---
name: "afl-cmin.bash"
section: "8"
platform: "linux"
package: "afl++"
version: "5.00c-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/afl-cmin.bash"
---

# afl-cmin.bash(8)

## NAME

**afl-cmin.bash**

## SYNOPSIS

Usage: ./afl-cmin.bash \[ options \] -- /path/to/target\_app \[ ... \]

## OPTIONS

```
Required parameters:
  -i dir        - input directory with the starting corpus
  -o dir        - output directory for minimized files
Execution control settings:
  -T tasks      - how many parallel processes to create (default=1, "all"=nproc)
  -f file       - location read by the fuzzed program (default: stdin)
  -m megs       - memory limit for child process (default=none MB)
  -t msec       - run time limit for child process (default: 5000ms)
  -O            - use binary-only instrumentation (FRIDA mode)
  -Q            - use binary-only instrumentation (QEMU mode)
  -U            - use unicorn-based instrumentation (Unicorn mode)
  -X            - use Nyx mode
Minimization settings:
  -A            - allow crashing and timeout inputs
  -C            - keep crashing inputs, reject everything else
  -e            - solve for edge coverage only, ignore hit counts
For additional tips, please consult README.md.
This script cannot read filenames that end with a space ' '.
Environment variables used:
AFL_KEEP_TRACES: leave the temporary <out_dir>.traces directory
AFL_NO_FORKSRV: run target via execve instead of using the forkserver
AFL_PATH: last resort location to find the afl-showmap binary
AFL_SKIP_BIN_CHECK: skip check for target binary
AFL_CUSTOM_MUTATOR_LIBRARY: custom mutator library (post_process and send)
AFL_PYTHON_MODULE: custom mutator library (post_process and send)
```

## AUTHOR

AFL++ was written by Michal "lcamtuf" Zalewski and is maintained by Marc "van Hauser" Heuse \<mh@mh-sec.de\>, Dominik Maier \<domenukk@gmail.com\>, Andrea Fioraldi \<andreafioraldi@gmail.com\> and Heiko "hexcoder-" Eissfeldt \<heiko.eissfeldt@hexco.de\> The homepage of AFL++ is: https://github.com/AFLplusplus/AFLplusplus

## LICENSE

AFL++ is licensed under AGPL-3.0-or-later, with original components under Apache-2.0; an optional commercial license is available. See https://github.com/AFLplusplus/AFLplusplus/blob/stable/LICENSING.md