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ssh: make number of retries configurable

--- a/sys/man/1/ssh

+++ b/sys/man/1/ssh

@@ -60,6 +60,13 @@

 .B -R

 option.

 .PP

+If

+.I keyboard-interactive

+authentication fails, by default it is retried three times.

+The number of tries can be changed with

+.BR -T .

+Setting it to zero disables keyboard-interactive authentication.

+.PP

 The

 .B -d

 option enables debug output.

--- a/sys/src/cmd/ssh.c

+++ b/sys/src/cmd/ssh.c

@@ -52,9 +52,7 @@

 	WinPackets = 8,		// (1<<15) * 8 = 256K

 };

-enum {

-	MaxPwTries = 3 // retry this often for keyboard-interactive

-};

+int MaxPwTries = 3; // retry this often for keyboard-interactive

 typedef struct

 {

@@ -1151,6 +1149,10 @@

 		break;

 	case 't':

 		thumbfile = EARGF(usage());

+		break;

+	case 'T':

+		MaxPwTries = strtol(EARGF(usage()), &s, 0);

+		if(*s != 0) usage();

 		break;

 	} ARGEND;

-- 

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