int main (int argc, char** argv)
{
int src; /* file descriptor for source file */
int dest; /* file descriptor for destination file */
struct stat stat_buf; /* hold information about input file */
off_t offset = 0; /* byte offset used by sendfile */
ssize_t rc; /* return code from sendfile */
mill_init(-1, -1);
int done = 0;
go(dot(&done));
/* check for two command line arguments */
if (argc != 3) {
fprintf(stderr, "usage: %s <source> <destination>\n", argv[0]);
exit(1);
}
/* check that source file exists and can be opened */
src = open_a(argv[1], O_RDONLY, 0);
if (src == -1) {
fprintf(stderr, "unable to open '%s': %s\n", argv[1], strerror(errno));
exit(1);
}
/* get size and permissions of the source file */
fstat_a(src, &stat_buf);
/* open destination file */
dest = open_a(argv[2], O_WRONLY|O_CREAT, stat_buf.st_mode);
if (dest == -1) {
fprintf(stderr, "unable to open '%s': %s\n", argv[2], strerror(errno));
exit(1);
}
/* copy file using sendfile */
rc = sendfile_a(dest, src, &offset, stat_buf.st_size);
if (rc == -1) {
fprintf(stderr, "error from sendfile: %s\n", strerror(errno));
exit(1);
}
if (rc != stat_buf.st_size) {
fprintf(stderr, "incomplete transfer from sendfile: %d of %d bytes\n",
(int) rc,
(int)stat_buf.st_size);
exit(1);
}
/* clean up and exit */
close_a(dest);
close_a(src);
done = 1;
mill_waitall(-1);
return 0;
}
static void cable_vpi_close ( void )
{
if ( connection_socket != -1 )
close_a( connection_socket );
}
