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/* Tries to remove the current directory, which may succeed or
fail. The requirements in each case are different; refer to
the assignment for details. */
#include <syscall.h>
#include "tests/lib.h"
#include "tests/main.h"
static int
wrap_open (const char *name)
{
static int fds[8], fd_cnt;
int fd, i;
CHECK ((fd = open (name)) > 1, "open \"%s\"", name);
for (i = 0; i < fd_cnt; i++)
if (fds[i] == fd)
fail ("fd returned is not unique");
fds[fd_cnt++] = fd;
return fd;
}
void
test_main (void)
{
int root_fd, a_fd0;
char name[READDIR_MAX_LEN + 1];
root_fd = wrap_open ("/");
CHECK (mkdir ("a"), "mkdir \"a\"");
a_fd0 = wrap_open ("/a");
CHECK (!readdir (a_fd0, name), "verify \"/a\" is empty");
CHECK (inumber (root_fd) != inumber (a_fd0),
"\"/\" and \"/a\" must have different inumbers");
CHECK (chdir ("a"), "chdir \"a\"");
msg ("try to remove \"/a\"");
if (remove ("/a"))
{
msg ("remove successful");
CHECK (open ("/a") == -1, "open \"/a\" (must fail)");
CHECK (open (".") == -1, "open \".\" (must fail)");
CHECK (open ("..") == -1, "open \"..\" (must fail)");
CHECK (!create ("x", 512), "create \"x\" (must fail)");
}
else
{
int a_fd1, a_fd2, a_fd3;
msg ("remove failed");
CHECK (!remove ("../a"), "try to remove \"../a\" (must fail)");
CHECK (!remove (".././a"), "try to remove \".././a\" (must fail)");
CHECK (!remove ("/./a"), "try to remove \"/./a\" (must fail)");
a_fd1 = wrap_open ("/a");
a_fd2 = wrap_open (".");
CHECK (inumber (a_fd1) == inumber (a_fd2),
"\"/a\" and \".\" must have same inumber");
CHECK (inumber (root_fd) != inumber (a_fd1),
"\"/\" and \"/a\" must have different inumbers");
CHECK (chdir ("/a"), "chdir \"/a\"");
a_fd3 = wrap_open (".");
CHECK (inumber (a_fd3) == inumber (a_fd1),
"\".\" must have same inumber as before");
CHECK (chdir ("/"), "chdir \"/\"");
CHECK (!remove ("a"), "try to remove \"a\" (must fail: still open)");
}
CHECK (!readdir (a_fd0, name), "verify \"/a\" is empty");
}
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