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* build: automatically generate header dependenciesLibravatar Kelvin M. Klann2024-01-22
| | | | | | | | | | | | | | | | | | | | | | | | | Instead of manually specifying which source files depend on which headers, use compiler flags to automatically generate depfiles (.d), which declare the correct header (make) dependencies for each source file (.c). Use `-MMD` (which ignores system headers) to generate the dependencies and `-MP` to prevent make from complaining when a header file is removed while it is listed as a dependency in a depfile. If depfiles exist, just include them. If not, make each object file (.o) unconditionally depend on all header files in its source directory and in src/include, to ensure that rebuilds are done when needed. The latter case applies to the first build after `make clean` (which would build everything anyway) and when the compiler does not support generating depfiles. Note that both gcc and clang have supported these options for a long time. Misc: This depends on the changes from commit 5b1bd33c7 ("build: use full paths on compile/link targets", 2023-07-02) / PR #6158 to avoid issues with make dependency tracking.
* build: use full paths on compile/link targetsLibravatar Kelvin M. Klann2024-01-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This makes the compile commands clearer when building in parallel (with `make -j`) and ensures that `__FILE__` includes the full build-time path (relative to the root of the repository) whenever it is referenced, such as in failed assert() messages (currently the full path is only shown in errExit() messages). Example: Before: firejail: main.c:100: main: Assertion `1 == 2' failed. Error src/firecfg/main.c:100: main: malloc: Cannot allocate memory After: firejail: ../../src/firejail/main.c:100: main: Assertion `1 == 2' failed. Error ../../src/firecfg/main.c:100: main: malloc: Cannot allocate memory Commands used to search and replace: $ git grep -Ilz '^MOD_DIR =' -- '*Makefile' | xargs -0 -I '{}' \ sh -c "printf '%s\n' \"\$(sed -E \ -e 's|^MOD_DIR = src/(.*)|MOD = \\1\\nMOD_DIR = \$(ROOT)/src/\$(MOD)|' \ -e 's:^(PROG|SO) = [^.]+(\.so)?$:\\1 = \$(MOD_DIR)/\$(MOD)\2:' \ '{}')\" >'{}'" $ git grep -Ilz '^HDRS :=' -- '*.mk' | xargs -0 -I '{}' \ sh -c "printf '%s\n' \"\$(sed -E \ -e 's|wildcard (\*\..)|wildcard \$(MOD_DIR)/\\1|' '{}')\" >'{}'" Note: config.mk.in, src/fnettrace/Makefile and src/include/common.h were edited manually. This is a follow-up to #5871.
* update copyright 2024Libravatar netblue302024-01-12
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* Improve errExit error messagesLibravatar Kelvin M. Klann2023-06-28
| | | | | | | | | | | | | | | | | | | | | | | Changes: * Move msg to the end of errExit (right before perror(3p)) * Include the full file path (within the repository) * Add "()" to function name for clarity Before: Error malloc: main.c:123 main: Cannot allocate memory After: Error src/firejail/main.c:123 main(): malloc: Cannot allocate memory Note: This clarifies which is the exact file that the error message comes from, as there are many source files with the same name. For example: $ git ls-files 'src/*/main.c' | wc -l 20
* build: rename MOD vars to EXTRA varsLibravatar Kelvin M. Klann2023-06-24
| | | | | | | | | | | | | | | To make them less confusing, as they are extra dependencies, not files that are specific to the module. Commands used to search and replace: $ git grep -IFlz -e 'MOD_HDRS' -e 'MOD_OBJS' -- src | xargs -0 -I '{}' sh -c "printf '%s\n' \"\$(sed \ -e 's/MOD_HDRS/EXTRA_HDRS/g' \ -e 's/MOD_OBJS/EXTRA_OBJS/g' '{}')\" >'{}'" Added on commit f5b1ccaad ("makefiles: move extra deps into new MOD vars", 2022-05-07) / PR #5478.
* build: move MAKEFLAGS to config.mk.inLibravatar Kelvin M. Klann2023-06-24
| | | | | | | To reduce the amount of boilerplate in the makefiles. This amends commit 9789c263a ("build: disable all built-in implicit make rules", 2023-06-21) / PR #5864.
