works

mine/rgz/service.sh

@@ -13,10 +13,10 @@ After=network.target
 
 [Service]
 Type=simple
-ExecStart=/home/pajjilykk/CLionProjects/CS-LABS/rgz/fifo_server_daemon 1000
+ExecStart=/home/pajjilykk/CLionProjects/CS-LABS/mine/rgz/fifo_server_daemon 1000
 User=pajjilykk
 Group=pajjilykk
-WorkingDirectory=/home/pajjilykk/CLionProjects/CS-LABS/rgz
+WorkingDirectory=/home/pajjilykk/CLionProjects/CS-LABS/mine/rgz
 
 # мягко останавливать и давать время на выход
 KillSignal=SIGTERM

vlad/rgz/Makefile

@@ -0,0 +1,19 @@
+CC      = gcc
+CFLAGS  = -Wall -Wextra -O2
+LDFLAGS =
+
+SERVER  = daemon
+CLIENT  = client
+
+.PHONY: all clean
+
+all: $(SERVER) $(CLIENT)
+
+$(SERVER): daemon.c
+	$(CC) $(CFLAGS) -o $(SERVER) daemon.c $(LDFLAGS)
+
+$(CLIENT): client.c
+	$(CC) $(CFLAGS) -o $(CLIENT) client.c $(LDFLAGS)
+
+clean:
+	rm -f $(SERVER) $(CLIENT)

vlad/rgz/bad_service.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+target=/etc/systemd/system/fifo.service
+
+USER="pajjilykk"
+GROUP="pajjilykk"
+WORKDIR="/home/pajjilykk/CLionProjects/CS-LABS/vlad/rgz"
+EXECUTABLE="$WORKDIR/daemon"
+tmp=$(mktemp)
+
+trap 'rm -f "$tmp"' EXIT
+
+cat > "$tmp" <<UNIT
+[Unit]
+Description=FIFO text processing daemon (systemd-managed)
+After=network.target
+
+[Service]
+Type=simple
+ExecStart=$EXECUTABLE pepep
+User=$USER
+Group=$GROUP
+WorkingDirectory=$WORKDIR
+KillSignal=SIGTERM
+TimeoutStopSec=5s
+KillMode=control-group
+Restart=on-failure
+RestartSec=1s
+
+[Install]
+WantedBy=multi-user.target
+UNIT
+
+sudo install -m 0644 "$tmp" "$target"
+sudo systemctl daemon-reload
+echo "Replaced \`$target\` with the predefined service unit."

vlad/rgz/client.c

@@ -0,0 +1,133 @@
+// fifo_client.c
+// Клиент: читает входной файл, отправляет содержимое в FIFO_REQUEST,
+// читает ответ из FIFO_RESPONSE, отделяет "\nREPLACEMENTS:<n>\n",
+// пишет обработанный текст в выходной файл и печатает количество замен.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>     // read, write, close, getpid
+#include <fcntl.h>      // open
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+#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 <input_file> <output_file>\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: %s\n", strerror(errno));
+        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;
+}

