From c08ee6a7380227e25da525205bad216cb0cb1733 Mon Sep 17 00:00:00 2001
From: Imbus <aa>
Date: Sat, 7 Feb 2026 17:23:27 +0100
Subject: [PATCH] Guard for verify only

---
 writeimg.c | 50 +++++++++++++++++++++++++++++++-------------------
 1 file changed, 31 insertions(+), 19 deletions(-)

diff --git a/writeimg.c b/writeimg.c
index 4162006..f454e33 100644
--- a/writeimg.c
+++ b/writeimg.c
@@ -100,15 +100,20 @@ int perform_write(write_job_t *job) {
     int    crc = crc32_init();
     size_t b_written = 0;
 
-    while (!job->verify_only) {
+    while (42) {
+        fsync(block_fd);
         ssize_t read_bytes = read(file_fd, job->buffer, job->block_size);
         assert(read_bytes >= 0);
 
         if (read_bytes == 0) {
-            fsync(block_fd);
             crc = crc32_finalize(crc);
-            printf("\nWriting done...\n");
-            assert(job->total_bytes == b_written);
+
+            if (!job->verify_only) {
+                printf("\nWriting done...\n");
+                assert(job->total_bytes == b_written);
+            } else
+                assert(0 == b_written);
+
             break; /* Finished */
         }
 
@@ -120,13 +125,15 @@ int perform_write(write_job_t *job) {
 
         crc = crc32_update(crc, job->buffer, read_bytes);
 
-        ssize_t written_bytes = write(block_fd, job->buffer, read_bytes);
-        if (written_bytes < 0) {
-            fprintf(stderr, "%s: Write error\n", job->dev_name);
-            perror("Write");
-            exit(EXIT_FAILURE);
-        }
-        print_progress(b_written += written_bytes, job->total_bytes);
+        if (!job->verify_only) {
+            ssize_t written_bytes = write(block_fd, job->buffer, read_bytes);
+            if (written_bytes < 0) {
+                fprintf(stderr, "%s: Write error\n", job->dev_name);
+                perror("Write");
+                exit(EXIT_FAILURE);
+            }
+            print_progress(b_written += written_bytes, job->total_bytes);
+        } /* Else maybe give some helpful insights? */
     }
 
     lseek(block_fd, 0, SEEK_SET);
@@ -173,6 +180,7 @@ static const struct option longopts[] = {
     {"help", 0, 0, 'h'},
     {"version", 0, 0, 'V'},
     {"device", 1, 0, 'd'},
+    {"noconfirm", 0, 0, 'n'},
     {NULL, 0, 0, 0},
 };
 
@@ -240,12 +248,16 @@ int main(int argc, char *argv[]) {
     }
     close(fd);
 
-    printf("Writing %s to %s\n", wjob.filename, wjob.dev_name);
+    if (!wjob.verify_only)
+        printf("Writing %s to %s\n", wjob.filename, wjob.dev_name);
 
-    printf("Is this okay? (y/n): ");
-    fflush(stdout);
-    if ('y' != getchar()) {
-        exit(0);
+    if (ask_permission && !wjob.verify_only) {
+        printf("Is this okay? (y/n): ");
+        fflush(stdout);
+        if ('y' != getchar()) {
+            printf("Aborting...\n");
+            exit(EXIT_SUCCESS);
+        }
     }
 
     wjob.buffer = malloc(BLOCKSIZE);
@@ -266,7 +278,7 @@ int main(int argc, char *argv[]) {
     if (wjob.buffer2)
         free(wjob.buffer2);
 
-    printf("\n%.1f MiB's written and verified.\nAll good!\n", BYTES_TO_MIB(wjob.total_bytes));
-    exit(0);
-    return 0;
+    printf("\n%.1f MiB's verified.\nAll good!\n", BYTES_TO_MIB(wjob.total_bytes));
+
+    exit(EXIT_SUCCESS);
 }