* build: disable all built-in implicit make rulesLibravatar Kelvin M. Klann2023-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use `make -r` to reduce unnecessary filesystem lookups. Overall, this appears to reduce the amount of implicit rule searches by ~93.3% (~97.5% compared to a8f01a383) for the default build and by ~83.3% (~99.3% compared to a8f01a383) for the "man" target (as an example): $ git show --pretty='%h %ai %s' -s a8f01a383 2023-06-20 05:26:23 +0000 Merge pull request #5859 from kmk3/build-remove-retpoline $ ./configure >/dev/null $ make clean >/dev/null && make --debug=i -j 4 | grep -F 'Trying implicit' | wc -l 6798 $ make clean >/dev/null && make --debug=i -j 4 man | grep -F 'Trying implicit' | wc -l 1085 # (in the previous commit) $ make clean >/dev/null && make --debug=i -j 4 | grep -F 'Trying implicit' | wc -l 2535 $ make clean >/dev/null && make --debug=i -j 4 man | grep -F 'Trying implicit' | wc -l 42 # (with this commit applied) $ make clean >/dev/null && make --debug=i -j 4 | grep -F 'Trying implicit' | wc -l 170 $ make clean >/dev/null && make --debug=i -j 4 man | grep -F 'Trying implicit' | wc -l 7 Environment: GNU make 4.4.1-2 on Artix Linux. Note: According to make(1p) in POSIX.1-2017, "If .SUFFIXES does not have any prerequisites, the list of known suffixes shall be cleared.", while "The result of setting MAKEFLAGS in the Makefile is unspecified." Commands used to search and replace: $ git ls-files -z -- '*Makefile*' | xargs -0 -I '{}' sh -c \ "printf '%s\n' \"\$(sed -E \ 's/^(.SUFFIXES:)/\1\nMAKEFLAGS += -r\n/' '{}')\" >'{}'"
* build: disable most built-in implicit make rulesLibravatar Kelvin M. Klann2023-06-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clear `.SUFFIXES:` to reduce unnecessary filesystem lookups. Overall, this appears to reduce the amount of implicit rule searches by ~62% for the default build and by ~96% for the "man" target (as an example): $ git checkout master >/dev/null 2>&1 $ git show --pretty='%h %ai %s' -s a8f01a383 2023-06-20 05:26:23 +0000 Merge pull request #5859 from kmk3/build-remove-retpoline $ ./configure >/dev/null $ make clean >/dev/null && make --debug=i -j 4 | grep -F 'Trying implicit' | wc -l 6798 $ make clean >/dev/null && make --debug=i -j 4 man | grep -F 'Trying implicit' | wc -l 1085 # (with this commit applied) $ make clean >/dev/null && make --debug=i -j 4 | grep -F 'Trying implicit' | wc -l 2535 $ make clean >/dev/null && make --debug=i -j 4 man | grep -F 'Trying implicit' | wc -l 42 Environment: GNU make 4.4.1-2 on Artix Linux. Commands used to search and replace: $ git ls-files -z -- '*Makefile*' | xargs -0 -I '{}' sh -c \ "printf '%s\n' \"\$(sed '1s/^/.SUFFIXES:\n/' '{}')\" >'{}'" See also commit f48886f25 ("build: mark most phony targets as such", 2023-02-01) / PR #5637.
* Update copyright to 2023 (#5664)Libravatar David Fetter2023-02-15
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* makefiles: deduplicate lib makefiles into so.mkLibravatar Kelvin M. Klann2022-11-21
| | | | | | | | | | | | | | | | | | | | The following makefiles are nearly identical, except for the main target name and for any extra headers that they might use: * src/libpostexecseccomp/Makefile * src/libtrace/Makefile * src/libtracelog/Makefile So move all of their (duplicated) code into a new src/so.mk file, and add an include of src/so.mk, which leaves only variables, and the includes of config.mk and src/so.mk in place. With this commit, CFLAGS and LDFLAGS are only defined/changed in the following files: * config.mk.in * src/common.mk * src/so.mk
* makefiles: deduplicate main target name into new SO varLibravatar Kelvin M. Klann2022-11-21
| | | | | | | | | Put the main target name into a new SO variable, put SO into a new TARGET variable, make "all" depend on `$(TARGET)` and replace every other occurrence of the main target name with `$(SO)`. On the makefiles that build shared objects, to make them more similar. With this commit, all of their targets are identical.
