newlib

History

Corinna Vinschen 57640bee75 Cygwin: fix process parent/child relationship after execve Commit `5a0f2c00aa` "Cygwin: fork/exec: fix child process permissions" removed the PROCESS_DUP_HANDLE handle permission of the parent process handle in the child to avoid a security problem. It turned out that this broke the following scenario: If a process forks and then the parent execs, the child loses the ability to register the parent's death. To wit, after the parent died the child process does not set its own PPID to 1 anymore. The current exec mechanism copies required handle values (handles to keep contact to the child processes) into the child_info for the about-to-be-exec'ed process. The exec'ed process is supposed to duplicate these handles. This fails, given that we don't allow the exec'ed process PROCESS_DUP_HANDLE access to the exec'ing process since commit `5a0f2c00aa`. The fix is to avoid the DuplicateHandle calls in the exec'ed process. This patch sets the affected handles to "inheritable" in the exec'ing process at exec time. The exec'ed process just copies the handle values and resets handle inheritance to "non-inheritable". The exec'ing process doesn't have to reset handle inheritance, it exits after setting up the exec'ed process anyway. Testcase: $ ssh-agent /bin/sleep 3 ssh-agent forks and the parent exec's sleep. After sleep exits, `ps' should show ssh-agent to have PPID 1, and eventually ssh-agent exits. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>		2019-11-02 19:55:24 +01:00
..
CVSChangeLogs.old
cygserver	Cygwin: fix GCC 8.3 'local external declaration' errors	2019-07-17 11:08:20 -04:00
cygwin	Cygwin: fix process parent/child relationship after execve	2019-11-02 19:55:24 +01:00
doc	Cygwin: document recent changes to format_proc_cpuinfo	2019-10-07 16:06:28 -04:00
lsaauth
testsuite
utils	Cygwin: pty: Prevent the helper process from exiting by Ctrl-C.	2019-09-14 09:17:27 -04:00
acinclude.m4
aclocal.m4
autogen.sh
c++wrap
ccwrap
config.guess
config.sub
configure	Cygwin: seteuid: disable unused funcs and lsaauth subdir	2019-01-28 10:24:18 +01:00
configure.ac	Cygwin: seteuid: disable unused funcs and lsaauth subdir	2019-01-28 10:24:18 +01:00
configure.cygwin
CONTRIBUTORS	Cygwin: Add J.H. van de Water to CONTRIBUTORS	2018-08-15 18:02:22 +02:00
COPYING
COPYING.LIB
CYGWIN_LICENSE
install-sh
Makefile.common
Makefile.in
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