Here’s some discussion upstream about this, with a testcase and indication it’s not, in fact, a glibc bug.
--- Begin Message ---> According to the reporter, they get a working ksh93 if they disable > posix_spawn configure option so it may be a, very widespread, bug in GNU libc > (Linux/kFreeBSD/Hurd-only, I presume).I can confirm that disabling `posix_spawn` causes this bug to go away. OpenSUSE disables it in their build of ksh with a patch titled [ksh-qemu.patch](https://build.opensuse.org/package/view_file/shells/ksh/ksh-qemu.patch?expand=1), which implies there is another bug related to `posix_spawn` that affects QEMU. -- You are receiving this because you were mentioned. Reply to this email directly or view it on GitHub: https://github.com/ksh93/ksh/issues/79#issuecomment-660367476
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--- Begin Message ---Minimal reproducer for regression test: ```sh printf '%s\n' 1 2 3 | while read line; do ls /dev/null; done ``` Normal output: ``` /dev/null /dev/null /dev/null ``` Bug output: ``` /dev/null ls: ls: cannot execute [Exec format error] ls: ls: cannot execute [Exec format error] ``` -- You are receiving this because you were mentioned. Reply to this email directly or view it on GitHub: https://github.com/ksh93/ksh/issues/79#issuecomment-660373049
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--- Begin Message ---On macOS, the compiler flags used by the Apple version (which I've incorporated into `src/cmd/INIT/cc.darwin`) disable `SHOPT_SPAWN`. I can confirm that, if I change that flag to `-DSHOPT_SPAWN=1`, delete `arch` and recompile from scratch, I can reproduce this bug on the Mac. I can also reproduce this bug on FreeBSD, on which `SHOPT_SPAWN` is not disabled by default. Neither of these two systems use GNU libc, so it seems likely that this is a bug in ksh and not in any C library. Does anyone here have an idea how to fix it? Alternatively, I wonder if there would be any disadvantage to simply removing the use of `posix_spawn` altogether. -- You are receiving this because you were mentioned. Reply to this email directly or view it on GitHub: https://github.com/ksh93/ksh/issues/79#issuecomment-660371047
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