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minix/test/test25.c
Thomas Veerman ca9280e097 - Fix dangling symlink regression 
- Make open(2) more POSIX compliant
- Add a test case for dangling symlinks and open() syscall with O_CREAT and
  O_EXCL on a symlink.
- Update open(2) man page to reflect change.
2010-01-21 09:32:15 +00:00

740 lines
24 KiB
C
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/* test25: open (), close () (p) Jan-Mark Wams. email: jms@cs.vu.nl */
/* Not tested: O_NONBLOCK on special files, supporting it.
** On a read-only file system, some error reports are to be expected.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <limits.h>
#include <errno.h>
#include <time.h>
#include <stdio.h>
#define MAX_ERROR 4
#define ITERATIONS 2
#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)
#define Creat(f) if (close(creat(f,0777))!=0) printf("Can't creat %s\n",f)
#define Report(s,n) printf("Subtest %d" s,subtest,(n))
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 */
_PROTOTYPE(void main, (int argc, char *argv[]));
_PROTOTYPE(void test25a, (void));
_PROTOTYPE(void test25b, (void));
_PROTOTYPE(void test25c, (void));
_PROTOTYPE(void test25d, (void));
_PROTOTYPE(void test25e, (void));
_PROTOTYPE(void makelongnames, (void));
_PROTOTYPE(void e, (int number));
_PROTOTYPE(void quit, (void));
void main(argc, argv)
int argc;
char *argv[];
{
char buffer[PATH_MAX + 1];
int i, m = 0xFFFF;
sync();
if (geteuid() == 0 || getuid() == 0) {
realpath(argv[0], buffer);
execl("/usr/bin/su", "/usr/bin/su", "-", "ast", "-c", buffer, NULL);
printf("Test 25 cannot run as root; test aborted\n");
exit(1);
}
if (argc == 2) m = atoi(argv[1]);
printf("Test 25 ");
fflush(stdout);
System("rm -rf DIR_25; mkdir DIR_25");
Chdir("DIR_25");
makelongnames();
superuser = (geteuid() == 0);
/* Close all files, the parent might have opened. */
for (i = 3; i < 100; i++) close(i);
for (i = 0; i < ITERATIONS; i++) {
if (m & 001) test25a();
if (m & 002) test25b();
if (m & 004) test25c();
if (m & 010) test25d();
if (m & 020) test25e();
}
quit();
}
void test25a()
{ /* Test fcntl flags. */
subtest = 1;
#define EXCLUDE(a,b) (((a)^(b)) == ((a)|(b)))
#define ADDIT (O_APPEND | O_CREAT | O_EXCL | O_NONBLOCK | O_TRUNC)
/* If this compiles all flags are defined but they have to be or-able. */
if (!(EXCLUDE(O_NONBLOCK, O_TRUNC))) e(1);
if (!(EXCLUDE(O_EXCL, O_NONBLOCK | O_TRUNC))) e(2);
if (!(EXCLUDE(O_CREAT, O_EXCL | O_NONBLOCK | O_TRUNC))) e(3);
if (!(EXCLUDE(O_APPEND, O_CREAT | O_EXCL | O_NONBLOCK | O_TRUNC))) e(4);
if (!(EXCLUDE(O_RDONLY, ADDIT))) e(5);
if (!(EXCLUDE(O_WRONLY, ADDIT))) e(6);
if (!(EXCLUDE(O_RDWR, ADDIT))) e(7);
}
void test25b()
{ /* Test normal operation. */
#define BUF_SIZE 1024
int fd1, fd2, fd3, fd4, fd5;
char buf[BUF_SIZE];
struct stat st1, st2, st3;
