Full command line as it was typed

Question

I want to get the full command line as it was typed.

This:

\" \".join(sys.argv[:])

doesn\'t work here (deletes double quotes). Also I pr

Answer 1

Here's how you can do it from within the Python program to get back the full command string. Since the command-line arguments are already handled once before it's sent into sys.argv, this is how you can reconstruct that string.

commandstring = '';

for arg in sys.argv:
    if ' ' in arg:
        commandstring += '"{}"  '.format(arg);
    else:
        commandstring+="{}  ".format(arg);

print(commandstring);

Example:

Invoking like this from the terminal,

./saferm.py sdkf lsadkf -r sdf -f sdf -fs -s "flksjfksdkfj sdfsdaflkasdf"

will give the same string in commandstring:

./saferm.py sdkf lsadkf -r sdf -f sdf -fs -s "flksjfksdkfj sdfsdaflkasdf"

Answer 2

I am just 10.5 years late to the party, but... here it goes how I have handled exactly the same issue as the OP, under Linux (as others have said, in Windows that info may be possible to retrieve from the system).

First, note that I use the argparse module to parse passed parameters. Also, parameters then are assumed to be passed either as --parname=2, --parname="text", -p2 or -p"text".

call = ""
for arg in sys.argv:
    if arg[:2] == "--": #case1: longer parameter with value assignment
        before = arg[:arg.find("=")+1]
        after = arg[arg.find("=")+1:]
        parAssignment = True
    elif arg[0] == "-": #case2: shorter parameter with value assignment
        before = arg[:2]
        after = arg[2:]
        parAssignment = True
    else: #case3: #parameter with no value assignment
        parAssignment = False
    if parAssignment:
        try: #check if assigned value is "numeric"
            complex(after) # works for int, long, float and complex
            call += arg + " "
        except ValueError:
            call += before + '"' + after + '" '
    else:
        call += arg + " "

It may not fully cover all corner cases, but it has served me well (it can even detect that a number like 1e-06 does not need quotes).

In the above, for checking whether value passed to a parameter is "numeric", I steal from this pretty clever answer.