* makefiles: move extra deps into new MOD varsLibravatar Kelvin M. Klann2022-11-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | To make the makefiles more similar. That is, add the following new variables: * MOD_HDRS * MOD_SRCS * MOD_OBJS And move existing module-specific header and object dependencies into `MOD_HDRS` and `MOD_OBJS`, respectively. `MOD_SRCS` is added mostly for symmetry/consistency. Note: Use `MOD_` as a prefix instead of `EXTRA_` to avoid confusion, as the latter is currently used for global variables (such as `EXTRA_CFLAGS`), as opposed to module-specific variables. Note2: Add them directly into the HDRS/SRCS/OBJS variables to avoid cluttering the existing recipes with an extra variables unnecessarily. This also allows, for example, referencing all of the object dependencies with `$<` if `$(OBJS)` is the first dependency (at least in GNU make). Note3: Since HDRS/SRCS/OBJS use simple assignment (through `:=`), the MOD variables should appear before including src/common.mk (or src/so.mk).
* makefiles: expand HDRS, SRCS and OBJS immediatelyLibravatar Kelvin M. Klann2022-11-21
| | | | | | | | | | | | | | | | | | Use immediate expansion of the right-hand side (with `:=`) to set the variables to the output of the commands rather than to the (text of the) commands themselves. This should prevent deferred/lazy evaluation, which is something that might potentially result in the relevant files being looked up each time that HDRS and SRCS are evaluated. Commands used to search and replace: git grep -Ilz '^SRCS' -- src | xargs -0 -I '{}' \ sh -c "printf '%s\n' \"\$(sed \ -e 's/^HDRS =/HDRS :=/' \ -e 's/^SRCS =/SRCS :=/' \ -e 's/^OBJS =/OBJS :=/' '{}')\" >'{}'"
* makefiles: rename H_FILE_LIST and C_FILE_LISTLibravatar Kelvin M. Klann2022-11-21
| | | | | | | | | | | | | | | | | | | To HDRS and SRCS, respectively. To be more consistent with the OBJS variable. Misc: These names also appear to be more common from the makefiles that I've seen. Commands used to search and replace: git grep -IFlz -e H_FILE_LIST -e C_FILE_LIST -- src | xargs -0 -I '{}' sh -c "printf '%s\n' \"\$(sed \ -e 's/^H_FILE_LIST *=/HDRS =/' \ -e 's/\$(H_FILE_LIST)/\$(HDRS)/g' \ -e 's/^C_FILE_LIST *=/SRCS =/' \ -e 's/\$(C_FILE_LIST:/\$(SRCS:/g' \ '{}')\" >'{}'"
* makefiles: remove unused BINOBJS variableLibravatar Kelvin M. Klann2022-11-20
| | | | | | | | | | | | | | | | It is unclear what its intended purpose would be. Example: $ cat Makefile OBJS = a b c BINOBJS = $(foreach file, $(OBJS), $file) all: printf '"%s"\n' "$(BINOBJS)" $ make printf '"%s"\n' " ile ile ile" " ile ile ile" Added on commit 137985136 ("Baseline firejail 0.9.28", 2015-08-08).
* check for availability of symbols instead of glibc definesLibravatar Reiner Herrmann2022-10-23
| | | | in musl they are just redefines of the non-64 versions
* makefiles: add generated files as dependenciesLibravatar Kelvin M. Klann2022-06-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With the previous commit ("makefiles: stop failing when config.mk does not exist", 2022-06-23), make will not immediately fail when trying to build a target without having the proper compile-time flags (which are defined on common.mk). For example, when running the command below: make distclean && make It will throw an error only after (mis-)compiling multiple objects. So add a dependency on config.mk on every target that uses output variables (such as @NAME@ / $(NAME)) on its recipe. And add a dependency on config.sh on targets that call shell scripts that use output variables (such as @NAME@ / $NAME). Also, add a recipe for config.mk / config.sh telling to run ./configure, to make it a bit more obvious just in case. With this commit, make will abort earlier, by detecting that the config.mk / config.sh dependency does not exist. This happens before trying to execute the recipe. This also makes the dependencies more accurate, since if config.mk (which defines some CFLAGS) is changed, the CFLAGS may also have changed, so a target that uses CFLAGS should probably be considered out of date in this case anyway. Relates to #5140.
* makefiles: stop failing when config.mk does not existLibravatar Kelvin M. Klann2022-06-30
| | | | | | | | | | | | | | | | | | | This allows running `make clean` and `make distclean` (and possibly others) without having to run ./configure beforehand. Note that some packaging-related targets still depend on the existence of generated files. For example: * dist: config.mk * deb: config.sh Commands used to search and replace: $ git grep -Elz 'include *([^ ]*/)?config.mk' | xargs -0 -I '{}' \ sh -c "printf '%s\n' \ \"\$(sed -E 's|^include *(([^ ]*/)?config.mk)|-include \1|' '{}')\" >'{}'" Relates to #5140.
