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* win32: code shrink system drive handling (2)Ron Yorston2024-07-071-1/+1
| | | | | | Now that get_system_drive() no longer returns a NULL pointer on error chdir_system_drive() needs to check for an empty string instead.
* win32: code shrink system drive handlingRon Yorston2024-07-075-35/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | A previous commit (e3bfe3695) revised the use of getsysdir() to obtain the system directory, and hence the system drive. See the commit message for the history to that point. Further improvements are possible: - Remove getsysdir() and push the calls to GetSystemDirectory() down into get_system_drive() and get_proc_addr(). - Check the return value of GetSystemDirectory(). It's unlikely to fail, but better safe than sorry. - Instead of making all callers of get_system_drive() check for a NULL return value always return a non-NULL pointer. If the drive can't be found an empty string is returned instead (which is what the callers were using anyway). - The function need_system_drive() was only used in one place (in httpd). Move the code there and remove the function. - Use concat_path_file() where possible. Saves 76-144 bytes.
* ash: special hack for libtoolRon Yorston2024-07-071-0/+10
| | | | | | | | | | | | Libtool assumes the host environment is MSYS2 and will be confused by Windows-style command switches. The "/c" in "cmd /c" looks like a path, which MSYS2 incorrectly decodes to "c:/". Anticipating this, libtool encodes these calls as "cmd //c" which does not work outside MSYS2. A busybox-w32 patch makes it behave like MSYS2 in just this one case. Adds 88-96 bytes. (GitHub issue #297 and https://github.com/skeeto/w64devkit/issues/50)
* win32: properly restore BB_ env varsRon Yorston2024-07-021-1/+11
| | | | | | | | | | | | | | Some BB_ shell variables get special treatment: they're updated in the environment immediately on any change. One case was missed: if such a variable was unset or not exported and was overridden by a local variable it wasn't unset in the environment when the local variable went out of scope. Add the code required to do this. Adds 48-64 bytes. (GitHub issue #423)
* win32: don't allow BB_TERMINAL_MODE=6Ron Yorston2024-06-281-1/+1
| | | | | | | | The BB_TERMINAL_MODE variable is only documented to work for values between 0 and 5. Due to an oversight it also accepted the value 6. Like other unsupported values 6 is now replaced with the default value configured at build time.
* win32: add definition for old mingw-w64FRP-5398-g89ae34445Ron Yorston2024-06-251-0/+4
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* win32: code shrink exit_code_to_wait_status_cmd()Ron Yorston2024-06-241-4/+4
| | | | Saves 16 bytes.
* Merge branch 'busybox' into mergeRon Yorston2024-06-2334-155/+562
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| * typo fixDenys Vlasenko2024-06-012-2/+2
| | | | | | | | Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| * libbb: fix 64-bit bb_popcnt_longDenys Vlasenko2024-05-311-1/+1
| | | | | | | | Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| * libbb: add bit counting function, use where appropriateDenys Vlasenko2024-05-318-52/+66
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Although "naive" counting function is not too slow and is smaller, using it on e.g. each of 1024 words of CPU mask feels wrong. function old new delta bb_popcnt_32 - 52 +52 get_prefix 323 321 -2 nproc_main 206 199 -7 d4_run_script 739 731 -8 ipcalc_main 533 507 -26 ------------------------------------------------------------------------------ (add/remove: 2/0 grow/shrink: 0/4 up/down: 52/-43) Total: 9 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| * nproc: prepare for arbitrarily large CPU masksDenys Vlasenko2024-05-315-27/+38
| | | | | | | | | | | | | | | | | | | | | | function old new delta get_malloc_cpu_affinity - 76 +76 nproc_main 216 206 -10 process_pid_str 250 206 -44 ------------------------------------------------------------------------------ (add/remove: 2/0 grow/shrink: 0/2 up/down: 76/-54) Total: 22 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| * lineedit: print prompt and editing operations to stderrDenys Vlasenko2024-04-131-28/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For shells, this is mandated by standards function old new delta input_backward 215 231 +16 read_line_input 3015 3028 +13 draw_custom 66 78 +12 put_cur_glyph_and_inc_cursor 149 159 +10 put_prompt_custom 47 56 +9 show_history 40 46 +6 input_tab 927 933 +6 input_delete 136 142 +6 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 8/0 up/down: 78/0) Total: 78 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| * docproc: avoid segfault during file closingYan Zhu2024-04-131-0/+1
| | | | | | | | | | | | | | | | | | In the function find_export_symbols, since the fopen file does not exit when it fails, there is a dereference problem in fclose(fp), which will cause a segmentation fault. Signed-off-by: Yan Zhu <zhuyan2015@foxmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| * awk: fix segfault when compiled by clangRon Yorston2024-03-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A 32-bit build of BusyBox using clang segfaulted in the test "awk assign while assign". Specifically, on line 7 of the test input where the adjustment of the L.v pointer when the Fields array was reallocated L.v += Fields - old_Fields_ptr; was out by 4 bytes. Rearrange to code so both gcc and clang generate code that works. Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
