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