Minix2.0/src/test/test26.c
/* test26: link() unlink() Aithor: Jan-Mark Wams (jms@cs.vu.nl) */
/*
* Not tested readonly file systems
* Not tested fs full
* Not tested unlinking bussy files
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <limits.h>
#include <string.h>
#include <time.h>
#include <stdio.h>
int errct = 0;
int subtest = 1;
int superuser;
char MaxName[NAME_MAX + 1]; /* Name of maximum length */
char MaxPath[PATH_MAX]; /* Same for path */
char ToLongName[NAME_MAX + 2]; /* Name of maximum +1 length */
char ToLongPath[PATH_MAX + 1]; /* Same for path, both too long */
#define MAX_ERROR 4
#define ITERATIONS 4
#define System(cmd) if (system(cmd) != 0) printf("``%s'' failed\n", cmd)
#define Chdir(dir) if (chdir(dir) != 0) printf("Can't goto %s\n", dir)
#define Stat(a,b) if (stat(a,b) != 0) printf("Can't stat %s\n", a)
_PROTOTYPE(void main, (int argc, char *argv[]));
_PROTOTYPE(void test26a, (void));
_PROTOTYPE(void test26b, (void));
_PROTOTYPE(void test26c, (void));
_PROTOTYPE(int stateq, (struct stat *stp1, struct stat *stp2));
_PROTOTYPE(void makelongnames, (void));
_PROTOTYPE(void e, (int __n));
_PROTOTYPE(void quit, (void));
void main(argc, argv)
int argc;
char *argv[];
{
int i, m = 0xFFFF;
sync();
if (argc == 2) m = atoi(argv[1]);
printf("Test 26 ");
fflush(stdout);
System("rm -rf DIR_26; mkdir DIR_26");
Chdir("DIR_26");
superuser = (getuid() == 0);
makelongnames();
for (i = 0; i < ITERATIONS; i++) {
if (m & 0001) test26a();
if (m & 0002) test26b();
if (m & 0004) test26c();
}
quit();
}
void test26a()
{ /* Test normal operation. */
struct stat st1, st2, st3;
time_t time1;
subtest = 1;
/* Clean up any residu. */
System("rm -rf ../DIR_26/*");
System("touch foo"); /* make source file */
Stat("foo", &st1); /* get info of foo */
Stat(".", &st2); /* and the cwd */
time(&time1);
while (time1 >= time((time_t *)0))
; /* wait a sec */
if (link("foo", "bar") != 0) e(1); /* link foo to bar */
Stat("foo", &st3); /* get new status */
if (st1.st_nlink + 1 != st3.st_nlink) e(2); /* link count foo up 1 */
#ifndef V1_FILESYSTEM
if (st1.st_ctime >= st3.st_ctime) e(3); /* check stattime changed */
#endif
Stat(".", &st1); /* get parend dir info */
if (st2.st_ctime >= st1.st_ctime) e(4); /* ctime and mtime */
if (st2.st_mtime >= st1.st_mtime) e(5); /* should be updated */
Stat("bar", &st2); /* get info of bar */
if (st2.st_nlink != st3.st_nlink) e(6); /* link count foo == bar */
if (st2.st_ino != st3.st_ino) e(7); /* ino should be same */
if (st2.st_mode != st3.st_mode) e(8); /* check mode same */
if (st2.st_uid != st3.st_uid) e(9); /* check uid same */
if (st2.st_gid != st3.st_gid) e(10); /* check gid same */
if (st2.st_size != st3.st_size) e(11); /* check size */
if (st2.st_ctime != st3.st_ctime) e(12); /* check ctime */
if (st2.st_atime != st3.st_atime) e(13); /* check atime */
if (st2.st_mtime != st3.st_mtime) e(14); /* check mtime */
Stat("foo", &st1); /* get fooinfo */
Stat(".", &st2); /* get dir info */
time(&time1);
while (time1 >= time((time_t *)0))
; /* wait a sec */
if (unlink("bar") != 0) e(15);/* rm bar */
if (stat("bar", &st2) != -1) e(16); /* it's gone */
Stat("foo", &st3); /* get foo again */
if (st1.st_nlink != st3.st_nlink + 1) e(17); /* link count back to normal */
#ifndef V1_FILESYSTEM
if (st1.st_ctime >= st3.st_ctime) e(18); /* check ctime */
#endif
Stat(".", &st3); /* get parend dir info */
