perms.plugin.zsh

 1# Some useful commands for setting permissions.
 2#
 3# Rory Hardy [GneatGeek]
 4# Andrew Janke [apjanke]
 5
 6### Aliases
 7
 8# Set all files' permissions to 644 recursively in a directory
 9function set644 {
10	find "${@:-.}" -type f ! -perm 644 -print0 | xargs -0 chmod 644
11}
12
13# Set all directories' permissions to 755 recursively in a directory
14function set755 {
15	find "${@:-.}" -type d ! -perm 755 -print0 | xargs -0 chmod 755
16}
17
18### Functions
19
20# resetperms - fix permissions on files and directories, with confirmation
21# Returns 0 on success, nonzero if any errors occurred
22function resetperms {
23  local opts confirm target exit_status chmod_opts use_slow_mode
24  zparseopts -E -D -a opts -help -slow v+=chmod_opts
25  if [[ $# > 1 || -n "${opts[(r)--help]}" ]]; then
26    cat <<EOF
27Usage: resetperms [-v] [--help] [--slow] [target]
28
29  target  is the file or directory to change permissions on. If omitted,
30          the current directory is taken to be the target.
31
32  -v      enables verbose output (may be supplied multiple times)
33
34  --slow  will use a slower but more robust mode, which is effective if
35          directories themselves have permissions that forbid you from
36          traversing them.
37
38EOF
39    exit_status=$(( $# > 1 ))
40    return $exit_status
41  fi
42
43  if [[ $# -eq 0 ]]; then
44    target="."
45  else
46    target="$1"
47  fi
48  if [[ -n ${opts[(r)--slow]} ]]; then use_slow=true; else use_slow=false; fi
49
50  # Because this requires confirmation, bail in noninteractive shells
51  if [[ ! -o interactive ]]; then
52    echo "resetperms: cannot run in noninteractive shell"
53    return 1
54  fi
55
56  echo "Fixing perms on $target?"
57  printf '%s' "Proceed? (y|n) "
58  read confirm
59  if [[ "$confirm" != y ]]; then
60    # User aborted
61    return 1
62  fi
63
64  # This xargs form is faster than -exec chmod <N> {} \; but will encounter
65  # issues if the directories themselves have permissions such that you can't
66  # recurse in to them. If that happens, just rerun this a few times.
67  exit_status=0;
68  if [[ $use_slow == true ]]; then
69    # Process directories first so non-traversable ones are fixed as we go
70    find "$target" -type d ! -perm 755 -exec chmod $chmod_opts 755 {} \;
71    if [[ $? -ne 0 ]]; then exit_status=$?; fi
72    find "$target" -type f ! -perm 644 -exec chmod $chmod_opts 644 {} \;
73    if [[ $? -ne 0 ]]; then exit_status=$?; fi
74  else
75    find "$target" -type d ! -perm 755 -print0 | xargs -0 chmod $chmod_opts 755
76    if [[ $? -ne 0 ]]; then exit_status=$?; fi
77    find "$target" -type f ! -perm 644 -print0 | xargs -0 chmod $chmod_opts 644
78    if [[ $? -ne 0 ]]; then exit_status=$?; fi
79  fi
80  echo "Complete"
81  return $exit_status
82}
83
84function fixperms {
85  print -ru2 "fixperms has been deprecated. Use resetperms instead"
86  return 1
87}