+void pipe_handler (int sig) {
+ printf("SIGPIPE");
+}
+
+#define FILELEN 256
+
+int main(int argc, char **argv, char **envp) {
+
+ if ( (argc<2) || (strcmp(argv[1],"--help")==0) ) {
+ printf("Usage: vsyssh <vsys entry> [cmd]\n");
+ exit(1);
+ }
+
+ {
+ uid_t uid=getuid();
+ if (uid!=0) {
+ printf ("%s requires root privileges, please run under sudo\n",argv[0]);
+ exit(1);
+ }
+ }
+
+ {
+ int vfd0,vfd1;
+ char inf[FILELEN], outf[FILELEN];
+ int fatal=0;
+
+ signal(SIGPIPE,pipe_handler);
+
+ sprintf(inf,"/vsys/%s.in",argv[1]);
+ sprintf(outf,"/vsys/%s.out",argv[1]);
+ vfd0 = open(outf,O_RDONLY|O_NONBLOCK);
+ if (vfd0<0) {
+ printf("Error opening vsys channel %s (%m)\n",outf);
+ fatal=1;
+ }
+ vfd1 = open(inf,O_WRONLY);
+ if (vfd1<0) {
+ printf("Error opening vsys channel %s (%m)\n",inf);
+ fatal=1;
+ }
+
+ if (fcntl(vfd0, F_SETFL, O_RDONLY) == -1) {
+ printf("Error making pipe blocking: %m\n");
+ fatal=1;
+ }
+
+ if (fatal) { exit(1);}
+
+ if (argc<3) {
+ /* interactive mode */
+ fd_set set;
+ char do_input = 1, do_output = 1;
+
+ while (1) {
+ int ret;
+ printf("vsys>");fflush(stdout);
+ FD_ZERO(&set);
+ if (do_input)
+ FD_SET(0, &set);
+ if (do_output)
+ FD_SET(vfd0, &set);
+ ret = select(vfd0+1, &set, NULL, NULL, NULL);
+ if (FD_ISSET(0,&set)) {
+ char lineread[2048];
+ int ret;
+ ret=read(0,lineread,2048);
+ /*printf ("read=%d\n",ret);*/
+ if (ret == 0)
+ do_input = 0;
+ lineread[ret]='\0';
+ printf ("writing %s\n",lineread);
+ write(vfd1,lineread,ret);
+ }
+ if (FD_ISSET(vfd0,&set)) {
+ char lineread[2048];
+ int ret;
+ ret = read(vfd0,lineread,2048);
+ if (ret == 0)
+ break;
+ write(1,lineread,ret);
+ }