35 行
916 B
Bash
Executable File
35 行
916 B
Bash
Executable File
#!/bin/bash
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# This script will accept a text file with standard u-boot commands and
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# load it to the U-Boot environment. The original environment is saved
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# in a backup file in the current directory
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PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
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BACKUP_FILE=u-boot_env-$$.bak
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if [ -z "$1" ]; then
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echo "Usage: $0 U-BOOT_ENV_FILE"
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exit 1
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fi
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# Backup existing U-Boot environment
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env fw_printenv > $BACKUP_FILE || exit 2
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# Check if the ethaddr variable is defined
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ethaddr=$(fw_printenv ethaddr 2> /dev/null)
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while read line
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do
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# Suppress the ethaddr overwrite warning
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[ -z "$ethaddr"] && [[ "$line" =~ "ethaddr" ]] && continue
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# ignore comments starting with '#'
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if [[ "$line" == *'#'* ]]; then
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line=$(echo $line | cut -d\# -f1)
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fi
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if [[ $line = *[^[:space:]]* ]]; then
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env fw_setenv $(echo $line | sed 's/=/ /') || exit 3
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fi
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done < "$1"
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