X-Git-Url: https://iankelling.org/git/?a=blobdiff_plain;f=lnf;h=28f77ee7e8aa0d69cf650e1537d2c054ff3ff8d0;hb=refs%2Fheads%2Fmaster;hp=0620b32929d87c19ef5f79217094a9012f3df3ce;hpb=027b72114fc778535fae4a83c497dc47f71dedbd;p=lnf

diff --git a/lnf b/lnf
index 0620b32..28f77ee 100755
--- a/lnf
+++ b/lnf
@@ -1,41 +1,60 @@
 #!/bin/bash
-# Copyright (C) 2014-2016 Ian Kelling
-# This program is under GPL v. 3 or later, see <http://www.gnu.org/licenses/>
+# I, Ian Kelling, follow the GNU license recommendations at
+# https://www.gnu.org/licenses/license-recommendations.en.html. They
+# recommend that small programs, < 300 lines, be licensed under the
+# Apache License 2.0. This file contains or is part of one or more small
+# programs. If a small program grows beyond 300 lines, I plan to switch
+# its license to GPL.
+
+# Copyright 2024 Ian Kelling
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 
 _lnf_existing_link() {
-    local target dest_file dest_dir
-    target="$1"
-    dest_file="$2"
-    dest_dir="$3"
-    if [[ -L $dest_file ]]; then
-        if [[ $(readlink $dest_file) == "$target" ]]; then
-            # Leave the link in place, but make sure it's
-            # owner & group is as if we created it.
-            # links all get 777 perms, so
-            # we already know that is right.
-
-            # test for setgid.
-            if [[ $(stat -L -c%a "$dest_dir") == 2??? ]]; then
-                grp=$(stat -L -c%g "$dest_dir") || return $?
-            else
-                grp=$(id -g) || return $?
-            fi
-            if [[ $EUID == 0 && $(stat -c%u "$dest_file") != 0 ]]; then
-                chown -h 0:$grp "$dest_file" || return $?
-            elif [[ $(stat -c%g "$dest_file") != "$grp" ]]; then
-                chgrp -h $grp "$dest_file" || return $?
-            fi
-            do_exit=true
-            return 0
-        fi
-        to_remove+=("$dest_file")
-    elif [[ -e $dest_file ]]; then
-        to_remove+=("$dest_file")
+  local target dest_file dest_dir
+  target="$1"
+  dest_file="$2"
+  dest_dir="$3"
+  if [[ -L $dest_file ]]; then
+    if [[ $(readlink $dest_file) == "$target" ]]; then
+      # Leave the link in place, but make sure it's
+      # owner & group is as if we created it.
+      # links all get 777 perms, so
+      # we already know that is right.
+
+      # test for setgid.
+      if [[ $(stat -L -c%a "$dest_dir") == 2??? ]]; then
+        grp=$(stat -L -c%g "$dest_dir") || return $?
+      else
+        grp=$(id -g) || return $?
+      fi
+      if [[ $EUID == 0 && $(stat -c%u "$dest_file") != 0 ]]; then
+        chown -h 0:$grp "$dest_file" || return $?
+      elif [[ $(stat -c%g "$dest_file") != "$grp" ]]; then
+        chgrp -h $grp "$dest_file" || return $?
+      fi
+      do_exit=true
+      return 0
     fi
-    to_link+=("$target")
+    to_remove+=("$dest_file")
+  elif [[ -e $dest_file ]]; then
+    to_remove+=("$dest_file")
+  fi
+  to_link+=("$target")
 }
 lnf() {
-    local help="Usage:
+  local help="Usage:
        lnf [OPTIONS] -T TARGET LINK_NAME     (1st form)
        lnf [OPTIONS] TARGET                  (2nd form)
        lnf [OPTIONS] TARGET... DIRECTORY     (3rd form)
@@ -43,9 +62,8 @@ Create symlinks forcefully
 
 If the link already exists, make it's ownership be the same as if it was
 newly created (only chown if we are root).  Removes existing files using
-trash-put or rm -rf if it is not available, or if trash-put fails due to a
-limitation such as a cross-filesystem link. Create directory of link if
-needed. Slightly more restrictive arguments than ln.
+rm -rf. Create directory of link if needed. Slightly more restrictive
+arguments than ln.
 
