42 lines
1.2 KiB
Plaintext
42 lines
1.2 KiB
Plaintext
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#!/bin/sh
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# This script replaces the default busybox init process to avoid having that
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# process staying alive and sleeping in the background, (uselessly) consuming
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# precious memory.
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# Mount procfs and sysfs
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/bin/mount -t proc proc /proc
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/bin/mount -t sysfs sysfs /sys
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# When the kernel is directly booted, devtmpfs is not automatically mounted.
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# Manually mount it if needed.
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devmnt=$(mount | grep -c devtmpfs)
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if [ ${devmnt} -eq 0 ]; then
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/bin/mount -t devtmpfs devtmpfs /dev
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fi
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# Use the /dev/console device node from devtmpfs if possible to not
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# confuse glibc's ttyname_r().
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# This may fail (E.G. booted with console=), and errors from exec will
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# terminate the shell, so use a subshell for the test
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if (exec 0</dev/console) 2>/dev/null; then
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exec 0</dev/console
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exec 1>/dev/console
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exec 2>/dev/console
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fi
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# Clear memory to reduce page fragmentation
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echo 3 > /proc/sys/vm/drop_caches
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# Print a fun logo :)
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echo " __ _"
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echo " / / (_) ____ _ _ __ __"
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echo " / / | || _ \\ | | | |\\ \\/ /"
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echo " / /___| || | | || |_| | > < "
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echo " /_____/|_||_| |_| \\____|/_/\\_\\"
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echo " 64-bits RISC-V Kendryte K210 NOMMU"
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echo ""
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# Finally, let's start an interactive shell
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exec /bin/sh
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