# # Rules for running syntax-check, derived from gnulib's # maint.mk # # Copyright (C) 2008-2019 Red Hat, Inc. # Copyright (C) 2003-2019 Free Software Foundation, Inc. # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program. If not, see # . # This is reported not to work with make-3.79.1 # ME := $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST)) ME := $(_build-aux)/syntax-check.mk # These variables ought to be defined through the configure.ac section # of the module description. But some packages import this file directly, # ignoring the module description. AWK ?= awk GREP ?= grep SED ?= sed # Helper variables. _empty = _sp = $(_empty) $(_empty) # _equal,S1,S2 # ------------ # If S1 == S2, return S1, otherwise the empty string. _equal = $(and $(findstring $(1),$(2)),$(findstring $(2),$(1))) GIT = git VC = $(GIT) VC_LIST = $(srcdir)/$(_build-aux)/vc-list-files -C $(srcdir) # You can override this variable in syntax-check.mk if your gnulib submodule lives # in a different location. gnulib_dir ?= $(srcdir)/gnulib # You can override this variable in syntax-check.mk to set your own regexp # matching files to ignore. VC_LIST_ALWAYS_EXCLUDE_REGEX ?= ^$$ # This is to preprocess robustly the output of $(VC_LIST), so that even # when $(srcdir) is a pathological name like "....", the leading sed command # removes only the intended prefix. _dot_escaped_srcdir = $(subst .,\.,$(srcdir)) _dot_escaped_builddir = $(subst .,\.,$(builddir)) # Post-process $(VC_LIST) output, prepending $(srcdir)/, but only # when $(srcdir) is not ".". ifeq ($(srcdir),.) _prepend_srcdir_prefix = else _prepend_srcdir_prefix = | $(SED) 's|^|$(srcdir)/|' endif # In order to be able to consistently filter "."-relative names, # (i.e., with no $(srcdir) prefix), this definition is careful to # remove any $(srcdir) prefix, and to restore what it removes. _sc_excl = \ $(or $(exclude_file_name_regexp--$@),^$$) VC_LIST_EXCEPT = \ $(VC_LIST) | $(SED) 's|^$(_dot_escaped_srcdir)/||' \ | if test -f $(srcdir)/.x-$@; then $(GREP) -vEf $(srcdir)/.x-$@; \ else $(GREP) -Ev -e "$${VC_LIST_EXCEPT_DEFAULT-ChangeLog}"; fi \ | $(GREP) -Ev -e '($(VC_LIST_ALWAYS_EXCLUDE_REGEX)|$(_sc_excl))' \ $(_prepend_srcdir_prefix) # Override this in syntax-check.mk if you are using a different format in your # NEWS file. today = $(shell date +%Y-%m-%d) # Prevent programs like 'sort' from considering distinct strings to be equal. # Doing it here saves us from having to set LC_ALL elsewhere in this file. export LC_ALL = C ## --------------- ## ## Sanity checks. ## ## --------------- ## _cfg_mk := $(wildcard $(srcdir)/$(_build-aux)/syntax-check.mk) # Collect the names of rules starting with 'sc_'. syntax-check-rules := $(sort $(shell $(SED) -n \ 's/^\(sc_[a-zA-Z0-9_-]*\):.*/\1/p' $(srcdir)/$(ME) $(_cfg_mk))) .PHONY: $(syntax-check-rules) ifeq ($(shell $(VC_LIST) >/dev/null 2>&1; echo $$?),0) local-checks-available += $(syntax-check-rules) else local-checks-available += no-vc-detected no-vc-detected: @echo "No version control files detected; skipping syntax check" endif .PHONY: $(local-checks-available) # Arrange to print the name of each syntax-checking rule just before running it. $(syntax-check-rules): %: %.m sc_m_rules_ = $(patsubst %, %.m, $(syntax-check-rules)) .PHONY: $(sc_m_rules_) $(sc_m_rules_): @echo $(patsubst sc_%.m, %, $@) @date +%s.%N > .sc-start-$(basename $@) # Compute and print the elapsed time for each syntax-check rule. sc_z_rules_ = $(patsubst %, %.z, $(syntax-check-rules)) .PHONY: $(sc_z_rules_) $(sc_z_rules_): %.z: % @end=$$(date +%s.%N); \ start=$$(cat .sc-start-$*); \ rm -f .sc-start-$*; \ $(AWK) -v s=$$start -v e=$$end \ 'END {printf "%.2f $(patsubst sc_%,%,$*)\n", e - s}' < /dev/null # The patsubst here is to replace each sc_% rule with its sc_%.z wrapper # that computes and prints elapsed time. local-check := \ $(patsubst sc_%, sc_%.z, \ $(filter-out $(local-checks-to-skip), $(local-checks-available))) syntax-check: $(local-check) # We haven't converted all scripts to using gnulib's init.sh yet. _test_script_regex = \<\(init\|test-lib\)\.sh\> # Most developers don't run 'make distcheck'. We want the official # dist to be secure, but don't want to penalize other developers # using a distro that has not yet picked up the automake fix. # FIXME remove this ifeq (making the syntax check unconditional) # once fixed automake (1.11.6 or 1.12.2+) is more common. ifeq ($(filter dist%, $(MAKECMDGOALS)), ) local-checks-to-skip += sc_vulnerable_makefile_CVE-2012-3386 else distdir: sc_vulnerable_makefile_CVE-2012-3386.z endif # Files that should never cause syntax check failures. VC_LIST_ALWAYS_EXCLUDE_REGEX = \ (^(docs/(news(-[0-9]*)?