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ftpd: implement "OPTS UTF-8 ON", fix uninitialized printing uninitialized memory in HELP command

--- a/sys/src/cmd/ip/ftpd.c

+++ b/sys/src/cmd/ip/ftpd.c

@@ -49,6 +49,7 @@

 int	modecmd(char*);

 int	namelistcmd(char*);

 int	nopcmd(char*);

+int	optscmd(char*);

 int	passcmd(char*);

 int	pasvcmd(char*);

 int	portcmd(char*);

@@ -96,6 +97,7 @@

 	{ "mode",	modecmd,	0, },

 	{ "nlst",	namelistcmd,	1, },

 	{ "noop",	nopcmd,		0, },

+	{ "opts",	optscmd,	0, },

 	{ "pass",	passcmd,	0, },

 	{ "pasv",	pasvcmd,	1, },

 	{ "pwd",	pwdcmd,		0, },

@@ -478,7 +480,21 @@

 	return bytes;

 }

+int

+optscmd(char *arg)

+{

+	char *p;

+	if(p = strchr(arg, ' '))

+		*p = 0;

+	if(cistrcmp(arg, "UTF-8") == 0){

+		reply("200 Command okay");

+		return 0;

+	}

+	reply("502 %s option not implemented", arg);

+	return 0;

+}

+

 /*

  *  just reply OK

  */

@@ -1593,6 +1609,7 @@

 	USED(arg);

 	reply("214- the following commands are implemented:");

+	buf[0] = 0;

 	p = buf;

 	e = buf+sizeof buf;

 	for(i = 0; cmdtab[i].name; i++){

-- 

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