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kiss: Big cleanup of as_root() usage.
1. The same as_root() function is used for all elevation now. The environment can be fully controlled when calling the function. 2. Removal of mixed tabs/spaces due to heredoc fuckery thanks to 'set -- $(cmd)'. 3. Moved file owner code to a function and added safety measure against non-existent UIDs. 4. Fixed bugs when generating checksums via as_root(). Permissions are now checked on a file basis instead of a directory one.
This commit is contained in:
Dylan Araps
parent
724d393bb1
commit
f5c2777787
@ -1,7 +0,0 @@
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root = true
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# Force GitHub to display tabs
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# mixed with [4] spaces properly.
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[kiss]
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indent_style = tab
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indent_size = 4
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112
kiss
112
kiss
@ -51,19 +51,32 @@ as_root() {
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# 'doas' or 'su'. Hurrah for choice.
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[ "$uid" = 0 ] || log "Using '${su:-su}' (to become ${user:=root})"
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# Add the following environment variables to the root environment
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# so that the non-root user's cache can be used. This is the
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# portable method of doing so and works across all tools.
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set -- env HOME="$HOME" XDG_CACHE_HOME="$XDG_CACHE_HOME" \
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KISS_PATH="$KISS_PATH" KISS_FORCE="$KISS_FORCE" "$@"
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case $su in
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*sudo) sudo -iu "$user" -- "$@" ;;
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*doas) doas -u "$user" -- "$@" ;;
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*) su -lc "$* <&3" "$user" 3<&0 </dev/tty ;;
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case ${su##*/} in
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sudo) sudo -u "$user" -- env "$@" ;;
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doas) doas -u "$user" -- env "$@" ;;
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su) su -c "env $* <&3" "$user" 3<&0 </dev/tty ;;
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*) die "Invalid KISS_SU value: $su (valid: doas, sudo, su)"
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esac
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}
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file_owner() {
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# Grab the owner of the file/directory via 'ls -ld'. This is
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# fine despite the usual gabble about 'ls' and its usage in scripts.
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#
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# Grabbing permissions, ownership or symlink targets from 'ls -l'
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# output is totally fine and doesn't suffer from the disconnect
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# between the real and display representation of the information.
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#
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# Globbing is disabled and word splitting is intentional here.
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# shellcheck disable=2046
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set -- $(ls -ld "$1"); user=${3:-root}
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# If the owner's user ID doesn't exist, fallback
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# to using 'root'. This prevents the code from
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# changing the permissions to something wonky.
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id -u "$user" >/dev/null 2>&1 || user=root
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}
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run_hook() {
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# Provide a default post-build hook to remove files
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# and directories for things we don't support out of
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@ -1339,33 +1352,26 @@ pkg_updates() {
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# ownership of files and directories in the rare
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# case that the repository is owned by a 3rd user.
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(
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# Grab the owner of the directory via 'ls -ld'.
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# This is fine despite the usual gabble about
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# 'ls' and its usage in scripts.
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#
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# Grabbing permissions, ownership or symlink
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# targets from 'ls -l' output is totally fine
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# and doesn't suffer from the disconnect
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# between the real and display representation
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# of the information..
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read -r _ _ user _ <<-EOF || user=root
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$(ls -ld "$PWD")
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EOF
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# If the owner's user ID doesn't exist, fallback
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# to using 'root'. This prevents the code from
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# changing the permissions to something wonky.
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id -u "$user" >/dev/null 2>&1 ||
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user=root
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file_owner "$PWD"
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# We're in a repository which is owned by a 3rd
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# user. Not root or the current user.
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[ "$user" = root ] ||
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log "Dropping permissions to $user for pull"
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case $su in
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su) "$su" -c "git fetch && git merge" "$user" ;;
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*) "$su" -u "$user" git fetch
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"$su" -u "$user" git merge
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esac
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# 'sudo' and 'doas' properly parse command-line
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# arguments and split them in the common way. 'su'
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# on the other hand requires that each argument be
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# properly quoted as the command passed to it must
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# be a string... This sets quotes where needed.
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git_cmd="git fetch && git merge"
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case $su in *su) git_cmd="'$git_cmd'"; esac
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# Spawn a subshell to run multiple commands as
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# root at once. This makes things easier on users
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# who aren't using persist/timestamps for auth
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# caching.
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user=$user as_root sh -c "$git_cmd"
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)
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fi
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}
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@ -1471,29 +1477,19 @@ args() {
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set -- "${PWD##*/}"
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esac
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# Parse some arguments earlier to remove the need to duplicate code.
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case $action in
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s|search)
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[ "$1" ] || die "'kiss $action' requires an argument"
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;;
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a|alternatives)
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# Rerun the script with 'su' if the user isn't root.
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# Cheeky but 'su' can't be used on shell functions themselves.
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# Rerun the script as root with a fixed environment if needed. We sadly
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# can't run singular functions as root so this is needed.
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case $action in a|alternatives|i|install|r|remove)
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[ -z "$1" ] || [ -w "$KISS_ROOT/" ] || [ "$uid" = 0 ] || {
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as_root kiss "$action" "$@"
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return
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}
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;;
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as_root HOME="$HOME" \
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XDG_CACHE_HOME="$XDG_CACHE_HOME" \
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KISS_PATH="$KISS_PATH" \
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KISS_FORCE="$KISS_FORCE" \
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KISS_ROOT="$KISS_ROOT" \
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kiss "$action" "$@"
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i|install|r|remove)
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# Rerun the script with 'su' if the user isn't root.
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# Cheeky but 'su' can't be used on shell functions themselves.
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[ -w "$KISS_ROOT/" ] || [ "$uid" = 0 ] || {
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KISS_FORCE="$KISS_FORCE" as_root kiss "$action" "$@"
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return
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}
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;;
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esac
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# Actions can be abbreviated to their first letter. This saves
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@ -1529,19 +1525,19 @@ args() {
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continue
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}
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pkg_checksums "$pkg" | {
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if [ -w "$repo_dir" ]; then
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pkg_checksums "$pkg" |
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if touch "$repo_dir/checksums" 2>/dev/null; then
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tee "$repo_dir/checksums"
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else
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log "$pkg" "Need permissions to generate checksums"
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read -r _ _ user _ <<-EOF || user=root
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$(ls -ld "$PWD")
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EOF
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file_owner "$repo_dir"
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pkg_checksums "$pkg" |
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user=$user as_root tee "$repo_dir/checksums"
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fi
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}
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log "$pkg" "Generated checksums"
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done
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