Not every compilers understand that rb_raise does not return. When a
function does not end with a return statement, such compilers can issue
warnings. We would better tell them about reachabilities.
Allow the 'Dir.home' method to reliably locate the user's home directory when
all three of the following are true at the same time:
1. Ruby is running on a Unix-like OS
2. The $HOME environment variable is not set
3. The process is not a descendant of login(1) (or a work-alike)
The prior behavior was that the lookup could only work for login-descended
processes.
This is accomplished by looking up the user's record in the password database
by uid (getpwuid_r(3)) as a fallback to the lookup by name (getpwname_r(3))
which is still attempted first (based on the name, if any, returned by
getlogin_r(3)).
If getlogin_r(3), getpwnam_r(3), and/or getpwuid_r(3) is not available at
compile time, will fallback on using their respective non-*_r() variants:
getlogin(3), getpwnam(3), and/or getpwuid(3).
The rationale for attempting to do the lookup by name prior to doing it by uid
is to accommodate the possibility of multiple login names (each with its own
record in the password database, so each with a potentially different home
directory) being mapped to the same uid (as is explicitly allowed for by
POSIX; see getlogin(3posix)).
Preserves the existing behavior for login-descended processes, and adds the
new capability of having Dir.home being able to find the user's home directory
for non-login-descended processes.
Fixes [Bug #16787]
Related discussion:
https://bugs.ruby-lang.org/issues/16787https://github.com/ruby/ruby/pull/3034
not only when !w but also when w == WAITPID_LOCK_ONLY.
See also: f7c0cc3692 and a226434206.
We thought this change was an oversight in the latter commit.
Without this change, the test fails like:
$ make test-all TESTS="../test/ruby/test_process.rb -n test_exec_failure_leaves_no_child" RUN_OPTS="--jit"
...
1) Failure:
TestProcess#test_exec_failure_leaves_no_child [/home/k0kubun/src/github.com/ruby/ruby/test/ruby/test_process.rb:2493]:
Expected [[26799, #<Process::Status: pid 26799 exit 127>]] to be empty.
Co-Authored-By: Yusuke Endoh <mame@ruby-lang.org>
As fork(2) is deprecated, its calls must be guarded by
`COMPILER_WARNING_IGNORED(-Wdeprecated-declarations)`.
All usages of fork(2) in process have been alread guarded. A new call
to fork(2) was added in ruby.c with f22c4ff359.
This caused a build failure on Solaris 11.
It may hide a bug to guard big code unnecessarily, so this change
introduces a simple wrapper "rb_fork" whose definition is guarded, and
replaces all calls to fork(2) with the wrapper function.
Saves comitters' daily life by avoid #include-ing everything from
internal.h to make each file do so instead. This would significantly
speed up incremental builds.
We take the following inclusion order in this changeset:
1. "ruby/config.h", where _GNU_SOURCE is defined (must be the very
first thing among everything).
2. RUBY_EXTCONF_H if any.
3. Standard C headers, sorted alphabetically.
4. Other system headers, maybe guarded by #ifdef
5. Everything else, sorted alphabetically.
Exceptions are those win32-related headers, which tend not be self-
containing (headers have inclusion order dependencies).
This removes the security features added by $SAFE = 1, and warns for access
or modification of $SAFE from Ruby-level, as well as warning when calling
all public C functions related to $SAFE.
This modifies some internal functions that took a safe level argument
to no longer take the argument.
rb_require_safe now warns, rb_require_string has been added as a
version that takes a VALUE and does not warn.
One public C function that still takes a safe level argument and that
this doesn't warn for is rb_eval_cmd. We may want to consider
adding an alternative method that does not take a safe level argument,
and warn for rb_eval_cmd.
This function has been used wrongly always at first, "allocate a
buffer then wrap it with tmpbuf". This order can cause a memory
leak, as tmpbuf creation also can raise a NoMemoryError exception.
The right order is "create a tmpbuf then allocate&wrap a buffer".
So the argument of this function is rather harmful than just
useless.
TODO:
* Rename this function to more proper name, as it is not used
"temporary" (function local) purpose.
* Allocate and wrap at once safely, like `ALLOCV`.
We can check the function pointer passed to rb_define_global_function
like we do so in rb_define_method. It turns out that almost anybody
is misunderstanding the API.
We can check the function pointer passed to rb_define_module_function
like how we do so in rb_define_method. The difference is that this
changeset reveales lots of atiry mismatches.
After 5e86b005c0, I now think ANYARGS is
dangerous and should be extinct. This commit uses rb_gvar_getter_t /
rb_gvar_setter_t for rb_define_hooked_variable /
rb_define_virtual_variable which revealed lots of function prototype
inconsistencies. Some of them were literally decades old, going back
to dda5dc00cf.
Often uid / gid are 16 bit or 32 bit integers, while VALUE are 32
to 64 bits. They tend to differ in size. Because rb_ensure expects
its callbacks to take VALUE arguments, narrowing must be done by
hand, otherwise data corruption can happen depending on machine ABI.
* process.c (rb_clock_getres): fix code markups, as `+` can not
include parentheses.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67369 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
卜部昌平
Nobuyoshi Nakada
nicholas a. evans
Alan D. Salewski
Samuel Williams
Takashi Kokubun
Yusuke Endoh
Benoit Daloze
Marcus Stollsteimer
Jeremy Evans
zverok
Alan Wu
yuuji.yaginuma
nobu
akr