time_t time1, time2;
int stat_loc;
subtest = 2;
System("rm -rf ../DIR_25/*");
System("echo Hello > he"); /* make test files */
System("echo Hello > ha"); /* size 6 bytes */
System("echo Hello > hi");
System("echo Hello > ho");
/* Check path resolution. Check if lowest fds are returned */
if ((fd1 = open("he", O_RDONLY)) != 3) e(1);
if (read(fd1, buf, BUF_SIZE) != 6) e(2);
if ((fd2 = open("./ha", O_RDONLY)) != 4) e(3);
if ((fd3 = open("../DIR_25/he", O_RDWR)) != 5) e(4);
if ((fd4 = open("ho", O_WRONLY)) != 6) e(5);
if (close(fd4) != 0) e(6);
if (close(fd1) != 0) e(7);
if ((fd1 = open("./././ho", O_RDWR)) != 3) e(8);
if ((fd4 = open("../DIR_25/he", O_RDONLY)) != 6) e(9);
if (close(fd2) != 0) e(10);
if (close(fd3) != 0) e(11);
if ((fd2 = open("ha", O_RDONLY)) != 4) e(12);
if ((fd3 = open("/etc/passwd", O_RDONLY)) != 5) e(13);
if (close(fd4) != 0) e(14); /* close all */
if (close(fd1) != 0) e(15);
if (close(fd3) != 0) e(16);
/* Check if processes share fd2, and if they have independent new fds */
System("rm -rf /tmp/sema.25");
switch (fork()) {
case -1: printf("Can't fork\n"); break;
case 0:
if ((fd1 = open("he", O_WRONLY)) != 3) e(17);
if ((fd3 = open("../././DIR_25/ha", O_WRONLY)) != 5) e(18);
if ((fd4 = open("../DIR_25/hi", O_WRONLY)) != 6) e(19);
if ((fd5 = open("ho", O_WRONLY)) != 7) e(20);
system("while test ! -f /tmp/sema.25; do sleep 1; done"); /* parent */
if (read(fd2, buf, BUF_SIZE) != 3) e(21); /* gets Hel */
if (strncmp(buf, "lo\n", 3) != 0) e(22); /* we get lo */
if (close(fd1) != 0) e(23);
if (close(fd2) != 0) e(24);
if (close(fd3) != 0) e(25);
if (close(fd4) != 0) e(26);
if (close(fd5) != 0) e(27);
exit(0);
default:
if ((fd1 = open("ha", O_RDONLY)) != 3) e(28);
if ((fd3 = open("./he", O_RDONLY)) != 5) e(29);
if ((fd4 = open("../DIR_25/hi", O_RDWR)) != 6) e(30);
if ((fd5 = open("ho", O_WRONLY)) != 7) e(31);
if (close(fd1) != 0) e(32);
if (read(fd2, buf, 3) != 3) e(33); /* get Hel */
Creat("/tmp/sema.25");
if (strncmp(buf, "Hel", 3) != 0) e(34);
if (close(fd2) != 0) e(35);
if (close(fd3) != 0) e(36);
if (close(fd4) != 0) e(37);
if (close(fd5) != 0) e(38);
if (wait(&stat_loc) == -1) e(39);
if (stat_loc != 0) e(40);
}
System("rm -f /tmp/sema.25");
/* Check if the file status information is updated correctly */
Stat("hi", &st1); /* get info */
Stat("ha", &st2); /* of files */
time(&time1);
while (time1 >= time((time_t *)0))
; /* wait a sec */
if ((fd1 = open("hi", O_RDONLY)) != 3) e(41); /* open files */
if ((fd2 = open("ha", O_WRONLY)) != 4) e(42);
if (read(fd1, buf, 1) != 1) e(43); /* read one */
if (close(fd1) != 0) e(44); /* close one */
Stat("hi", &st3); /* get info */
if (st1.st_uid != st3.st_uid) e(45);
if (st1.st_gid != st3.st_gid) e(46); /* should be same */
if (st1.st_mode != st3.st_mode) e(47);
if (st1.st_size != st3.st_size) e(48);
