Well I am doing asn assignment in which we have to in some way take shell commands and then execute them thru "execv".

I have done the part of that relating to pipes, i.e I have implemented shell commands which are something like this:

Shell@ A|B

now I have to implement the "A>B" command and I am getting trouble here, So far I have done the following:




int fds[2];
int status;
int pid;
char *tmpargv[3];
char comm1[]="/bin/";
pipe(fds);

if(strcmp(argv[2],"g")==0)
{

if(fork()==0)
{
close(0);
dup(fds[1]);
close(fds[0]);
close(fds[1]);

strcpy(tmpargv[0],comm1);
strcat(tmpargv[0],argv[1]);
tmpargv[1]=0;
execv( tmpargv[0], tmpargv );
perror("execv");

exit(1);
}
wait(&status);


if(fork()==0)
{
close(1);
dup(fds[0]);
// close(fds[0]);
close(fds[1]);

strcpy(tmpargv[0],comm1);
strcat(tmpargv[0],argv[3]);
tmpargv[1]=0;

execv( tmpargv[0], tmpargv );
exit(1);
}
wait(&status);


}
return 0;
}




Here 'g' is for '>', And the above code is only executing the first command and not the 2nd one.
Please Help!

Isn't the argument after the ">" a filename, not an executable? i.e. "ls > filename".