if (st2.st_ctime >= st3.st_ctime) e(19); /* ctime and mtime */
if (st2.st_mtime >= st3.st_mtime) e(20); /* should be updated */
}
void test26b()
{
register int nlink;
char *bar = "bar.xxx"; /* the xxx wil hold a number from 000 to 999 */
struct stat st, st2;
subtest = 2;
/* Clean up any residu. */
System("rm -rf ../DIR_26/*");
/* Test what happens if we make LINK_MAX number of links. */
System("touch foo");
if (LINK_MAX >= 999) e(1); /* check 3 xs are enough */
for (nlink = 2; nlink <= LINK_MAX; nlink++) {
bar[4] = (char) ((nlink / 100) % 10) + '0';
bar[5] = (char) ((nlink / 10) % 10) + '0';
bar[6] = (char) (nlink % 10) + '0';
if (link("foo", bar) != 0) e(2);
Stat(bar, &st);
if (st.st_nlink != nlink) e(3);
Stat("foo", &st);
if (st.st_nlink != nlink) e(4);
}
/* Check if we have LINK_MAX links that are all the same. */
Stat("foo", &st);
if (st.st_nlink != LINK_MAX) e(5);
for (nlink = 2; nlink <= LINK_MAX; nlink++) {
bar[4] = (char) ((nlink / 100) % 10) + '0';
bar[5] = (char) ((nlink / 10) % 10) + '0';
bar[6] = (char) (nlink % 10) + '0';
Stat(bar, &st2);
if (!stateq(&st, &st2)) e(6);
}
/* Test no more links are possible. */
if (link("foo", "nono") != -1) e(7);
if (stat("nono", &st) != -1) e(8);
Stat("foo", &st);
if (st.st_nlink != LINK_MAX) e(9); /* recheck the number of links */
/* Now unlink() the bar.### files */
for (nlink = LINK_MAX; nlink >= 2; nlink--) {
bar[4] = (char) ((nlink / 100) % 10) + '0';
bar[5] = (char) ((nlink / 10) % 10) + '0';
bar[6] = (char) (nlink % 10) + '0';
Stat(bar, &st);
if (st.st_nlink != nlink) e(10);
Stat("foo", &st2);
if (!stateq(&st, &st2)) e(11);
if (unlink(bar) != 0) e(12);
}
Stat("foo", &st);
if (st.st_nlink != 1) e(13); /* number of links back to 1 */
/* Test max path ed. */
if (link("foo", MaxName) != 0) e(14); /* link to MaxName */
if (unlink(MaxName) != 0) e(15); /* and remove it */
MaxPath[strlen(MaxPath) - 2] = '/';
MaxPath[strlen(MaxPath) - 1] = 'a'; /* make ././.../a */
if (link("foo", MaxPath) != 0) e(16); /* it should be */
if (unlink(MaxPath) != 0) e(17); /* (un)linkable */
System("rm -f ../DIR_26/*"); /* clean cwd */
}
void test26c()
{
subtest = 3;
/* Clean up any residu. */
System("rm -rf ../DIR_26/*");
/* Check some simple things. */
if (link("bar/nono", "nono") != -1) e(1); /* nonexistent */
if (errno != ENOENT) e(2);
Chdir("..");
System("touch DIR_26/foo");
System("chmod 677 DIR_26"); /* make inaccesable */
if (!superuser) {
if (unlink("DIR_26/foo") != -1) e(3);
if (errno != EACCES) e(4);
}
if (link("DIR_26/bar/nono", "DIR_26/nono") != -1) e(5); /* nono no be */
if (superuser) {
if (errno != ENOENT) e(6); /* su has access */
}
if (!superuser) {
if (errno != EACCES) e(7); /* we don't ;-) */
}
System("chmod 577 DIR_26"); /* make unwritable */
if (superuser) {
if (link("DIR_26/foo", "DIR_26/nono") != 0) e(8);
if (unlink("DIR_26/nono") != 0) e(9);
}
if (!superuser) {
if (link("DIR_26/foo", "DIR_26/nono") != -1) e(10);
if (errno != EACCES) e(11);
if (unlink("DIR_26/foo") != -1) e(12); /* try to rm foo/foo */
if (errno != EACCES) e(13);
}
System("chmod 755 DIR_26"); /* back to normal */
Chdir("DIR_26");
/* Too-long path and name test */
ToLongPath[strlen(ToLongPath) - 2] = '/';
ToLongPath[strlen(ToLongPath) - 1] = 'a'; /* make ././.../a */
if (link("foo", ToLongPath) != -1) e(18); /* path is too long */
if (errno != ENAMETOOLONG) e(19);
if (unlink(ToLongPath) != -1) e(20); /* path is too long */