if (st1.st_nlink != st3.st_nlink) e(49);
if (st1.st_mtime != st3.st_mtime) e(50);
if (st1.st_ctime != st3.st_ctime) e(51);
#ifndef V1_FILESYSTEM
if (st1.st_atime >= st3.st_atime) e(52); /* except for atime. */
#endif
if (write(fd2, "Howdy\n", 6) != 6) e(53); /* Update c & mtime. */
if ((fd1 = open("ha", O_RDWR)) != 3) e(54);
if (read(fd1, buf, 6) != 6) e(55); /* Update atime. */
if (strncmp(buf, "Howdy\n", 6) != 0) e(56);
if (close(fd1) != 0) e(57);
Stat("ha", &st3);
if (st2.st_uid != st3.st_uid) e(58);
if (st2.st_gid != st3.st_gid) e(59); /* should be same */
if (st2.st_mode != st3.st_mode) e(60);
if (st2.st_nlink != st3.st_nlink) e(61);
if (st2.st_ctime >= st3.st_ctime) e(62);
#ifndef V1_FILESYSTEM
if (st2.st_atime >= st3.st_atime) e(63);
#endif
if (st2.st_mtime >= st3.st_mtime) e(64);
if (st2.st_size != st3.st_size) e(65);
if (close(fd2) != 0) e(66);
/* Let's see if RDONLY files are read only. */
if ((fd1 = open("hi", O_RDONLY)) != 3) e(67);
if (write(fd1, " again", 7) != -1) e(68); /* we can't write */
if (errno != EBADF) e(69); /* a read only fd */
if (read(fd1, buf, 7) != 6) e(70); /* but we can read */
if (close(fd1) != 0) e(71);
/* Let's see if WRONLY files are write only. */
if ((fd1 = open("hi", O_WRONLY)) != 3) e(72);
if (read(fd1, buf, 7) != -1) e(73); /* we can't read */
if (errno != EBADF) e(74); /* a write only fd */
if (write(fd1, "hELLO", 6) != 6) e(75); /* but we can write */
if (close(fd1) != 0) e(76);
/* Let's see if files are closable only once. */
if (close(fd1) != -1) e(77);
if (errno != EBADF) e(78);
/* Let's see how calling close() with bad fds is handled. */
if (close(10) != -1) e(79);
if (errno != EBADF) e(80);
if (close(111) != -1) e(81);
if (errno != EBADF) e(82);
if (close(-432) != -1) e(83);
if (errno != EBADF) e(84);
/* Let's see if RDWR files are read & write able. */
if ((fd1 = open("hi", O_RDWR)) != 3) e(85);
if (read(fd1, buf, 6) != 6) e(86); /* we can read */
if (strncmp(buf, "hELLO", 6) != 0) e(87); /* and we can write */
if (write(fd1, "Hello", 6) != 6) e(88); /* a read write fd */
if (close(fd1) != 0) e(89);
/* Check if APPENDed files are realy appended */
if ((fd1 = open("hi", O_RDWR | O_APPEND)) != 3) e(90); /* open hi */
/* An open should set the file offset to 0. */
if (lseek(fd1, (off_t) 0, SEEK_CUR) != 0) e(91);
/* Writing 0 bytes should not have an effect. */
if (write(fd1, "", 0) != 0) e(92);
if (lseek(fd1, (off_t) 0, SEEK_CUR) != 0) e(93); /* the end? */
/* A seek befor a wirte should not matter with O_APPEND. */
Stat("hi", &st1);
if (lseek(fd1, (off_t) - 3, SEEK_END) != st1.st_size - 3) e(94);
/* By writing 1 byte, we force the offset to the end of the file */
if (write(fd1, "1", 1) != 1) e(95);
Stat("hi", &st1);
if (lseek(fd1, (off_t) 0, SEEK_CUR) != st1.st_size) e(96);
if (write(fd1, "2", 1) != 1) e(97);
