From 84ff83b371ee04b218961f018de5f6820f79d54f Mon Sep 17 00:00:00 2001 From: pajjilykk Date: Wed, 10 Dec 2025 16:13:07 +0700 Subject: [PATCH] rgz? --- rgz/Makefile | 20 ++++ rgz/fifo_client.c | 129 +++++++++++++++++++++++ rgz/fifo_server_daemon.c | 219 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 368 insertions(+) create mode 100644 rgz/Makefile create mode 100644 rgz/fifo_client.c create mode 100644 rgz/fifo_server_daemon.c diff --git a/rgz/Makefile b/rgz/Makefile new file mode 100644 index 0000000..39ce07d --- /dev/null +++ b/rgz/Makefile @@ -0,0 +1,20 @@ +CC = gcc +CFLAGS = -Wall -Wextra -O2 +LDFLAGS = + +all: daemon client + +daemon: fifo_server_daemon.o + $(CC) $(CFLAGS) -o fifo_server_daemon fifo_server_daemon.o $(LDFLAGS) + +client: fifo_client.o + $(CC) $(CFLAGS) -o fifo_client fifo_client.o $(LDFLAGS) + +fifo_server_daemon.o: fifo_server_daemon.c + $(CC) $(CFLAGS) -c fifo_server_daemon.c + +fifo_client.o: fifo_client.c + $(CC) $(CFLAGS) -c fifo_client.c + +clean: + rm -f fifo_server_daemon fifo_client *.o diff --git a/rgz/fifo_client.c b/rgz/fifo_client.c new file mode 100644 index 0000000..6601b2f --- /dev/null +++ b/rgz/fifo_client.c @@ -0,0 +1,129 @@ +// fifo_client.c +#include +#include +#include +#include +#include +#include +#include +#include + +#define FIFO_REQUEST "/tmp/fifo_request" +#define FIFO_RESPONSE "/tmp/fifo_response" +#define BUFFER_SIZE 4096 + +void print_usage(const char *progname) { + fprintf(stderr, "Usage: %s \n", progname); + fprintf(stderr, "Example: %s input.txt output.txt\n", progname); +} + +int main(int argc, char *argv[]) { + if (argc != 3) { + fprintf(stderr, "ERROR: Неверное количество аргументов\n"); + print_usage(argv[0]); + return 1; + } + + const char *input_file = argv[1]; + const char *output_file = argv[2]; + + printf("=== FIFO Client ===\n"); + printf("Client PID: %d\n", getpid()); + printf("Входной файл: %s\n", input_file); + printf("Выходной файл: %s\n", output_file); + + int in_fd = open(input_file, O_RDONLY); + if (in_fd < 0) { + fprintf(stderr, "ERROR: Не удалось открыть входной файл %s: %s\n", + input_file, strerror(errno)); + return 1; + } + + char *buffer = malloc(BUFFER_SIZE); + if (!buffer) { + fprintf(stderr, "ERROR: Не удалось выделить память\n"); + close(in_fd); + return 1; + } + + ssize_t bytes_read = read(in_fd, buffer, BUFFER_SIZE - 1); + close(in_fd); + if (bytes_read < 0) { + fprintf(stderr, "ERROR: Не удалось прочитать файл: %s\n", strerror(errno)); + free(buffer); + return 1; + } + + buffer[bytes_read] = '\0'; + printf("Прочитано байт из файла: %zd\n", bytes_read); + + printf("Отправка запроса серверу...\n"); + int fd_req = open(FIFO_REQUEST, O_WRONLY); + if (fd_req == -1) { + fprintf(stderr, "ERROR: Не удалось открыть FIFO запроса: %s\n", strerror(errno)); + fprintf(stderr, "Убедитесь, что сервер (демон) запущен!\n"); + free(buffer); + return 1; + } + + ssize_t bytes_written = write(fd_req, buffer, bytes_read); + close(fd_req); + if (bytes_written != bytes_read) { + fprintf(stderr, "ERROR: Ошибка отправки данных\n"); + free(buffer); + return 1; + } + + printf("Отправлено байт: %zd\n", bytes_written); + + printf("Ожидание ответа от сервера...