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* win32: save a few bytes in device file supportRon Yorston2018-03-231-35/+35
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* win32: allow use of shell's PRNG for /dev/urandomRon Yorston2018-03-222-5/+82
| | | | | | Allow either ISAAC or the shell's built-in pseudo-random number generator to be used for /dev/urandom. The latter is smaller so it's the default.
* win32: tighten up code slightly in isaac.cRon Yorston2018-03-221-13/+5
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* win32: small changes to reduce size of binaryRon Yorston2018-03-222-13/+8
| | | | | | | | Reduce the size of the binary by about 32 bytes: - use xzalloc to allocate static buffers so we don't have to initialise them; - avoid duplicated code in spawnveq.
* win32: don't test DLLs for executable formatRon Yorston2018-03-181-0/+5
| | | | | | | | | | | Moving detection of file formats from access(2) to stat(2) in commit 650f67507 was acknowledged to slow down stat. One problematic case is c:/windows/system32 which contains about 2000 DLLs and was found to slow 'ls' unacceptably. Treat DLLs as a special case in has_exec_format. See GitHub issue #101.
* win32: add a function to convert backslashes to slashesRon Yorston2018-03-181-11/+14
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* win32: try harder to get file attributesRon Yorston2018-03-171-0/+16
| | | | | | | | | Reading the attributes of files like c:/pagefile.sys fails with error code ERROR_SHARING_VIOLATION, which breaks 'ls'. If this happens try an alternative API call to get the attributes. See GitHub issue #101.
* win32: tidy up popen implementationRon Yorston2018-03-151-206/+75
| | | | | | | | | Make mingw_popen_fd sufficiently general that it can be used to implement the other two popen routines. mingw_popen now just creates a command line and passes it to mingw_popen_fd. The one call to mingw_popen2 has been replaced by a call to mingw_popen_fd.
* wget: add support for httpsRon Yorston2018-03-151-0/+103
| | | | | | | | | | | | | | | | Allow wget to support https URLs. Changes are: - Add mingw_popen2 which uses a named pipe to allow bidirectional communication with a child process; - Modify ssl_client to accept a WIN32 handle instead of a file descriptor as an argument; - Allow tls_get_random to open /dev/urandom; - Using the above changes implement a WIN32 version of spawn_ssl_client in wget. This closes GitHub issue #75. Also, enable authentication in wget.
* ash: remove special treatment of device filesRon Yorston2018-03-151-1/+3
| | | | | Since device files are now handled in mingw_open there's no need for any special treatment in ash redirection.
* win32: restrict visibility of special devicesRon Yorston2018-03-151-7/+24
| | | | | | | | | | | | | | | Handling of the special devices /dev/zero and /dev/urandom was inconsistent: - they could be used as arguments to 'cat' but not 'od'; - they could not be used in shell redirection. Restrict the use of these devices to two places: - as input files to 'dd' with the 'if=' argument; - internally within 'shred'. See GitHub issue #98.
* winansi: check for broken pipe in winansi_writeRon Yorston2018-03-091-7/+21
| | | | | | | write(2) is commonly used in applets like cat and tr so we should check for broken pipes there too. See issue #99.
* winansi: check for broken pipeRon Yorston2018-03-061-6/+29
| | | | | | | | | | | | | | Microsoft Windows doesn't support SIGPIPE and its support for the EPIPE error is somewhat inadequate. Most of the time a broken pipe leads to an EINVAL error which is misleading: $ yes hello | head -1 hello yes: Invalid argument Add a function to test for the underlying Windows error that indicates a broken pipe and set errno to EPIPE. Call this function in a few strategic places.
* winansi: changes to puts, fputs and fwriteRon Yorston2018-03-061-18/+3
| | | | | | | Rewrite winansi_puts using winansi_fputs and putchar. There's no need to use winansi_putchar. Improve error return values from winansi_fputs and winansi_fwrite.
* winansi: improve error return values in ANSI emulationRon Yorston2018-03-061-20/+23
| | | | Also tighten up the code slightly.
* winansi: create and use functions to test for consoleRon Yorston2018-03-061-51/+20
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* win32: squeeze a few bytes out of strftimeRon Yorston2018-03-051-4/+6
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* win32: use strchrnul from BusyBox in fnmatchRon Yorston2018-03-051-1/+5
| | | | | | BusyBox ensures that strchrnul is always available, either from the target platform or by including its own version. Therefore it isn't necessary for fnmatch to use its equivalent.
* win32: reduce amount of static dataRon Yorston2018-03-044-101/+127
| | | | | | | It appears that uninitialised static variables are placed in the data section rather than bss, increasing the size of the binary. Rewrite some code to reduce the amount of static data.
* Minor improvements to buildRon Yorston2018-03-021-2/+1
| | | | | | | | | | | | Exclude source files in libbb that aren't used by busybox-w32. This speeds up the build marginally. They can always be reinstated if necessary. Provide fake routines for everything in inode_hash.c so that it can be excluded. inode_hash.c is now unchanged from upstream. Use last_char_is in has_exe_suffix_or_dot. It doesn't save any bytes but it makes the code neater.
