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* src/configh.dos: Set MK_OS_DOS to 1
* src/*: Convert #if refs to __MSDOS__, to use MK_OS_DOS.
* gl/lib/*: Ditto.
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* configure.ac: Set MK_OS_W32 to 1 if we're on Windows32.
* src/config.h.W32: Ditto.
* mk/Windows32.mk: Ditto.
* src/makeint.h: Convert #if refs to WINDOWS32, to use MK_OS_W32.
* src/*: Ditto.
* src/w32/*: Ditto.
* gl/lib/*: Ditto.
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* src/makeint.h: Set MK_OS_VMS to 1 if we're on VMS.
* src/*: Convert all #if references to VMS, to use MK_OS_VMS.
* gl/lib/*: Ditto.
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There is a lot of specialized code for supporting AmigaOS and it has
not been maintained for a number of years. It's highly unlikely that
the latest versions even compile properly on AmigaOS anymore. After
requesting that someone step forward to own the maintenance of the
port in the GNU Make 4.4 release and getting no takers, I removed it.
* NEWS: Announce the removal.
* README.in: Remove README.Amiga reference.
* README.Amiga: Remove unused file.
* SCOPTIONS: Ditto.
* src/amiga.c: Ditto.
* src/amiga.h: Ditto.
* src/config.ami: Ditto.
* mk/Amiga.mk: Ditto.
* Makefile.am: Remove references to deleted files.
* Basic.mk.template: Ditto.
* maintMakefile: Ditto.
* src/commands.c: Remove ifdef'd Amiga code.
* src/default.c: Ditto.
* src/dir.c: Ditto.
* src/file.c: Ditto.
* src/function.c: Ditto.
* src/job.c: Ditto.
* src/job.h: Ditto.
* src/main.c: Ditto.
* src/os.h: Ditto.
* src/read.c: Ditto.
* src/remake.c: Ditto.
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* (all): Change http:// to https://
* README.W32: Remove invalid link to mingw.org.
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Original patch provided by Paul Eggert <eggert@cs.ucla.edu>.
GNU libc will generate a link-time warning if we use mktemp() even
though we are using it safely (we only use it with mkfifo()).
Avoid this and clean up some handling.
First, check all calls related to temporary files and exit with a
fatal error and a useful message if we can't obtain them. In some
situations it might be possible to continue with reduced capability
but it's not worth the effort.
On POSIX systems we can create anonymous temp files using O_TMPFILE
if it's supported, else if we're using the default location and we
have dup(2), we can use standard tmpfile() and get an FD from it.
If we need a named temp file and FILE* and we have mkstemp() we can
use that, else if we have fdopen() we can get a temp FD and open it.
If none of those are available all we can do is generate a temp name
then open it with fopen() which is not secure.
* src/makeint.h (get_tmpdir): Declare it for use elsewhere.
* src/misc.c (get_tmpdir): Make it public not static.
(get_tmptemplate): Simplify the implementation.
(get_tmppath): Only define this if we have to have it to avoid
warnings from GNU libc.
(get_tmpfd): Generate fatal errors on error.
(get_tmpfile): Ditto. Open files in "wb+" mode to match tmpfile().
Require a filename pointer (all callers want it).
* src/os.h (os_anontmp): Implement for posixos.c as well.
* src/posix.c (jobserver_setup): Don't use mktemp to avoid GNU libc
errors. Instead construct the FIFO name based on the PID.
(osync_setup): get_tmpfd() can't fail so don't check it.
(os_anontmp): If the system supports O_TMPFILE use it. If not, and
we want to create the temporary file in the default directory, we
can use tmpfile() then use dup() to copy the file descriptor.
* src/main.c (main): get_tmpfile() can't fail.
* src/vmsjobs.c (child_execute_job): get_tmpfile() can't fail.
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In C, a function declaration with () allows any set of arguments.
Use (void) to mean "no arguments".
* src/dep.h: Switch () to (void) for functions with no arguments.
* src/makeint.h: Ditto.
* src/os.h: Ditto.
* src/shuffle.h: Ditto.
* src/variable.h: Ditto.
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(jobserver_setup): Set job_root to true.
(jobserver_clear): if we're the root instance and we're using a
FIFO, unlink it. If we're not in a signal handler, free memory.
(jobserver_acquire_all): Call jobserver_clear().
(sync_root): Rename from sync_parent for consistency.
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Some POSIX systems do not allow locks to be taken on non-files, such
as pipes. This is a problem since very often make is invoked with
its stdout redirected to a pipe. Also, if stdout is redirected to a
file that already has a lock on it for some other reason (perhaps a
shared file such as /dev/null) it can cause a hang.
