Improve wrapper

game_eggs/steamcmd_servers/swords_'n_Magic_and_Stuff/wrapper.c

@@ -8,7 +8,7 @@
 #include <time.h>
 #include <sys/stat.h>
 
-void print_latest_log(const char* log_directory) {
+void print_latest_log(const char* log_directory, off_t* last_pos, off_t* last_size) {
     DIR *dir;
     struct dirent *entry;
     time_t latest_time = 0;
@@ -39,45 +39,58 @@ void print_latest_log(const char* log_directory) {
         return;
     }
 
-    printf("\nLatest log file: %s\n", latest_file);
-
     int fd = open(latest_file, O_RDONLY);
     if (fd < 0) {
         printf("Error opening file %s\n", latest_file);
         return;
     }
 
-    char buffer[4096];
+    // Get the size of the file
-    int bytes_read;
+    off_t size = lseek(fd, 0, SEEK_END);
-    int last_line_printed = 0; // Flag to check whether we have printed the last line
+
-    do {
+    // Check if the file size has increased since the last read
-        bytes_read = read(fd, buffer, sizeof(buffer));
+    if (size > *last_size) {
-        if (bytes_read > 0) {
+        // Move the file pointer to the beginning of the file
-            // Check if the last character is a newline
+        lseek(fd, 0, SEEK_SET);
-            if (buffer[bytes_read - 1] == '\n') {
+
-                fwrite(buffer, 1, bytes_read, stdout);
+        char buffer[4096];
-                fflush(stdout);
+        int bytes_read;
-            } else {
+        int last_line_printed = 0; // Flag to check whether we have printed the last line
-                // If the last character is not a newline, add one
+        do {
-                char* temp = (char*) malloc(bytes_read + 1);
+            bytes_read = read(fd, buffer, sizeof(buffer));
-                memcpy(temp, buffer, bytes_read);
+            if (bytes_read > 0) {
-                temp[bytes_read] = '\n';
+                // Check if the last character is a newline
-                fwrite(temp, 1, bytes_read + 1, stdout);
+                if (buffer[bytes_read - 1] == '\n') {
-                fflush(stdout);
+                    fwrite(buffer, 1, bytes_read, stdout);
-                free(temp);
+                    fflush(stdout);
+                } else {
+                    // If the last character is not a newline, add one
+                    char* temp = (char*) malloc(bytes_read + 1);
+                    memcpy(temp, buffer, bytes_read);
+                    temp[bytes_read] = '\n';
+                    fwrite(temp, 1, bytes_read + 1, stdout);
+                    fflush(stdout);
+                    free(temp);
+                }
+                last_line_printed = (buffer[bytes_read - 1] == '\n');
             }
-            last_line_printed = (buffer[bytes_read - 1] == '\n');
+        } while (bytes_read > 0);
+
+         // If the last line was not printed, print it now
+        if (!last_line_printed) {
+            printf("\n");
         }
-    } while (bytes_read > 0);
 
-    // If the last line was not printed, print it now
+    // Remember the last position and size that was read
-    if (!last_line_printed) {
+        *last_pos = lseek(fd, 0, SEEK_CUR);
-        printf("\n");
+        *last_size = size;
     }
-
     close(fd);
+
 }
 
+
+
 int main(int argc, char** argv) {
     if (argc < 2) {
         printf("Usage: winewrapper wine_path wine_args exe_path exe_args\n");
@@ -104,12 +117,15 @@ int main(int argc, char** argv) {
 
     sleep(30);
 
+    off_t last_pos = 0;
+    off_t last_size = 0;
     char* log_directory = "/home/container/SNM2020/Saved/Logs";
-    print_latest_log(log_directory);
+    print_latest_log(log_directory, &last_pos, &last_size);
+
 
     while (1) {
         sleep(1);
-        print_latest_log(log_directory);
+        print_latest_log(log_directory, &last_pos, &last_size);
     }
 
     kill(pid, SIGTERM);