| * crond: log5 fix typo, replace log level '4' with '5'Jones Syue2024-03-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | log5() with crondlog(5, msg, va) seems making logging more consistent. function old new delta ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/0 up/down: 0/0) Total: 0 bytes Signed-off-by: Jones Syue <jonessyue@qnap.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
| * ash: fix handling of single-quoted strings in pattern substitutionDenys Vlasenko2024-02-265-0/+29
| | | | | | | | | | | | | | function old new delta subevalvar 1576 1588 +12 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| * ip link: support for the CAN netlinkDario Binacchi2024-02-263-11/+333
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I developed this application to test the Linux kernel series [1]. As described in it I could not use the iproute2 package since the microcontroller is without MMU. function old new delta do_set_can - 920 +920 packed_usage 34645 34908 +263 get_float_1000 - 164 +164 .rodata 105427 105539 +112 do_iplink 1313 1381 +68 ------------------------------------------------------------------------------ (add/remove: 2/0 grow/shrink: 3/0 up/down: 1527/0) Total: 1527 bytes cc: Marc Kleine-Budde <mkl@pengutronix.de> [1] https://marc.info/?l=linux-netdev&m=167999323611710&w=2 Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| * hush: detect when terminating "done"/"fi" is missingDenys Vlasenko2024-02-259-1/+22
| | | | | | | | | | | | | | | | | | | | function old new delta parse_stream 2271 2292 +21 .rodata 105408 105427 +19 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 40/0) Total: 40 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| * hush: set G.ifs sooner (prevents segfault)Denys Vlasenko2024-02-251-28/+34
| | | | | | | | | | | | | | | | | | | | | | function old new delta set_G_ifs - 151 +151 run_list 1024 1031 +7 run_pipe 1567 1445 -122 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/1 up/down: 158/-122) Total: 36 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| * ls: do not truncate username/groupname to 8 charsDenys Vlasenko2024-02-251-2/+2
| | | | | | | | | | | | | | function old new delta .rodata 105412 105408 -4 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
* | win32: code shrink BB_CRITICAL_ERROR_DIALOGSRon Yorston2024-06-232-2/+3
| | | | | | | | | | | | Rewrite the test for the value of BB_CRITICAL_ERROR_DIALOGS. Saves 16-48 bytes.
* | win32: only access mode argument of open(2) if requiredRon Yorston2024-06-221-3/+5
| | | | | | | | | | | | | | | | | | The wrapper function 'mingw_open()' should only read the optional third argument if the 'O_CREAT' flag bit is set. Adds 16 bytes. (GitHub issue #425)
* | win32: add env var to control error dialogsRon Yorston2024-06-226-2/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the environment variable BB_CRITICAL_ERROR_DIALOGS is set to 1 critical error dialogs are enabled. If unset or set to any other value they aren't. In either case the error messages introduced by commit 790e37727 (win32: revert 'don't set error mode') are issued. The shell exports BB_CRITICAL_ERROR_DIALOGS to the environment immediately on any change so the setting takes effect at once. Adds 104-160 bytes. (GitHub issue #423)
* | win32: revert 'don't set error mode'Ron Yorston2024-06-222-29/+68
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit eb376b5d1 (win32: don't set error mode) removed a call to SetErrorMode(SEM_FAILCRITICALERRORS). But the documentation says: Best practice is that all applications call the process-wide SetErrorMode function with a parameter of SEM_FAILCRITICALERRORS at startup. This is to prevent error mode dialogs from hanging the application. Doing this prevents the system from displaying useful information, though. The application should attempt to tell the user what went wrong. Reinstate the call to SetErrorMode() and try to provide an error message, at least for the situation mentioned in issue #423 and other similar cases. Adds 360-368 bytes. (GitHub issue #423)
* | ash: allow HISTFILE=/dev/null to work as intendedRon Yorston2024-06-191-3/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It was noted that setting HISTFILE=/dev/null in upstream BusyBox prevented shell history from being saved to a history file. This failed in busybox-w32 with an error from lseek(2). The lseek(2) wrapper was rather conservative in the file types it accepted. Allowing FILE_TYPE_CHAR makes it possible to seek on /dev/null, thus avoiding the issue with HISTFILE. In addition, the wrapper for open(2) now converts the Unix-style mode argument to Windows-style. (GitHub issue #425)
* | win32: code shrink APE detection; avoid UBRon Yorston2024-06-191-3/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | Detecting Actually Portable Executable binaries used a longer signature than seems necessary. Six characters should be enough for anyone. When right shifting a byte by 24 bits, cast it to unsigned to avoid undefined behaviour. Saves 24-32 bytes. (GitHub issue #424)
* | make: update default rulesRon Yorston2024-06-161-14/+49
| | | | | | | | | | | | | | | | | | | | | | | | | | The default rules were changed in the 2024 standard: - Fortran is no longer supported - The CC macro is set to 'c17' instead of 'c99' In addition to these changes, CC is set to 'cc' as a non-POSIX extension: on my system, at least, there isn't a 'c17' compiler. Adds 208-224 bytes.