* build: reduce autoconf input files from 32 to 2Libravatar Kelvin M. Klann2022-06-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Configure summary: autoconf essentially only parses configure.ac and generates the configure script (that is, the "./configure" shell script). The latter is what actually checks what is available on the system and internally sets the value of the output variables. It then, for every filename foo in AC_CONFIG_FILES (and for every output variable name BAR in AC_SUBST), reads foo.in, replaces every occurrence of `@BAR@` with the value of the shell variable `$BAR` and generates the file foo from the result. After this, configure is finished and `make` could be executed to start the build. Now that (as of #5140) all output variables are only defined on config.mk.in and on config.sh.in, there is no need to generate any makefile nor any other mkfile or shell script at configure time. So rename every "Makefile.in" to "Makefile", mkdeb.sh.in to mkdeb.sh, src/common.mk.in to src/common.mk and leave just config.mk and config.sh as the files to be generated at configure time. This allows editing and committing all makefiles directly, without potentially having to run ./configure in between. Commands used to rename the makefiles: $ git ls-files -z -- '*Makefile.in' | xargs -0 -I '{}' sh -c \ "git mv '{}' \"\$(dirname '{}')/Makefile\"" Additionally, from my (rudimentary) testing, this commit reduces the time it takes to run ./configure by about 20~25% compared to commit 72ece92ea ("Transmission fixes: drop private-lib (#5213)", 2022-06-22). Environment: dash 0.5.11.5-1, gcc 12.1.0-2, Artix Linux, ext4 on an HDD. Commands used for benchmarking each commit: $ : >time_configure && ./configure && make distclean && for i in $(seq 1 10); do { time -p ./configure; } 2>>time_configure; done $ grep real time_configure | awk '{ total += $2 } END { print total/NR }'
* makefiles: deduplicate configure-time vars into new config.mk.inLibravatar Kelvin M. Klann2022-06-12
| | | | | | | | | | | Currently, the configure-time variables (that is, the ones that assign to placeholders, such as "@HAVE_MAN@", which are set/replaced at configure-time) are defined on multiple files (such as on Makefile.in and on common.mk.in). To avoid duplication, centralize these variables on a single file (config.mk.in) and replace all of the other definitions of them with an include of config.mk.
* 2022 copyright updateLibravatar netblue302022-01-07
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* makefiles: replace character class with plain charLibravatar Kelvin M. Klann2021-03-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When using the "wildcard" internal functions. This usage has been present since the first "real" commit in the repository: commit 137985136 ("Baseline firejail 0.9.28"). > H_FILE_LIST = $(sort $(wildcard *.[h])) > C_FILE_LIST = $(sort $(wildcard *.c)) There is only a single character (i.e.: "h") inside the character class, so its usage should make no functional difference. It may stem from a construct that could have originally looked something like this: C_FILE_LIST = $(sort $(wildcard *.[ch])) Which would match both the implementation files and the headers. From Section 4.4, [Using Wildcard Characters in File Names][1] of the GNU make manual: > A single file name can specify many files using wildcard characters. > The wildcard characters in make are ‘*’, ‘?’ and ‘[…]’, the same as in > the Bourne shell. For example, *.c specifies a list of all the files > (in the working directory) whose names end in ‘.c’. See also Section 2.13, [Pattern Matching Notation][2] of POSIX.1-2017. Commands used to search, replace and clean up: $ find . -name .git -prune -o -type f \ \( -name Makefile -o -name Makefile.in \ -o -name '*.mk' -o -name '*.mk.in' \) -print0 | xargs -0 grep -Fl '$(wildcard *.[h])' | tr '\n' '\000' | xargs -0 sed -i.bak -e \ 's/\$(wildcard \*.\[h\])/$(wildcard *.h)/' $ find . -name .git -prune -o -type f \ -name '*.bak' -exec rm '{}' + Note: To make sure that this doesn't actually change anything functionally, I built firejail-git (AUR) on Artix from master and from this commit and diffing the resulting files produced no output (other than showing changes related to the build timestamps). Misc: Reference to the previous makefile-related changes: commit 2465f9248 ("makefiles: make all, clean and distclean PHONY") / https://github.com/netblue30/firejail/pull/4024 [1]: https://www.gnu.org/software/make/manual/html_node/Wildcards.html [2]: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html