Stat("hi", &st1);
if (lseek(fd1, (off_t) 0, SEEK_CUR) != st1.st_size) e(98);
if (write(fd1, "3", 1) != 1) e(99);
Stat("hi", &st1);
if (lseek(fd1, (off_t) 0, SEEK_CUR) != st1.st_size) e(100);
if (lseek(fd1, (off_t) - 2, SEEK_CUR) <= 0) e(101);
if (write(fd1, "4", 1) != 1) e(102);
/* Since the mode was O_APPEND, the offset should be reset to EOF */
Stat("hi", &st1);
if (lseek(fd1, (off_t) 0, SEEK_CUR) != st1.st_size) e(103);
if (lseek(fd1, (off_t) - 4, SEEK_CUR) != st1.st_size - 4) e(104);
if (read(fd1, buf, BUF_SIZE) != 4) e(105);
if (strncmp(buf, "1234", 4) != 0) e(106);
if (close(fd1) != 0) e(107);
/* Check the effect of O_CREAT */
Stat("ho", &st1);
fd1 = open("ho", O_RDWR | O_CREAT, 0000);
if (fd1 != 3) e(108);
Stat("ho", &st2);
if (memcmp(&st1, &st2, sizeof(struct stat)) != 0) e(109);
if (read(fd1, buf, 6) != 6) e(110);
if (strncmp(buf, "Hello\n", 6) != 0) e(111);
if (write(fd1, "@", 1) != 1) e(112);
if (close(fd1) != 0) e(113);
(void) umask(0000);
fd1 = open("ho", O_RDWR | O_CREAT | O_EXCL, 0777);
if (fd1 != -1) e(114); /* ho exists */
System("rm -rf new");
time(&time1);
while (time1 >= time((time_t *)0))
;
fd1 = open("new", O_RDWR | O_CREAT, 0716);
if (fd1 != 3) e(115); /* new file */
Stat("new", &st1);
time(&time2);
while (time2 >= time((time_t *)0))
;
time(&time2);
if (st1.st_uid != geteuid()) e(116); /* try this as superuser. */
if (st1.st_gid != getegid()) e(117);
if ((st1.st_mode & 0777) != 0716) e(118);
if (st1.st_nlink != 1) e(119);
if (st1.st_mtime <= time1) e(120);
if (st1.st_mtime >= time2) e(121);
#ifndef V1_FILESYSTEM
if (st1.st_atime != st1.st_mtime) e(122);
#endif
if (st1.st_ctime != st1.st_mtime) e(123);
if (st1.st_size != 0) e(124);
if (write(fd1, "I'm new in town", 16) != 16) e(125);
if (lseek(fd1, (off_t) - 5, SEEK_CUR) != 11) e(126);
if (read(fd1, buf, 5) != 5) e(127);
if (strncmp(buf, "town", 5) != 0) e(128);
if (close(fd1) != 0) e(129);
/* Let's test the O_TRUNC flag on this new file. */
time(&time1);
while (time1 >= time((time_t *)0));
if ((fd1 = open("new", O_RDWR | O_TRUNC)) != 3) e(130);
Stat("new", &st1);
time(&time2);
while (time2 >= time((time_t *)0));
time(&time2);
if ((st1.st_mode & 0777) != 0716) e(131);
if (st1.st_size != (size_t) 0) e(132); /* TRUNCed ? */
if (st1.st_mtime <= time1) e(133);
if (st1.st_mtime >= time2) e(134);
if (st1.st_ctime != st1.st_mtime) e(135);
if (close(fd1) != 0) e(136);
/* Test if file permission bits and the file ownership are unchanged. */
/* So we will see if `O_CREAT' has no effect if the file exists. */
if (superuser) {
System("echo > bar; chmod 077 bar"); /* Make bar 077 */
System("chown daemon bar");
System("chgrp daemon bar"); /* Daemon's bar */
fd1 = open("bar", O_RDWR | O_CREAT | O_TRUNC, 0777); /* knock knock */
if (fd1 == -1) e(137);
if (write(fd1, "foo", 3) != 3) e(138); /* rewrite bar */