 In the 1st form, create a link to TARGET with the name LINK_NAME.  In the 2nd
 form, create a link to TARGET in the current directory.  In the 3rd form, create
@@ -57,128 +75,107 @@ links to each TARGET in DIRECTORY.
 "
 
 
-    local temp nodir
-    local verbose=false
-    local dry_run=false
-    local do_exit=false
-    temp=$(getopt -l help,dry-run,verbose hnTv "$@") || usage 1
-    eval set -- "$temp"
-    while true; do
-        case $1 in
-            -n|--dry-run) dry_run=true; verbose=true; shift ;;
-            -T) nodir=-T; shift ;;
-            -v|--verbose) verbose=true; shift ;;
-            -h|--help) echo "$help"; return 0 ;;
-            --) shift; break ;;
-            *) echo "$0: Internal error! unexpected args: $*" ; exit 1 ;;
-        esac
-    done
-
-    if (( $# == 0 )); then
-        echo "$help"
-        return 1
-    fi
-
-    if [[ $nodir ]]; then
-        if (( $# != 2 )); then
-            echo "lnf: error: expected 2 arguments with -T flag. Got $#"
-            return 1
-        fi
+  local temp nodir
+  local verbose=false
+  local dry_run=false
+  local do_exit=false
+  temp=$(getopt -l help,dry-run,verbose hnTv "$@") || usage 1
+  eval set -- "$temp"
+  while true; do
+    case $1 in
+      -n|--dry-run) dry_run=true; verbose=true; shift ;;
+      -T) nodir=-T; shift ;;
+      -v|--verbose) verbose=true; shift ;;
+      -h|--help) echo "$help"; return 0 ;;
+      --) shift; break ;;
+      *) echo "$0: Internal error! unexpected args: $*" ; exit 1 ;;
+    esac
+  done
+
+  if (( $# == 0 )); then
+    echo "$help"
+    return 1
+  fi
+
+  if [[ $nodir ]]; then
+    if (( $# != 2 )); then
+      echo "lnf: error: expected 2 arguments with -T flag. Got $#"
+      return 1
     fi
+  fi
 
-    local reset_extglob=false
-    ! shopt extglob >/dev/null && reset_extglob=true
-    shopt -s extglob
-
-
-    local -a to_remove to_link
-    local x ret prefix dest_dir grp target
-    local mkdir=false
-
-    if [[ $nodir ]]; then
-        dest_file="$2"
-        dest_dir="$(dirname "$dest_file")"
-        _lnf_existing_link "$1" "$dest_file" "$dest_dir" || return $?
-        if $do_exit; then return 0; fi
-        if [[ ! -d $dest_dir ]]; then
-            mkdir=true
-            if [[ -e $dest_dir || -L $dest_dir ]]; then
-                to_remove+=("$dest_dir")
-            fi
-        fi
-        to_link+=("$dest_file")
-    elif (( $# >= 2 )); then
-        dest_dir="${!#}"
-        if [[ -d $dest_dir ]]; then
-            prefix="$dest_dir" # last arg
-            for target in "${@:1:$(( $# - 1 ))}"; do # all but last arg
-                # Remove 1 or more trailing slashes, using.
-                dest_file="${target%%+(/)}"
-                # remove any leading directory components, add prefix
-                dest_file="$prefix/${target##*/}"
-                _lnf_existing_link "$target" "$dest_file" "$dest_dir"
-            done
-        else
-            to_link+=("${@:1:$(( $# - 1 ))}")
-            mkdir=true
-        fi
-        if (( ${#to_link[@]} == 0 )); then
-            return 0
-        fi
-        to_link+=("$dest_dir")
-    elif  [[ $# -eq 1 ]]; then
-        dest_file="${1##*/}"
-        _lnf_existing_link "$1" "$dest_file" . || return $?
-        if $do_exit; then return 0; fi
-    fi
-    if (( ${#to_remove[@]} >= 1 )); then
-        if type -P trash-put >/dev/null; then
-            if $verbose; then
-                echo "lnf: trash-put -- ${to_remove[*]}"
-            fi
-            if ! $dry_run; then
-                trash-put -- "${to_remove[@]}" || ret=$?
-            fi
-            # trash-put will fail to trash a link that goes across filesystems (72),
-            # and for empty files (74)
-            # so revert to rm -rf in that case
-            if [[ $ret == 72 ]]; then
-                echo "lnf: using rm -rf to overcome cross filesystem trash-put limitation"
-                rm -rf -- "${to_remove[@]}" || return $?
-            elif [[ $ret == 74 ]]; then
-                echo "lnf: using rm -rf to overcome empty file & hardlink trash-put limitation"
-                rm -rf -- "${to_remove[@]}"
-            elif [[ $ret && $ret != 0 ]]; then
-                return $x
-            fi
-        else
-            if $verbose; then
-                echo "lnf: rm -rf -- ${to_remove[*]}"
-            fi
-            if ! $dry_run; then
-                rm -rf -- "${to_remove[@]}"
-            fi
-        fi
-    fi
+  local reset_extglob=false
+  ! shopt extglob >/dev/null && reset_extglob=true
+  shopt -s extglob
 
