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channel_select(). this function rocks !

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I adapted the sample.c file. the select_loop function is bloated and fails to demonstrate how libssh is simple to handle...

it looks to run at first try.


git-svn-id: svn+ssh://svn.berlios.de/svnroot/repos/libssh/trunk@39 7dcaeef0-15fb-0310-b436-a5af3365683c
This commit is contained in:
Aris Adamantiadis
2005-10-25 23:02:25 +00:00
parent 5f7c84f900
commit d86f001754
5 changed files with 219 additions and 33 deletions
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62
sample.c
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@@ -122,10 +122,10 @@ void select_loop(SSH_SESSION *session,CHANNEL *channel){
struct timeval timeout;
char buffer[10];
BUFFER *readbuf=buffer_new();
CHANNEL *channels[]={channel,NULL};
CHANNEL *outchannel[2];
CHANNEL *channels[2];
int lus;
int eof=0;
int maxfd;
int ret;
while(channel){
/* when a signal is caught, ssh_select will return
@@ -141,23 +141,40 @@ void select_loop(SSH_SESSION *session,CHANNEL *channel){
FD_SET(0,&fds);
timeout.tv_sec=30;
timeout.tv_usec=0;
ret=ssh_select(channels,outchannel,0+1,&fds,&timeout);
FD_SET(ssh_get_fd(session),&fds);
maxfd=ssh_get_fd(session)+1;
ret=select(maxfd,&fds,NULL,NULL,&timeout);
if(ret==EINTR)
continue;
if(FD_ISSET(0,&fds)){
lus=read(0,buffer,10);
if(lus)
channel_write(channel,buffer,lus);
else {
eof=1;
channel_send_eof(channel);
}
}
if(FD_ISSET(ssh_get_fd(session),&fds)){
ssh_set_fd_toread(session);
}
channels[0]=channel; // set the first channel we want to read from
channels[1]=NULL;
ret=channel_select(channels,NULL,NULL,NULL); // no specific timeout - just poll
if(signal_delayed)
sizechanged();
} while (ret==SSH_EINTR);
if(FD_ISSET(0,&fds)){
lus=read(0,buffer,10);
if(lus){
channel_write(channel,buffer,lus);
}
else{
eof=1;
channel_send_eof(channel);
}
sizechanged();
} while (ret==EINTR || ret==SSH_EINTR);
// we already looked for input from stdin. Now, we are looking for input from the channel
if(channel && channel_is_closed(channel)){
channel_free(channel);
channel=NULL;
channels[0]=NULL;
}
if(outchannel[0]){
while(channel && channel_poll(outchannel[0],0)){
lus=channel_read(outchannel[0],readbuf,0,0);
if(channels[0]){
while(channel && channel_is_open(channel) && channel_poll(channel,0)){
lus=channel_read(channel,readbuf,0,0);
if(lus==-1){
ssh_say(0,"error reading channel : %s\n",ssh_get_error(session));
return;
@@ -165,12 +182,12 @@ void select_loop(SSH_SESSION *session,CHANNEL *channel){
if(lus==0){
ssh_say(1,"EOF received\n");
channel_free(channel);
channel=NULL;
channel=channels[0]=NULL;
} else
write(1,buffer_get(readbuf),lus);
}
while(channel && channel_poll(outchannel[0],1)){ /* stderr */
lus=channel_read(outchannel[0],readbuf,0,1);
while(channel && channel_is_open(channel) && channel_poll(channel,1)){ /* stderr */
lus=channel_read(channel,readbuf,0,1);
if(lus==-1){
ssh_say(0,"error reading channel : %s\n",ssh_get_error(session));
return;
@@ -178,12 +195,12 @@ void select_loop(SSH_SESSION *session,CHANNEL *channel){
if(lus==0){
ssh_say(1,"EOF received\n");
channel_free(channel);
channel=NULL;
channel=channels[0]=NULL;
} else
write(2,buffer_get(readbuf),lus);
}
}
if(channel && !channel_is_open(channel)){
if(channel && channel_is_closed(channel)){
channel_free(channel);
channel=NULL;
}
@@ -191,6 +208,7 @@ void select_loop(SSH_SESSION *session,CHANNEL *channel){
buffer_free(readbuf);
}
void shell(SSH_SESSION *session){
CHANNEL *channel;
struct termios terminal_local;