Re: [gentoo-user] man bash document doesn't match real life bash.
On Sunday 23 September 2007, Mrugesh Karnik wrote: From man bash: ``When bash is invoked as an interactive login shell, or as a non-interactive shell with the --login option, it first reads and executes commands from the file /etc/profile, if that file exists. After reading that file, it looks for ~/.bash_profile, ~/.bash_login, and ~/.profile, in that order, and reads and executes commands from the first one that exists and is readable. The --noprofile option may be used when the shell is started to inhibit this behavior. snip When an interactive shell that is not a login shell is started, bash reads and executes commands from ~/.bashrc, if that file exists. This may be inhibited by using the --norc option. The --rcfile file option will force bash to read and execute commands from file instead of ~/.bashrc.'' And this last is the part that fails to mention that a non-login shell will read /etc/bash/bashrc before ~/.bashrc, as the comments inside /etc/bash/bashrc and David Harel say. Ok, after closer inspection, it seems that the /etc/bash/ way is a gentooism. Bash would normally define SYS_BASHRC and SYS_BASH_LOGOUT as /etc/bash.bashrc and /etc/bash.bash_logout respectively, even though it does not use them by default (they are commented in the sources). Nearly all linux distros uncomment those definitions, thus making bash use those files (see eg ubuntu). A gentoo patch, namely bash-3.0-configs.patch, changes those into /etc/bash/bashrc and /etc/bash/bash_logout. See bug #26952 (esp. from comment #52) and bug #90488 for further details. Note that gentoo applies the patch regardless of the vanilla USE flag. So, it seems that, after all, the standard man page is correct, but, in gentoo, it probably should be patched to reflect the way things work in gentoo. Not sure whether this is enough to be worth a bug report? -- [EMAIL PROTECTED] mailing list
Re: [gentoo-user] man bash document doesn't match real life bash.
As Etaoin Shrdlu said, bash does not even start /etc/profile. Below grep
on strace output on bash:
$ grep profile /tmp/bash.trace
$
$ # My comment, it got nothing
$ grep bashrc /tmp/bash.trace
open(/etc/bash/bashrc, O_RDONLY|O_LARGEFILE) = 3
read(3, # /etc/bash/bashrc\n#\n# This file..., 2540) = 2540
open(/home/harel/.bashrc, O_RDONLY|O_LARGEFILE) = 3
Neil Bothwick wrote:
On Wed, 19 Sep 2007 17:03:16 +0200, David Harel wrote:
I was surprised to find that in man bash the reference to initialization
files is wrong. The bash manual says it reads initialization files from
/etc/profile:
FILES
/bin/bash
The bash executable
/etc/profile
The systemwide initialization file, executed for login
shells
Where real life uses /etc/bash/bashrc
This part is taken from strace dump: strace bash -i
open(/etc/bash/bashrc, O_RDONLY|O_LARGEFILE) = 3
It reads both, this is from /etc/profile
if [ -n ${BASH_VERSION} ] ; then
# Newer bash ebuilds include /etc/bash/bashrc which will setup PS1
# including color. We leave out color here because not all
# terminals support it.
if [ -f /etc/bash/bashrc ] ; then
# Bash login shells run only /etc/profile
# Bash non-login shells run only /etc/bash/bashrc
# Since we want to run /etc/bash/bashrc regardless, we source it
# from here. It is unfortunate that there is no way to do
# this *after* the user's .bash_profile runs (without putting
# it in the user's dot-files), but it shouldn't make any
# difference.
. /etc/bash/bashrc
--
Regards.
David Harel,
==
Home office +972 77 7657645
Fax:+972 77 7657645
Cellular: +972 54 4534502
Snail Mail: Amuka
D.N Merom Hagalil
13802
Israel
Email: [EMAIL PROTECTED]
--
[EMAIL PROTECTED] mailing list
Re: [gentoo-user] man bash document doesn't match real life bash.