* | win32: detect Actually Portable Executable binariesRon Yorston2024-06-161-15/+23
| | | | | | | | | | | | | | | | | | Check for the signature of Actually Portable Executable binaries and treat them as executable. Adds 40-64 bytes. (GitHub issue #424)
* | win32: don't set error modeRon Yorston2024-06-161-4/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit a8c63f25b3 (win32: improve filesystem detection and display) added a call to SetErrorMode(SEM_FAILCRITICALERRORS). This was on the strength of the documentation for GetVolumeInformation() which suggests that otherwise a message box will appear to prompt the user to put media in an empty floppy or CD drive. This would disrupt the expected behaviour of applets like 'df'. In practice it seems the call to SetErrorMode() is unnecessary. It also results in other errors going unreported. Remove the call to SetErrorMode(). Saves 8-20 bytes. (GitHub issue #423)
* | make: update for POSIX 2024Ron Yorston2024-06-146-27/+31
| | | | | | | | | | | | | | | | | | | | | | | | Now that POSIX.1-2024 has been released we can replace all references to the 202X draft standard with 2024. Make this change throughout the code and testsuite. The pragma 'posix_2024' has been added. 'posix_202x' remains as an alias for the same. The 2024 standard is enforced by default in POSIX mode.
* | win32: allow for trailing separator in PATHRon Yorston2024-06-144-38/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In recent versions of Windows the PATH environment variable has a trailing semicolon. This is insignificant to Windows because it's ignored. busybox-w32 conforms to the POSIX interpretation of PATH which treats an empty path element as denoting the current directory. As result, on these versions of Windows executables may by default be run from the current directory, contrary to usual Unix practice. Attempt to detect and remove the trailing semicolon on applet start up. If the user insists, they can add a trailing semicolon to the shell variable PATH and it will be respected in the conventional manner. Adds 88-112 bytes. (GitHub issue #422)
* | make: limit changes to pragmasRon Yorston2024-06-101-5/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The special target .PRAGMA could be used to set or reset pragmas. Doing anything other than setting pragmas very early in execution is likely to be problematic. Limit the abilities of .PRAGMA: - Specifying .PRAGMA with no prerequisites now does nothing: pragmas are not reset. - The posix_2017 and posix_202x pragmas can only be used to change the enforced POSIX level from the default. Any further attempt to change POSIX level results in a warning. Adds 16-32 bytes.
* | make: allow := macro assignment on command lineRon Yorston2024-06-081-14/+22
| | | | | | | | | | | | | | | | | | Only the forms of macro assignment required by POSIX were allowed on the command line. Add support for the non-POSIX := form too. Adds 16-24 bytes.
* | make: more changes for c:/path targetRon Yorston2024-06-051-4/+5
| | | | | | | | | | | | | | | | | | | | The previous commit failed to change an instance of find_char() to find_colon(). It isn't necessary to use find_char() to replace find_colon() in the non-Windows case: strchr(3) is sufficient. Adds 16-48 bytes.
* | make: restore check for c:/path targetRon Yorston2024-06-051-1/+23
| | | | | | | | | | | | | | | | | | | | Commit f9d10b2b6 (make: fix detection of target rules (take 2)) failed to include the function find_colon() which is used to skip targets of the form c:/path when checking for a target rule. Restore the function so Windows paths can be used as targets. Adds 48 bytes.
* | make: explicitly verify order of argumentsRon Yorston2024-06-041-7/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | POSIX requires macro assignments to precede targets on the command line. This requirement has been relaxed as a non-POSIX extension. Verify the constraint has been applied in POSIX mode. This ensures that the command: make --posix target A=1 fails before it tries to update the target. It also catches the case where POSIX mode had not been set with the --posix option or PDPMAKE_POSIXLY_CORRECT environment but was then set by the .POSIX special target in the makefile. In this case the command line was scanned for macro assignments without enforcing POSIX mode while targets were processed with POSIX mode enabled. Adds 96 bytes.
* | make: only reset getopt(3) if necessaryRon Yorston2024-06-031-2/+2
| | | | | | | | Only invoke GETOPT_RESET() if getopt(3) has actually been called.