\.html\.in|.*\.patch))|\.(po|fig|gif|ico|png))$$ # Functions like free() that are no-ops on NULL arguments. useless_free_options = \ --name=VBOX_UTF16_FREE \ --name=VBOX_UTF8_FREE \ --name=VBOX_COM_UNALLOC_MEM \ --name=VIR_FREE \ --name=qemuCapsFree \ --name=qemuMigrationCookieFree \ --name=qemuMigrationCookieGraphicsFree \ --name=sexpr_free \ --name=usbFreeDevice \ --name=virBandwidthDefFree \ --name=virBitmapFree \ --name=virCPUDefFree \ --name=virCapabilitiesFree \ --name=virCapabilitiesFreeGuest \ --name=virCapabilitiesFreeGuestDomain \ --name=virCapabilitiesFreeGuestFeature \ --name=virCapabilitiesFreeGuestMachine \ --name=virCapabilitiesFreeHostNUMACell \ --name=virCapabilitiesFreeMachines \ --name=virCgroupFree \ --name=virCommandFree \ --name=virConfFreeList \ --name=virConfFreeValue \ --name=virDomainActualNetDefFree \ --name=virDomainChrDefFree \ --name=virDomainControllerDefFree \ --name=virDomainDefFree \ --name=virDomainDeviceDefFree \ --name=virDomainDiskDefFree \ --name=virDomainEventCallbackListFree \ --name=virObjectEventQueueFree \ --name=virDomainFSDefFree \ --name=virDomainGraphicsDefFree \ --name=virDomainHostdevDefFree \ --name=virDomainInputDefFree \ --name=virDomainNetDefFree \ --name=virDomainObjFree \ --name=virDomainSmartcardDefFree \ --name=virDomainSnapshotObjFree \ --name=virDomainSoundDefFree \ --name=virDomainVideoDefFree \ --name=virDomainWatchdogDefFree \ --name=virFileDirectFdFree \ --name=virHashFree \ --name=virInterfaceDefFree \ --name=virInterfaceIpDefFree \ --name=virInterfaceObjFree \ --name=virInterfaceProtocolDefFree \ --name=virJSONValueFree \ --name=virLastErrFreeData \ --name=virNetMessageFree \ --name=virNWFilterDefFree \ --name=virNWFilterEntryFree \ --name=virNWFilterHashTableFree \ --name=virNWFilterIPAddrLearnReqFree \ --name=virNWFilterIncludeDefFree \ --name=virNWFilterObjFree \ --name=virNWFilterRuleDefFree \ --name=virNWFilterRuleInstFree \ --name=virNetworkDefFree \ --name=virNodeDeviceDefFree \ --name=virNodeDeviceObjFree \ --name=virObjectUnref \ --name=virObjectFreeCallback \ --name=virPCIDeviceFree \ --name=virSecretDefFree \ --name=virStorageEncryptionFree \ --name=virStorageEncryptionSecretFree \ --name=virStorageFileFreeMetadata \ --name=virStoragePoolDefFree \ --name=virStoragePoolObjFree \ --name=virStoragePoolSourceFree \ --name=virStorageVolDefFree \ --name=virThreadPoolFree \ --name=xmlBufferFree \ --name=xmlFree \ --name=xmlFreeDoc \ --name=xmlFreeNode \ --name=xmlXPathFreeContext \ --name=xmlXPathFreeObject # The following template was generated by this command: # make ID && aid free|grep '^vi'|sed 's/ .*//;s/^/# /' # N virBufferFreeAndReset # y virCPUDefFree # y virCapabilitiesFree # y virCapabilitiesFreeGuest # y virCapabilitiesFreeGuestDomain # y virCapabilitiesFreeGuestFeature # y virCapabilitiesFreeGuestMachine # y virCapabilitiesFreeHostNUMACell # y virCapabilitiesFreeMachines # N virCapabilitiesFreeNUMAInfo FIXME # y virCgroupFree # N virConfFree (diagnoses the "error") # y virConfFreeList # y virConfFreeValue # y virDomainChrDefFree # y virDomainControllerDefFree # y virDomainDefFree # y virDomainDeviceDefFree # y virDomainDiskDefFree # y virDomainEventCallbackListFree # y virDomainEventQueueFree # y virDomainFSDefFree # n virDomainFree # n virDomainFreeName (can't fix -- returns int) # y virDomainGraphicsDefFree # y virDomainHostdevDefFree # y virDomainInputDefFree # y virDomainNetDefFree # y virDomainObjFree # n virDomainSnapshotFree (returns int) # n virDomainSnapshotFreeName (returns int) # y virDomainSnapshotObjFree # y virDomainSoundDefFree # y virDomainVideoDefFree # y virDomainWatchdogDefFree # n virDrvNodeGetCellsFreeMemory (returns int) # n virDrvNodeGetFreeMemory (returns long long) # n virFree - dereferences param # n virFreeError # n virHashFree (takes 2 args) # y virInterfaceDefFree # n virInterfaceFree (returns int) # n virInterfaceFreeName # y virInterfaceIpDefFree # y virInterfaceObjFree # n virInterfaceObjListFree # y virInterfaceProtocolDefFree # y virJSONValueFree # y virLastErrFreeData # y virNWFilterDefFree # y virNWFilterEntryFree # n virNWFilterFree (returns int) # y virNWFilterHashTableFree # y virNWFilterIPAddrLearnReqFree # y virNWFilterIncludeDefFree # n virNWFilterFreeName (returns int) # y virNWFilterObjFree # n virNWFilterObjListFree FIXME # y