Neil Bothwick wrote: On Wed, 19 Sep 2007 17:03:16 +0200, David Harel wrote: I was surprised to find that in man bash the reference to initialization files is wrong. The bash manual says it reads initialization files from /etc/profile: FILES /bin/bash The bash executable /etc/profile The systemwide initialization file, executed for login shells Where real life uses /etc/bash/bashrc This part is taken from strace dump: strace bash -i open(/etc/bash/bashrc, O_RDONLY|O_LARGEFILE) = 3 Hmmm. bash -i is not a login shell. An interactive shell doesn't read /etc/profile if it's not a login shell. From man bash: ``When bash is invoked as an interactive login shell, or as a non-interactive shell with the --login option, it first reads and executes commands from the file /etc/profile, if that file exists. After reading that file, it looks for ~/.bash_profile, ~/.bash_login, and ~/.profile, in that order, and reads and executes commands from the first one that exists and is readable. The --noprofile option may be used when the shell is started to inhibit this behavior. snip When an interactive shell that is not a login shell is started, bash reads and executes commands from ~/.bashrc, if that file exists. This may be inhibited by using the --norc option. The --rcfile file option will force bash to read and execute commands from file instead of ~/.bashrc.'' -- Mrugesh Karnik GPG Key 0xBA6F1DA8 Public key on http://wwwkeys.pgp.net signature.asc Description: This is a digitally signed message part.
Re: [gentoo-user] man bash document doesn't match real life bash.
On Wed, 19 Sep 2007 17:03:16 +0200, David Harel wrote:
I was surprised to find that in man bash the reference to initialization
files is wrong. The bash manual says it reads initialization files from
/etc/profile:
FILES
/bin/bash
The bash executable
/etc/profile
The systemwide initialization file, executed for login
shells
Where real life uses /etc/bash/bashrc
This part is taken from strace dump: strace bash -i
open(/etc/bash/bashrc, O_RDONLY|O_LARGEFILE) = 3
It reads both, this is from /etc/profile
if [ -n ${BASH_VERSION} ] ; then
# Newer bash ebuilds include /etc/bash/bashrc which will setup PS1
# including color. We leave out color here because not all
# terminals support it.
if [ -f /etc/bash/bashrc ] ; then
# Bash login shells run only /etc/profile
# Bash non-login shells run only /etc/bash/bashrc
# Since we want to run /etc/bash/bashrc regardless, we source it
# from here. It is unfortunate that there is no way to do
# this *after* the user's .bash_profile runs (without putting
# it in the user's dot-files), but it shouldn't make any
# difference.
. /etc/bash/bashrc
--
Neil Bothwick
Come on! It's a whole new life out there!
Oh, no. Not another one!
signature.asc
Description: PGP signature
Re: [gentoo-user] man bash document doesn't match real life bash.
On Wednesday 19 September 2007, Neil Bothwick wrote:
On Wed, 19 Sep 2007 17:03:16 +0200, David Harel wrote:
Where real life uses /etc/bash/bashrc
This part is taken from strace dump: strace bash -i
open(/etc/bash/bashrc, O_RDONLY|O_LARGEFILE) = 3
It reads both, this is from /etc/profile
if [ -n ${BASH_VERSION} ] ; then
# Newer bash ebuilds include /etc/bash/bashrc which will setup PS1
# including color. We leave out color here because not all
# terminals support it.
if [ -f /etc/bash/bashrc ] ; then
# Bash login shells run only /etc/profile
# Bash non-login shells run only /etc/bash/bashrc
# Since we want to run /etc/bash/bashrc regardless, we source
it # from here. It is unfortunate that there is no way to do # this
*after* the user's .bash_profile runs (without putting # it in the
user's dot-files), but it shouldn't make any # difference.
. /etc/bash/bashrc
It reads both, but the Bash non-login shells run only /etc/bash/bashrc
behavior is not documented in man bash.
--
[EMAIL PROTECTED] mailing list
Re: [gentoo-user] man bash document doesn't match real life bash.
On Wed, 2007-09-19 at 17:03 +0200, David Harel wrote: I was surprised to find that in man bash the reference to initialization files is wrong. The bash manual says it reads initialization files from /etc/profile: FILES /bin/bash The bash executable /etc/profile The systemwide initialization file, executed for login shells Most bash installations have /etc/profile source /etc/bashrc. This is not uncommon. You'll probably likely see the default ~/.bash_profile source ~/.bashrc. But it is sourcing /etc/profile else you wouldn't be getting half the environment variables that you're getting. -a -- [EMAIL PROTECTED] mailing list
