Pre-pend sudo to execution of binaries in /sbin about bash-preexec HOT 6 CLOSED

No, I don't think so. Function executions via the precmd-hook are associated with the primary prompt, which comes into play after the whole command line has been executed. Your function just runs the command line as normal, but cmdpath is always empty. Replace the body with echo "$1" and then you can see that precmd doesn't take an argument at all.

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The use of a preexec-hook for this task is really complicated, because you must work with extdebug (?!). Especially, when the command line is not a one-word simple command or contains command subsitution. I would rather use aliases:

for p in {/usr,}/sbin/?*;
do 
    alias ${p##*/}="sudo $p ";
done;

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Okay, thanks for clarifying!

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@d630 thanks for providing support. Closing, feel free to reopen if needed.

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By the way, it's easier to replace/substitute the command line using a preread-hook in bpx. But parsing of complicated lines is still very tricky. And there is no thing like "substitute pipeline 3, only if pipeline 2 has failed".

Exp1:

$ shopt -u expand_aliases;
$ function preread { READLINE_LINE="ls / | head -n 1"; };
$ preread_functions=(preread);
$ ls
bin
$ history 2
 4  ls / | head -n 1
 5  history 2

Exp2:

$ unalias FOO;
$ alias 'ls=ls -1'
$ function preread { READLINE_LINE=${rl0//FOO/"ls / | head -n 1"}; }
$ preread_functions=(preread);
$ echo; FOO; echo; echo $(FOO)

bin

bin
$ history 2
 4  echo; ls / | head -n 1; echo; echo $(ls / | head -n 1)
 5  history 2

Exp3:

$ alias 'ls=/bin/ls / | head -n 1';
$ unalias head;
$ function preread { __bpx_set_rl2; READLINE_LINE=${rl2[@]}; };
$ preread_functions=(preread);
$ ls; ls && ls
bin
bin
bin
$ history 2
 4  /bin/ls -1 / | head -n 1; /bin/ls -1 / | head -n 1 && /bin/ls -1 / | head -n 1
 5  history 2

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For others who are working on this and want a bash + zsh solution, I wrote this ugly hack based on @d630's first message:

for x in $(echo "$PATH" | tr ':' ' '); do
  for p in $x/?*; do
    name="${p##*/}"
    alias "$name"="echo $name"
  done
done

Example:

[~] echo hello world
echo hello world
[~] whoami
echo whoami
[~] id
echo id
[~] echo "this is a test"
echo this is a test
[~] printf "%s" "asdf"
echo printf %s asdf

In a way it works?

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