[__file] stat explorer patch for systems without stat(1)

Some embedded systems (like OpenWrt) do not ship a stat(1) binary.
This workaround parses the output of ls(1) and /etc/passwd, /etc/group to
gather the information needed.
This commit is contained in:
Dennis Camera 2019-09-30 18:50:20 +02:00
parent 97bcfcc23c
commit e82dd35869

View file

@ -2,6 +2,7 @@
#
# 2013 Steven Armstrong (steven-cdist armstrong.cc)
# 2019 Nico Schottelius (nico-cdist at schottelius.org)
# 2020 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
#
# This file is part of cdist.
#
@ -21,29 +22,54 @@
destination="/$__object_id"
fallback() {
# Fallback: Patch the output together, manually.
ls_line=$(ls -ldn "$destination")
uid=$(echo "$ls_line" | awk '{ print $3 }')
gid=$(echo "$ls_line" | awk '{ print $4 }')
owner=$(awk -F: -v uid="$uid" '$3 == uid { print $1; f=1 } END { if (!f) print "UNKNOWN" }' /etc/passwd)
group=$(awk -F: -v uid="$uid" '$3 == uid { print $1; f=1 } END { if (!f) print "UNKNOWN" }' /etc/group)
mode_text=$(echo "$ls_line" | awk '{ print $1 }')
mode=$(echo "$mode_text" | awk '{ k=0; for (i=0; i<=8; i++) k += ((substr($1, i+2, 1) ~ /[rwx]/) * 2^(8-i)); printf("%0o", k) }')
size=$(echo "$ls_line" | awk '{ print $5 }')
links=$(echo "$ls_line" | awk '{ print $2 }')
printf 'type: %s\nowner: %d %s\ngroup: %d %s\nmode: %s %s\nsize: %d\nlinks: %d\n' \
"$("$__type_explorer/type")" \
"$uid" "$owner" \
"$gid" "$group" \
"$mode" "$mode_text" \
"$size" \
"$links"
}
# nothing to work with, nothing we could do
[ -e "$destination" ] || exit 0
os=$("$__explorer/os")
case "$os" in
"freebsd"|"netbsd"|"openbsd"|"macosx")
if ! command -v stat >/dev/null
then
fallback
exit
fi
case $("$__explorer/os")
in
freebsd|netbsd|openbsd|macosx)
stat -f "type: %HT
owner: %Du %Su
group: %Dg %Sg
mode: %Lp %Sp
size: %Dz
links: %Dl
" "$destination" | awk '/^type/ { print tolower($0); next; } { print; }'
;;
alpine)
# busybox stat
stat -c "type: %F
owner: %u %U
group: %g %G
mode: %a %A
size: %s
links: %h
" "$destination"
" "$destination" | awk '/^type/ { print tolower($0); next } { print }'
;;
solaris)
ls1="$( ls -ld "$destination" )"
@ -77,12 +103,14 @@ links: %h
echo "links: $( echo "$ls1" | awk '{print $2}' )"
;;
*)
stat --printf="type: %F
# NOTE: Do not use --printf here as it is not supported by BusyBox stat.
# NOTE: BusyBox's stat might not support the "-c" option, in which case
# we fall through to the shell fallback.
stat -c "type: %F
owner: %u %U
group: %g %G
mode: %a %A
size: %s
links: %h
" "$destination"
;;
links: %h" "$destination" 2>/dev/null || fallback
;;
esac