to make the 2 BUGs more clear:
* in the while loop of processing options with '-' using getopt_long():
$ tftpd/tftpd -u SYSTEM -L -vvvv -p -c -s /var/log
1. it seems the '-<x> <value>'(-u SYSTEM) argument pairs that pass the second
argument as value have the value lost and the variable get null value. the
'-<x>'(-L -p -c -s; -vvvv is a special one) type arguments that set some flag
seems work well.
2. the value of 'optind' is always 1 in each loop(-vvvv is a special one?).
but it would have be increased by 1 in each loop. after all the '-<x>' and
'-<x> <value>' arguments being processed, its value.
3. because the value of optind not increased 1 for each loop, so that the
arguments '/var/log' at the end that pass value(s) get processed in a wrong way
as the optind is used for 'argv[optind]' to set value to some variable(s).
==================
$ tftpd/tftpd -u SYSTEM -L -vvvv -p -c -s /var/log
cygwin: user=(null) optarg=(null) optind=1
cygwin: standalone=1 optind=1
cygwin: nodaemon=1 optind=1
cygwin: verbosity=1 optind=1
cygwin: verbosity=2 optind=1
cygwin: verbosity=3 optind=1
cygwin: verbosity=4 optind=1
cygwin: uniperm=1 optind=1
cygwin: cancreate=1 optind=1
cygwin: secure=1 optind=1
cygwin: dirs[0]=-u argv[1]=-u
cygwin: dirs[1]=SYSTEM argv[2]=SYSTEM
cygwin: dirs[2]=-L argv[3]=-L
cygwin: dirs[3]=-vvvv argv[4]=-vvvv
cygwin: dirs[4]=-p argv[5]=-p
cygwin: dirs[5]=-c argv[6]=-c
cygwin: dirs[6]=-s argv[7]=-s
cygwin: dirs[7]=/var/log argv[8]=/var/log
==================
$ tftpd/tftpd --user SYSTEM --foreground --verbose --verbose --verbose --verbos
e --permissive --create --secure /var/log
cygwin: user=(null) optarg=(null) optind=1
cygwin: standalone=1 optind=1
cygwin: nodaemon=1 optind=1
cygwin: verbosity=1 optind=1
cygwin: verbosity=2 optind=1
cygwin: verbosity=3 optind=1
cygwin: verbosity=4 optind=1
cygwin: uniperm=1 optind=1
cygwin: cancreate=1 optind=1
cygwin: secure=1 optind=1
cygwin: dirs[0]=--user argv[1]=--user
cygwin: dirs[1]=SYSTEM argv[2]=SYSTEM
cygwin: dirs[2]=--foreground argv[3]=--foreground
cygwin: dirs[3]=--verbose argv[4]=--verbose
cygwin: dirs[4]=--verbose argv[5]=--verbose
cygwin: dirs[5]=--verbose argv[6]=--verbose
cygwin: dirs[6]=--verbose argv[7]=--verbose
cygwin: dirs[7]=--permissive argv[8]=--permissive
cygwin: dirs[8]=--create argv[9]=--create
cygwin: dirs[9]=--secure argv[10]=--secure
cygwin: dirs[10]=/var/log argv[11]=/var/log
==================
* recv() returns -1 with error 14 when it read acknolege packet from the
socket, the normal return value is 4.
==================
cygwin: recv() rv = -1 errno=14
cygwin: recv() rv = -1 errno=14
==================
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