test/test31.c

   1 /* test31: mkfifo()             Author: Jan-Mark Wams (jms@cs.vu.nl) */
   2
   3 #include <sys/types.h>
   4 #include <sys/stat.h>
   5 #include <sys/wait.h>
   6 #include <stdlib.h>
   7 #include <unistd.h>
   8 #include <string.h>
   9 #include <fcntl.h>
  10 #include <limits.h>
  11 #include <errno.h>
  12 #include <time.h>
  13 #include <stdio.h>
  14
  15 #define MAX_ERROR       4
  16 #define ITERATIONS     10
  17
  18 #include "common.c"
  19
  20 #define System(cmd)     if (system(cmd) != 0) printf("``%s'' failed\n", cmd)
  21 #define Chdir(dir)      if (chdir(dir) != 0) printf("Can't goto %s\n", dir)
  22 #define Stat(a,b)       if (stat(a,b) != 0) printf("Can't stat %s\n", a)
  23
  24 int superuser;
  25 char *MaxName;                  /* Name of maximum length */
  26 char MaxPath[PATH_MAX];         /* Same for path */
  27 char *ToLongName;               /* Name of maximum +1 length */
  28 char ToLongPath[PATH_MAX + 1];  /* Same for path, both too long */
  29
  30 void test31a(void);
  31 void test31b(void);
  32 void test31c(void);
  33 void makelongnames(void);
  34
  35 int main(int argc, char *argv[])
  36 {
  37   int i, m = 0xFFFF;
  38
  39   sync();
  40   if (argc == 2) m = atoi(argv[1]);
  41   umask(0000);
  42   start(31);
  43   makelongnames();
  44   superuser = (geteuid() == 0);
  45
  46
  47   for (i = 0; i < ITERATIONS; i++) {
  48         if (m & 0001) test31a();
  49         if (m & 0002) test31b();
  50         if (m & 0004) test31c();
  51   }
  52   quit();
  53   return 1;
  54 }
  55
  56 void test31a()
  57 {                               /* Test normal operation. */
  58
  59 #define BUF_SIZE 1024
  60
  61   int fd;
  62   char buf[BUF_SIZE];
  63   struct stat st, dirst;
  64   time_t time1, time2;
  65   int stat_loc, cnt;
  66
  67   subtest = 1;
  68
  69   System("rm -rf ../DIR_31/*");
  70
  71   /* Check if the file status information is updated correctly */
  72   cnt = 0;
  73   Stat(".", &dirst);
  74   time(&time1);
  75   while (time1 == time((time_t *)0))
  76         ;
  77
  78   do {
  79         unlink("fifo");
  80         time(&time1);
  81         if (mkfifo("fifo", 0644) != 0) e(1);
  82         Stat("fifo", &st);
  83         time(&time2);
  84   } while (time1 != time2 && cnt++ < 100);
  85
  86   if (cnt >= 100) e(2);
  87   if (st.st_uid != geteuid()) e(3);     /* Uid should be set. */
  88 #if defined(NGROUPS_MAX) && NGROUPS_MAX == 0
  89   if (st.st_gid != getegid()) e(4);
  90 #endif /* defined(NGROUPS_MAX) && NGROUPS_MAX == 0 */
  91   if (!S_ISFIFO(st.st_mode)) e(5);
  92   if ((st.st_mode & 0777) != 0644) e(6);
  93   if (st.st_nlink != 1) e(7);
  94   if (st.st_ctime != time1) e(8);
  95   if (st.st_atime != time1) e(9);
  96   if (st.st_mtime != time1) e(10);
  97   if (st.st_size != 0) e(11);   /* File should be empty. */
  98
  99   /* Check if status for "." is updated. */
 100   Stat(".", &st);
 101   if (st.st_ctime <= dirst.st_ctime) e(12);
 102   if (st.st_mtime <= dirst.st_mtime) e(13);
 103
 104   /* Basic checking if a fifo file created with mkfifo() is a pipe. */
 105   alarm(10);            /* in case fifo hangs */
 106   switch (fork()) {
 107       case -1:  printf("Can't fork\n"); break;
 108       case 0:
 109         if ((fd = open("fifo", O_RDONLY)) != 3) e(14);
 110         if (read(fd, buf, BUF_SIZE) != 7) e(15);
 111         if (strcmp(buf, "banana") != 0) e(16);
 112         if (close(fd) != 0) e(17);
 113         if ((fd = open("fifo", O_WRONLY)) != 3) e(18);
 114         if (write(fd, "thanks", 7) != 7) e(19);
 115         if (close(fd) != 0) e(20);
 116         exit(0);
 117
 118       default:
 119         if ((fd = open("fifo", O_WRONLY)) != 3) e(21);
 120         if (write(fd, "banana", 7) != 7) e(22);
 121         if (close(fd) != 0) e(23);
 122         if ((fd = open("fifo", O_RDONLY)) != 3) e(24);