if (close(fd1) != 0) e(139);
Stat("bar", &st1);
if (st1.st_uid != 1) e(140); /* bar is still */
if (st1.st_gid != 1) e(141); /* owned by daemon */
if ((st1.st_mode & 0777) != 077) e(142); /* mode still is 077 */
if (st1.st_size != (size_t) 3) e(143); /* 3 bytes long */
/* We do the whole thing again, but with O_WRONLY */
fd1 = open("bar", O_WRONLY | O_CREAT | O_TRUNC, 0777);
if (fd1 == -1) e(144);
if (write(fd1, "foobar", 6) != 6) e(145); /* rewrite bar */
if (close(fd1) != 0) e(146);
Stat("bar", &st1);
if (st1.st_uid != 1) e(147); /* bar is still */
if (st1.st_gid != 1) e(148); /* owned by daemon */
if ((st1.st_mode & 0777) != 077) e(149); /* mode still is 077 */
if (st1.st_size != (size_t) 6) e(150); /* 6 bytes long */
}
}
void test25c()
{ /* Test normal operation Part two. */
int fd1, fd2;
char buf[BUF_SIZE];
struct stat st;
int stat_loc;
static int iteration=0;
subtest = 3;
iteration++;
System("rm -rf ../DIR_25/*");
/* Fifo file test here. */
if (mkfifo("fifo", 0777) != 0) e(1);
switch (fork()) {
case -1: printf("Can't fork\n"); break;
case 0:
alarm(20); /* Give child 20 seconds to live. */
if ((fd1 = open("fifo", O_RDONLY)) != 3) e(2);
if (read(fd1, buf, BUF_SIZE) != 23) e(3);
if (strncmp(buf, "1 2 3 testing testing\n", 23) != 0) e(4);
if (close(fd1) != 0) e(5);
exit(0);
default:
if ((fd1 = open("fifo", O_WRONLY)) != 3) e(6);
if (write(fd1, "1 2 3 testing testing\n", 23) != 23) e(7);
if (close(fd1) != 0) e(8);
if (wait(&stat_loc) == -1) e(9);
if (stat_loc != 0) e(10); /* The alarm went off? */
}
/* Try opening for writing with O_NONBLOCK. */
fd1 = open("fifo", O_WRONLY | O_NONBLOCK);
if (fd1 != -1) e(11);
if (errno != ENXIO) e(12);
close(fd1);
/* Try opening for writing with O_NONBLOCK and O_CREAT. */
fd1 = open("fifo", O_WRONLY | O_CREAT | O_NONBLOCK, 0777);
if (fd1 != -1) e(13);
if (errno != ENXIO) e(14);
close(fd1);
/* Both the NONBLOCK and the EXCLusive give raise to error. */
fd1 = open("fifo", O_WRONLY | O_CREAT | O_EXCL | O_NONBLOCK, 0777);
if (fd1 != -1) e(15);
if (errno != EEXIST && errno != ENXIO) e(16);
close(fd1); /* Just in case. */
/* Try opening for reading with O_NONBLOCK. */
fd1 = open("fifo", O_RDONLY | O_NONBLOCK);
if (fd1 != 3) e(17);
if (close(fd1) != 0) e(18);
/* Nopt runs out of memory. ;-< We just cut out some valid code */
/* FIFO's should always append. (They have no file position.) */
switch (fork()) {
case -1: printf("Can't fork\n"); break;
case 0:
alarm(20); /* Give child 20 seconds to live. */
if ((fd1 = open("fifo", O_WRONLY)) != 3) e(19);
if ((fd2 = open("fifo", O_WRONLY)) != 4) e(20);
if (write(fd1, "I did see Elvis.\n", 18) != 18) e(21);
if (write(fd2, "I DID.\n", 8) != 8) e(22);
if (close(fd2) != 0) e(23);
if (close(fd1) != 0) e(24);
exit(0);
default:
if ((fd1 = open("fifo", O_RDONLY)) != 3) e(25);
