Add interactive black-belt prompt to C CLI

Author: mearvk

bin/blackbelt-c.c

@@ -1,6 +1,6 @@
 /* Black Belt Ethical Auditor - Linux C CLI
- * Reads canonical BBEA JSON from --file or stdin and sends it to the
- * shared Black Belt engine transport. The AI engine remains external.
+ * Reads canonical BBEA JSON from --file, stdin, or the interactive prompt
+ * and sends it to the shared Black Belt engine transport. The AI engine remains external.
  */
 #define _POSIX_C_SOURCE 200809L
 #include <stdio.h>
@@ -16,12 +16,72 @@ static void usage(const char *p) {
     printf("Environment: BBEA_ENGINE_URL, BBEA_MODEL, BBEA_SYSTEM_PROMPT.\n");
 }
 
-static int copy_stream(FILE *in) {
-    int c;
-    while ((c = fgetc(in)) != EOF) {
-        if (fputc(c, stdout) == EOF) return 1;
+static int run_engine(const char *input) {
+    char tmp[] = "/tmp/blackbelt-c-XXXXXX";
+    int fd = mkstemp(tmp);
+    if (fd < 0) { perror("mkstemp"); return 2; }
+
+    FILE *out = fdopen(fd, "wb");
+    if (!out) {
+        perror("fdopen");
+        close(fd);
+        unlink(tmp);
+        return 2;
+    }
+
+    size_t length = strlen(input);
+    if (fwrite(input, 1, length, out) != length || fputc('\n', out) == EOF) {
+        perror("write");
+        fclose(out);
+        unlink(tmp);
+        return 2;
+    }
+    fclose(out);
+
+    const char *engine = getenv("BBEA_ENGINE_CMD");
+    if (!engine || !*engine) engine = "bin/blackbelt-engine.sh";
+
+    char command[4096];
+    int written = snprintf(command, sizeof(command), "cat '%s' | '%s'", tmp, engine);
+    if (written < 0 || (size_t)written >= sizeof(command)) {
+        fprintf(stderr, "Engine command is too long.\n");
+        unlink(tmp);
+        return 3;
+    }
+
+    int status = system(command);
+    unlink(tmp);
+    if (status == -1) return 3;
+    return WIFEXITED(status) ? WEXITSTATUS(status) : 3;
+}
+
+static int interactive(void) {
+    char *line = NULL;
+    size_t capacity = 0;
+
+    puts("Black Belt Ethical Auditor");
+    puts("Enter a JSON audit object, or type 'help' or 'quit'.");
+
+    for (;;) {
+        fputs("black-belt> ", stdout);
+        fflush(stdout);
+        ssize_t length = getline(&line, &capacity, stdin);
+        if (length < 0) break;
+        while (length > 0 && (line[length - 1] == '\n' || line[length - 1] == '\r'))
+            line[--length] = '\0';
+        if (length == 0) continue;
+        if (!strcmp(line, "quit") || !strcmp(line, "exit")) break;
+        if (!strcmp(line, "help")) {
+            puts("Paste a complete BBEA JSON audit object at the prompt.");
+            puts("Commands: help, quit, exit");
+            continue;
+        }
+        int rc = run_engine(line);
+        if (rc != 0) fprintf(stderr, "Audit failed (exit %d).\n", rc);
     }
-    return ferror(in) ? 1 : 0;
+    free(line);
+    putchar('\n');
+    return 0;
 }
 
 int main(int argc, char **argv) {
@@ -31,7 +91,7 @@ int main(int argc, char **argv) {
             usage(argv[0]); return 0;
         }
         if (!strcmp(argv[i], "--version")) {
-            puts("blackbelt-c 1.0 (BBEA CLI v2 transport)"); return 0;
+            puts("blackbelt-c 1.1 (BBEA CLI v2 transport)"); return 0;
         }
         if (!strcmp(argv[i], "--file") && i + 1 < argc) {
             file = argv[++i]; continue;
@@ -40,30 +100,25 @@ int main(int argc, char **argv) {
         usage(argv[0]); return 2;
     }
 
+    if (!file && isatty(STDIN_FILENO)) return interactive();
+
     FILE *in = stdin;
     if (file) {
         in = fopen(file, "rb");
         if (!in) { perror(file); return 2; }
     }
 
-    char tmp[] = "/tmp/blackbelt-c-XXXXXX";
-    int fd = mkstemp(tmp);
-    if (fd < 0) { perror("mkstemp"); if (file) fclose(in); return 2; }
-    FILE *out = fdopen(fd, "wb");
-    if (!out) { perror("fdopen"); close(fd); unlink(tmp); if (file) fclose(in); return 2; }
-    int rc = copy_stream(in);
+    char *input = NULL;
+    size_t capacity = 0;
+    ssize_t length = getdelim(&input, &capacity, '\0', in);
     if (file) fclose(in);
-    fclose(out);
-    if (rc) { unlink(tmp); return 2; }
-
-    const char *engine = getenv("BBEA_ENGINE_CMD");
-    if (!engine || !*engine) engine = "bin/blackbelt-engine.sh";
+    if (length < 0 || !input || length == 0) {
+        free(input);
+        fprintf(stderr, "No JSON audit input received.\n");
+        return 2;
+    }
 
-    char command[4096];
-    snprintf(command, sizeof(command), "cat '%s' | '%s'", tmp, engine);
-    int status = system(command);
-    unlink(tmp);
-    if (status == -1) return 3;
-    if (WIFEXITED(status)) return WEXITSTATUS(status);
-    return 3;
+    int rc = run_engine(input);
+    free(input);
+    return rc;
 }