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-rw-r--r--examples/sshnetcat.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/examples/sshnetcat.c b/examples/sshnetcat.c
index 4ed408da..8ac5a212 100644
--- a/examples/sshnetcat.c
+++ b/examples/sshnetcat.c
@@ -87,13 +87,23 @@ static void select_loop(ssh_session session,ssh_channel channel){
int ret;
while(channel){
do{
+ int fd;
+
FD_ZERO(&fds);
if(!eof)
FD_SET(0,&fds);
timeout.tv_sec=30;
timeout.tv_usec=0;
- FD_SET(ssh_get_fd(session),&fds);
- maxfd=ssh_get_fd(session)+1;
+
+ fd = ssh_get_fd(session);
+ if (fd == -1) {
+ fprintf(stderr, "Error getting the session file descriptor: %s\n",
+ ssh_get_error(session));
+ return;
+ }
+ FD_SET(fd, &fds);
+ maxfd = fd + 1;
+
channels[0]=channel; // set the first channel we want to read from
channels[1]=NULL;
ret=ssh_select(channels,outchannels,maxfd,&fds,&timeout);