if (read(fd1, buf, 18) != 18) e(26);
if (strncmp(buf, "I did see Elvis.\n", 18) != 0) e(27);
if (read(fd1, buf, BUF_SIZE) != 8) e(28);
if (strncmp(buf, "I DID.\n", 8) != 0) e(29);
if (close(fd1) != 0) e(30);
if (wait(&stat_loc) == -1) e(31);
if (stat_loc != 0) e(32); /* The alarm went off? */
}
/* O_TRUNC should have no effect on FIFO files. */
switch (fork()) {
case -1: printf("Can't fork\n"); break;
case 0:
alarm(20); /* Give child 20 seconds to live. */
if ((fd1 = open("fifo", O_WRONLY)) != 3) e(33);
if (write(fd1, "I did see Elvis.\n", 18) != 18) e(34);
if ((fd2 = open("fifo", O_WRONLY | O_TRUNC)) != 4) e(35);
if (write(fd2, "I DID.\n", 8) != 8) e(36);
if (close(fd2) != 0) e(37);
if (close(fd1) != 0) e(38);
exit(0);
default:
if ((fd1 = open("fifo", O_RDONLY)) != 3) e(39);
if (read(fd1, buf, 18) != 18) e(40);
if (strncmp(buf, "I did see Elvis.\n", 18) != 0) e(41);
if (read(fd1, buf, BUF_SIZE) != 8) e(42);
if (strncmp(buf, "I DID.\n", 8) != 0) e(43);
if (close(fd1) != 0) e(44);
if (wait(&stat_loc) == -1) e(45);
if (stat_loc != 0) e(46); /* The alarm went off? */
}
/* Closing the last fd should flush all data to the bitbucket. */
System("rm -rf /tmp/sema.25");
switch (fork()) {
case -1: printf("Can't fork\n"); break;
case 0:
alarm(20); /* Give child 20 seconds to live. */
if ((fd1 = open("fifo", O_WRONLY)) != 3) e(47);
if (write(fd1, "I did see Elvis.\n", 18) != 18) e(48);
Creat("/tmp/sema.25");
sleep(2); /* give parent a chance to open */
/* this was sleep(1), but that's too short: child also sleeps(1) */
if (close(fd1) != 0) e(49);
exit(0);
default:
if ((fd1 = open("fifo", O_RDONLY)) != 3) e(50);
/* Make `sure' write has closed. */
while (stat("/tmp/sema.25", &st) != 0) sleep(1);
if (close(fd1) != 0) e(51);
if ((fd1 = open("fifo", O_RDONLY | O_NONBLOCK)) != 3) e(52);
if (read(fd1, buf, BUF_SIZE) != 18) e(53);
if (close(fd1) != 0) e(54);
if (wait(&stat_loc) == -1) e(55);
if (stat_loc != 0) e(56); /* The alarm went off? */
}
/* Let's try one too many. */
System("rm -rf /tmp/sema.25");
switch (fork()) {
case -1: printf("Can't fork\n"); break;
case 0:
alarm(20); /* Give child 20 seconds to live. */
if ((fd1 = open("fifo", O_WRONLY)) != 3) e(57);
if (write(fd1, "I did see Elvis.\n", 18) != 18) e(58);
/* Keep open till third reader is opened. */
while (stat("/tmp/sema.25", &st) != 0) sleep(1);
if (close(fd1) != 0) e(59);
exit(0);
default:
if ((fd1 = open("fifo", O_RDONLY)) != 3) e(60);
if (read(fd1, buf, 2) != 2) e(61);
if (strncmp(buf, "I ", 2) != 0) e(62);
if (close(fd1) != 0) e(63);
if ((fd1 = open("fifo", O_RDONLY)) != 3) e(64);
if (read(fd1, buf, 4) != 4) e(65);
if (strncmp(buf, "did ", 4) != 0) e(66);
if ((fd2 = open("fifo", O_RDONLY)) != 4) e(67);
/* Signal third reader is open. */
Creat("/tmp/sema.25");
if (read(fd2, buf, BUF_SIZE) != 12) e(68);