* win32: make has_exec_format staticRon Yorston2018-03-011-55/+55
| | | | The only other caller (in spawnveq) has been removed.
* win32: additional improvements to handling of executablesRon Yorston2018-02-281-10/+24
| | | | | | | | | | | | | Consistent processing of file extensions, as described in the previous commit, has been applied to the 'which' applet and the functions find_executable and mingw_spawn_interpreter. In spawnveq check that the file to be executed exists and is executable, and ensure that it won't have any extensions added by spawnve. It's intended that all files passed to spawnve should have their names fully specified. If this isn't the case the tests here will cause errors which will need to be fixed.
* win32: don't add extensions to filenames ending with a dotRon Yorston2018-02-281-1/+7
| | | | | | | A filename ending with a dot is a signal to spawnve not to try adding extensions but to use the name unmodified. The add_win32_extension function should follow the same rule.
* win32: fix code to check for file extensionsRon Yorston2018-02-271-1/+1
| | | | | The has_win_suffix function didn't check that the extension started with a '.'. As a result the shell was unable to execute cmd.exe.
* win32: move detection of file formats to stat(2)Ron Yorston2018-02-262-54/+77
| | | | | | | | | | | | | | | | | | | | | Move the code to detect shell scripts and binary executables from mingw_access to a separate function, has_exec_format. Call this function in do_lstat to decide whether to set the executable bits in the file mode. This will slow down stat but has a couple of advantages: - shell scripts are highlighted in ls output - the test applet can use stat(2) to detect executable files The new function is used to handle another corner case in spawnveq: binary executables without the usual .exe extension are only run by spawnve if the file name ends with '.'. Two minor changes: - file_is_win32_executable has been renamed add_win32_extension to clarify what it does - a call to file_is_executable has been removed from find_command in ash as it resulted in unhelpful error messages.
* win32: improvements to stat(2) emulationRon Yorston2018-02-261-25/+18
| | | | | | | Set all mode bits rather than just setting user modes and then extending them to group and other. Combine common code in mingw_fstat.
* win32: add support for batch filesRon Yorston2018-02-262-12/+59
| | | | | | | | Support batch files with .bat and .cmd extensions, similar to what's done for .exe and .com. Check extensions in the same order as Windows' spawn function: .com, .exe, .bat, .cmd.
* win32: make /dev/urandom more randomRon Yorston2018-02-233-2/+242
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* win32: handle /dev/zero and /dev/urandom in open and read functionsRon Yorston2018-02-222-3/+60
| | | | | | | | | | | | | | | | | | | | | | | Currently /dev/zero is handled as a special case in dd. Add hacks to the open and read functions in mingw.c to handle the zero and urandom devices. - Opening /dev/zero or /dev/urandom actually opens the special Windows file 'nul' which behaves like /dev/null. This allows manipulation of the file descriptor with things like seek and close - When /dev/zero or /dev/urandom is opened the resulting file descriptor is stored and used to override the behaviour of read. - No attempt is made to track duplicated file descriptors, so using these devices for redirections in the shell isn't going to work and won't be permitted. (Could be, but won't.) - Limited control of the special file descriptors is provided by allowing the internal variables to be changed. - The numbers from /dev/urandom aren't very random.
* win32: tailor inet_pton.c for use in busybox-w32Ron Yorston2018-02-221-11/+8
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* win32: import inet_pton.c from ISC BINDRon Yorston2018-02-221-231/+182
| | | | | | | | The copy of inet_pton.c imported from gnulib was licensed under GPL3 which is incompatible with the GPL2-only licence of BusyBox. Import an MPL2-licensed version of this file from ISC BIND git master as of this date.
* win32: import fsync(2) implementation from gnulibRon Yorston2018-02-212-0/+76
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* win32: use built-in shell for popen, if possibleRon Yorston2018-02-181-2/+12
| | | | | | | | | | | | | | | popen uses the shell to run the command provided. If BusyBox has been configured appropriately use the built-in shell for this. - Currently the only user of popen in busybox-w32 is awk, which uses it when piping to or from commands. - If the command is available as an applet the shell will use it. If a different version of the program is required the command will need to specify the full path. - This change means that popen will work even if no shell is present on the path. - Since the binary may have been run as sh.exe or awk.exe it's necessary to use the magic --busybox option.
* win32: add dummy sys/select.h required for pollRon Yorston2018-02-141-0/+0
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* win32: update poll implementation to match latest gnulib versionRon Yorston2018-02-131-209/+207
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* win32: always use safe API calls to manipulate environmentRon Yorston2018-02-131-100/+26
| | | | | | | | | | | It turns out that with the new toolchain safe API calls work on all all platforms. Even the original code from commit fa147bd7e works on Windows XP when built with the new tools. - Remove the unsafe environment manipulation via the environ array - Microsoft's putenv takes a copy of its argument so the string can be freed - Rewrite some routines and add more error checking
* date: support '-' format flag to remove zero paddingRon Yorston2017-12-091-0/+5
| | | | | | | The strftime provided by the Microsoft C runtime uses '#' as the format string flag to remove zero padding; glibc uses '-'. Support the use of the '-' flag for improved compatibility.