\n"); + int fd_resp = open(FIFO_RESPONSE, O_RDONLY); + if (fd_resp == -1) { + fprintf(stderr, "ERROR: Не удалось открыть FIFO ответа: %s\n", strerror(errno)); + free(buffer); + return 1; + } + + ssize_t response_bytes = read(fd_resp, buffer, BUFFER_SIZE - 1); + close(fd_resp); + if (response_bytes < 0) { + fprintf(stderr, "ERROR: Ошибка чтения ответа\n"); + free(buffer); + return 1; + } + + buffer[response_bytes] = '\0'; + printf("Получено байт от сервера: %zd\n", response_bytes); + + char *replacements_info = strstr(buffer, "\nREPLACEMENTS:"); + long long replacements = 0; + if (replacements_info) { + sscanf(replacements_info, "\nREPLACEMENTS:%lld", &replacements); + *replacements_info = '\0'; + response_bytes = replacements_info - buffer; + } + + int out_fd = open(output_file, O_CREAT | O_WRONLY | O_TRUNC, + S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); + if (out_fd < 0) { + fprintf(stderr, "ERROR: Не удалось открыть выходной файл %s: %s\n", + output_file, strerror(errno)); + free(buffer); + return 1; + } + + ssize_t written = write(out_fd, buffer, response_bytes); + close(out_fd); + if (written != response_bytes) { + fprintf(stderr, "ERROR: Ошибка записи в выходной файл\n"); + free(buffer); + return 1; + } + + printf("Записано байт в выходной файл: %zd\n", written); + printf("Количество выполненных замен: %lld\n", replacements); + printf("\nОбработка завершена успешно!\n"); + + free(buffer); + return 0; +} diff --git a/rgz/fifo_server_daemon.c b/rgz/fifo_server_daemon.c new file mode 100644 index 0000000..e6d5428 --- /dev/null +++ b/rgz/fifo_server_daemon.c @@ -0,0 +1,219 @@ +// fifo_server_daemon.c +#include // fprintf, stderr (для отладки) +#include // malloc, free, exit, strtoll +#include // strlen, strerror +#include // read, write, close, unlink, getpid, chdir +#include // open, флаги O_RDONLY/O_WRONLY +#include // типы для системных вызовов +#include // mkfifo, права доступа, umask +#include // errno +#include // signal, SIGINT, SIGTERM, SIGPIPE, SIGHUP +#include // syslog, openlog, closelog + +#define FIFO_REQUEST "/tmp/fifo_request" +#define FIFO_RESPONSE "/tmp/fifo_response" +#define BUFFER_SIZE 4096 + +volatile sig_atomic_t running = 1; + +void signal_handler(int sig) { + (void)sig; + running = 0; +} + +// разбор неотрицательного long long +static long long parse_ll(const char *s) { + char *end = NULL; + errno = 0; + long long v = strtoll(s, &end, 10); + if (errno != 0 || end == s || *end != '\0' || v < 0) { + return -1; + } + return v; +} + +// логика обработки текста +long long process_data(const char *input, size_t input_len, + char *output, size_t output_size, + long long max_replacements) { + long long total_replacements = 0; + int at_line_start = 1; + unsigned char line_key = 0; + size_t out_pos = 0; + + for (size_t i = 0; i < input_len && out_pos < output_size - 1; i++) { + unsigned char c = (unsigned char)input[i]; + + if (at_line_start) { + line_key = c; + at_line_start = 0; + } + + unsigned char outc = c; + + if (c == '\n') { + at_line_start = 1; + } else if (c == line_key && total_replacements < max_replacements) { + outc = ' '; + total_replacements++; + } + + output[out_pos++] = (char)outc; + } + + output[out_pos] = '\0'; + return total_replacements; +} + +static void daemonize(void) { + pid_t pid; + + pid = fork(); + if (pid < 0) + exit(1); + if (pid > 0) + exit(0); + + if (setsid() < 