* makefiles: make all, clean and distclean PHONYLibravatar Kelvin M. Klann2021-03-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Avoid a stat() call for each affected target and also potentially speed up parallel builds. From the GNU make manual[1]: > Phony targets are also useful in conjunction with recursive > invocations of make (see Recursive Use of make). In this situation > the makefile will often contain a variable which lists a number of > sub-directories to be built. [...] > The implicit rule search (see Implicit Rules) is skipped for .PHONY > targets. This is why declaring a target as .PHONY is good for > performance, even if you are not worried about the actual file > existing. Commands used to search, replace and cleanup: $ find -type f -name '*Makefile.in' -exec sed -i.bak \ -e 's/^all:/.PHONY: all\nall:/' \ -e 's/^clean:/.PHONY: clean\nclean:/' \ -e 's/^distclean:/.PHONY: distclean\ndistclean:/' '{}' + $ find -type f -name '*Makefile.in.bak' -exec rm '{}' + [1]: https://www.gnu.org/software/make/manual/html_node/Phony-Targets.html
* makefiles: fix whitespaceLibravatar Kelvin M. Klann2021-03-01
| | | | | | | | With a fun little script: $ git ls-files -z -- '*Makefile*' | xargs -0 -I '{}' sh -c \ "test -s '{}' && printf '%s\n' \"\`git stripspace <'{}'\`\" >'{}'"
* copyright updateLibravatar startx20172021-02-15
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* build: add -fPIE to LDFLAGSLibravatar Reiner Herrmann2020-10-08
| | | | | | | according to GCC documentation (https://gcc.gnu.org/onlinedocs/gcc/Link-Options.html): "For predictable results, you must also specify the same set of options used for compilation (-fpie, -fPIE, or model suboptions) when you specify this linker option."
* move copyright to 2020 (part 2) (#3181)Libravatar glitsj162020-01-24
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* cleanup after scan-buildLibravatar netblue302019-10-31
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* fix previous commit, more seccomp testingLibravatar netblue302019-04-09
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* move copyright statement to 2019Libravatar smitsohu2019-02-07
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* cnt only used for debuggingLibravatar Reiner Herrmann2019-02-05
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* clear all warnings from cppcheck static code analysisLibravatar smitsohu2018-08-11
| | | | obtained with: cppcheck --enable=warning --force --inconclusive --quiet ~/firejail/src
* move copyright statement to 2018Libravatar startx20172018-01-14
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* Improve cross build support by using configured compiler instead of make defaultLibravatar Helmut Grohne2017-07-26
| | | | https://bugs.debian.org/869707
* Remove trailing whitespace from src/Libravatar Fred Barclay2017-05-24
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* copyright 2017Libravatar netblue302017-02-11
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* fixesLibravatar netblue302016-11-27
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* fixesLibravatar netblue302016-11-26
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* fix "PATH_MAX undeclared" error on musl systemsLibravatar Aleksey Manevich2016-08-07
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* Fix wrong pointer variable in stat64 wrapperLibravatar Thomas Jarosch2016-07-31
| | | | | | | | | If a program would have called stat() and then stat64(), the traced program probably would crash with a NULL pointer access on orig_stat64. I've checked for similiar glitches in the other wrappers -> they looked ok.
* compile fixesLibravatar netblue302016-07-10
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* Fix chdir bug in libtracelogLibravatar Aleksey Manevich2016-07-06
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* Fix problem with relative path in storage_find functionLibravatar Aleksey Manevich2016-02-10
| | | | | | | | | | | | | | | | storage_find function fails on relative path, so nothing reported to log when blacklisted file accessed by relative path. This is because CWD is NULL when realpath function called. How to reproduce: touch /home/user/somefile firejail --blacklist=somefile --tracelog cat somefile Solution: keep CWD value and set it before calling realpath. In order to do this: * new wrapper for chdir call, and variable to keep CWD added. * storage_find modified to chdir before calling realpath function. * order of storage_find and orig_* calls in syscall wrappers changed, to prevent error set by calls in storage_find leak outside. * condition for calling realpath changed to include double-slash and path without initial slash.
* TyposLibravatar Martin Carpenter2016-01-30
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* copyright 2016Libravatar netblue302016-01-13
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* Sort file lists to make build reproducibleLibravatar Reiner Herrmann2015-12-16
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* tracelog fixesLibravatar netblue302015-12-12
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* tracelog fixesLibravatar netblue302015-12-06
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* tracelog fixesLibravatar netblue302015-12-06
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* memory leakLibravatar netblue302015-12-06
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