Vibe codingMediumvc-g338

Subject Ai code reviewLevel Mid–Senior~16 minCommon in Networking & APIs interviewsIndustries Telecom, Software development

Question

An AI produced this C function to send a complete buffer over a non-blocking-capable socket for a media-streaming proxy. It works in light testing. Explain the bug, the condition that triggers it, and the fix.

1int send_all(int fd, const char *buf, size_t len) {2    ssize_t n = write(fd, buf, len);3    if (n < 0) {4        return -1;5    }6    if ((size_t)n != len) {7        fprintf(stderr, "short write\n");8    }9    return 0;10}

What a strong answer looks like

Treat the AI’s output as a draft to verify, not an answer to trust. Name the specific flaw and the input that triggers it, say how you’d catch it — tests, edge cases, reading critically — and how you’d re-prompt or decompose to get it right.

Learn the concepts

Describe your solution

Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.

Run or narrate your approach, then ask the coach.