virNWFilterRuleDefFree # n virNWFilterRuleFreeInstanceData (typedef) # y virNWFilterRuleInstFree # y virNetworkDefFree # n virNetworkFree (returns int) # n virNetworkFreeName (returns int) # n virNodeDevCapsDefFree FIXME # y virNodeDeviceDefFree # n virNodeDeviceFree (returns int) # y virNodeDeviceObjFree # n virNodeDeviceObjListFree FIXME # n virNodeGetCellsFreeMemory (returns int) # n virNodeGetFreeMemory (returns non-void) # y virSecretDefFree # n virSecretFree (returns non-void) # n virSecretFreeName (2 args) # n virSecurityLabelDefFree FIXME # n virStorageBackendDiskMakeFreeExtent (returns non-void) # y virStorageEncryptionFree # y virStorageEncryptionSecretFree # n virStorageFreeType (enum) # y virStoragePoolDefFree # n virStoragePoolFree (returns non-void) # n virStoragePoolFreeName (returns non-void) # y virStoragePoolObjFree # n virStoragePoolObjListFree FIXME # y virStoragePoolSourceFree # y virStorageVolDefFree # n virStorageVolFree (returns non-void) # n virStorageVolFreeName (returns non-void) # n virStreamFree # Avoid uses of write(2). Either switch to streams (fwrite), or use # the safewrite wrapper. sc_avoid_write: @prohibit='\&2; \ exit 1; } || : @prohibit=' flags G_GNUC_UNUSED' \ exclude='virSecurityDomainImageLabelFlags' \ halt='flags should be checked with virCheckFlags' \ $(_sc_search_regexp) @prohibit='^[^@]*([^d] (int|long long)|[^dg] long) flags[;,)]' \ halt='flags should be unsigned' \ $(_sc_search_regexp) # Avoid functions that should only be called via macro counterparts. sc_prohibit_internal_functions: @prohibit='vir(Free|AllocN?|ReallocN|(Insert|Delete)ElementsN|File(Close|Fclose|Fdopen)) *\(' \ halt='use VIR_ macros instead of internal functions' \ $(_sc_search_regexp) sc_prohibit_raw_virclassnew: @prohibit='virClassNew *\(' \ halt='use VIR_CLASS_NEW instead of virClassNew' \ $(_sc_search_regexp) # Avoid raw malloc and free, except in documentation comments. sc_prohibit_raw_allocation: @prohibit='^.[^*].*\<((m|c|re)alloc|free) *\([^)]' \ halt='use VIR_ macros from viralloc.h instead of malloc/free' \ $(_sc_search_regexp) # Avoid functions that can lead to double-close bugs. sc_prohibit_close: @prohibit='([^>.]|^)\<[fp]?close *\(' \ halt='use VIR_{FORCE_}[F]CLOSE instead of [f]close' \ $(_sc_search_regexp) @prohibit='\. sc_prohibit_ctype_h: @prohibit='^# *include *' \ halt='use Glib g_ascii_* function instead of ctype.h' \ $(_sc_search_regexp) # We have our own wrapper for mocking purposes sc_prohibit_canonicalize_file_name: @prohibit='\ are not required to be thread-safe sc_prohibit_libgen: @prohibit='( (base|dir)name *\(|include .libgen\.h)' \ halt='use functions from GLib, not ' \ $(_sc_search_regexp) # raw xmlGetProp requires some nasty casts sc_prohibit_xmlGetProp: @prohibit='\&2; \ exit 1; } || : # Like the above, but prohibit a newline at the end of a diagnostic. # This is subject to false positives partly because it naively looks for # `\n"', which may not be the end of the string, and also because it takes # two lines of context (the -A2) after the line with the function name. # FIXME: this rule might benefit from a separate function list, in case # there are functions to which this one applies but that do not get marked # diagnostics. sc_prohibit_newline_at_end_of_diagnostic: @$(VC_LIST_EXCEPT) | xargs $(GREP) -A2 -nE \ '\<$(func_re) *\(' /dev/null \ | $(GREP) '\\n"' \ && { echo '$(ME): newline at end of message(s)' 1>&2; \ exit 1; } || : # Look for diagnostics that lack a % in the format string, except that we # allow VIR_ERROR to do this, and ignore functions that take a single # string rather than a format argument. sc_prohibit_diagnostic_without_format: @{ $(VC_LIST_EXCEPT) | xargs \ $(GREP) -nE '\<$(func_re) *\(.*;$$' /dev/null; \ $(VC_LIST_EXCEPT) | xargs \ $(GREP) -A2 -nE '\<$(func_re) *\(.*,$$' /dev/null; } \ | $(SED) -rn -e ':l; /[,"]$$/ {N;b l;}' \ -e '/(vah_(error|warning))/d' \ -e '/\<$(func_re) *\([^"]*"([^%"]|"\n[^"]*")*"[,)]/p' \ | $(GREP) -vE 'VIR_ERROR' && \ { echo '$(ME): found diagnostic without %' 1>&2; \ exit 1; } || : # The strings "" and "%s" should never be marked for translation. # Files under tests/ and examples/ should not be translated. sc_prohibit_useless_translation: @prohibit='_\("(%s)?"\)' \ halt='found useless translation' \ $(_sc_search_regexp) @prohibit='\&2; \ exit 1; } || : # Enforce recommended preprocessor indentation style. sc_preprocessor_indentation: @if cppi --version >/dev/null 2>&1; then \ $(VC_LIST_EXCEPT) | $(GREP) -E '\.[ch](\.in)?