more grind

This commit is contained in:
Robert Morris 2019-11-07 09:46:20 -05:00 committed by Frans Kaashoek
parent 897f6f34dd
commit b62d4d412b
2 changed files with 145 additions and 18 deletions

View file

@ -11,12 +11,12 @@ cat(int fd)
while((n = read(fd, buf, sizeof(buf))) > 0) {
if (write(1, buf, n) != n) {
printf("cat: write error\n");
fprintf(2, "cat: write error\n");
exit(1);
}
}
if(n < 0){
printf("cat: read error\n");
fprintf(2, "cat: read error\n");
exit(1);
}
}
@ -28,12 +28,12 @@ main(int argc, char *argv[])
if(argc <= 1){
cat(0);
exit(1);
exit(0);
}
for(i = 1; i < argc; i++){
if((fd = open(argv[i], 0)) < 0){
printf("cat: cannot open %s\n", argv[i]);
fprintf(2, "cat: cannot open %s\n", argv[i]);
exit(1);
}
cat(fd);

View file

@ -55,43 +55,55 @@ go(int which_child)
char *break0 = sbrk(0);
uint64 iters = 0;
mkdir("grindir");
if(chdir("grindir") != 0){
printf("chdir grindir failed\n");
exit(1);
}
chdir("/");
while(1){
iters++;
if((iters % 500) == 0)
write(1, which_child?"B":"A", 1);
int what = rand() % 20;
int what = rand() % 23;
if(what == 1){
close(open("a", O_CREATE|O_RDWR));
close(open("grindir/../a", O_CREATE|O_RDWR));
} else if(what == 2){
close(open("b", O_CREATE|O_RDWR));
close(open("grindir/../grindir/../b", O_CREATE|O_RDWR));
} else if(what == 3){
unlink("a");
unlink("grindir/../a");
} else if(what == 4){
unlink("b");
if(chdir("grindir") != 0){
printf("chdir grindir failed\n");
exit(1);
}
unlink("../b");
chdir("/");
} else if(what == 5){
close(fd);
fd = open("a", O_CREATE|O_RDWR);
fd = open("/grindir/../a", O_CREATE|O_RDWR);
} else if(what == 6){
close(fd);
fd = open("b", O_CREATE|O_RDWR);
fd = open("/./grindir/./../b", O_CREATE|O_RDWR);
} else if(what == 7){
write(fd, buf, sizeof(buf));
} else if(what == 8){
read(fd, buf, sizeof(buf));
} else if(what == 9){
mkdir("a");
close(open("a/a", O_CREATE|O_RDWR));
mkdir("grindir/../a");
close(open("a/../a/./a", O_CREATE|O_RDWR));
unlink("a/a");
} else if(what == 10){
mkdir("b");
close(open("b/b", O_CREATE|O_RDWR));
mkdir("/../b");
close(open("grindir/../b/b", O_CREATE|O_RDWR));
unlink("b/b");
} else if(what == 11){
unlink("b");
link("a", "b");
link("../grindir/./../a", "../b");
} else if(what == 12){
unlink("a");
link("b", "a");
unlink("../grindir/../a");
link(".././b", "/grindir/../a");
} else if(what == 13){
int pid = fork();
if(pid == 0){
@ -126,6 +138,10 @@ go(int which_child)
printf("grind: fork failed\n");
exit(1);
}
if(chdir("../grindir/..") != 0){
printf("chdir failed\n");
exit(1);
}
kill(pid);
wait(0);
} else if(what == 18){
@ -161,6 +177,117 @@ go(int which_child)
close(fds[0]);
close(fds[1]);
wait(0);
} else if(what == 20){
int pid = fork();
if(pid == 0){
unlink("a");
mkdir("a");
chdir("a");
unlink("../a");
fd = open("x", O_CREATE|O_RDWR);
unlink("x");
exit(0);
} else if(pid < 0){
printf("fork failed\n");
exit(1);
}
wait(0);
} else if(what == 21){
unlink("c");
// should always succeed. check that there are free i-nodes,
// file descriptors, blocks.
int fd1 = open("c", O_CREATE|O_RDWR);
if(fd1 < 0){
printf("create c failed\n");
exit(1);
}
if(write(fd1, "x", 1) != 1){
printf("write c failed\n");
exit(1);
}
struct stat st;
if(fstat(fd1, &st) != 0){
printf("fstat failed\n");
exit(1);
}
if(st.size != 1){
printf("fstat reports wrong size %d\n", (int)st.size);
exit(1);
}
if(st.ino > 50){
printf("fstat reports crazy i-number %d\n", st.ino);
exit(1);
}
close(fd1);
unlink("c");
} else if(what == 22){
// echo hi | cat
int aa[2], bb[2];
if(pipe(aa) < 0){
fprintf(2, "pipe failed\n");
exit(1);
}
if(pipe(bb) < 0){
fprintf(2, "pipe failed\n");
exit(1);
}
int pid1 = fork();
if(pid1 == 0){
close(bb[0]);
close(bb[1]);
close(aa[0]);
close(1);
if(dup(aa[1]) != 1){
fprintf(2, "dup failed\n");
exit(1);
}
close(aa[1]);
char *args[3] = { "echo", "hi", 0 };
exec("grindir/../echo", args);
fprintf(2, "echo: not found\n");
exit(2);
} else if(pid1 < 0){
fprintf(2, "fork failed\n");
exit(3);
}
int pid2 = fork();
if(pid2 == 0){
close(aa[1]);
close(bb[0]);
close(0);
if(dup(aa[0]) != 0){
fprintf(2, "dup failed\n");
exit(4);
}
close(aa[0]);
close(1);
if(dup(bb[1]) != 1){
fprintf(2, "dup failed\n");
exit(5);
}
close(bb[1]);
char *args[2] = { "cat", 0 };
exec("/cat", args);
fprintf(2, "cat: not found\n");
exit(6);
} else if(pid2 < 0){
fprintf(2, "fork failed\n");
exit(7);
}
close(aa[0]);
close(aa[1]);
close(bb[1]);
char buf[3] = { 0, 0, 0 };
read(bb[0], buf+0, 1);
read(bb[0], buf+1, 1);
close(bb[0]);
int st1, st2;
wait(&st1);
wait(&st2);
if(st1 != 0 || st2 != 0 || strcmp(buf, "hi") != 0){
printf("exec pipeline failed %d %d \"%s\"\n", st1, st2, buf);
exit(1);
}
}
}
}