[issue1333] grml zshrc used on Linux 3.2 (e.g. Wheezy) shows before each prompt "batterylinux:6: no such file or directory: /sys/class/power_supply/BAT0/capacity"

[Axel Beckert]

Axel Beckert <abe at deuxchevaux.org> added the comment:

Hi,

On Sun, Dec 07, 2014 at 12:52:16AM +0000, Axel Beckert wrote:
> batterylinux:6: no such file or directory: /sys/class/power_supply/BAT0/capacity

The following patch seems to fix this issue:

diff --git a/etc/zsh/zshrc b/etc/zsh/zshrc
index d3d73b1..ae2f8af 100644
--- a/etc/zsh/zshrc
+++ b/etc/zsh/zshrc
@@ -1674,7 +1674,13 @@ local batteries bat capacity
 batteries=( /sys/class/power_supply/BAT*(N) )
 if (( $#batteries > 0 )) ; then
     for bat in $batteries ; do
-        capacity=$(< $bat/capacity)
+        if [[ -e $bat/capacity ]]; then
+            capacity=$(< $bat/capacity)
+        else
+            typeset -F energy_full=$(< $bat/energy_full)
+            typeset -F energy_now=$(< $bat/energy_now)
+            typeset -i capacity=$(( 100 * $energy_now / $energy_full))
+        fi
         case $(< $bat/status) in
         Charging)
             GRML_BATTERY_LEVEL+=" ^"

There are though some syntax issues if running on Wheezy, too, but
likely due to zsh 4.3.17 and not due to kernel 3.2.x. The following
patch fixes them -- I can open a separate issue for that if wanted:

diff --git a/etc/zsh/zshrc b/etc/zsh/zshrc
index d3d73b1..ae2f8af 100644
--- a/etc/zsh/zshrc
+++ b/etc/zsh/zshrc
@@ -1129,7 +1129,7 @@ help_zle_parse_keybindings()
 
     if [[ -r $HELP_ZLE_CACHE_FILE ]]; then
         local load_cache=0
-        for f ($HELPZLE_KEYBINDING_FILES) [[ $f -nt $HELP_ZLE_CACHE_FILE ]] && load_cache=1
+        for f ($HELPZLE_KEYBINDING_FILES); do [[ $f -nt $HELP_ZLE_CACHE_FILE ]] && load_cache=1; done
         [[ $load_cache -eq 0 ]] && . $HELP_ZLE_CACHE_FILE && return
     fi
 
@@ -2934,7 +2940,7 @@ ssl-cert-info() {
 }
 
 # make sure our environment is clean regarding colors
-for color in BLUE RED GREEN CYAN YELLOW MAGENTA WHITE ; unset $color
+for color in BLUE RED GREEN CYAN YELLOW MAGENTA WHITE ; do unset $color; done
 
 # "persistent history"
 # just write important commands you always need to ~/.important_commands
@@ -3406,7 +3412,7 @@ if check_com -c hg ; then
     #f5# GNU like diff for mercurial
     hgdi() {
         emulate -L zsh
-        for i in $(hg status -marn "$@") ; diff -ubwd <(hg cat "$i") "$i"
+        for i in $(hg status -marn "$@") ; do diff -ubwd <(hg cat "$i") "$i"; done
     }
 
     # build debian package

		Kind regards, Axel
-- 
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----------
messages: 4913, 4914
nosy: abe
priority: wish
status: chatting
title: grml zshrc used on Linux 3.2 (e.g. Wheezy) shows before each prompt "batterylinux:6: no such file or directory: /sys/class/power_supply/BAT0/capacity"
topic: configs, grml-etc-core, zsh

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GRML issue tracker <bts at bts.grml.org>
<http://bts.grml.org/grml/issue1333>
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