sysadmin@eita:~$ gdb --arg scanimage -h -d 'brother5:net1:dev0'
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Reading symbols from scanimage...(no debugging symbols found)...done.
(gdb) r
Starting program: /usr/bin/scanimage -h -d brother5:net1:dev0
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Usage: scanimage [OPTION]...

Start image acquisition on a scanner device and write image data to
standard output.

Parameters are separated by a blank from single-character options (e.g.
-d epson) and by a "=" from multi-character options (e.g. --device-name=epson).
-d, --device-name=DEVICE   use a given scanner device (e.g. hp:/dev/scanner)
    --format=pnm|tiff|png|jpeg  file format of output file
-i, --icc-profile=PROFILE  include this ICC profile into TIFF file
-L, --list-devices         show available scanner devices
-f, --formatted-device-list=FORMAT similar to -L, but the FORMAT of the output
                           can be specified: %d (device name), %v (vendor),
                           %m (model), %t (type), %i (index number), and
                           %n (newline)
-b, --batch[=FORMAT]       working in batch mode, FORMAT is `out%d.pnm' `out%d.tif'
                           `out%d.png' or `out%d.jpg' by default depending on --format
    --batch-start=#        page number to start naming files with
    --batch-count=#        how many pages to scan in batch mode
    --batch-increment=#    increase page number in filename by #
    --batch-double         increment page number by two, same as
                           --batch-increment=2
    --batch-print          print image filenames to stdout
    --batch-prompt         ask for pressing a key before scanning a page
    --accept-md5-only      only accept authorization requests using md5
-p, --progress             print progress messages
-n, --dont-scan            only set options, don't actually scan
-T, --test                 test backend thoroughly
-A, --all-options          list all available backend options
-h, --help                 display this help message and exit
-v, --verbose              give even more status messages
-B, --buffer-size=#        change input buffer size (in kB, default 32)
-V, --version              print version information
[New Thread 0x7ffff3df7700 (LWP 11395)]
scanimage: rounded value of br-x from 215.9 to 215.88
scanimage: rounded value of br-y from 355.6 to 355.567

Options specific to device `brother5:net1:dev0':
  :
    --mode 24bit Color[Fast]|Black & White|True Gray|Gray[Error Diffusion] [24bit Color[Fast]]
        Select the scan mode
    --resolution 100|150|200|300|400|600|1200dpi [100]
        Sets the resolution of the scanned image.
    --source Automatic Document Feeder(left aligned)|Automatic Document Feeder(center aligned)|Automatic Document Feeder(left aligned,Duplex)|Automatic Document Feeder(center aligned,Duplex) [Automatic Document Feeder(left aligned)]
        Selects the scan source (such as a document-feeder).

Thread 1 "scanimage" received signal SIGSEGV, Segmentation fault.
0x000055555555982f in ?? ()
(gdb) backtrace
#0  0x000055555555982f in ?? ()
#1  0x000055555555b681 in ?? ()
#2  0x0000555555556da6 in ?? ()
#3  0x00007ffff734e1c1 in __libc_start_main (main=0x555555556320, argc=4, argv=0x7fffffffdf48, init=<optimized out>, fini=<optimized out>, 
    rtld_fini=<optimized out>, stack_end=0x7fffffffdf38) at ../csu/libc-start.c:308
#4  0x0000555555558c5a in ?? ()