This means our previous method of locking stdout, although it had some
nice advantages, is not portable enough. Instead, use a temporary
file and take the lock on that. We pass the name of the file to child
make processes. On Windows we continue to use a shared mutex for
output sync.
Remove POSIX emulation functions like fcntl from Windows; instead
follow the lead of the jobserver and create an interface in os.h for
output sync, and move the OS-specific content to posixos.c and
w32os.c.
* NEWS: Add a note.
* src/makeint.h (ALL_SET): Check that all bits are set.
* src/os.h: Add bits for checking the state of stdin/stdout/stderr.
Add prototypes for OS-specific output sync methods.
* src/posixos.c (check_io_state): Determine the status of stdin,
stdout, stderr an return a suite of bits describing them.
(osync_enabled): If the global variable holding the FD of the lock
file (osync_handle) is valid return true.
(osync_setup): Create a temporary file and remember its name in a
global variable (osync_tmpfile), and set osync_handle.
(osync_get_mutex): If output sync is enabled, return the filename
of the lock file prefixed with "fnm:" to denote a filename.
(osync_parse_mutex): If the provided filename has the wrong format
disable output sync. Else open the lock file and set osync_handle.
(osync_clear): Close osync_handle. If we're the parent make, then
also unlink the temporary file.
(osync_acquire): Take a lock on the osync_handle descriptor.
(osync_release): Release the lock on the osync_handle descriptor.
(fd_set_append): Add APPEND mode to a file descriptor.
* src/w32/w32os.c: Perform the same actions as posixos.c, copying
the details from src/w32/compat/posixfcn.c. Use a mutex rather
than locking a temporary file.
* src/output.h: Remove all the OS-specific content.
* src/output.c: Remove all the OS-specific content.
(set_append_mode): Remove and replace with fd_set_append().
(sync_init): Remove and replace with check_io_state().
(acquire_semaphore): Remove and replace with osync_acquire().
(release_semaphore): Remove and replace with osync_release().
(setup_tmpfile): If the IO state is not obtained, get it. If stdout
and/or stderr are valid, set up a tempfile to capture them.
(output_init): Set io_state if not set already, and check it when
deciding whether to close stdout on exit.
* src/main.c (main): If we're syncing, set up the mutex using the
new osync_setup() / osync_parse_mutex() methods.
(prepare_mutex_handl_string): Replace with osync_parse_mutex().
(die): Call osync_clear().
* src/w32/compat/posixfcn.c: Remove implementations of fcntl(),
record_sync_mutex(), create_mutex(), and same_stream().
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The output sync feature wants a file descriptor not a FILE*. We were
using tmpfile() but this returns FILE* which means we needed to dup()
the descriptor then fclose() the original, which is just unnecessary
overhead for every command we run.
Create a get_tmpfd() method that returns a file descriptor directly
by using mkstemp() if available, else do the best we can.
Also allow anonymous temp files if the filename pointer is NULL.
This causes the file to be unlinked. On Windows this requires a
special open so add an os_anontmp() method to handle this.
* src/makeint.h: Add prototype for get_tmpfd().
* src/misc.c (get_tmpfd): If we have mkstemp() use that, else just
open(2). If we don't want to keep the filename, unlink the file.
(get_tmpfile): Use get_tmpfd() if we have fdopen(), else use fopen().
* src/output.c (output_tmpfd): Call get_tmpfd() with NULL.
* src/os.h (os_anontmp): On Windows make this a function, else fails.
* src/w32/compat/posixcfn.c (tmpfile): Move to w32os.c:os_anontmp().
* src/w32/w32os.c (os_anontmp): Create a temp file that will be deleted
when the process exits, and return a file descriptor to it.
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Using anonymous pipes for jobserver support has some advantages:
for example there is nothing on disk that needs to be cleaned up.
However it has many obscure problems, related to the fact that in
order for it to work we need to ensure these resources are properly
passed through to child processes that want to use the jobserver.
At the same time we don't want to pass the pipe to process which
DON'T know about the jobserver.
Other processes can open file descriptors which we then think are
our jobserver, but aren't. And, we open the pipe file descriptors
in blocking mode which doesn't work for all users.
See issues such as SV 57178, SV 57242, and SV 62397
To avoid these issues, use named pipes (on systems where they are
available) instead of anonoymous pipes. This simplifies many things:
we never need to pass open file descriptors to our children; they
can open the jobserver named pipe. We don't need to worry about
recursive vs. non-recursive children. Users don't have to "pass
through" the resources if they are invoking sub-makes. Each child
can open its own file descriptor and set blocking as needed.
The downside is the named pipe exists on disk and so must be cleaned
up when the "top-level" make instance exits.
