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68 lines
2.1 KiB
Bash
Executable file
68 lines
2.1 KiB
Bash
Executable file
#!/bin/sh
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if [ "$EUID" -ne 0 ]; then
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echo "Must be ran as root"
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exit
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fi
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# Take user on the chrooted machine as 1st argument,
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# this will be the logged user after chroot,
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# default to root if none provided
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if [ $# -ge 1 ]; then
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USERNAME="$1"
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else
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USERNAME="root"
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fi
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MOUNT_POINT="/mnt/gentoo"
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CLIENT_SCRIPT="/usr/local/bin/chroot-client"
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# Make sure the partition is mounted according to fstab
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mount "$MOUNT_POINT" 2> /dev/null
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# Mount necessary directories for chroot to be possible
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mount --types proc /proc "$MOUNT_POINT/proc"
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mount --rbind /sys "$MOUNT_POINT/sys"
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mount --make-rslave "$MOUNT_POINT/sys"
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mount --rbind /dev "$MOUNT_POINT/dev"
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mount --make-rslave "$MOUNT_POINT/dev"
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# Chroot with custom script, if aviable
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if [ -f "$MOUNT_POINT/$CLIENT_SCRIPT" ]; then
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chroot "$MOUNT_POINT" "$CLIENT_SCRIPT" "$USERNAME"
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else
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# If we didn't find the script in the chroot environment
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# try to find it in this mahcine and copy it over
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if [ -f "$CLIENT_SCRIPT" ]; then
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echo "Client script not in chroot environment, copying"
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mkdir -p "$MOUNT_POINT/$(dirname $CLIENT_SCRIPT)"
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cp "$CLIENT_SCRIPT" "$MOUNT_POINT/$CLIENT_SCRIPTt"
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chroot "$MOUNT_POINT" "$CLIENT_SCRIPT" "$USERNAME"
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else
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echo "Unable to run chroot client script, proceeding manually"
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echo "You may need to run 'source /etc/profile' afterwards"
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# Try to obtain chroot user's default shell from /etc/passwd
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awkstring="BEGIN { FS=\":\" } /$USERNAME/ { print \$7 }"
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shell="$(cat /etc/passwd | awk "$awkstring")"
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if [ -n "$shell" ]; then
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echo "Found user's shell, trying to chroot with it ($shell)"
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chroot "$MOUNT_POINT" "$shell" --login
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else
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echo "Unable to find user in chroot's /etc/passwd, using root with bash shell"
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chroot "$MOUNT_POINT" "/bin/bash" --login
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fi
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fi
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fi
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# Unmount recursively mounted directories
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umount -l "$MOUNT_POINT/dev{/shm,/pts,}"
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umount -R "$MOUNT_POINT"
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# Remount partition accordingly to fstab
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# (the above umountings will unmount gentoo completely,
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# which means that remounting is necessary)
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mount "$MOUNT_POINT"
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