Re: Redirection issue


Bo Yang wrote:

int
redir_cmd(char *argv[],char *in, char *out)
{
int i;
int pid, status;
int fd1, fd2;
int dummy;

if (strcmp(argv[0],"exit")==0)
return do_exit(argv);
for(i=0;argv[i]!=NULL;i++)
printf("argv[%i]=\"%s\";\n",i,argv[i]);

if (strcmp(argv[0],"cd")==0)
{
return chdir(*argv);
}

if (fork() == 0) {
fd1 = open(in, O_RDONLY);
if (fd1 < 0) {
perror("can't open file : in");
exit(1);
}

if (dup2(fd1, out) != 0) {
You dup the out to fd1 , but out is a char pointer ,
what do you want to do ?
This must to be failed .

You can just dup the stdin to in , and dup stdout to out .

Hi Bo,

I have changed the fd1 and fd2 types and the redirection is now
working. The shell compiles . The commands of the input file
(input.txt) have been executed and the output is sent to the outout
file (ouput.txt).
Now, I have another issues in the sens that the simple command and the
commands passed in a file are not executed.
In the main function I have treated 3 cases : simple command, input
file, and redirection. But the problem may be in the rediretion
(redirect_cmd) function.

Any idea please.

Thanks,

Souissipro

.

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