test22.c

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/* test22: umask()              (p) Jan-Mark Wams. email: jms@cs.vu.nl */

#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <stdio.h>

#define MAX_ERROR 4             /* Stop after ``MAX_ERROR'' errors. */
#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)

int errct = 0;                  /* Total error counter. */
int subtest = 1;

_PROTOTYPE(void main, (int argc, char *argv[]));
_PROTOTYPE(void test22a, (void));
_PROTOTYPE(int mode, (char *filename));
_PROTOTYPE(int umode, (char *filename));
_PROTOTYPE(void e, (int number));
_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 22 ");
  fflush(stdout);
  system("chmod 777 DIR_22/* DIR_22/*/* > /dev/null 2>&1");
  System("rm -rf DIR_22; mkdir DIR_22");
  Chdir("DIR_22");

  for (i = 0; i < ITERATIONS; i++) {
        if (m & 0001) test22a();
  }

  quit();
}

void test22a()
{
  int fd1, fd2;
  int i, oldmask;
  int stat_loc;                 /* For the wait sys call. */

  subtest = 1;

  system("chmod 777 ../DIR_22/* ../DIR_22/*/* > /dev/null 2>&1");
  System("rm -rf ../DIR_22/*");

  oldmask = 0123;               /* Set oldmask and umask. */
  umask(oldmask);               /* Set oldmask and umask. */

  /* Check all the possible values of umask. */
  for (i = 0000; i <= 0777; i++) {
        if (oldmask != umask(i)) e(1);  /* set umask() */
        fd1 = open("open", O_CREAT, 0777);
        if (fd1 != 3) e(2);     /* test open(), */
        fd2 = creat("creat", 0777);
        if (fd2 != 4) e(3);     /* creat(), */
        if (mkdir("dir", 0777) != 0) e(4);      /* mkdir(), */
        if (mkfifo("fifo", 0777) != 0) e(5);    /* and mkfifo(). */

        if (umode("open") != i) e(6);   /* see if they have */
        if (umode("creat") != i) e(7);  /* the proper mode */
        if (umode("dir") != i) e(8);
        if (umode("fifo") != i) e(9);

        /* Clean up */
        if (close(fd1) != 0) e(10);
        if (close(fd2) != 0) e(11);     /* close fd's and */
        unlink("open");         /* clean the dir */
        unlink("creat");
        rmdir("dir");
        unlink("fifo");
        oldmask = i;            /* save current mask */
  }

  /* Check-reset mask */
  if (umask(0124) != 0777) e(12);

  /* Check if a umask of 0000 leaves the modes alone. */
  if (umask(0000) != 0124) e(13);
  for (i = 0000; i <= 0777; i++) {
        fd1 = open("open", O_CREAT, i);
        if (fd1 != 3) e(14);    /* test open(), */
        fd2 = creat("creat", i);
        if (fd2 != 4) e(15);    /* creat(), */
        if (mkdir("dir", i) != 0) e(16);        /* mkdir(), */
        if (mkfifo("fifo", i) != 0) e(17);      /* and mkfifo(). */

        if (mode("open") != i) e(18);   /* see if they have */
        if (mode("creat") != i) e(19);  /* the proper mode */
        if (mode("dir") != i) e(20);
        if (mode("fifo") != i) e(21);

        /* Clean up */
        if (close(fd1) != 0) e(22);
        if (close(fd2) != 0) e(23);
        if (unlink("open") != 0) e(24);
        unlink("creat");
        rmdir("dir");
        unlink("fifo");
  }

  /* Check if umask survives a fork() */
  if (umask(0124) != 0000) e(25);
  switch (fork()) {
      case -1:  fprintf(stderr, "Can't fork\n");        break;
      case 0:
        mkdir("bar", 0777);     /* child makes a dir */
        exit(0);
      default:
        if (wait(&stat_loc) == -1) e(26);
  }
  if (umode("bar") != 0124) e(27);
  rmdir("bar");

  /* Check if umask in child changes umask in parent. */
  switch (fork()) {
      case -1:  fprintf(stderr, "Can't fork\n");        break;
      case 0:
        switch (fork()) {
            case -1:
                fprintf(stderr, "Can't fork\n");
                break;
            case 0:
                if (umask(0432) != 0124) e(28);
                exit(0);
            default:
                if (wait(&stat_loc) == -1) e(29);
        }
        if (umask(0423) != 0124) e(30);
        exit(0);
      default:
        if (wait(&stat_loc) == -1) e(31);
  }
  if (umask(0342) != 0124) e(32);

  /* See if extra bits are ignored */
  if (umask(0xFFFF) != 0342) e(33);
  if (umask(0xFE00) != 0777) e(34);
  if (umask(01777) != 0000) e(35);
  if (umask(0022) != 0777) e(36);
}

int mode(arg)
char *arg;
{                               /* return the file mode. */
  struct stat st;
  Stat(arg, &st);
  return st.st_mode & 0777;
}

int umode(arg)
char *arg;
{                               /* return the umask used for this file */
  return 0777 ^ mode(arg);
}

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("chmod 777 ../DIR_22/* ../DIR_22/*/* > /dev/null 2>&1");
  System("rm -rf DIR_22");

  if (errct == 0) {
        printf("ok\n");
        exit(0);
  } else {
        printf("%d errors\n", errct);
        exit(1);
  }
}

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