a52a4fdc24
when unmounting tmpfs file systems at shutdown time, avoid unmounting a tmpfs created by init on /dev - behaviour overridable from rc.conf. By default all tmpfs that have device nodes are not mounted.
76 lines
1.6 KiB
Bash
Executable File
76 lines
1.6 KiB
Bash
Executable File
#!/bin/sh
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#
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# $NetBSD: swap1,v 1.13 2018/10/19 14:11:12 martin Exp $
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#
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# PROVIDE: localswap
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# REQUIRE: DISKS root
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# KEYWORD: shutdown
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$_rc_subr_loaded . /etc/rc.subr
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name="swap1"
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start_cmd="swap1_start"
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stop_cmd="swap1_stop"
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dev_free_tmpfs()
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{
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# Generate a list of tmpfs filesystems that contain no device nodes,
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# which can presumably be unmounted safetly at shutdown time.
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# Filenames are quoted and the list contains no unquoted newlines,
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# so that the output can be reparsed as a single argument list.
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mount -t tmpfs | while read -r line
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do
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fs=${line#tmpfs on }
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fs=${fs% type tmpfs*}
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find -x "${fs}" \( -type b -or -type c \) -exit 1 &&
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echo -n "'${fs}' "
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done
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}
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umount_vm_consumers()
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{
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case ${swapoff_umount} in
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auto)
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swapoff_umount_fs="$(dev_free_tmpfs)"
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;;
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manual)
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# swapoff_umount_fs set manually
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;;
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esac
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# eval so that quotes within $swapoff_umount_fs are parsed properly
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eval set -- "${swapoff_umount_fs}"
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for fs in "$@"
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do
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echo "Forcibly unmounting ${fs}"
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umount -ft tmpfs "${fs}"
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done
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}
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# Add all block-type swap devices; these might be necessary
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# during disk checks.
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#
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swap1_start()
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{
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# Treat exit status 2 from swapctl(8) as successful; it means
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# "no error, but no suitable swap devices were configured".
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#
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if ! checkyesno no_swap; then
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swapctl -A -t blk || [ $? = 2 ]
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fi
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}
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# Remove all block-type swap devices
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#
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swap1_stop()
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{
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if checkyesno swapoff || [ -n "$rc_force" ]; then
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umount_vm_consumers
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echo "Removing block-type swap devices"
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swapctl -U -t blk || [ $? = 2 ]
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fi
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}
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load_rc_config swap
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run_rc_command "$1"
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