growfs_fstab: add new /etc/rc.d script to add swap to fstab
The growfs_fstab script is a helper for the growfs script to add any new swap partition to /etc/fstab on first boot. If growfs adds a swap partition, it sets growfs_swap_pdev in the kenv. In this case, after the root file system is read/write, if there is no swap partition in the fstab, growfs_fstab adds growfs_swap as a swap partition to the fstab. Also, it runs dumpon to add the swap partition (as this happened earlier in the startup sequence). Discussed with: cperciva Differential Revision: https://reviews.freebsd.org/D37463
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libexec/rc/rc.d/growfs_fstab
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67
libexec/rc/rc.d/growfs_fstab
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#!/bin/sh
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#
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# Copyright 2022 Michael J. Karels
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# $FreeBSD$
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#
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# PROVIDE: growfs_fstab
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# REQUIRE: growfs root
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# KEYWORD: firstboot
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# If the growfs script added a swap partition, then add a swap entry
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# to /etc/fstab if none exists, and add as dumpdev.
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. /etc/rc.subr
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name="growfs_fstab"
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desc="Add new swap partition to /etc/fstab"
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start_cmd="growfs_fstab_start"
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stop_cmd=":"
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rcvar="growfs_enable"
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growfs_fstab_start()
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{
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if kenv -q growfs_swap_pdev >/dev/null
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then
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if awk '
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/^#/ { next }
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$3 == "swap" { exit 1 }
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' < /etc/fstab
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then
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printf "/dev/label/growfs_swap\tnone\t\tswap\tsw\t\t0\t0\n" >>/etc/fstab
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case "$dumpdev" in
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[Aa][Uu][Tt][Oo])
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dumpon $dumpon_flags /dev/label/growfs_swap
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;;
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*)
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;;
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esac
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fi
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fi
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}
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load_rc_config $name
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run_rc_command "$1"
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