-    $reset_extglob && shopt -u extglob
 
-    if $mkdir; then
-        if $verbose; then
-            echo "lnf: mkdir -p $dest_dir"
-        fi
+  local -a to_remove to_link
+  local ret prefix dest_dir grp target
+  local mkdir=false
 
-        if ! $dry_run && ! mkdir -p "$dest_dir"; then
-            echo "lnf error: failed to make directory $dest_dir"
-            return 1
-        fi
+  if [[ $nodir ]]; then
+    dest_file="$2"
+    dest_dir="$(dirname "$dest_file")"
+    _lnf_existing_link "$1" "$dest_file" "$dest_dir" || return $?
+    if $do_exit; then return 0; fi
+    if [[ ! -d $dest_dir ]]; then
+      mkdir=true
+      if [[ -e $dest_dir || -L $dest_dir ]]; then
+        to_remove+=("$dest_dir")
+      fi
     fi
-
+    to_link+=("$dest_file")
+  elif (( $# >= 2 )); then
+    dest_dir="${!#}"
+    if [[ -d $dest_dir ]]; then
+      prefix="$dest_dir" # last arg
+      for target in "${@:1:$(( $# - 1 ))}"; do # all but last arg
+        # Remove 1 or more trailing slashes, using.
+        dest_file="${target%%+(/)}"
+        # remove any leading directory components, add prefix
+        dest_file="$prefix/${target##*/}"
+        _lnf_existing_link "$target" "$dest_file" "$dest_dir"
+      done
+    else
+      to_link+=("${@:1:$(( $# - 1 ))}")
+      mkdir=true
+    fi
+    if (( ${#to_link[@]} == 0 )); then
+      return 0
+    fi
+    to_link+=("$dest_dir")
+  elif  [[ $# -eq 1 ]]; then
+    dest_file="${1##*/}"
+    _lnf_existing_link "$1" "$dest_file" . || return $?
+    if $do_exit; then return 0; fi
+  fi
+  if (( ${#to_remove[@]} >= 1 )); then
     if $verbose; then
-        echo "lnf: ln -s $nodir -- ${to_link[*]}"
+      echo "lnf: rm -rf -- ${to_remove[*]}"
     fi
     if ! $dry_run; then
-        ln -s $nodir -- "${to_link[@]}"
+      rm -rf -- "${to_remove[@]}"
+    fi
+  fi
+
+  $reset_extglob && shopt -u extglob
+
+  if $mkdir; then
+    if $verbose; then
+      echo "lnf: mkdir -p $dest_dir"
+    fi
+
+    if ! $dry_run && ! mkdir -p "$dest_dir"; then
+      echo "lnf error: failed to make directory $dest_dir"
+      return 1
     fi
+  fi
+
+  if $verbose; then
+    echo "lnf: ln -s $nodir -- ${to_link[*]}"
+  fi
+  if ! $dry_run; then
+    ln -s $nodir -- "${to_link[@]}"
+  fi
 }
 lnf "$@"