I found a bug in busybox-1.9.0. The nohup module doesn't behave like nohup from coreutils when it comes to output redirection. To test all possible cases I used the following little script: $ cat stdout-stderr #!/bin/bash echo stdout echo stderr 1>&2 With this, I compared the behaviour of nohup and busybox's nohup module with different output redirections: $ nohup ./stdout-stderr $ busybox nohup ./stdout-stderr $ nohup ./stdout-stderr 1>stdout.log $ busybox nohup ./stdout-stderr 1>stdout.log $ nohup ./stdout-stderr 2>stderr.log $ busybox nohup ./stdout-stderr 2>stderr.log $ nohup ./stdout-stderr 1>stdout.log 2>stderr.log $ busybox nohup ./stdout-stderr 1>stdout.log 2>stderr.log After each command I checked the contents of nohup.out, stdout.log and stderr.log. These are the results: +-----------------++-----------------+-----------------+-----------------+ | filedescriptors || nohup | busybox | patched busybox | +--------+--------++--------+--------+--------+--------+--------+--------+ | stdout | stderr || stdout | stderr | stdout | stderr | stdout | stderr | +--------+--------++--------+--------+--------+--------+--------+--------+ | tty | tty || file | file | file | file | file | file | | tty | - || file | stderr | file | - | file | stderr | | - | tty || stdout | stdout | - | - | stdout | stdout | | - | - || stdout | stderr | - | - | stdout | stderr | +--------+--------++--------+--------+--------+--------+--------+--------+ tested with: $ nohup --version nohup (GNU coreutils) 6.9 $ busybox BusyBox v1.9.0 (2008-01-31 16:29:55 CET) multi-call binary I also sent this bug report upstream, but until it's fixed it we should include a patch in the ebuild. Reproducible: Always Steps to Reproduce:
Created attachment 142295 [details, diff] busybox-1.9.0-nohup-redirection.patch Simple patch that fixes the problem.
Created attachment 142297 [details, diff] busybox-1.9.0-nohup-redirection.patch Fixes the output of the message "nohup: appending to nohup.out" as well, to make it behave exactly as coreutils nohup does.
upstream fixed it in current svn: http://article.gmane.org/gmane.linux.busybox/22449
Created attachment 142647 [details, diff] busybox-1.9.0-nohup-redirection.patch Patch as it was applied to busybox svn: http://www.busybox.net/cgi-bin/viewcvs.cgi/trunk/busybox/coreutils/nohup.c?rev=20940&r1=20219&r2=20940&makepatch=1&diff_format=u
added upstream fix to 1.9.0