$$' | xargs cppi -a -c \ || { echo '$(ME): incorrect preprocessor indentation' 1>&2; \ exit 1; }; \ else \ echo '$(ME): skipping test $@: cppi not installed' 1>&2; \ fi # Enforce similar spec file indentation style, by running cppi on a # (comment-only) C file that mirrors the same layout as the spec file. sc_spec_indentation: @if cppi --version >/dev/null 2>&1; then \ for f in $$($(VC_LIST_EXCEPT) | $(GREP) '\.spec\.in$$'); do \ $(SED) -e 's|#|// #|; s|%ifn*\(arch\)* |#if a // |' \ -e 's/%\(else\|endif\|define\)/#\1/' \ -e 's/^\( *\)\1\1\1#/#\1/' \ -e 's|^\( *[^#/ ]\)|// \1|; s|^\( */[^/]\)|// \1|' $$f \ | cppi -a -c 2>&1 | $(SED) "s|standard input|$$f|"; \ done | { if $(GREP) . >&2; then false; else :; fi; } \ || { echo '$(ME): incorrect preprocessor indentation' 1>&2; \ exit 1; }; \ else \ echo '$(ME): skipping test $@: cppi not installed' 1>&2; \ fi # Nested conditionals are easier to understand if we enforce that endifs # can be paired back to the if sc_makefile_conditionals: @prohibit='(else|endif)($$| *#)' \ in_vc_files='Makefile\.am' \ halt='match "if FOO" with "endif FOO" in Makefiles' \ $(_sc_search_regexp) # Long lines can be harder to diff; too long, and git send-email chokes. # For now, only enforce line length on files where we have intentionally # fixed things and don't want to regress. sc_prohibit_long_lines: @prohibit='.{90}' \ in_vc_files='\.arg[sv]' \ halt='Wrap long lines in expected output files' \ $(_sc_search_regexp) @prohibit='.{80}' \ in_vc_files='Makefile(\.inc)?\.am' \ halt='Wrap long lines in Makefiles' \ $(_sc_search_regexp) sc_copyright_format: @require='Copyright .*Red 'Hat', Inc\.' \ containing='Copyright .*Red 'Hat \ halt='Red Hat copyright is missing Inc.' \ $(_sc_search_regexp) @prohibit='Copyright [^(].*Red 'Hat \ halt='consistently use (C) in Red Hat copyright' \ $(_sc_search_regexp) @prohibit='\' \ halt='spell Red Hat as two words' \ $(_sc_search_regexp) # Prefer the new URL listing over the old street address listing when # calling out where to get a copy of the [L]GPL. Also, while we have # to ship COPYING (GPL) alongside COPYING.LESSER (LGPL), we want any # source file that calls out a top-level file to call out the LGPL # version. Note that our typical copyright boilerplate refers to the # license by name, not by reference to a top-level file. sc_copyright_usage: @prohibit=Boston,' MA' \ halt='Point to , not an address' \ $(_sc_search_regexp) @require='COPYING\.LESSER' \ containing='COPYING' \ halt='Refer to COPYING.LESSER for LGPL' \ $(_sc_search_regexp) @prohibit='COPYING\.LIB' \ halt='Refer to COPYING.LESSER for LGPL' \ $(_sc_search_regexp) # Some functions/macros produce messages intended solely for developers # and maintainers. Do not mark them for translation. sc_prohibit_gettext_markup: @prohibit='\&2; \ exit 1; } || : # We're intentionally ignoring a few warnings # # E501: Force breaking lines at < 80 characters results in # some really unnatural code formatting which harms # readability. # # W504: Knuth code style requires the operators "or" and "and" etc # to be at the start of line in a multi-line conditional. # This the opposite to what is normal libvirt practice. # FLAKE8_IGNORE = E501,W504 sc_flake8: @if [ -n "$(FLAKE8)" ]; then \ $(VC_LIST_EXCEPT) | $(GREP) '\.py$$' | xargs \ $(FLAKE8) --ignore $(FLAKE8_IGNORE) --show-source; \ else \ echo '$(ME): skipping test $@: flake8 not installed' 1>&2; \ fi # mymain() in test files should use return, not exit, for nicer output sc_prohibit_exit_in_tests: @prohibit='\ form. Except for external tools, # e.g. Python binding, examples and tools subdirectories. sc_prohibit_include_public_headers_brackets: @prohibit='# *include *' \ in_vc_files='\.[ch]$$' \ halt='Do not include libvirt/*.h in internal source' \ $(_sc_search_regexp) # is only needed in .c files; .h files do not need it since # .c files must include config.h before any other .h. sc_prohibit_config_h_in_headers: @prohibit='^# *include\>.*config\.h' \ in_vc_files='\.h$$' \ halt='headers should not include ' \ $(_sc_search_regexp) sc_prohibit_unbounded_arrays_in_rpc: @prohibit='<>' \ in_vc_files='\.x$$' \ halt='Arrays in XDR must have a upper limit set for ' \ $(_sc_search_regexp) sc_prohibit_atoi: @prohibit='\bato(i|f|l|ll|q) *\(' \ halt='Use virStrToLong* instead of atoi, atol, atof, atoq, atoll' \ $(_sc_search_regexp) sc_prohibit_wrong_filename_in_comment: @$(VC_LIST_EXCEPT) | $(GREP) '\.[ch]$$' | xargs awk 'BEGIN { \ fail=0; \ } FNR < 3 { \ n=match($$0, /[[:space:]][^[:space:]]*[.][ch][[:space:]:]/); \ if (n > 0) { \ A=substr($$0, RSTART+1, RLENGTH-2); \ n=split(FILENAME, arr, "/"); \ if (A != arr[n]) { \ print "in " FILENAME ": " A " mentioned in comments "; \ fail=1; \ } \ } \ } END { \ if (fail == 1) { \ exit 1; \ } \ }' || { echo '$(ME): The file name in comments must match the' \ 'actual file name' 1>&2; exit 1; } sc_prohibit_virConnectOpen_in_virsh: @prohibit='\bvirConnectOpen[a-zA-Z]* *\(' \ in_vc_files='tools/virsh-.*\.[ch]$$' \ halt='Use vshConnect() in virsh instead of virConnectOpen*' \ $(_sc_search_regexp) sc_require_space_before_label: @prohibit='^( ?)?[_a-zA-Z0-9]+:$$' \ in_vc_files='\.[ch]$$' \ halt='Top-level labels should be indented by one space' \ $(_sc_search_regexp) # Allow for up to three spaces before the label: this is to avoid running # into situations where neither this rule nor require_space_before_label # would apply, eg. a line matching ^[a-zA-Z0-9]+ :$ sc_prohibit_space_in_label: @prohibit='^ {0,3}[_a-zA-Z0-9]+ +:$$' \ in_vc_files='\.[ch]$$' \ halt='There should be no space between label name and colon' \ $(_sc_search_regexp) # Doesn't catch all cases of mismatched braces across if-else, but it helps sc_require_if_else_matching_braces: @prohibit='( else( if .*\))? {|} else( if .*\))?$$)' \ in_vc_files='\.[chx]$$' \ halt='if one side of if-else uses {}, both sides must use it' \ $(_sc_search_regexp) sc_curly_braces_style: @if $(VC_LIST_EXCEPT) | $(GREP) '\.[ch]$$' | xargs $(GREP) -nHP \ '^\s*(?!([a-zA-Z_]*for_?each[a-zA-Z_]*) ?\()([_a-zA-Z0-9]+( [_a-zA-Z0-9]+)* ?\()?(\*?[_a-zA-Z0-9]+(,? \*?[_a-zA-Z0-9\[\]]+)+|void)\) ?\{' \ /dev/null; then \ echo '$(ME): Non-K&R style used for curly braces around' \ 'function body' 1>&2; exit 1; \ fi; \ if $(VC_LIST_EXCEPT) | $(GREP) '\.[ch]$$' | xargs \ $(GREP) -A1 -En ' ((if|for|while|switch) \(|(else|do)\b)[^{]*$$' \ /dev/null | $(GREP) '^[^ ]*- *{'; then \ echo '$(ME): Use hanging braces for compound statements' 1>&2; exit 1; \ fi sc_prohibit_windows_special_chars_in_filename: @$(VC_LIST_EXCEPT) | $(GREP) '[:*?"<>|]' && \ { echo '$(ME): Windows special chars in filename not allowed' 1>&2; echo exit 1; } || : sc_prohibit_mixed_case_abbreviations: @prohibit='Pci|Usb|Scsi' \ in_vc_files='\.[ch]$$' \ halt='Use PCI, USB, SCSI, not Pci, Usb, Scsi' \ $(_sc_search_regexp) # Require #include in all files that call setlocale() sc_require_locale_h: @require='include.*locale\.h' \ containing='setlocale *(' \ halt='setlocale() requires ' \ $(_sc_search_regexp) sc_prohibit_empty_first_line: @$(VC_LIST_EXCEPT) | xargs awk 'BEGIN { fail=0; } \ FNR == 1 { if ($$0 == "") { print FILENAME ":1:"; fail=1; } } \ END { if (fail == 1) { \ print "$(ME): Prohibited empty first line" > "/dev/stderr"; \ } exit fail; }' sc_prohibit_paren_brace: @prohibit='\)\{$$' \ in_vc_files='\.[chx]$$' \ halt='Put space between closing parenthesis and opening brace' \ $(_sc_search_regexp) # C guarantees that static variables are zero initialized, and some compilers # waste space by sticking explicit initializers in .data instead of .bss sc_prohibit_static_zero_init: @prohibit='\bstatic\b.*= *(0[^xX0-9]|NULL|false)' \ in_vc_files='\.[chx](\.in)?$$' \ halt='static variables do not need explicit zero initialization'\ $(_sc_search_regexp) # FreeBSD exports the "devname" symbol which produces a warning. sc_prohibit_devname: @prohibit='\bdevname\b' \ exclude='sc_prohibit_devname' \ halt='avoid using devname as FreeBSD exports the symbol' \ $(_sc_search_regexp) sc_prohibit_system_error_with_vir_err: @prohibit='\bvirReportSystemError *\(VIR_ERR_' \ halt='do not use virReportSystemError with VIR_ERR_* error codes' \ $(_sc_search_regexp) # Rule to prohibit usage of virXXXFree within library, daemon, remote, etc. # functions. There's a corresponding exclude to allow usage within tests, # docs, examples, tools, src/libvirt-*.c, and include/libvirt/libvirt-*.h sc_prohibit_virXXXFree: @prohibit='\bvir(Domain|Network|NodeDevice|StorageVol|StoragePool|Stream|Secret|NWFilter|Interface|DomainSnapshot)Free\b' \ exclude='sc_prohibit_virXXXFree' \ halt='avoid using virXXXFree, use virObjectUnref instead' \ $(_sc_search_regexp) sc_prohibit_sysconf_pagesize: @prohibit='sysconf\(_SC_PAGESIZE' \ halt='use virGetSystemPageSize[KB] instead of sysconf(_SC_PAGESIZE)' \ $(_sc_search_regexp) sc_prohibit_virSecurity: @$(VC_LIST_EXCEPT) | $(GREP) 'src/qemu/' | \ $(GREP) -v 'src/qemu/qemu_security' | \ xargs $(GREP) -Pn 'virSecurityManager(?!Ptr)' /dev/null && \ { echo '$(ME): prefer qemuSecurity wrappers' 1>&2; exit 1; } || : sc_prohibit_pthread_create: @prohibit='\bpthread_create\b' \ exclude='sc_prohibit_pthread_create' \ halt='avoid using pthread_create, use virThreadCreate instead' \ $(_sc_search_regexp) sc_prohibit_not_streq: @prohibit='! *STRN?EQ *\(.