if (errno != ENAMETOOLONG) e(21);
if (link("foo", "foo") != -1) e(22); /* try linking foo to foo */
if (errno != EEXIST) e(23);
if (link("foo", "bar") != 0) e(24); /* make a link to bar */
if (link("foo", "bar") != -1) e(25); /* try linking to bar again */
if (errno != EEXIST) e(26);
if (link("foo", "bar") != -1) e(27); /* try linking to bar again */
if (errno != EEXIST) e(28);
if (unlink("nono") != -1) e(29); /* try rm <not exist> */
if (errno != ENOENT) e(30);
if (unlink("") != -1) e(31); /* try unlinking empty */
if (errno != ENOENT) e(32);
if (link("foo", "") != -1) e(33); /* try linking to "" */
if (errno != ENOENT) e(34);
if (link("", "foo") != -1) e(35); /* try linking "" */
if (errno != ENOENT) e(36);
if (link("", "") != -1) e(37);/* try linking "" to "" */
if (errno != ENOENT) e(38);
if (link("/foo/bar/foo", "a") != -1) e(39); /* try no existing path */
if (errno != ENOENT) e(40);
if (link("foo", "/foo/bar/foo") != -1) e(41); /* try no existing path */
if (errno != ENOENT) e(42);
if (link("/a/b/c", "/d/e/f") != -1) e(43); /* try no existing path */
if (errno != ENOENT) e(44);
if (link("abc", "a") != -1) e(45); /* try no existing file */
if (errno != ENOENT) e(46);
if (link("foo/bar", "bar") != -1) e(47); /* foo is a file */
if (errno != ENOTDIR) e(48);
if (link("foo", "foo/bar") != -1) e(49); /* foo is not a dir */
if (errno != ENOTDIR) e(50);
if (unlink("foo/bar") != -1) e(51); /* foo still no dir */
if (errno != ENOTDIR) e(52);
if (!superuser) {
if (link(".", "root") != -1) e(55);
if (errno != EPERM) e(56); /* noroot can't */
if (unlink("root") != -1) e(57);
if (errno != ENOENT) e(58);
}
if (mkdir("dir", 0777) != 0) e(59);
if (superuser) {
if (rmdir("dir") != 0) e(63);
}
if (!superuser) {
if (unlink("dir") != -1) e(64);
if (errno != EPERM) e(65); /* that ain't w'rkn */
if (rmdir("dir") != 0) e(66); /* that's the way to do it */
}
}
int stateq(stp1, stp2)
struct stat *stp1, *stp2;
{
if (stp1->st_dev != stp2->st_dev) return 0;
if (stp1->st_ino != stp2->st_ino) return 0;
if (stp1->st_mode != stp2->st_mode) return 0;
if (stp1->st_nlink != stp2->st_nlink) return 0;
if (stp1->st_uid != stp2->st_uid) return 0;
if (stp1->st_gid != stp2->st_gid) return 0;
if (stp1->st_rdev != stp2->st_rdev) return 0;
if (stp1->st_size != stp2->st_size) return 0;
if (stp1->st_atime != stp2->st_atime) return 0;
if (stp1->st_mtime != stp2->st_mtime) return 0;
if (stp1->st_ctime != stp2->st_ctime) return 0;
return 1;
}
void makelongnames()
{
register int i;
memset(MaxName, 'a', NAME_MAX);
MaxName[NAME_MAX] = '\0';
for (i = 0; i < PATH_MAX - 1; i++) { /* idem path */
MaxPath[i++] = '.';
MaxPath[i] = '/';
}
MaxPath[PATH_MAX - 1] = '\0';
strcpy(ToLongName, MaxName); /* copy them Max to ToLong */
strcpy(ToLongPath, MaxPath);
ToLongName[NAME_MAX] = 'a';
ToLongName[NAME_MAX + 1] = '\0'; /* extend ToLongName by one
* too many */
ToLongPath[PATH_MAX - 1] = '/';
ToLongPath[PATH_MAX] = '\0'; /* inc ToLongPath by one */
}
void e(n)
int n;
{
int err_num = errno; /* Save in case printf clobbers it. */
printf("Subtest %d, error %d errno=%d: ", subtest, n, errno);
errno = err_num;
perror("");
if (errct++ > MAX_ERROR) {
printf("Too many errors; test aborted\n");
chdir("..");
system("rm -rf DIR*");
exit(1);
}
errno = 0;
}
void quit()
{
chdir("..");
system("rm -rf DIR_26");
if (errct == 0) {
printf("ok\n");
exit(0);
} else {
printf("%d errors\n", errct);
exit(1);
}
}