Description

When LABEL is longer than 11 characters, mkfs.fat 4.2 (2021-01-31) will fail while mkfs.fat 4.1 (2017-01-24) will cut it.

I want to split out a new function for formating filesystem. But unfortunally, there is a hook pre_prepare_partitions and prepare_partitions_custom. And bcm2711 use it for LABEL. Here is my try: hzyitc/armbian-onecloud#6c190484

The source of mkfs.fat:

v4.1: https://github.com/dosfstools/dosfstools/blob/v4.1/src/mkfs.fat.c#L1500:

case 'n':/* n : Volume name */
    sprintf(volume_name, "%-11.11s", optarg);
    for (i = 0; volume_name[i] && i < 11; i++)
/* don't know if here should be more strict !uppercase(label[i]) */
if (islower(volume_name[i])) {
    fprintf(stderr,
            "mkfs.fat: warning - lowercase labels might not work properly with DOS or Windows\n");
    break;
}

    break;

v4.2: https://github.com/dosfstools/dosfstools/blob/v4.2/src/mkfs.fat.c#L706:

    len = mbstowcs(NULL, volume_name, 0);
    if (len != (size_t)-1 && len > 11)
die("Label can be no longer than 11 characters");

How Has This Been Tested?

No test

Checklist:

• [ ] My code follows the style guidelines of this project
• [X] I have performed a self-review of my own code
• [] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [X] My changes generate no new warnings
• [ ] Any dependent changes have been merged and published in downstream modules

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