*\)' \ halt='Use STRNEQ instead of !STREQ and STREQ instead of !STRNEQ' \ $(_sc_search_regexp) sc_prohibit_verbose_strcat: @prohibit='strncat\([^,]*,\s+([^,]*),\s+strlen\(\1\)\)' \ in_vc_files='\.[ch]$$' \ halt='Use strcat(a, b) instead of strncat(a, b, strlen(b))' \ $(_sc_search_regexp) # Ensure that each .c file containing a "main" function also # calls virGettextInitialize sc_gettext_init: @require='virGettextInitialize *\(' \ in_vc_files='\.c$$' \ containing='\
&2; exit 1; }; endef define _sc_search_regexp dummy=; : so we do not need a semicolon before each use; \ \ : Check arguments; \ test -n "$$prohibit" && test -n "$$require" \ && { msg='Cannot specify both prohibit and require' \ $(_sc_say_and_exit) } || :; \ test -z "$$prohibit" && test -z "$$require" \ && { msg='Should specify either prohibit or require' \ $(_sc_say_and_exit) } || :; \ test -z "$$prohibit" && test -n "$$exclude" \ && { msg='Use of exclude requires a prohibit pattern' \ $(_sc_say_and_exit) } || :; \ test -n "$$in_vc_files" && test -n "$$in_files" \ && { msg='Cannot specify both in_vc_files and in_files' \ $(_sc_say_and_exit) } || :; \ test "x$$halt" != x \ || { msg='halt not defined' $(_sc_say_and_exit) }; \ \ : Filter by file name; \ if test -n "$$in_files"; then \ files=$$(find $(srcdir) | $(GREP) -E "$$in_files" \ | $(GREP) -Ev '$(_sc_excl)'); \ else \ files=$$($(VC_LIST_EXCEPT)); \ if test -n "$$in_vc_files"; then \ files=$$(echo "$$files" | $(GREP) -E "$$in_vc_files"); \ fi; \ fi; \ \ : Filter by content; \ test -n "$$files" \ && test -n "$$containing" \ && { files=$$(echo "$$files" | xargs $(GREP) -l "$$containing"); } \ || :; \ test -n "$$files" \ && test -n "$$non_containing" \ && { files=$$(echo "$$files" | xargs $(GREP) -vl "$$non_containing"); } \ || :; \ \ : Check for the construct; \ if test -n "$$files"; then \ if test -n "$$prohibit"; then \ echo "$$files" \ | xargs $(GREP) $$with_grep_options $(_ignore_case) -nE \ "$$prohibit" /dev/null \ | $(GREP) -vE "$${exclude:-^$$}" \ && { msg="$$halt" $(_sc_say_and_exit) } \ || :; \ else \ echo "$$files" \ | xargs \ $(GREP) $$with_grep_options $(_ignore_case) -LE "$$require" \ | $(GREP) . \ && { msg="$$halt" $(_sc_say_and_exit) } \ || :; \ fi \ else :; \ fi || :; endef sc_avoid_if_before_free: @$(VC_LIST_EXCEPT) \ | $(GREP) -v useless-if-before-free \ | xargs \ $(srcdir)/$(_build-aux)/useless-if-before-free \ $(useless_free_options) \ && { printf '$(ME): found useless "if"' \ ' before "free" above\n' 1>&2; \ exit 1; } \ || : sc_cast_of_argument_to_free: @prohibit='\&2; \ exit 1; } \ || : # Error messages should not end with a period sc_error_message_period: @$(VC_LIST_EXCEPT) \ | xargs $(GREP) -nEA2 '[^rp]error *\(' /dev/null \ | $(GREP) -E '[^."]\."' \ && { echo '$(ME): found error message ending in period' 1>&2; \ exit 1; } \ || : # Don't use cpp tests of this symbol. All code assumes config.h is included. sc_prohibit_have_config_h: @prohibit='^# *if.*HAVE''_CONFIG_H' \ halt='found use of HAVE''_CONFIG_H; remove' \ $(_sc_search_regexp) # Nearly all .c files must include . However, we also permit this # via inclusion of a package-specific header, if syntax-check.mk specified one. # config_h_header must be suitable for grep -E. config_h_header ?= sc_require_config_h: @require='^# *include $(config_h_header)' \ in_vc_files='\.c$$' \ halt='the above files do not include ' \ $(_sc_search_regexp) # Print each file name for which the first #include does not match # $(config_h_header). Like grep -m 1, this only looks at the first match. perl_config_h_first_ = \ -e 'BEGIN {$$ret = 0}' \ -e 'if (/^\# *include\b/) {' \ -e ' if (not m{^\# *include $(config_h_header)}) {' \ -e ' print "$$ARGV\n";' \ -e ' $$ret = 1;' \ -e ' }' \ -e ' \# Move on to next file after first include' \ -e ' close ARGV;' \ -e '}' \ -e 'END {exit $$ret}' # You must include before including any other header file. # This can possibly be via a package-specific header, if given by syntax-check.mk. sc_require_config_h_first: @if $(VC_LIST_EXCEPT) | $(GREP) '\.c$$' > /dev/null; then \ files=$$($(VC_LIST_EXCEPT) | $(GREP) '\.c$$') && \ perl -n $(perl_config_h_first_) $$files || \ { echo '$(ME): the above files include some other header' \ 'before ' 