if (strncmp(buf, "see Elvis.\n", 12) != 0) e(69);
if (close(fd2) != 0) e(70);
if (close(fd1) != 0) e(71);
if (wait(&stat_loc) == -1) e(72);
if (stat_loc != 0) e(73); /* The alarm went off? */
}
System("rm -rf fifo /tmp/sema.25");
/* O_TRUNC should have no effect on directroys. */
System("mkdir dir; touch dir/f1 dir/f2 dir/f3");
if ((fd1 = open("dir", O_WRONLY | O_TRUNC)) != -1) e(74);
if (errno != EISDIR) e(75);
close(fd1);
/* Opening a directory for reading should be possible. */
if ((fd1 = open("dir", O_RDONLY)) != 3) e(76);
if (close(fd1) != 0) e(77);
if (unlink("dir/f1") != 0) e(78); /* Should still be there. */
if (unlink("dir/f2") != 0) e(79);
if (unlink("dir/f3") != 0) e(80);
if (rmdir("dir") != 0) e(81);
if (!superuser) {
/* Test if O_CREAT is not usable to open files with the wrong mode */
(void) umask(0200); /* nono has no */
System("touch nono"); /* write bit */
(void) umask(0000);
fd1 = open("nono", O_RDWR | O_CREAT, 0777); /* try to open */
if (fd1 != -1) e(82);
if (errno != EACCES) e(83); /* but no access */
}
}
void test25d()
{
int fd;
subtest = 4;
System("rm -rf ../DIR_25/*");
/* Test maximal file name length. */
if ((fd = open(MaxName, O_RDWR | O_CREAT, 0777)) != 3) e(1);
if (close(fd) != 0) e(2);
MaxPath[strlen(MaxPath) - 2] = '/';
MaxPath[strlen(MaxPath) - 1] = 'a'; /* make ././.../a */
if ((fd = open(MaxPath, O_RDWR | O_CREAT, 0777)) != 3) e(3);
if (close(fd) != 0) e(4);
MaxPath[strlen(MaxPath) - 1] = '/'; /* make ././.../a */
}
void test25e()
{
int fd;
char *noread = "noread"; /* Name for unreadable file. */
char *nowrite = "nowrite"; /* Same for unwritable. */
int stat_loc;
subtest = 5;
System("rm -rf ../DIR_25/*");
mkdir("bar", 0777); /* make bar */
/* Check if no access on part of path generates the correct error. */
System("chmod 677 bar"); /* rw-rwxrwx */
if (open("bar/nono", O_RDWR | O_CREAT, 0666) != -1) e(1);
if (errno != EACCES) e(2);
/* Ditto for no write permission. */
System("chmod 577 bar"); /* r-xrwxrwx */
if (open("bar/nono", O_RDWR | O_CREAT, 0666) != -1) e(3);
if (errno != EACCES) e(4);
/* Clean up bar. */
System("rm -rf bar");
/* Improper flags set on existing file. */
System("touch noread; chmod 377 noread"); /* noread */
if (open(noread, O_RDONLY) != -1) e(5);
if (open(noread, O_RDWR) != -1) e(6);
if (open(noread, O_RDWR | O_CREAT, 0777) != -1) e(7);
if (open(noread, O_RDWR | O_CREAT | O_TRUNC, 0777) != -1) e(8);
if ((fd = open(noread, O_WRONLY)) != 3) e(9);
if (close(fd) != 0) e(10);
System("touch nowrite; chmod 577 nowrite"); /* nowrite */
if (open(nowrite, O_WRONLY) != -1) e(11);
if (open(nowrite, O_RDWR) != -1) e(12);
if (open(nowrite, O_RDWR | O_CREAT, 0777) != -1) e(13);
if (open(nowrite, O_RDWR | O_CREAT | O_TRUNC, 0777) != -1) e(14);
if ((fd = open(nowrite, O_RDONLY)) != 3) e(15);
if (close(fd) != 0) e(16);
