After installing oc and oc mirror, running oc mirror shows no output in the console and the command fails.
This happens when the /tmp directory is mounted with the noexec option.

$ oc-mirror version --output yaml --v2
(no output)

This is because oc-mirror copies itself to a path like /tmp/oc-mirror-<random numbers>/oc-mirror and tries to run it from there.
If /tmp is mounted as noexec, it cannot run the copied binary.

482189 execve("/tmp/oc-mirror-XXXXXXXXXXXX/oc-mirror", ["oc-mirror", "version", "--output", "yaml", "--v2"], 0xc000a8a0e0 /* 27 vars */ <unfinished ...>
482171 nanosleep({tv_sec=0, tv_nsec=20000}, NULL) = 0
482171 nanosleep({tv_sec=0, tv_nsec=20000},  <unfinished ...>
482189 <... execve resumed>)            = -1 EACCES (Permission denied)

To work around this, it is possible to set the TMPDIR environment variable to a directory that is not mounted with noexec.

mkdir -p "$HOME/tmp_exec"
export TMPDIR="$HOME/tmp_exec"

According to the link below, mounting /tmp with noexec is a recommended security setting, so it is not uncommon for users to configure it this way:

https://www.tenable.com/audits/items/DISA_STIG_Red_Hat_Enterprise_Linux_9_v2r4.audit:0a7fa4567a3e024255a57e75ce36b0c6

So, it would be helpful if oc-mirror could detect this case and show a clear message in the console when it fails to run due to noexec on the target directory.