1>&2; exit 1; } || :; \ else :; \ fi sc_prohibit_HAVE_MBRTOWC: @prohibit='\bHAVE_MBRTOWC\b' \ halt="do not use $$prohibit; it is always defined" \ $(_sc_search_regexp) # To use this "command" macro, you must first define two shell variables: # h: the header name, with no enclosing <> or "" # re: a regular expression that matches IFF something provided by $h is used. define _sc_header_without_use dummy=; : so we do not need a semicolon before each use; \ h_esc=`echo '[<"]'"$$h"'[">]'|$(SED) 's/\./\\\\./g'`; \ if $(VC_LIST_EXCEPT) | $(GREP) '\.c$$' > /dev/null; then \ files=$$($(GREP) -l '^# *include '"$$h_esc" \ $$($(VC_LIST_EXCEPT) | $(GREP) '\.c$$')) && \ $(GREP) -LE "$$re" $$files | $(GREP) . && \ { echo "$(ME): the above files include $$h but don't use it" \ 1>&2; exit 1; } || :; \ else :; \ fi endef # Prohibit the inclusion of assert.h without an actual use of assert. sc_prohibit_assert_without_use: @h='assert.h' re='\new(file => "/dev/stdin")->as_string'|sed 's/\?://g' # Note this was produced by the above: # _xa1 = \ #x(((2n?)?re|c(har)?|n(re|m)|z)alloc|alloc_(oversized|die)|m(alloc|emdup)|strdup) # But we can do better, in at least two ways: # 1) take advantage of two "dup"-suffixed strings: # x(((2n?)?re|c(har)?|n(re|m)|[mz])alloc|alloc_(oversized|die)|(mem|str)dup) # 2) notice that "c(har)?|[mz]" is equivalent to the shorter and more readable # "char|[cmz]" # x(((2n?)?re|char|n(re|m)|[cmz])alloc|alloc_(oversized|die)|(mem|str)dup) _xa1 = x(((2n?)?re|char|n(re|m)|[cmz])alloc|alloc_(oversized|die)|(mem|str)dup) _xa2 = X([CZ]|N?M)ALLOC sc_prohibit_xalloc_without_use: @h='xalloc.h' \ re='\<($(_xa1)|$(_xa2)) *\('\ $(_sc_header_without_use) sc_prohibit_cloexec_without_use: @h='cloexec.h' re='\<(set_cloexec_flag|dup_cloexec) *\(' \ $(_sc_header_without_use) sc_prohibit_posixver_without_use: @h='posixver.h' re='\' \ halt=$$(printf '%s\n' \ 'do not test the above HAVE_
_H symbol(s);' \ ' with the corresponding gnulib module, they are always true') \ $(_sc_search_regexp) sc_prohibit_defined_have_decl_tests: @prohibit='(#[ ]*ifn?def|\[ (]+HAVE_DECL_' \ halt='HAVE_DECL macros are always defined' \ $(_sc_search_regexp) # ================================================================== gl_other_headers_ ?= \ openat.h \ stat-macros.h # Perl -lne code to extract "significant" cpp-defined symbols from a # gnulib header file, eliminating a few common false-positives. # The exempted names below are defined only conditionally in gnulib, # and hence sometimes must/may be defined in application code. gl_extract_significant_defines_ = \ /^\# *define ([^_ (][^ (]*)(\s*\(|\s+\w+)/\ && $$2 !~ /(?:rpl_|_used_without_)/\ && $$1 !~ /^(?:NSIG|ENODATA)$$/\ && $$1 !~ /^(?:SA_RESETHAND|SA_RESTART)$$/\ and print $$1 # Create a list of regular expressions matching the names # of macros that are guaranteed to be defined by parts of gnulib. define def_sym_regex gen_h=$(gl_generated_headers_); \ (cd $(gnulib_dir)/lib; \ for f in *.in.h $(gl_other_headers_); do \ test -f $$f \ && perl -lne '$(gl_extract_significant_defines_)' $$f; \ done; \ ) | sort -u \ | $(SED) 's/^/^ *# *(define|undef) */;s/$$/\\>/' endef # Don't define macros that we already get from gnulib header files. sc_prohibit_always-defined_macros: @if test -d $(gnulib_dir); then \ case $$(echo all: | $(GREP) -l -f - $(abs_top_builddir)/Makefile) in $(abs_top_builddir)/Makefile);; *) \ echo '$(ME): skipping $@: you lack GNU grep' 1>&2; exit 0;; \ esac; \ regex=$$($(def_sym_regex)); export regex; \ $(VC_LIST_EXCEPT) \ | xargs sh -c 'echo $$regex | $(GREP) -E -f - "$$@"' \ dummy /dev/null \ && { printf '$(ME): define the above' \ ' via some gnulib .h file\n' 1>&2; \ exit 1; } \ || :; \ fi # ================================================================== # Prohibit checked in backup files. sc_prohibit_backup_files: @$(VC_LIST) | $(GREP) '~$$' && \ { echo '$(ME): found version controlled backup file' 1>&2; \ exit 1; } || : # Require the latest GFDL. Two regexp, since some .texi files end up # line wrapping between 'Free Documentation License,' and 'Version'. _GFDL_regexp = (Free ''Documentation.*Version 1\.[^3]|Version 1\.[^3] or any) sc_GFDL_version: @prohibit='$(_GFDL_regexp)' \ halt='GFDL vN, N!