0) + exit(1); + + signal(SIGHUP, SIG_IGN); + + pid = fork(); + if (pid < 0) + exit(1); + if (pid > 0) + exit(0); + + if (chdir("/") < 0) + exit(1); + + umask(0); + + // аккуратно закрыть дескрипторы: + for (int fd = 0; fd < 1024; fd++) + close(fd); + + int devnull = open("/dev/null", O_RDWR); + if (devnull >= 0) { + dup2(devnull, STDIN_FILENO); + dup2(devnull, STDOUT_FILENO); + dup2(devnull, STDERR_FILENO); + if (devnull > 2) + close(devnull); + } +} + +int main(int argc, char *argv[]) { + // debug-вывод в stderr, до превращения в демона + fprintf(stderr, "DEBUG: starting main, argc=%d\n", argc); + fflush(stderr); + + if (argc != 2) { + fprintf(stderr, "Usage: %s \n", argv[0]); + return 1; + } + + long long max_replacements = parse_ll(argv[1]); + if (max_replacements < 0) { + fprintf(stderr, "ERROR: Invalid max_replacements\n"); + return 1; + } + + // превращаемся в демона + daemonize(); + + // настраиваем syslog + openlog("fifo_server_daemon", LOG_PID | LOG_NDELAY, LOG_DAEMON); + syslog(LOG_INFO, "Server daemon started, max_replacements=%lld", max_replacements); + + signal(SIGINT, signal_handler); + signal(SIGTERM, signal_handler); + signal(SIGPIPE, SIG_IGN); + + unlink(FIFO_REQUEST); + unlink(FIFO_RESPONSE); + + if (mkfifo(FIFO_REQUEST, 0666) == -1) { + syslog(LOG_ERR, "mkfifo request failed: %s", strerror(errno)); + closelog(); + return 1; + } + + if (mkfifo(FIFO_RESPONSE, 0666) == -1) { + syslog(LOG_ERR, "mkfifo response failed: %s", strerror(errno)); + unlink(FIFO_REQUEST); + closelog(); + return 1; + } + + syslog(LOG_INFO, "FIFO created: request=%s, response=%s", + FIFO_REQUEST, FIFO_RESPONSE); + + while (running) { + int fd_req = open(FIFO_REQUEST, O_RDONLY); + if (fd_req == -1) { + if (errno == EINTR) + continue; + syslog(LOG_ERR, "open request FIFO failed: %s", strerror(errno)); + break; + } + + char *input_buffer = malloc(BUFFER_SIZE); + char *output_buffer = malloc(BUFFER_SIZE); + if (!input_buffer || !output_buffer) { + syslog(LOG_ERR, "Memory allocation failed"); + close(fd_req); + free(input_buffer); + free(output_buffer); + continue; + } + + ssize_t bytes_read = read(fd_req, input_buffer, BUFFER_SIZE - 1); + close(fd_req); + + if (bytes_read <= 0) { + free(input_buffer); + free(output_buffer); + continue; + } + + input_buffer[bytes_read] = '\0'; + syslog(LOG_INFO, "Request received: %zd bytes", bytes_read); + + long long replacements = + process_data(input_buffer, (size_t)bytes_read, + output_buffer, BUFFER_SIZE, + max_replacements); + + syslog(LOG_INFO, "Replacements done: %lld", replacements); + + int fd_resp = open(FIFO_RESPONSE, O_WRONLY); + if (fd_resp == -1) { + syslog(LOG_ERR, "open response FIFO failed: %s", strerror(errno)); + free(input_buffer); + free(output_buffer); + continue; + } + + size_t output_len = strlen(output_buffer); + ssize_t bytes_written = write(fd_resp, output_buffer, output_len); + + char result[64]; + snprintf(result, sizeof(result), "\nREPLACEMENTS:%lld\n", replacements); + write(fd_resp, result, strlen(result)); + + close(fd_resp); + + syslog(LOG_INFO, "Response sent: %zd bytes", bytes_written); + + free(input_buffer); + free(output_buffer); + } + + syslog(LOG_INFO, "Server daemon stopping, cleaning up"); + unlink(FIFO_REQUEST); + unlink(FIFO_RESPONSE); + closelog(); + return 0; +}