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The Android support in erl_child_setup.c is broken:
1. The close fd loop compares an fd (integer i) with the address of the function
__system_properties_fd rather than the value of calling that function.
2. This function is locally defined, but its name starts with two underscores
which is reserved for the implementation.
3. This function is not used outside of this file, so should be static.
4. This function performs a fair amount of work (calls getenv and atoi), which
would be repeated for each and every fd in the [from,to] range.
5. This function contains an unsed local variable 's'.
Fixed by dropping the __ prefix, making the function static, dropping the unused
local variable, and rewriting the close fd loop to call the function at most once.
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The commit c2b4eab25c907f453a394d382c04cd04e6c06b49 introduced an error
in which child_setup erroneously tried to close all file descriptors twice.
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* nox/reedr-closefrom:
Use closefrom(2) when available in child_setup
Conflicts:
erts/emulator/sys/unix/erl_child_setup.c
OTP-11809
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Enable a cross compile Erlang/OTP platform to Android or Raspberry PI
using Android NDK. Port emulator and core application to support target
HW platform. Exclude any add-on services required for OTP platform deployment
into target hardware due to device fragmentation and jail-break requirements.
* fix erts/emulator/beam/sys.h
Disable redefinition of __noreturn macro
* port erts/emulator/sys/unix/erl_child_setup.c
Use techniques proposed by https://code.google.com/p/erlang4android to
access system properties
* fix erts/emulator/sys/unix/erl_unix_sys_ddll.c
The static linking of emulator cannot find dlerror(), dlopen() symbols
* port erts/emulator/sys/unix/sys.c
make path to shell configurable at build time
* port erts/etc/common/Makefile.in
disable librt for *-linux-androideabi
* port erts/lib_src/pthread/ethread.c
Use techniques proposed by https://code.google.com/p/erlang4android to
disable emulator crash if kernel threads are on. Replace unreliable
pthread_sigmask() by sigprocmask()
* port lib/erl_interface/src/connect/ei_connect.c
Disable call to undefined gethostid()
* port lib/erl_interface/src/connect/ei_resolve.c
Use gethostbyname_r() on Android platform
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