=3' \ $(_sc_search_regexp) cvs_keywords = \ Author|Date|Header|Id|Name|Locker|Log|RCSfile|Revision|Source|State sc_prohibit_cvs_keyword: @prohibit='\$$($(cvs_keywords))\$$' \ halt='do not use CVS keyword expansion' \ $(_sc_search_regexp) # This Perl code is slightly obfuscated. Not only is each "$" doubled # because it's in a Makefile, but the $$c's are comments; we cannot # use "#" due to the way the script ends up concatenated onto one line. # It would be much more concise, and would produce better output (including # counts) if written as: # perl -ln -0777 -e '/\n(\n+)$/ and print "$ARGV: ".length $1' ... # but that would be far less efficient, reading the entire contents # of each file, rather than just the last two bytes of each. # In addition, while the code below detects both blank lines and a missing # newline at EOF, the above detects only the former. # # This is a perl script that is expected to be the single-quoted argument # to a command-line "-le". The remaining arguments are file names. # Print the name of each file that does not end in exactly one newline byte. # I.e., warn if there are blank lines (2 or more newlines), or if the # last byte is not a newline. However, currently we don't complain # about any file that contains exactly one byte. # Exit nonzero if at least one such file is found, otherwise, exit 0. # Warn about, but otherwise ignore open failure. Ignore seek/read failure. # # Use this if you want to remove trailing empty lines from selected files: # perl -pi -0777 -e 's/\n\n+$/\n/' files... # require_exactly_one_NL_at_EOF_ = \ foreach my $$f (@ARGV) \ { \ open F, "<", $$f or (warn "failed to open $$f: $$!\n"), next; \ my $$p = sysseek (F, -2, 2); \ my $$c = "seek failure probably means file has < 2 bytes; ignore"; \ my $$last_two_bytes; \ defined $$p and $$p = sysread F, $$last_two_bytes, 2; \ close F; \ $$c = "ignore read failure"; \ $$p && ($$last_two_bytes eq "\n\n" \ || substr ($$last_two_bytes,1) ne "\n") \ and (print $$f), $$fail=1; \ } \ END { exit defined $$fail } sc_prohibit_empty_lines_at_EOF: @$(VC_LIST_EXCEPT) \ | xargs perl -le '$(require_exactly_one_NL_at_EOF_)' \ || { echo '$(ME): empty line(s) or no newline at EOF' 1>&2; \ exit 1; } \ || : # Perl block to convert a match to FILE_NAME:LINENO:TEST, # that is shared by two definitions below. perl_filename_lineno_text_ = \ -e ' {' \ -e ' $$n = ($$` =~ tr/\n/\n/ + 1);' \ -e ' ($$v = $$&) =~ s/\n/\\n/g;' \ -e ' print "$$ARGV:$$n:$$v\n";' \ -e ' }' prohibit_doubled_words_ = \ the then in an on if is it but for or at and do to # expand the regex before running the check to avoid using expensive captures prohibit_doubled_word_expanded_ = \ $(join $(prohibit_doubled_words_),$(addprefix \s+,$(prohibit_doubled_words_))) prohibit_doubled_word_RE_ ?= \ /\b(?:$(subst $(_sp),|,$(prohibit_doubled_word_expanded_)))\b/gims prohibit_doubled_word_ = \ -e 'while ($(prohibit_doubled_word_RE_))' \ $(perl_filename_lineno_text_) # Define this to a regular expression that matches # any filename:dd:match lines you want to ignore. # The default is to ignore no matches. ignore_doubled_word_match_RE_ ?= ^$$ sc_prohibit_doubled_word: @$(VC_LIST_EXCEPT) \ | xargs perl -n -0777 $(prohibit_doubled_word_) \ | $(GREP) -vE '$(ignore_doubled_word_match_RE_)' \ | $(GREP) . \ && { echo '$(ME): doubled words' 1>&2; exit 1; } \ || : # Except for shell files and for loops, double semicolon is probably a mistake sc_prohibit_double_semicolon: @prohibit='; *;[ {} \]*(/[/*]|$$)' \ in_vc_files='\.[chly]$$' \ exclude='\bfor *\(.*\)' \ halt="Double semicolon detected" \ $(_sc_search_regexp) _ptm1 = use "test C1 && test C2", not "test C1 -''a C2" _ptm2 = use "test C1 || test C2", not "test C1 -''o C2" # Using test's -a and -o operators is not portable. # We prefer test over [, since the latter is spelled [[ in configure.ac. sc_prohibit_test_minus_ao: @prohibit='(\ /dev/null \ || { fail=1; echo 1>&2 "$(ME): $$p uses proper_name_utf8"; }; \ done; \ test $$fail = 1 && \ { echo 1>&2 '$(ME): the above do not link with any ICONV library'; \ exit 1; } || :; \ fi # Warn about "c0nst struct Foo const foo[]", # but not about "char const *const foo" or "#define const const". sc_redundant_const: @prohibit='\bconst\b[[:space:][:alnum:]]{2,}\bconst\b' \ halt='redundant "const" in declarations' \ $(_sc_search_regexp) sc_const_long_option: @prohibit='^ *static.*struct option ' \ exclude='const struct option|struct option const' \ halt='add "const" to the above declarations' \ $(_sc_search_regexp) NEWS_hash = \ $$($(SED) -n '/^\*.* $(PREV_VERSION_REGEXP) ([0-9-]*)/,$$p' \ $(srcdir)/NEWS \ | perl -0777 -pe \ 's/^Copyright.+?Free\sSoftware\sFoundation,\sInc\.\n//ms' \ | md5sum - \ | $(SED) 's/ .*//') # Update the hash stored above. 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