss.size(), std::string::npos, ss) == 0;
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}
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int fork_dont_care();
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int fork_no_orphan();
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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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uint32_t binary_gcd(uint32_t u, uint32_t v);
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int switch_mnt_ns(int pid);
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int gen_rand_str(char *buf, int len, bool varlen = true);
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std::string &replace_all(std::string &str, std::string_view from, std::string_view to);
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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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template <class ...Args>
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void exec_command_async(Args &&...args) {
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const char *argv[] = {args..., nullptr};
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exec_t exec {
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.argv = argv,
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.fork = fork_dont_care
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};
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exec_command(exec);
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}
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