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(battery-status-function) Fix errors in Termux

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* lisp/battery.el (battery-status-function): In Termux, neither
/sys/ or /proc/ are readable on phones that are not rooted. This
patch makes Emacs verify if they are readable before it attemps
reading them (bug#53026).

Copyright-paperwork-exempt: yes
This commit is contained in:
Lucien Cartier-Tilet 2022-01-14 09:17:25 +01:00 committed by Lars Ingebrigtsen
parent 39114e1e2b
commit 3c0e51e4e5
1 changed files with 2 additions and 0 deletions
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2
lisp/battery.el
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@ -96,12 +96,14 @@ Value does not include \".\" or \"..\"."
(cond ((member battery-upower-service (dbus-list-activatable-names))
#'battery-upower)
((and (eq system-type 'gnu/linux)
(file-readable-p "/sys/")
(battery--find-linux-sysfs-batteries))
#'battery-linux-sysfs)
((and (eq system-type 'gnu/linux)
(file-directory-p "/proc/acpi/battery"))
#'battery-linux-proc-acpi)
((and (eq system-type 'gnu/linux)
(file-readable-p "/proc/")
(file-readable-p "/proc/apm"))
#'battery-linux-proc-apm)
((and (eq system-type 'berkeley-unix)