tracing parse_input logic

gistfile1.txt

echo hi > file &

START:

start = 0
arguments = 1
last_char_valid updated to 1

... space found (echo )
start = 0
end = 4 (index where ' ' is)
last_char_valid updated to 0

... next word started (echo hi)
arguments = 2
last_char_valid updated to 1

... space found (echo hi )
end = 7
last_char_valid updated to 1

... redirect found (echo hi >)
# check if redirect is > start (it is not because it's been set to 0 to start with)
redirect = 8
last_char_valid stays at 1

... space found (echo hi > )
end = 9
last_char_valid updated to 0

... next word started (echo hi > file)
arguments = 3
last_char_valid updated to 1

... space found (echo hi > file )
end = 14
last_char_valid updated to 0

... ampersand pid found (echo hi > file &)
# last_char_valid == 0 so end not set
# output_len = [end - redirect] == [14 - 8]
output_len = 6
# output[0] == input[8] and so on
i = 9, j = 0
output[] = " file\0"

end = 8

# command_len = 8 - 0 + 9
command_len = 7
command = "echo hi\0"

command_args = [echo, hi]
output_tokens = [file]

# everything resets and start again