AngePierreandClaude Opus 5
e0727d957b
The Jetson model string has spaces; emitted unquoted, eval ran its second word
as a command ("Jetson: command not found"). printf %q makes the output safe to
eval, which is how every other script consumes it.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
61 lines
2.2 KiB
Bash
Executable File
61 lines
2.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Prints the facts every other script branches on, one KEY=value per line, so a
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# caller can `eval "$(detect_platform.sh)"`.
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#
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# The point of the whole repo is that these differ between Jetsons and nothing is
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# assumed: the original Nano is tegra210 on L4T R32 (JetPack 4, Ubuntu 18.04,
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# CUDA 10.2), an Orin is tegra234 on R35/R36 (JetPack 5/6). One install procedure,
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# values read here, binaries built locally to match.
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set -euo pipefail
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# L4T release, e.g. "32.7.1" or "36.4.3". Two sources; the file is the reliable
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# one on every generation, the package is the cross-check.
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l4t=""
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if [[ -f /etc/nv_tegra_release ]]; then
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# "# R32 (release), REVISION: 7.1, ..." -> 32.7.1
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rel=$(sed -n 's/^# R\([0-9]*\).*REVISION: \([0-9.]*\).*/\1.\2/p' /etc/nv_tegra_release)
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l4t="$rel"
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fi
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if [[ -z "$l4t" ]] && command -v dpkg-query >/dev/null 2>&1; then
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l4t=$(dpkg-query --showformat='${Version}' -W nvidia-l4t-core 2>/dev/null \
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| sed 's/-.*//') || true
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fi
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major="${l4t%%.*}"
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# SoC family, from the device tree — the ground truth for what can run here.
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soc="unknown"
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if [[ -r /proc/device-tree/compatible ]]; then
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comp=$(tr '\0' '\n' < /proc/device-tree/compatible)
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case "$comp" in
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*tegra210*) soc="tegra210" ;; # Nano, TX1
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*tegra186*) soc="tegra186" ;; # TX2
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*tegra194*) soc="tegra194" ;; # Xavier
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*tegra234*) soc="tegra234" ;; # Orin
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*tegra264*) soc="tegra264" ;; # Thor
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esac
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fi
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model="unknown"
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[[ -r /proc/device-tree/model ]] && model=$(tr -d '\0' < /proc/device-tree/model)
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# JetPack generation follows from the L4T major, and it is what decides toolchain
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# and dependency names.
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case "$major" in
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32) jetpack="4" ;;
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35) jetpack="5" ;;
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36) jetpack="6" ;;
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38) jetpack="7" ;;
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*) jetpack="unknown" ;;
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esac
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# %q-escaped so a caller can `eval` the output safely: MODEL holds spaces
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# ("NVIDIA Jetson Orin Nano …"), which unquoted would make eval run "Jetson" as a
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# command.
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printf 'L4T=%q\n' "${l4t:-unknown}"
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printf 'L4T_MAJOR=%q\n' "${major:-unknown}"
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printf 'JETPACK=%q\n' "${jetpack}"
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printf 'SOC=%q\n' "${soc}"
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printf 'ARCH=%q\n' "$(uname -m)"
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printf 'MODEL=%q\n' "${model}"
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