* win32: define statvfs as statfsRon Yorston2017-11-032-1/+3
| | | | | | df now uses statvfs instead of statfs. Support this by pretending that statfs *is* statvfs. Not really true but good enough for the present purpose.
* mingw: clarify that waitpid(-1, ...) is not supportedJohannes Schindelin2017-10-011-1/+1
| | | | | | | | | | | | | | | | | When passing -1 as pid to the waitpid() function, it is supposed to wait for *any* child to exit. That is a bit tough to emulate on Windows given that waitpid() returns only one pid, and if multiple children have exited, subsequent calls to waitpid() should produce all of their pids subsequently. Oh, and we would have to figure out which processes were spawned and remember that list. And then, it would still be possible for the children to exit in the meantime and for *another* process using the pid, as Windows reuses pids very, very quickly. So let's punt and simply state that we do not support that functionality. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Ron Yorston <rmy@pobox.com>
* win32: allow kill to send signal number 0Ron Yorston2017-09-271-0/+15
| | | | | | | According to the man page: If sig is 0, then no signal is sent, but existence and permission checks are still performed
* win32: improvements to implementation of kill(2)Ron Yorston2017-09-271-87/+94
| | | | | | | | | | | | | | | | | Extend the implementation of kill(2) so that: - Sending the TERM signal asks the target process to exit. As on Unix it may not comply. - Sending the KILL signal forcibly terminates the target process. - Using a negative pid treats the target process as a process group leader and signals it and all of its descendants. - Using a pid of zero treats the current process as a process group leader and signals it and all of its descendants. Signed-off-by: Ron Yorston <rmy@pobox.com>
* kill: use gentler method than TerminateProcess()Johannes Schindelin2017-09-271-1/+161
| | | | | | | | | | | | | | | As Git for Windows' source code recently learned, let's also avoid using TerminateProcess() in BusyBox-w32: it does not allow the killed processes' atexit() handlers to run. Instead, jump through a couple of hoops by injecting a remote thread that executes the ExitProcess() function. This allows the atexit() handlers to run, at which point the exit code of the process can already be queried via GetExitCodeProcess(), and appropriate action can be taken, such as killing child processes. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
* ps: add support for CPU and elapsed time columnsRon Yorston2017-09-013-2/+106
| | | | | | | | It may be necessary to run ps as administrator to get information about processes belonging to other users. The code to detect GetTickCount64 at run-time was imported from Git for Windows.
* ps: add parent process id as a supported columnRon Yorston2017-08-311-0/+1
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* win32/poll: avoid assumption that pointers are equivalent to longsJohannes Schindelin2017-08-311-1/+1
| | | | | | | | | This is a companion patch to 4319368c6 (Use gnulib poll, importing the version from git, 2012-03-30) (Git's implementation of IsConsoleHandle() was adjusted in the meantime). Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Ron Yorston <rmy@pobox.com>
* win32: further minor code shrinkRon Yorston2017-08-301-17/+11
| | | | | Remove the check for argv being NULL in spawnveq. It shouldn't ever succeed.
* win32: add a function to find executable on PATHRon Yorston2017-08-301-34/+30
| | | | | | The function find_executable is more generic than needed here: it can search for all matches on PATH whereas we only want the first. Implement find_first_executable to do that.
* win32: changes to treatment of scriptsRon Yorston2017-08-301-58/+36
| | | | | | | | | | | | | | | Simplify how scripts are detected by parse_interpreter. It now: - uses strtok to parse the line buffer; - returns any options as a single string, not an array of separate options; - returns both the full path of the interpreter and its name. When a script is detected the sequence is now: - if the path to the interpreter refers to an executable run that; - else look up the interpreter name as a applet (if so configured) and run the applet found; - else search for the interpreter name on PATH.
* win32: shrink code to detect .exe filesRon Yorston2017-08-302-22/+21
| | | | | | | | Add a function (has_exe_suffix) to replace explicit code to check if a filename ends with '.exe. or '.com'. Also shrink code that checks for '.exe' or '.com' on PATH in shell's find_command function.
* mingw: accommodate for BusyBox' assumptions about isatty()Johannes Schindelin2017-08-241-0/+27
| | | | | | | | | | | | | | | On Windows, isatty(fd) determines whether the file descriptor refers to a character device. The thing is: even NUL or a printer is a character device. BusyBox thinks, however, that isatty() only returns non-zero for an interactive terminal. So let's shadow isatty() by a version that answers the question BusyBox wants to have answered. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Ron Yorston <rmy@pobox.com>
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