 123         if (read(fd, buf, BUF_SIZE) != 7) e(25);
 124         if (strcmp(buf, "thanks") != 0) e(26);
 125         if (close(fd) != 0) e(27);
 126         wait(&stat_loc);
 127         if (stat_loc != 0) e(28);       /* Alarm? */
 128   }
 129   alarm(0);
 130 }
 131
 132 void test31b()
 133 {
 134   subtest = 2;
 135
 136   System("rm -rf ../DIR_31/*");
 137
 138   /* Test maximal file name length. */
 139   if (mkfifo(MaxName, 0777) != 0) e(1);
 140   if (unlink(MaxName) != 0) e(2);
 141   MaxPath[strlen(MaxPath) - 2] = '/';
 142   MaxPath[strlen(MaxPath) - 1] = 'a';   /* make ././.../a */
 143   if (mkfifo(MaxPath, 0777) != 0) e(3);
 144   if (unlink(MaxPath) != 0) e(4);
 145   MaxPath[strlen(MaxPath) - 1] = '/';   /* make ././.../a */
 146 }
 147
 148 void test31c()
 149 {
 150   int does_truncate;
 151   subtest = 3;
 152
 153   System("rm -rf ../DIR_31/*");
 154
 155   /* Check if mkfifo() removes, files, fifos, dirs. */
 156   if (mkfifo("fifo", 0777) != 0) e(1);
 157   System("mkdir dir; > file");
 158   if (mkfifo("fifo", 0777) != -1) e(2);
 159   if (errno != EEXIST) e(3);
 160   if (mkfifo("dir", 0777) != -1) e(4);
 161   if (errno != EEXIST) e(5);
 162   if (mkfifo("file", 0777) != -1) e(6);
 163   if (errno != EEXIST) e(7);
 164
 165   /* Test empty path. */
 166   if (mkfifo("", 0777) != -1) e(8);
 167   if (errno != ENOENT) e(9);
 168   if (mkfifo("/tmp/noway/out", 0777) != -1) e(10);
 169   if (errno != ENOENT) e(11);
 170
 171   /* Test if path prefix is a directory. */
 172   if (mkfifo("/etc/passwd/nono", 0777) != -1) e(12);
 173   if (errno != ENOTDIR) e(13);
 174
 175   mkdir("bar", 0777);           /* make bar */
 176
 177   /* Check if no access on part of path generates the correct error. */
 178   System("chmod 577 bar");      /* r-xrwxrwx */
 179   if (!superuser) {
 180         if (mkfifo("bar/nono", 0666) != -1) e(14);
 181         if (errno != EACCES) e(15);
 182   }
 183   if (superuser) {
 184         if (mkfifo("bar/nono", 0666) != 0) e(14);
 185         if (unlink("bar/nono") != 0) e(666);
 186   }
 187   System("chmod 677 bar");      /* rw-rwxrwx */
 188   if (!superuser) {
 189         if (mkfifo("bar/../nono", 0666) != -1) e(16);
 190         if (errno != EACCES) e(17);
 191   }
 192   if (unlink("nono") != -1) e(18);
 193
 194   /* Clean up bar. */
 195   System("rm -rf bar");
 196
 197   /* Test ToLongName and ToLongPath */
 198   does_truncate = does_fs_truncate();
 199   if (does_truncate) {
 200         if (mkfifo(ToLongName, 0777) != 0) e(19);
 201   } else {
 202         if (mkfifo(ToLongName, 0777) != -1) e(20);
 203         if (errno != ENAMETOOLONG) e(21);
 204   }
 205
 206   ToLongPath[PATH_MAX - 2] = '/';
 207   ToLongPath[PATH_MAX - 1] = 'a';
 208   if (mkfifo(ToLongPath, 0777) != -1) e(22);
 209   if (errno != ENAMETOOLONG) e(23);
 210   ToLongPath[PATH_MAX - 1] = '/';
 211 }
 212
 213 void makelongnames()
 214 {
 215   register int i;
 216   int max_name_length;
 217
 218   max_name_length = name_max("."); /* Aka NAME_MAX, but not every FS supports
 219                                     * the same length, hence runtime check */
 220   MaxName = malloc(max_name_length + 1);
 221   ToLongName = malloc(max_name_length + 1 + 1); /* Name of maximum +1 length */
 222   memset(MaxName, 'a', max_name_length);
 223   MaxName[max_name_length] = '\0';
 224
 225   for (i = 0; i < PATH_MAX - 1; i++) {  /* idem path */
 226         MaxPath[i++] = '.';
 227         MaxPath[i] = '/';
 228   }
 229   MaxPath[PATH_MAX - 1] = '\0';
 230
 231   strcpy(ToLongName, MaxName);  /* copy them Max to ToLong */
 232   strcpy(ToLongPath, MaxPath);
 233
 234   ToLongName[max_name_length] = 'a';
 235   ToLongName[max_name_length+1] = '\0';/* extend ToLongName by one too many */
 236   ToLongPath[PATH_MAX - 1] = '/';
 237   ToLongPath[PATH_MAX] = '\0';  /* inc ToLongPath by one */
 238 }