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nanobsd: embedded: Calculate FAT type and scheme
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Authored by jlduran on Jan 30 2026, 7:44 PM.
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rG68f5e5b1244d: nanobsd: embedded: Calculate FAT type and scheme
Summary

Determine the FAT (MS-DOS) type (FAT32, FAT16, or FAT12) and partition
scheme (fat32lba or fat16b) based on partition size.

Accept any (NetBSD) strsuftoll(3)-compatible string, as the value will
be fed to makefs(8) "-s" in a future commit.

NANO_SLICE_FAT_SIZEs defined in sectors (ending with an "s") will not be
supported. As a workaround, the letter "b" (blocks) may be used.

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rG FreeBSD src repository
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Event Timeline

jlduran created this revision.Jan 30 2026, 7:44 PM
Herald added a subscriber: imp. · View Herald TranscriptJan 30 2026, 7:45 PM
jlduran requested review of this revision.Jan 30 2026, 7:45 PM
Harbormaster completed remote builds in B70245: Diff 170802.Jan 30 2026, 7:45 PM
jlduran added a child revision: D54976: nanobsd: embedded: Remove mtools dependency.Jan 30 2026, 7:45 PM
jlduran planned changes to this revision.Jan 31 2026, 7:30 PM
jlduran updated this revision to Diff 170925.Feb 1 2026, 4:36 AM
  • Implement a strsuftoll(3)-compatible function, as the value of NANO_SLICE_FAT_SIZE should be compatible with makefs(8) -s.
Harbormaster completed remote builds in B70311: Diff 170925.Feb 1 2026, 4:36 AM
jlduran edited the summary of this revision. (Show Details)Feb 1 2026, 4:40 AM
imp accepted this revision.Feb 1 2026, 5:40 AM
This revision is now accepted and ready to land.Feb 1 2026, 5:40 AM
Closed by commit rG68f5e5b1244d: nanobsd: embedded: Calculate FAT type and scheme (authored by jlduran). · Explain WhyMar 19 2026, 5:15 PM
This revision was automatically updated to reflect the committed changes.
jlduran added a commit: rG68f5e5b1244d: nanobsd: embedded: Calculate FAT type and scheme.

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PathSize
tools/
tools/
nanobsd/
embedded/
49 lines

Diff 173935

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tools/tools/nanobsd/embedded/common

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