fuzz file is not used as stdin for local run

[BinCaoWR]

Looks like fuzz file is not used as stdin for local run.

Test command:
./litefuzz.py -l -c "test/linux/b" -i input/test -o output/test -n 5 --debug

Test log:

I'm running on linux with python 3.10.12

mode is 1

[INFO] run dir: /tmp/litefuzz/8207/

[INFO] tmp dir: /tmp/litefuzz

No malloc debuggers enabled

--========================--
--======| litefuzz |======--
--========================--

entering fuzz.main()

entering checkForExe() with name=gdb

len(cmdline) = 1
entering checkForExe() with name=test/linux/b


cmdline: ['test/linux/b']

config.target = b

[STATS]
pid:        1213546
run id:     8207
cmdline:    test/linux/b
crash dir:  output/test
input dir:  input/test
inputs:     1
iterations: 5
mutator:    random(mutators)

-------------------------------- start iteration 1 --------------------------------


input: test.txt

entering readBytes() with path=/home/wrsadmin/Workspace/projects/litefuzz/input/test/test.txt

entering setupNewIteration()

ext=txt
current arg: test/linux/b

writing data to fuzz file @ /tmp/litefuzz/8207/fuzz_kjrhthkc.txt


[MUTATOR] carve

len(data): 3
mutant=3

i=1, o=0


entering writeBytes() with path=/tmp/litefuzz/8207/fuzz_kjrhthkc.txt

current_input: /home/wrsadmin/Workspace/projects/litefuzz/input/test/test.txt

cmdline:       ['test/linux/b']

killing any running processes named b before running a new one

entering killProcessByName() with name=b


[INFO] unix.run() @ starting target process: ['test/linux/b']

unix.run() ['test/linux/b'] started @ pid=1213565

entering checkForCrash()

@ 1/5 (0 crashes, 0 duplicates, ~0:00:00 remaining)
copying /tmp/litefuzz/8207/fuzz_kjrhthkc.out to /tmp/litefuzz/out

entering killProcess() with pid=1213565


[INFO] failed to terminate pid=1213565: [Errno 3] No such process

-------------------------------- end iteration 1 --------------------------------

-------------------------------- start iteration 2 --------------------------------


input: test.txt

entering readBytes() with path=/home/wrsadmin/Workspace/projects/litefuzz/input/test/test.txt

entering setupNewIteration()

ext=txt
current arg: test/linux/b
fuzz_file_prev: /tmp/litefuzz/8207/fuzz_kjrhthkc.txt

writing data to fuzz file @ /tmp/litefuzz/8207/fuzz_ngyydcgy.txt


[MUTATOR] remove

len(data): 3
i=1 @ x=2


entering writeBytes() with path=/tmp/litefuzz/8207/fuzz_ngyydcgy.txt

current_input: /home/wrsadmin/Workspace/projects/litefuzz/input/test/test.txt

cmdline:       ['test/linux/b']

killing any running processes named b before running a new one

entering killProcessByName() with name=b


[INFO] unix.run() @ starting target process: ['test/linux/b']

unix.run() ['test/linux/b'] started @ pid=1213567

entering checkForCrash()

@ 2/5 (0 crashes, 0 duplicates, ~0:00:00 remaining)
copying /tmp/litefuzz/8207/fuzz_ngyydcgy.out to /tmp/litefuzz/out

entering killProcess() with pid=1213567


[INFO] failed to terminate pid=1213567: [Errno 3] No such process

-------------------------------- end iteration 2 --------------------------------

The debug log shows current_input (which is used as stdin in run.py) is always the input file instead of the fuzz file for each iteration.
Looks like we should either set config.current_input = settings.FUZZ_FILE in fuzz.py, or use settings.FUZZ_FILE as stdin in run.py.