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modify call of stat to use NUL delimiter

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for more robust string parsing
This commit is contained in:
Patrick Schleizer 2024-07-24 10:56:08 -04:00
parent 7200e9bd8c
commit a077ae54ea
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GPG Key ID: CB8D50BB77BB3C48
1 changed files with 9 additions and 6 deletions
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15
usr/bin/permission-hardener
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@ -74,11 +74,14 @@ add_nosuid_statoverride_entry() {
local arr file_name existing_mode existing_owner existing_group
file_name="${line}"
stat_output="$(stat -c "%a %U %G" "${line}")"
read -r -a arr <<< "${stat_output}"
existing_mode="${arr[0]}"
existing_owner="${arr[1]}"
existing_group="${arr[2]}"
## Capture the stat output with fields separated by NUL characters.
## Delimiter at the end to avoid the last field to be interpreted as having a newline.
stat_output=$(stat -c '%n\0%a\0%U\0%G\0%' "${line}")
readarray -d '\0' -t arr <<< "${stat_output}"
file_name_from_stat="${arr[0]}"
existing_mode="${arr[1]}"
existing_owner="${arr[2]}"
existing_group="${arr[3]}"
if test "${#arr[@]}" = 0; then
log error "Line is empty: '${line}'" >&2
@ -363,7 +366,7 @@ set_file_perms() {
local stat_output
stat_output=""
if ! stat_output="$(stat -c "%a %U %G" "${fso_without_trailing_slash}")"; then
if ! stat_output="$(stat -c '%n\0%a\0%U\0%G\0%' "${fso_without_trailing_slash}")"; then
log error "Failed to run 'stat' on file: '${fso_without_trailing_slash}'!" >&2
continue
fi