more grind
This commit is contained in:
Robert Morris
Frans Kaashoek
parent
897f6f34dd
commit
b62d4d412b
2 changed files with 145 additions and 18 deletions
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@ -11,12 +11,12 @@ cat(int fd)
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while((n = read(fd, buf, sizeof(buf))) > 0) {
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if (write(1, buf, n) != n) {
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printf("cat: write error\n");
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fprintf(2, "cat: write error\n");
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exit(1);
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}
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}
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if(n < 0){
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printf("cat: read error\n");
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fprintf(2, "cat: read error\n");
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exit(1);
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}
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}
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@ -28,12 +28,12 @@ main(int argc, char *argv[])
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if(argc <= 1){
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cat(0);
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exit(1);
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exit(0);
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}
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for(i = 1; i < argc; i++){
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if((fd = open(argv[i], 0)) < 0){
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printf("cat: cannot open %s\n", argv[i]);
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fprintf(2, "cat: cannot open %s\n", argv[i]);
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exit(1);
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}
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cat(fd);
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155
user/grind.c
155
user/grind.c
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@ -54,44 +54,56 @@ go(int which_child)
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static char buf[999];
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char *break0 = sbrk(0);
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uint64 iters = 0;
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mkdir("grindir");
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if(chdir("grindir") != 0){
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printf("chdir grindir failed\n");
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exit(1);
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}
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chdir("/");
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while(1){
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iters++;
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if((iters % 500) == 0)
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write(1, which_child?"B":"A", 1);
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int what = rand() % 20;
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int what = rand() % 23;
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if(what == 1){
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close(open("a", O_CREATE|O_RDWR));
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close(open("grindir/../a", O_CREATE|O_RDWR));
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} else if(what == 2){
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close(open("b", O_CREATE|O_RDWR));
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close(open("grindir/../grindir/../b", O_CREATE|O_RDWR));
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} else if(what == 3){
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unlink("a");
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unlink("grindir/../a");
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} else if(what == 4){
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unlink("b");
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if(chdir("grindir") != 0){
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printf("chdir grindir failed\n");
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exit(1);
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}
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unlink("../b");
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chdir("/");
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} else if(what == 5){
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close(fd);
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fd = open("a", O_CREATE|O_RDWR);
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fd = open("/grindir/../a", O_CREATE|O_RDWR);
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} else if(what == 6){
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close(fd);
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fd = open("b", O_CREATE|O_RDWR);
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fd = open("/./grindir/./../b", O_CREATE|O_RDWR);
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} else if(what == 7){
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write(fd, buf, sizeof(buf));
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} else if(what == 8){
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read(fd, buf, sizeof(buf));
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} else if(what == 9){
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mkdir("a");
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close(open("a/a", O_CREATE|O_RDWR));
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mkdir("grindir/../a");
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close(open("a/../a/./a", O_CREATE|O_RDWR));
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unlink("a/a");
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} else if(what == 10){
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mkdir("b");
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close(open("b/b", O_CREATE|O_RDWR));
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mkdir("/../b");
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close(open("grindir/../b/b", O_CREATE|O_RDWR));
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unlink("b/b");
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} else if(what == 11){
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unlink("b");
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link("a", "b");
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link("../grindir/./../a", "../b");
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} else if(what == 12){
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unlink("a");
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link("b", "a");
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unlink("../grindir/../a");
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link(".././b", "/grindir/../a");
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} else if(what == 13){
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int pid = fork();
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if(pid == 0){
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@ -126,6 +138,10 @@ go(int which_child)
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printf("grind: fork failed\n");
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exit(1);
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}
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if(chdir("../grindir/..") != 0){
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printf("chdir failed\n");
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exit(1);
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}
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kill(pid);
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wait(0);
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} else if(what == 18){
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@ -161,6 +177,117 @@ go(int which_child)
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close(fds[0]);
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close(fds[1]);
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wait(0);
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} else if(what == 20){
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int pid = fork();
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if(pid == 0){
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unlink("a");
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mkdir("a");
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chdir("a");
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unlink("../a");
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fd = open("x", O_CREATE|O_RDWR);
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unlink("x");
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exit(0);
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} else if(pid < 0){
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printf("fork failed\n");
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exit(1);
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}
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wait(0);
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} else if(what == 21){
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unlink("c");
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// should always succeed. check that there are free i-nodes,
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// file descriptors, blocks.
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int fd1 = open("c", O_CREATE|O_RDWR);
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if(fd1 < 0){
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printf("create c failed\n");
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exit(1);
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}
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if(write(fd1, "x", 1) != 1){
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printf("write c failed\n");
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exit(1);
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}
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struct stat st;
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if(fstat(fd1, &st) != 0){
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printf("fstat failed\n");
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exit(1);
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}
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if(st.size != 1){
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printf("fstat reports wrong size %d\n", (int)st.size);
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exit(1);
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}
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if(st.ino > 50){
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printf("fstat reports crazy i-number %d\n", st.ino);
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exit(1);
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}
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close(fd1);
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unlink("c");
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} else if(what == 22){
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// echo hi | cat
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int aa[2], bb[2];
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if(pipe(aa) < 0){
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fprintf(2, "pipe failed\n");
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exit(1);
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}
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if(pipe(bb) < 0){
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fprintf(2, "pipe failed\n");
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exit(1);
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}
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int pid1 = fork();
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if(pid1 == 0){
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close(bb[0]);
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close(bb[1]);
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close(aa[0]);
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close(1);
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if(dup(aa[1]) != 1){
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fprintf(2, "dup failed\n");
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exit(1);
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}
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close(aa[1]);
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char *args[3] = { "echo", "hi", 0 };
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exec("grindir/../echo", args);
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fprintf(2, "echo: not found\n");
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exit(2);
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} else if(pid1 < 0){
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fprintf(2, "fork failed\n");
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exit(3);
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}
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int pid2 = fork();
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if(pid2 == 0){
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close(aa[1]);
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close(bb[0]);
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close(0);
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if(dup(aa[0]) != 0){
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fprintf(2, "dup failed\n");
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exit(4);
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}
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close(aa[0]);
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close(1);
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if(dup(bb[1]) != 1){
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fprintf(2, "dup failed\n");
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exit(5);
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}
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close(bb[1]);
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char *args[2] = { "cat", 0 };
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exec("/cat", args);
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fprintf(2, "cat: not found\n");
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exit(6);
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} else if(pid2 < 0){
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fprintf(2, "fork failed\n");
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exit(7);
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}
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close(aa[0]);
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close(aa[1]);
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close(bb[1]);
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char buf[3] = { 0, 0, 0 };
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read(bb[0], buf+0, 1);
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read(bb[0], buf+1, 1);
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close(bb[0]);
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int st1, st2;
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wait(&st1);
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wait(&st2);
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if(st1 != 0 || st2 != 0 || strcmp(buf, "hi") != 0){
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printf("exec pipeline failed %d %d \"%s\"\n", st1, st2, buf);
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exit(1);
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}
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}
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}
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}
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