Configuration Information [Automatically generated, do not change]:
Machine: i686
OS: linux-gnu
Compiler: i686-pc-linux-gnu-gcc
Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='i686'
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i686-pc-linux-gnu'
-DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL
-DHAVE_CONFIG_H -I. -I. -I./include -I./lib -O2 -march=i686
-fomit-frame-pointer
uname output: Linux alphaville.zko.hp.com 2.6.12-gentoo-r6 #4 Thu Sep 1
11:04:19 EDT 2005 i686 Intel(R) Pentium(R) M processor 1600MHz GenuineIntel
GNU/Linux
Machine Type: i686-pc-linux-gnu
Bash Version: 3.0
Patch Level: 16
Release Status: release
Description:
Consider a script that invokes ssh to execute a remote command
(I've set up public key authentication, so no passwords are needed):
ssh remote date
date
ssh remote date
date
exit 0
If I invoke bash and give it the script filename as argument,
it works fine. But if I pipe the script file into bash or
redirect bash's stdin so that it comes from the script file,
bash quits immediately after the (first) ssh command is finished.
stracing the bash invocation shows that bash gets an EOF on
the read after the ssh command is done. Although ssh is
essential to this behavior, I cannot see how ssh could fiddle
with bash's stdin, so I decided to submit is as a bash bug -
but I may be wrong.
My current workaround is to redirect ssh's stdin from /dev/null:
ssh remote date </dev/null
date
ssh remote date </dev/null
date
exit 0
Repeat-By:
Create a file, say junk.sh, with the commands above.
I believe that the following three invocations should
give me identical output (that of the third invocation).
This is what I get:
$ cat junk.sh | bash
Mon Sep 19 19:07:40 EDT 2005
$ bash < junk.sh
Mon Sep 19 19:07:48 EDT 2005
$ bash junk.sh
Mon Sep 19 19:07:52 EDT 2005
Mon Sep 19 19:07:52 EDT 2005
Mon Sep 19 19:07:53 EDT 2005
Mon Sep 19 19:07:53 EDT 2005
$
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