* | make: ensure sufficient space in line bufferRon Yorston2024-06-021-7/+8
| | | | | | | | | | | | | | | | | | | | | | When using fgets(3) to read a line into a buffer it's necessary to ensure at least two characters are available in the buffer. Otherwise the read fails. (At least, it did when pdpmake was built using MSYS2 on Windows.) Adds 16 bytes to the 32-bit build. (GitHub pdpmake issue 44)
* | make: report POSIX 202X issue with includeRon Yorston2024-06-021-6/+12
| | | | | | | | | | | | | | | | | | | | | | Synchronising with upstream pdpmake showed that a test was missing from the BusyBox port. POSIX 202X doesn't specify what should happen if an include statement has no arguments. When the POSIX 202X standard is being enforced this is reported as an error. Adds 32 bytes.
* | make: restore warning about invalid macro nameRon Yorston2024-06-021-7/+9
| | | | | | | | | | | | | | | | | | | | | | | | Commit 90c5352a9 (make: change how macros are read from the environment) was intended to ignore environment variables with invalid names. It had the unintended consequence of also ignoring macros with invalid names defined in makefiles. This was because such macros can have the same level (3) as those imported from the environment. Rather than use the level to detect importing from the environment add a flag to indicate this circumstance.
* | make: move test for complex chain of macro assignmentsRon Yorston2024-06-011-14/+14
| | | | | | | | | | | | The test 'Complex chain of macro assignments' relies on recursive macro expansion. This is a POSIX 202X feature, so the test should be moved to the appropriate section of the test script.
* | make: fix detection of target rules (take 2)Ron Yorston2024-05-312-184/+177
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit d6b764116 (make: fix detection of target rules) checked for target rules before macro assignments. This failed for some Makefiles generated by autotools because partially defined macros were expanded while testing for a target rule. Revert to checking for macro assignments first, but try to detect if the proposed left hand side of the assignment might form part of a target rule with an inline command. Also handle the case where the ';' separator of the inline command has been obfuscated by putting it in a macro. Saves 128-160 bytes. (GitHub pdpmake issues 31, 44)
* | make: allow :::= macro assignment on command lineRon Yorston2024-05-292-16/+52
| | | | | | | | | | | | | | | | | | | | | | | | GNU make and bmake have different implementations for := macro assignment. In POSIX 202X these are supported by the forms ::= and :::= respectively. Only the former was supported on the pdpmake command line. Add the required support in process_macros() and update the usage message. Adds 48-64 bytes.
* | make: relax the test 'Return error if command fails'Ron Yorston2024-05-291-1/+1
| | | | | | | | | | The test 'Return error if command fails' needed an exit code of 2. POSIX only requires an exit code greater than 0.
* | make: fixes to -q optionRon Yorston2024-05-282-36/+43
| | | | | | | | | | | | | | | | | | | | | | | | The -q option returns an exit status to indicate if targets are up-to-date (0) or in need of updating (1) but without updating them. As an exception (imported from GNU make) build commands with a '+' prefix are executed. pdpmake didn't implement the exception. Doing so required moving handling of the -q option down into docmds(). Saves 48 bytes.
* | make: fixes to -t optionRon Yorston2024-05-282-33/+60
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The -t option (in general) causes targets to be touched instead of having build commands run to create them. There were two problems. The flag variable 'ssilent' in docmds was too small (uint8_t) to contain the value of 'dotouch' (uint32_t). Truncation of the value resulted in build commands being echoed when they shouldn't have been. The POSIX specification is unclear as to how build commands with a '+' prefix interact with touch. The rationale indicates that this feature was imported from GNU make, so the behaviour has been made to match what it does: if a '+' build command is run the target is not touched. The code has been rearranged to move the call to touch() up into docmds(). Adds 48 bytes.
* | make: improved support for POSIX levelsRon Yorston2024-05-275-5/+37
| | | | | | | | | | | | | | | | | | The default POSIX level to be enforced in strict mode is now a configuration option. Print details of supported POSIX levels in the usage message. Adds 56-64 bytes.
* | make: add posix_2017 pragmaRon Yorston2024-05-251-9/+40
| | | | | | | | | | | | | | | | | | | | | | | | The pragma 'posix_202x' causes the 202X POSIX standard to be enforced in POSIX mode. Add an equivalent 'posix_2017' for the 2017 standard. There's now a DEFAULT_POSIX_LEVEL preprocessor symbol to configure the default standard. This is hardcoded to the 2017 standard but it can also be set to 202X. Adds 48 bytes.
* | make: fix tests for BSDRon Yorston2024-05-241-4/+4
| | | | | | | | | | | | A couple of tests require backslashes to be escaped. The test for CURDIR should use 'pwd -P' to resolve symlinks.
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