Version v0.2.68 - Implemented stdin pipe support for OTP program

otp.c

@@ -50,6 +50,11 @@ static char current_pads_dir[512] = DEFAULT_PADS_DIR;
 int main(int argc, char* argv[]);
 int interactive_mode(void);
 int command_line_mode(int argc, char* argv[]);
+int pipe_mode(int argc, char* argv[], const char* piped_text);
+
+// Stdin detection functions
+int has_stdin_data(void);
+char* read_stdin_text(void);
 
 // OTP thumb drive detection function
 int detect_otp_thumb_drive(char* otp_drive_path, size_t path_size);
@@ -124,7 +129,18 @@ int main(int argc, char* argv[]) {
         current_pads_dir[sizeof(current_pads_dir) - 1] = '\0';
     }
     
-    if (argc == 1) {
+    // Check for piped input
+    if (argc == 1 && has_stdin_data()) {
+        // No arguments but has piped data - enter pipe mode for interactive pad selection
+        char* piped_text = read_stdin_text();
+        if (piped_text) {
+            int result = pipe_mode(argc, argv, piped_text);
+            free(piped_text);
+            return result;
+        }
+        // If reading stdin failed, fall back to interactive mode
+        return interactive_mode();
+    } else if (argc == 1) {
         return interactive_mode();
     } else {
         return command_line_mode(argc, argv);
@@ -158,6 +174,7 @@ int interactive_mode(void) {
                 handle_pads_menu();
                 break;
             case 'X':
+            case 'Q':
                 printf("Goodbye!\n");
                 return 0;
             default:
@@ -1127,10 +1144,39 @@ int generate_pad_with_entropy(uint64_t size_bytes, int display_progress, int use
     // Get final paths in pads directory
     get_pad_path(chksum_hex, pad_path, state_path);
     
+    // Try rename first (works for same filesystem)
     if (rename(temp_filename, pad_path) != 0) {
-        printf("Error: Cannot move pad file to pads directory\n");
+        // If rename fails, try copy and delete (works across filesystems)
+        FILE* temp_file = fopen(temp_filename, "rb");
+        FILE* dest_file = fopen(pad_path, "wb");
+        
+        if (!temp_file || !dest_file) {
+            printf("Error: Cannot copy pad file to pads directory\n");
+            if (temp_file) fclose(temp_file);
+            if (dest_file) fclose(dest_file);
+            unlink(temp_filename);
+            return 1;
+        }
+        
+        // Copy file in chunks
+        unsigned char copy_buffer[64 * 1024];
+        size_t bytes_read;
+        while ((bytes_read = fread(copy_buffer, 1, sizeof(copy_buffer), temp_file)) > 0) {
+            if (fwrite(copy_buffer, 1, bytes_read, dest_file) != bytes_read) {
+                printf("Error: Failed to copy pad file to pads directory\n");
+                fclose(temp_file);
+                fclose(dest_file);
+                unlink(temp_filename);
+                unlink(pad_path);
+                return 1;
+            }
+        }
+        
+        fclose(temp_file);
+        fclose(dest_file);
+        
+        // Remove temporary file after successful copy
         unlink(temp_filename);
-        return 1;
     }
     
     // Set pad file to read-only
@@ -2293,6 +2339,83 @@ void get_pad_path(const char* chksum, char* pad_path, char* state_path) {
     snprintf(state_path, 1024, "%s/%s.state", current_pads_dir, chksum);
 }
 
+// Stdin detection functions implementation
+int has_stdin_data(void) {
+    // Check if stdin is a pipe/redirect (not a terminal)
+    if (!isatty(STDIN_FILENO)) {
+        return 1;
+    }
+    return 0;
+}
+
+char* read_stdin_text(void) {
+    size_t capacity = 4096;
+    size_t length = 0;
+    char* buffer = malloc(capacity);
+    
+    if (!buffer) {
+        return NULL;
+    }
+    
+    char chunk[1024];
+    while (fgets(chunk, sizeof(chunk), stdin)) {
+        size_t chunk_len = strlen(chunk);
+        
+        // Ensure we have enough capacity
+        while (length + chunk_len >= capacity) {
+            capacity *= 2;
+            char* new_buffer = realloc(buffer, capacity);
+            if (!new_buffer) {
+                free(buffer);
+                return NULL;
+            }
+            buffer = new_buffer;
+        }
+        
+        strcpy(buffer + length, chunk);
+        length += chunk_len;
+    }
+    
+    // Remove trailing newline if present
+    if (length > 0 && buffer[length - 1] == '\n') {
+        buffer[length - 1] = '\0';
+        length--;
+    }
+    
+    // If empty, free and return NULL
+    if (length == 0) {
+        free(buffer);
+        return NULL;
+    }
+    
+    return buffer;
+}
+
+int pipe_mode(int argc, char* argv[], const char* piped_text) {
+    (void)argc; // Suppress unused parameter warning
+    (void)argv; // Suppress unused parameter warning
+    
+    printf("Piped text received: \"%s\"\n\n", piped_text);
+    
+    // List available pads for selection
+    int pad_count = list_available_pads();
+    if (pad_count == 0) {
+        printf("No pads available. Generate a pad first.\n");
+        return 1;
+    }
+    
+    printf("\nEnter pad selection (number, checksum, or prefix): ");
+    char pad_input[MAX_HASH_LENGTH];
+    if (!fgets(pad_input, sizeof(pad_input), stdin)) {
+        printf("Error: Failed to read pad selection\n");
+        return 1;
+    }
+    pad_input[strcspn(pad_input, "\n")] = 0;
+    
+    // Encrypt the piped text
+    return encrypt_text(pad_input, piped_text);
+}
+
 // OTP thumb drive detection function implementation
 int detect_otp_thumb_drive(char* otp_drive_path, size_t path_size) {
     const char* mount_dirs[] = {"/media", "/run/media", "/mnt", NULL};
@@ -3016,10 +3139,15 @@ int handle_pads_menu(void) {
         
         char input[10];
         if (fgets(input, sizeof(input), stdin)) {
-            char choice = toupper(input[0]);
-            if (choice == 'G') {
-                return handle_generate_menu();
+        char choice = toupper(input[0]);
+        if (choice == 'G') {
+            int result = handle_generate_menu();
+            if (result == 0) {
+                // After successful pad generation, return to pads menu
+                return handle_pads_menu();
             }
+            return result;
+        }
         }
         return 0;
     }
@@ -3088,7 +3216,12 @@ int handle_pads_menu(void) {
     
     // Handle actions first
     if (toupper(input[0]) == 'G') {
-        return handle_generate_menu();
+        int result = handle_generate_menu();
+        if (result == 0) {
+            // After successful pad generation, return to pads menu
+            return handle_pads_menu();
+        }
+        return result;
     } else if (toupper(input[0]) == 'B') {
         return 0; // Back to main menu
     }