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ssh: print usage for unknown flags, cleanup

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This commit is contained in:
cinap_lenrek 2019-04-02 19:22:19 +02:00
parent 009b624fe6
commit 6d429cf9e8
1 changed files with 78 additions and 72 deletions
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150
sys/src/cmd/ssh.c
View file

@ -1157,7 +1157,7 @@ kfmt(Fmt *f)
void
usage(void)
{
fprint(2, "usage: %s [-dRX] [-t thumbfile] [-T tries] [-u user] [-h] [user@]host [-W remote!port] [cmd args...]\n", argv0);
fprint(2, "usage: %s [-dR] [-t thumbfile] [-T tries] [-u user] [-h] [user@]host [-W remote!port] [cmd args...]\n", argv0);
exits("usage");
}
@ -1217,6 +1217,8 @@ main(int argc, char *argv[])
mux = 1;
raw = 0;
break;
default:
usage();
} ARGEND;
if(host == nil){
@ -1287,47 +1289,84 @@ Next0: switch(recvpkt()){
recv.win = send.win = WinPackets*recv.pkt;
recv.chan = send.win = 0;
if(!mux){
/* open hailing frequencies */
if(remote != nil){
NetConnInfo *nci = getnetconninfo(nil, fd);
if(nci == nil)
sysfatal("can't get netconninfo: %r");
sendpkt("bsuuususu", MSG_CHANNEL_OPEN,
"direct-tcpip", 12,
recv.chan,
recv.win,
recv.pkt,
remote, strlen(remote),
port,
nci->laddr, strlen(nci->laddr),
atoi(nci->lserv));
free(nci);
} else {
sendpkt("bsuuu", MSG_CHANNEL_OPEN,
"session", 7,
recv.chan,
recv.win,
recv.pkt);
}
Next1: switch(recvpkt()){
default:
dispatch();
goto Next1;
case MSG_CHANNEL_OPEN_FAILURE:
if(unpack(recv.r, recv.w-recv.r, "_uus", &c, &b, &s, &n) < 0)
n = strlen(s = "???");
sysfatal("channel open failure: (%d) %.*s", b, utfnlen(s, n), s);
case MSG_CHANNEL_OPEN_CONFIRMATION:
break;
}
if(mux)
goto Mux;
if(unpack(recv.r, recv.w-recv.r, "_uuuu", &recv.chan, &send.chan, &send.win, &send.pkt) < 0)
sysfatal("bad channel open confirmation");
if(send.pkt <= 0 || send.pkt > MaxPacket)
send.pkt = MaxPacket;
/* open hailing frequencies */
if(remote != nil){
NetConnInfo *nci = getnetconninfo(nil, fd);
if(nci == nil)
sysfatal("can't get netconninfo: %r");
sendpkt("bsuuususu", MSG_CHANNEL_OPEN,
"direct-tcpip", 12,
recv.chan,
recv.win,
recv.pkt,
remote, strlen(remote),
port,
nci->laddr, strlen(nci->laddr),
atoi(nci->lserv));
free(nci);
} else {
sendpkt("bsuuu", MSG_CHANNEL_OPEN,
"session", 7,
recv.chan,
recv.win,
recv.pkt);
}
Next1: switch(recvpkt()){
default:
dispatch();
goto Next1;
case MSG_CHANNEL_OPEN_FAILURE:
if(unpack(recv.r, recv.w-recv.r, "_uus", &c, &b, &s, &n) < 0)
n = strlen(s = "???");
sysfatal("channel open failure: (%d) %.*s", b, utfnlen(s, n), s);
case MSG_CHANNEL_OPEN_CONFIRMATION:
break;
}
if(unpack(recv.r, recv.w-recv.r, "_uuuu", &recv.chan, &send.chan, &send.win, &send.pkt) < 0)
sysfatal("bad channel open confirmation");
if(send.pkt <= 0 || send.pkt > MaxPacket)
send.pkt = MaxPacket;
if(remote != nil)
goto Mux;
if(raw) {
rawon();
sendpkt("busbsuuuus", MSG_CHANNEL_REQUEST,
send.chan,
"pty-req", 7,
0,
tty.term, strlen(tty.term),
tty.cols,
tty.lines,
tty.xpixels,
tty.ypixels,
"", 0);
}
if(cmd == nil){
sendpkt("busb", MSG_CHANNEL_REQUEST,
send.chan,
"shell", 5,
0);
} else if(*cmd == '#') {
sendpkt("busbs", MSG_CHANNEL_REQUEST,
send.chan,
"subsystem", 9,
0,
cmd+1, strlen(cmd)-1);
} else {
sendpkt("busbs", MSG_CHANNEL_REQUEST,
send.chan,
"exec", 4,
0,
cmd, strlen(cmd));
}
Mux:
notify(catch);
atexit(shutdown);
@ -1352,39 +1391,6 @@ Next1: switch(recvpkt()){
/* child reads input and sends packets */
qlock(&sl);
if(remote == nil && !mux){
if(raw) {
rawon();
sendpkt("busbsuuuus", MSG_CHANNEL_REQUEST,
send.chan,
"pty-req", 7,
0,
tty.term, strlen(tty.term),
tty.cols,
tty.lines,
tty.xpixels,
tty.ypixels,
"", 0);
}
if(cmd == nil){
sendpkt("busb", MSG_CHANNEL_REQUEST,
send.chan,
"shell", 5,
0);
} else if(*cmd == '#') {
sendpkt("busbs", MSG_CHANNEL_REQUEST,
send.chan,
"subsystem", 9,
0,
cmd+1, strlen(cmd)-1);
} else {
sendpkt("busbs", MSG_CHANNEL_REQUEST,
send.chan,
"exec", 4,
0,
cmd, strlen(cmd));
}
}
for(;;){
static uchar buf[MaxPacket];
qunlock(&sl);