I’m trying to call cmake and redirect the output to a pipe.
To reproduce:
git clone https://github.com/avast/retdec
(It seems to be every CMake-Project, gradle projects don’t work, too)mkdir build&&cd build
- Add a file
test.hs
:
import System.Posix.IO
import System.Process
import System.Exit
import System.IO
main :: IO ()
main = do
(code, content) <- createProcessRedirected "cmake" ["..", "-DCMAKE_INSTALL_PREFIX=/opt/root/"]
case code of
ExitFailure _ -> do
putStrLn ("OOPS" ++ content)
return ()
_ -> do
putStrLn "After cmake"
(code2, content2) <- createProcessRedirected "make" ["install", "-j8"]
case code2 of
ExitFailure _ -> do
putStrLn ("OOPS" ++ content2)
return ()
_ -> do
putStrLn "SUCCESS"
return ()
-- Based on https://stackoverflow.com/a/14027387
createProcessRedirected :: String -> [String] -> IO (ExitCode, String)
createProcessRedirected command args = do
(p_r, p_w) <- System.Posix.IO.createPipe
h_r <- fdToHandle p_r
h_w <- fdToHandle p_w
(_, _, _, h_proc) <- createProcess (proc command args) {
std_out = UseHandle h_w,
std_err = UseHandle h_w,
create_group = False,
delegate_ctlc = True}
ret_code <- waitForProcess h_proc
content <- hGetContents h_r
return (ret_code, content)
Just compile this file (ghc test.hs -Wall -Wextra
)
If I try to execute ./test
now, it will build for some time (I can see how c++/make processes are spawned), but at one point it will simply stop.
I then have this process tree:
test
-> make install -j8
-> /usr/bin/cmake -P cmake_install.cmake
If I attach gdb and run bt
(First 6 lines):
#0 0x00007f4ac7f8c7f7 in __GI___libc_write (fd=1, buf=0x5607747dd2f0, nbytes=60) at ../sysdeps/unix/sysv/linux/write.c:26
#1 0x00007f4ac7f1068d in _IO_new_file_write (f=0x7f4ac80865a0 <_IO_2_1_stdout_>, data=0x5607747dd2f0, n=60) at fileops.c:1181
#2 0x00007f4ac7f0fa06 in new_do_write (fp=0x7f4ac80865a0 <_IO_2_1_stdout_>, data=0x5607747dd2f0 "-- Up-to-date: /opt/root/include/retdec/llvm/IR/OptBisect.h\ns.h\nexYAML.h\n.h\nnager.h\n\nayer.h\n.h\n\nt execute permission?\nif(NOT DEFINED CMAKE_INSTALL_SO_NO_EXE)\n set(CMAKE_INSTALL_SO_NO_EXE \"0\")\nendif()"..., to_do=to_do@entry=60) at /usr/src/debug/glibc-2.34-11.fc35.x86_64/libio/libioP.h:947
#3 0x00007f4ac7f11729 in _IO_new_do_write (to_do=60, data=<optimized out>, fp=<optimized out>) at fileops.c:423
#4 _IO_new_do_write (fp=<optimized out>, data=<optimized out>, to_do=60) at fileops.c:423
#5 0x00007f4ac7f0f828 in _IO_new_file_sync (fp=0x7f4ac80865a0 <_IO_2_1_stdout_>) at fileops.c:799
And then I try to continue running it and after 10 seconds I break again, I get exactly the same backtrace.
But If I comment out these both lines:
std_out = UseHandle h_w,
std_err = UseHandle h_w,
it works.
What am I doing wrong?