In its example of reading from a file the kurdish way, the hurd hacking
guide mallocs a buffer an passes it to io_read. The program doesn't
call free() on the malloced buffer but when I add it it doesn't complain.
/* Read */
err = io_read (f, &buf, &amount, -1, amount);
if (err)
error (1, errno, "Could not read from file %s", argv[1]);
buf[amount] = '\0';
mach_port_deallocate (mach_task_self (), f);
/* Output */
printf ("%s", buf);
free(buf); /* added by me */
But when I try to do the same in my translator, I get a "free(): invalid
pointer"
error. Here is the relevant portion of my code.
filebuf = malloc(s.st_size + 1);
err = io_read(innerdir, &filebuf, &amt_written, 0, s.st_size);
free(filebuf);
I put the free right after the io_read to test whether something I was
doing after
reading it into the buffer might be causing the error, but it still
occurred.
The program works fine without mallocing the buffer at all, and it works
fine when
I malloc but don't free. But both of those would seem to create memory
leaks. Can
anyone help me understand what's going on here?
Thanks
*Andrew Eggenberger*
