Rscript fails to launch if the standard input (stdin) is closed, e.g. $ Rscript --vanilla -e 42 0<&- Fatal error: creating temporary file for '-e' failed
This appear to only happen with `-e EXPR`, e.g. it works when doing: $ echo "42" > script.R $ Rscript --vanilla script.R 0<&- [1] 42 and: $ R --vanilla 0<&- R version 4.2.1 (2022-06-23) -- "Funny-Looking Kid" Copyright (C) 2022 The R Foundation for Statistical Computing Platform: x86_64-pc-linux-gnu (64-bit) ... > TROUBLESHOOTING: $ strace Rscript --vanilla -e 42 0<&- execve("/home/hb/shared/software/CBI/R-4.2.1-gcc9/bin/Rscript", ["Rscript", "--vanilla", "-e", "42"], 0x7fff9f476418 /* 147 vars */) = 0 brk(NULL) = 0x5625ca9e6000 arch_prctl(0x3001 /* ARCH_??? */, 0x7fff23b4d260) = -1 EINVAL (Invalid argument) ... fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(0x88, 0), ...}) = 0 write(1, "Fatal error: creating temporary "..., 53Fatal error: creating temporary file for '-e' failed ) = 53 exit_group(2) = ? +++ exited with 2 +++ which points to src/unix/system.c: ifd = mkstemp(ifile); if (ifd > 0) ifp = fdopen(ifd, "w+"); if(!ifp) R_Suicide(_("creating temporary file for '-e' failed")); One rationale for having closed standard files (including stdin) is to avoid leaking file descriptors, cf. https://wiki.sei.cmu.edu/confluence/display/c/FIO22-C.+Close+files+before+spawning+processes and https://danwalsh.livejournal.com/53603.html. The background for reporting on this was that `system()` fails to work in processx spawned processes, which closes the standard files by default in processx (<= 3.7.0). Best, Henrik ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel