RVP <[email protected]> writes: > On Tue, 25 Nov 2025, Greg Troxel wrote: > >> And I find after 15 minutes of hanging: >> >> UID PID PPID CPU PRI NI VSZ RSS WCHAN STAT TTY >> TIME COMMAND >> 12345 1803 1 28859 29 0 17652 1072 parked I+ pts/37 >> 0:00.00 script -qec true /dev/null >> >> Attaching, I see: >> >> [Switching to LWP 1803 of process 1803] >> 0x00007f7f9aa0abba in ___lwp_park60 () from /usr/libexec/ld.elf_so >> (gdb) bt >> #0 0x00007f7f9aa0abba in ___lwp_park60 () from /usr/libexec/ld.elf_so >> #1 0x00007f7f9aa05d45 in _rtld_exclusive_enter () from >> /usr/libexec/ld.elf_so >> #2 0x00007f7f9aa0680d in _rtld_exit () from /usr/libexec/ld.elf_so >> #3 0x000079176e95a6c9 in __cxa_finalize () from /usr/lib/libc.so.12 >> #4 0x000079176e95a3ed in exit () from /usr/lib/libc.so.12 >> #5 0x00000001cdc0179b in done () >> #6 0x00000001cdc0189a in finish () >> #7 <signal handler called> >> #8 0x00007f7f9aa07ff3 in _rtld_symlook_obj () from /usr/libexec/ld.elf_so >> #9 0x00007f7f9aa083ea in _rtld_symlook_list () from >> /usr/libexec/ld.elf_so >> #10 0x00007f7f9aa0889f in _rtld_symlook_default () from >> /usr/libexec/ld.elf_so >> #11 0x00007f7f9aa08d4a in _rtld_find_plt_symdef () from >> /usr/libexec/ld.elf_so >> #12 0x00007f7f9aa00bc0 in _rtld_bind () from /usr/libexec/ld.elf_so >> #13 0x00007f7f9aa0082d in _rtld_bind_start () from /usr/libexec/ld.elf_so >> #14 0x0000000000000246 in ?? () >> #15 0x0000000000002d4f in ?? () >> #16 0x000079176e913b80 in _malloc_prefork () from /usr/lib/libc.so.12 >> #17 0x00000001cdc0213b in main () >> >> which looks like an async-signal-safe botch leading to deadlock. >> >> But, running script outside of bup works fine. (Bup does set >> LD_LIBRARY_PATH to pick up bup-under-test libs.) >> >> Any insight? >> > > Looks like PR# 56254 again. script(1) should really be rewritten, but, for > now can you change `exit(status)' to `_exit(status)' here: > > https://github.com/NetBSD/src/blob/trunk/usr.bin/script/script.c#L361
Thanks! Also, running this from the shell script -qec 'echo -n' /dev/null seems to hang reasonably often.
