How do I input files to linux executable?

Question

Here is part of my linux bash script. I need to input some command line arguments to ./AAAAA executable, but it does not see them. When I wrap them up with <<end .. end, it shows me an "unexpected EOF" error. I've tried to put all input files around .. - didn't help either. I am running out of ideas.

while [ "$month" -le 9 ]
do
            while [ "$day" -le 31 ]
            do
                            "AAAA_15-0$month-$day_text.ff"
                            xargs ./EXECUTABLE <<EOF
                            "AAAA_15-0$month-$day_text.ff"
                            "AAAA_15-0$month-$day_text"
                            "AAAA_15-0$month-$day_text.det"
                            ZZZ.txt
                            XXX.txt
                            CCC.txt
                            VVV.txt
                            BBB.txt
                            EOF
                            mv "AAAA_15-0$month-$day_text"*"."* "15-0$month-$day_text"
                            day=`expr $day + 1`
            done
            day=`expr $month + 1`

done

We don't really know how your ./AAAAA executable works, so it's hard to say. Does it have any documentation ? Or do you have its source code ? — nos
– nos, Commented Dec 16, 2016 at 17:01
What you have is in fact not an argument, it's data redirected to the stdin (standard input stream). So your executable should read it from the stdin stream. — David Ferenczy Rogožan
– David Ferenczy Rogožan, Commented Dec 16, 2016 at 17:05

hek2mgl · Accepted Answer · 2016-12-16 17:08:50Z

1

Use xargs:

xargs ./AAAA <<EOF
XXXX.ff
XXXX.det
CCCC.txt
BBBB.txt
NNNN.txt
MMMM.txt
LLLL.txt
EOF

answered Dec 16, 2016 at 17:08

hek2mgl

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9 Comments

Igor Buleza Over a year ago

The problem is that my filenames are prone to change, since they are inside a cycle. I just simplified it in my question....

hek2mgl Over a year ago

Your question should contain enough information to understand your problem. Can you edit it?

Igor Buleza Over a year ago

My bad. I put all script there now. EOF sollution gives me here-document at line 20 delimited by end-of-file.

hek2mgl Over a year ago

About your problem, the ending EOF needs to be placed at the very beginning of the line (meaning position 0, even if that might look odd for you)

sjsam Over a year ago

Thanks for the pointer on EOF at comment#5. If auto-indenting is enabled, this would mean that an error would creep in accidentally which is very difficult to detect.

|

Barmar · Accepted Answer · 2016-12-16 18:10:30Z

0

When you use <<EOF, the EOF has to be at the beginning of the line, it won't be found if it's indented.

while [ "$month" -le 9 ]
do
    while [ "$day" -le 31 ]
    do
        "AAAA_15-0$month-$day_text.ff"
        xargs ./EXECUTABLE <<EOF
        "AAAA_15-0$month-$day_text.ff"
        "AAAA_15-0$month-$day_text"
        "AAAA_15-0$month-$day_text.det"
        ZZZ.txt
        XXX.txt
        CCC.txt
        VVV.txt
        BBB.txt
EOF
        mv "AAAA_15-0$month-$day_text"*"."* "15-0$month-$day_text"
        day=`expr $day + 1`
    done
    day=`expr $month + 1`
done

You can instead use <<-EOF. This allows it to be indented, but the indentation must be Tab characters, not spaces.

answered Dec 16, 2016 at 18:10

Barmar

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