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This patch adds a --verbose argument to swapon and swapoff to make it
more compatible with the corresponding Linux' utilities. Note that our
swapon is verbose by default and has a --quiet argument to make it
quiet, so a --verbose argument on it's own does nothing at all.
* sutils/swapon.c (main): Handle -v argument.
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Add the same command line option as in util-linux' swapon to not
consider an error if the device/file of a swap entry in fstab does not
exist (and not when activating a device specified as argument to
`swapon').
* sutils/swapon.c (ifexists): New variable.
(options): Add the 'e' option.
(parse_opt) <'e'>: Handle case.
(swaponoff): New argument skipnotexisting.
Return 0 if open_store fails with ENOENT and SKIPNOTEXISTING is on.
(main): Adapt swaponoff calls with 0 as parameter for command line
arguments, and IFEXISTS for swap entries from fstab.
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* swapon.c (main, doc) [!SWAPOFF]: Unless overridden, consider a
swap signature when deciding whether to add a paging device or not.
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* swapon.c (swaponoff): Fix last change.
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* swapon.c (swaponoff): If get_privileged_ports fails with EPERM, try
to open /servers/default-pager instead.
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* swapon.c (check_signature): Use %zu for size_t arg.
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Use a new, more flexible RPC interface to the default pager.
This allows swapon to do its own interpretation of Linux swap
signature pages, and to support partial-device stores such as
store_open will return for regular files on disk filesystems.
* swapon.c: Include <hurd/default_pager.h>, not <mach/default_pager.h>.
(ignore_signature, require_signature, quiet): New variables.
(options): Add --silent, --no-signature, --require-signature.
(main: parse_opt): Parse them.
(check_signature): New function.
(swaponoff): Use it unless --no-signature set, to get a remapped store
using the pages indicated by the Linux signature page. Try new
default_pager_paging_storage RPC first, using a possibly-remapped
device store. If the default pager does not support that, fall back
to the old protocol that only supports whole devices (and wherein the
default pager itself interprets a Linux signature page).
* Makefile (swapon, swapoff): Depend on default_pagerUser.o.
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* swapon.c (swaponoff): Check for a null default pager port.
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* swapon.c: Support -a (reading fstab).
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* swapon.c (main): Fix return type to int, and use return.
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