vlad/rgz/daemon.c

@@ -0,0 +1,203 @@
+// fifo_server_daemon.c
+// Демон: читает из FIFO_REQUEST, обрабатывает текст,
+// для каждой пары одинаковых подряд символов заменяет второй на пробел,
+// всего не более max_replacements замен, пишет результат в FIFO_RESPONSE
+// и дописывает "\nREPLACEMENTS:<n>\n". Логирует ошибки в syslog.
+
+#include <stdio.h>      // fprintf
+#include <stdlib.h>     // malloc, free, exit, strtoll
+#include <string.h>     // strlen, strerror
+#include <unistd.h>     // read, write, close, unlink
+#include <fcntl.h>      // open, O_RDONLY, O_WRONLY
+#include <sys/types.h>  // типы
+#include <sys/stat.h>   // mkfifo
+#include <errno.h>      // errno
+#include <signal.h>     // signal, SIGINT, SIGTERM, SIGPIPE
+#include <syslog.h>     // 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;
+}
+
+// для каждой пары одинаковых подряд символов второй -> ' ', до max_replacements
+long long process_data(const char *input, size_t input_len,
+                       char *output, size_t output_size,
+                       long long max_replacements)
+{
+    if (input_len == 0 || output_size == 0) {
+        return 0;
+    }
+
+    long long total_replacements = 0;
+    size_t out_pos = 0;
+
+    unsigned char prev = (unsigned char)input[0];
+    output[out_pos++] = (char)prev;
+
+    for (size_t i = 1; i < input_len && out_pos < output_size - 1; i++) {
+        unsigned char c = (unsigned char)input[i];
+        unsigned char outc = c;
+
+        if (c == prev && total_replacements < max_replacements) {
+            outc = ' ';
+            total_replacements++;
+        }
+
+        output[out_pos++] = (char)outc;
+        prev = c;
+    }
+
+    output[out_pos] = '\0';
+    return total_replacements;
+}
+
+int main(int argc, char *argv[]) {
+    if (argc != 2) {
+        fprintf(stderr, "Usage: %s <max_replacements>\n", argv[0]);
+        return 1;
+    }
+
+    long long max_replacements = parse_ll(argv[1]);
+    if (max_replacements < 0) {
+        fprintf(stderr, "ERROR: Invalid max_replacements (must be non-negative integer)\n");
+        return 1;
+    }
+
+    openlog("fifo_server_daemon", LOG_PID | LOG_NDELAY, LOG_DAEMON);
+    syslog(LOG_INFO, "Server started (systemd), max_replacements=%lld", max_replacements);
+
+    struct sigaction sa;
+    memset(&sa, 0, sizeof(sa));
+    sa.sa_handler = signal_handler;
+    sigemptyset(&sa.sa_mask);
+    sigaction(SIGINT,  &sa, NULL);
+    sigaction(SIGTERM, &sa, NULL);
+    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 (!running) {
+            if (fd_req != -1)
+                close(fd_req);
+            break;
+        }
+        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);
+            break;
+        }
+
+        ssize_t bytes_read = read(fd_req, input_buffer, BUFFER_SIZE - 1);
+        if (bytes_read < 0 && errno == EINTR && !running) {
+            close(fd_req);
+            free(input_buffer);
+            free(output_buffer);
+            break;
+        }
+        close(fd_req);
+
+        if (!running) {
+            free(input_buffer);
+            free(output_buffer);
+            break;
+        }
+
+        if (bytes_read <= 0) {
+            free(input_buffer);
+            free(output_buffer);
+            if (!running)
+                break;
+            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);
+
+        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);
+            if (!running)
+                break;
+            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);
+        if (write(fd_resp, result, strlen(result)) < 0) {
+            syslog(LOG_WARNING, "write replacements trailer failed: %s", strerror(errno));
+        }
+
+        close(fd_resp);
+        syslog(LOG_INFO, "Response sent: %zd bytes; replacements=%lld",
+               bytes_written, replacements);
+
+        free(input_buffer);
+        free(output_buffer);
+    }
+
+    syslog(LOG_INFO, "Server stopping, cleaning up");
+    unlink(FIFO_REQUEST);
+    unlink(FIFO_RESPONSE);
+    closelog();
+    return 0;
+}

vlad/rgz/input.txt

@@ -0,0 +1,4 @@
+abacaba
+hello
+abcaa
+aaaaa

vlad/rgz/service.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+target=/etc/systemd/system/fifo.service
+
+USER="pajjilykk"
+GROUP="pajjilykk"
+WORKDIR="/home/pajjilykk/CLionProjects/CS-LABS/vlad/rgz"
+EXECUTABLE="$WORKDIR/daemon"
+tmp=$(mktemp)
+
+trap 'rm -f "$tmp"' EXIT
+
+cat > "$tmp" <<UNIT
+[Unit]
+Description=FIFO text processing daemon (systemd-managed)
+After=network.target
+
+[Service]
+Type=simple
+ExecStart=$EXECUTABLE 1000
+User=$USER
+Group=$GROUP
+WorkingDirectory=$WORKDIR
+KillSignal=SIGTERM
+TimeoutStopSec=5s
+KillMode=control-group
+Restart=on-failure
+RestartSec=1s
+
+[Install]
+WantedBy=multi-user.target
+UNIT
+
+sudo install -m 0644 "$tmp" "$target"
+sudo systemctl daemon-reload
+echo "Replaced \`$target\` with the predefined service unit."