In order to allow make to continue to be used in build systems where
older versions of GNU make, or other tools that want to use the
jobserver, but don't understand named pipes, introduce a new option
--jobserver-style that allows the user to choose anonymous pipes.
* NEWS: Announce the change and the --jobserver-style option.
* doc/make.1: Add --jobserver-style documentation.
* doc/make.texi (Special Variables): Add missing items to .FEATURES.
(Options Summary): Add --jobserver-style.
(POSIX Jobserver): Named pipes, changes to --jobserver-auth, and the
--jobserver-style option.
(Windows Jobserver): Document --jobserver-style for Windows.
* configure.ac: Check for mkfifo.
* src/config.h-vms.template: Undefined HAVE_MKFIFO.
* src/config.h.W32.template: Ditto.
* src/main.c: Add jobserver-style as a new command line option.
(main): Add jobserver-fifo to .FEATURES if supported. Pass the style
option to jobserver_setup().
* src/os.h (jobserver_setup): Accept a style string option.
* src/posixos.c (enum js_type): Enumeration of the jobserver style.
(js_type): Which style we are currently using.
(fifo_name): The path to the named pipe (if in use).
(jobserver_setup): If no style is given, or "fifo" is given, set up a
named pipe: get a temporary file and use mkfifo() on it, then open it
for reading and writing. If something fails fall back to anonymous
pipes.
(jobserver_parse_auth): Parse jobserver-auth to determine the style.
If we are using a named pipe, open it. If we're using anonymous pipes
ensure they're valid as before.
(jobserver_get_invalid_auth): Don't invalidate the jobserver when
using named pipes.
(jobserver_clear): Clean up memory used for named pipes.
(jobserver_acquire_all): Unlink the named pipe when done.
* src/w32/w32os.c (jobserver_setup): Check the style argument.
* tests/scripts/features/jobserver: Use --jobserver-style to test
the anonymous pipe behavior, and also test named pipe/semaphore
behavior. Check invalid jobserver-style options.
* tests/scripts/functions/shell: Use --jobserver-style to test the
anonymous pipe behavior, and also test named pipe/semaphore
behavior.
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Savannah issues such as SV 57242 and SV 62397 show how passing
references to closed file descriptors via the --jobserver-auth option
in MAKEFLAGS can lead to problematic outcomes.
When computing the child environment for a non-recursive shell, add
an extra option to MAKEFLAGS to disable the file descriptors for the
jobserver.
Unfortunately this doesn't modify the value of the make variable
MAKEFLAGS, it only modifies the value of the sub-shell environment
variable MAKEFLAGS. This can lead to confusion if the user is not
considering the distinction.
* src/makeint.h: Publish the jobserver-auth value. Add a global
definition of the name of the command line option.
* src/os.h (jobserver_get_invalid_auth): New function to return a
string invalidating the jobserver-auth option.
* src/w32/w32os.c (jobserver_get_invaid_auth): Implement it. On
Windows we use a semaphore so there's no need to invalidate.
* src/posixos.c (jobserver_parse_auth): If we parse the invalid
auth string, don't set up the jobserver.
(jobserver_get_invalid_auth): Return an invalid option.
* src/variable.h (target_environment): Specify if the target
environment is for a recursive shell or non-recursive shell.
* src/variable.c (target_environment): Move checking for MAKELEVEL
into the loop rather than doing it at the end.
Along with this, check for MAKEFLAGS and MFLAGS, and update them
based on whether we're invoking a recursive or non-recursive child,
and also on whether it's necessary to invalidate the jobserver.
* src/function.c (func_shell_base): Shell functions can never be
recursive to pass 0 to target_environment().
* src/job.c (start_job_command): Specify whether the child is
recursive when calling target_environment().
* src/main.c: Export jobserver_auth. sync_mutex doesn't need to
be exported. Use the global definition for the option name.
* tests/scripts/variables/MAKEFLAGS: Add tests for $MAKEFLAGS.
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Move the source code (other than glob) into the "src" subdirectory.
Update all scripting and recommendations to support this change.
* *.c, *.h, w32/*: Move to src/
* configure.ac, Makefile.am, maintMakefile: Locate new source files.
* Basic.mk.template, mk/*: Update for new source file locations.
* NEWS, README.DOS.template: Update for new locations.
* build.template, build_w32.bat, builddos.bat: Ditto.
* po/POTFILES.in: Ditto
* tests/run_make_tests.pl, tests/scripts/features/load*: Ditto.
* make.1: Move to doc.
* mk/VMS.mk: Add support for building on VMS (hopefully).
* makefile.vms, prepare_w32.bat: Remove.
* SCOPTIONS: Update to define HAVE_CONFIG_H
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