46e3c94707
This one was suggested by enp@ for industrial use where some extra protection for the boot process might be quite desirable. If no syslinux ui was specified (the stock configuration paths ensure there is one) or if it was set to "none" explicitly, then there's no boot: prompt (let alone any menu). If there's a need to ensure that the boot process is not interruptable by Ctrl/Shift/Caps Lock/Scroll Lock.
95 lines
2.7 KiB
Makefile
95 lines
2.7 KiB
Makefile
ifdef BUILDDIR
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# in deciseconds
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DEFAULT_TIMEOUT = 90
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# prepare data for syslinux installation;
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# see also stage1/scripts.d/01-syslinux
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include $(BUILDDIR)/distcfg.mk
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ifndef BOOTLOADER
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$(error syslinux feature enabled but BOOTLOADER undefined)
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endif
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# UI is backed by modules in modern syslinux
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# (except for built-in text prompt)
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ifdef SYSLINUX_UI
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SYSLINUX_MODULES := $(SYSLINUX_MODULES) $(SYSLINUX_UI)
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else
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$(warning no syslinux ui configured, default is now none)
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SYSLINUX_UI := none
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endif
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# SUBPROFILES are considered SYSLINUX_CFG too
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# (note these can appear like stage2/live);
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# 01defaults.cfg is included indefinitely
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SYSLINUX_CFG := $(SYSLINUX_CFG) $(notdir $(SUBPROFILES)) defaults
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DSTDIR := $(BUILDDIR)/stage1/files/syslinux/.in
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# we can do SYSLINUX_{CFG,MODULES,FILES}
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# CFG have only cfg snippet
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# FILES have only filenames (absolute or relative to /usr/lib/syslinux/)
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# MODULES must have both cfg snippet and syslinux module filename
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# (and get included iff cfg snippet AND module exist)
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cfg = $(wildcard cfg.in/??$(1).cfg)
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# NB: list position determined by file numbering (*.cfg sorting)
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#
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# config snippets are copied into generated profile where they can
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# be also tested against syslinux modules (some can be unavailable);
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# we can't do tests right now since that implies host syslinux being
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# identical to build system one which might be not the case...
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#
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# have to piggyback parameters as we're running in host system yet,
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# and files involved will appear inside instrumental chroot
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#
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# arguments get evaluated before recipe body execution thus prep
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all: debug timeout
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@### proper text branding should be implemented
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@sed -i 's,@mkimage-profiles@,$(IMAGE_NAME),' $(DSTDIR)/*.cfg
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@echo $(SYSLINUX_MODULES) > $(DSTDIR)/modules.list
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@echo $(SYSLINUX_FILES) > $(DSTDIR)/syslinux.list
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# integerity check
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timeout: bootargs
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@if [ "$(SYSLINUX_TIMEOUT)" -ge 0 ] 2>/dev/null; then \
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TIMEOUT="$(SYSLINUX_TIMEOUT)"; \
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else \
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TIMEOUT="$(DEFAULT_TIMEOUT)"; \
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fi; \
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sed -i "s,@timeout@,$$TIMEOUT," $(DSTDIR)/*.cfg
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# pass over additional parameters, if any
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bootargs: clean
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@if [ -n "$(STAGE2_BOOTARGS)" ]; then \
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sed -i "s,@bootargs@,$(STAGE2_BOOTARGS)," $(DSTDIR)/*.cfg; \
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fi; \
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sed -i "s,@bootargs@,," $(DSTDIR)/*.cfg
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clean: copy
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@if [ "$(SYSLINUX_UI)" = gfxboot ]; then \
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sed -i "s,\^,," $(DSTDIR)/*.cfg; \
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fi
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copy: prep
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@cp -pLt $(DSTDIR) -- $(sort \
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$(foreach C,$(SYSLINUX_CFG),$(call cfg,$(C))) \
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$(foreach M,$(SYSLINUX_MODULES),$(call cfg,$(M))))
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prep:
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@mkdir -p $(DSTDIR)
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debug:
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@if [ -n "$(DEBUG)" ]; then \
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echo "** BOOTLOADER: $(BOOTLOADER)"; \
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echo "** SYSLINUX_UI: $(SYSLINUX_UI)"; \
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echo "** SYSLINUX_CFG: $(SYSLINUX_CFG)"; \
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echo "** SYSLINUX_FILES: $(SYSLINUX_FILES)"; \
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echo "** SYSLINUX_MODULES: $(SYSLINUX_MODULES)"; \
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fi
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endif
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