if (superuser) {
/* If we can make a file ownd by some one else, test access again. */
System("chmod 733 noread");
System("chown bin noread");
System("chgrp system noread");
System("chmod 755 nowrite");
System("chown bin nowrite");
System("chgrp system nowrite");
switch (fork()) {
case -1: printf("Can't fork\n"); break;
case 0:
setuid(1);
setgid(1); /* become daemon */
if (open(noread, O_RDONLY) != -1) e(17);
if (open(noread, O_RDWR) != -1) e(18);
if (open(noread, O_RDWR | O_CREAT, 0777) != -1) e(19);
fd = open(noread, O_RDWR | O_CREAT | O_TRUNC, 0777);
if (fd != -1) e(20);
if ((fd = open(noread, O_WRONLY)) != 3) e(21);
if (close(fd) != 0) e(22);
if (open(nowrite, O_WRONLY) != -1) e(23);
if (open(nowrite, O_RDWR) != -1) e(24);
if (open(nowrite, O_RDWR | O_CREAT, 0777) != -1) e(25);
fd = open(nowrite, O_RDWR | O_CREAT | O_TRUNC, 0777);
if (fd != -1) e(26);
if ((fd = open(nowrite, O_RDONLY)) != 3) e(27);
if (close(fd) != 0) e(28);
exit(0);
default:
if (wait(&stat_loc) == -1) e(29);
}
}
/* Clean up the noread and nowrite files. */
System("rm -rf noread nowrite");
/* Test the O_EXCL flag. */
System("echo > exists");
if (open("exists", O_RDWR | O_CREAT | O_EXCL, 0777) != -1) e(30);
if (errno != EEXIST) e(31);
if (open("exists", O_RDONLY | O_CREAT | O_EXCL, 0777) != -1) e(32);
if (errno != EEXIST) e(33);
if (open("exists", O_WRONLY | O_CREAT | O_EXCL, 0777) != -1) e(34);
if (errno != EEXIST) e(35);
fd = open("exists", O_RDWR | O_CREAT | O_EXCL | O_TRUNC, 0777);
if (fd != -1) e(36);
if (errno != EEXIST) e(37);
fd = open("exists", O_RDONLY | O_CREAT | O_EXCL | O_TRUNC, 0777);
if (fd != -1) e(38);
if (errno != EEXIST) e(39);
fd = open("exists", O_WRONLY | O_CREAT | O_EXCL | O_TRUNC, 0777);
if (fd != -1) e(40);
if (errno != EEXIST) e(41);
/* open should fail when O_CREAT|O_EXCL are set and a symbolic link names
a file with EEXIST (regardless of link actually works or not) */
if (symlink("exists", "slinktoexists") == -1) e(42);
if (open("slinktoexists", O_RDWR | O_CREAT | O_EXCL, 0777) != -1) e(43);
if (unlink("exists") == -1) e(44);
/* "slinktoexists has become a dangling symlink. open(2) should still fail
with EEXIST */
if (open("slinktoexists", O_RDWR | O_CREAT | O_EXCL, 0777) != -1) e(45);
if (errno != EEXIST) e(46);
/* Test ToLongName and ToLongPath */
if ((fd = open(ToLongName, O_RDWR | O_CREAT, 0777)) != 3) e(47);
if (close(fd) != 0) e(48);
ToLongPath[PATH_MAX - 2] = '/';
ToLongPath[PATH_MAX - 1] = 'a';
if ((fd = open(ToLongPath, O_RDWR | O_CREAT, 0777)) != -1) e(49);
if (errno != ENAMETOOLONG) e(50);
if (close(fd) != -1) e(51);
ToLongPath[PATH_MAX - 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_25");
if (errct == 0) {
printf("ok\n");
exit(0);
} else {
printf("%d errors\n", errct);
exit(1);
}
}
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