rfio_popen
starts a process and opens a pipe to it.
command
is a pointer to a string specifying the shell command to be executed.
type
is a mode indicator for the pipe. One of the characters "r" or "w".
rfio_pclose
waits for the forked process to terminate and returns the exit status of the
command.
EXAMPLE
int c;
FILE *rf;
rf = rfio_popen (command, "r");
if (rf == NULL) {
rfio_perror ("rfio_popen");
exit (1);
}
while ((c = rfio_pread (buf, 1, sizeof(buf), rf)) > 0) {
...
}
c = rfio_pclose (rf);
RETURN VALUE
This routine returns NULL if the operation failed or a non-NULL pointer to a FILE structure if the operation was successful. If it fails, serrno variable is set appropriately.