minix/tests/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 int max_error =         4;
  16 #include "common.h"
  17
  18 #define ITERATIONS     10
  19
  20
  21 #define System(cmd)     if (system(cmd) != 0) printf("``%s'' failed\n", cmd)
  22 #define Chdir(dir)      if (chdir(dir) != 0) printf("Can't goto %s\n", dir)
  23 #define Stat(a,b)       if (stat(a,b) != 0) printf("Can't stat %s\n", a)
  24
  25 int superuser;
  26 char *MaxName;                  /* Name of maximum length */
  27 char MaxPath[PATH_MAX];         /* Same for path */
  28 char *ToLongName;               /* Name of maximum +1 length */
  29 char ToLongPath[PATH_MAX + 1];  /* Same for path, both too long */
  30
  31 void test31a(void);
  32 void test31b(void);
  33 void test31c(void);
  34 void makelongnames(void);
  35
  36 int main(int argc, char *argv[])
  37 {
  38   int i, m = 0xFFFF;
  39
  40   sync();
  41   if (argc == 2) m = atoi(argv[1]);
  42   umask(0000);
  43   start(31);
  44   makelongnames();
  45   superuser = (geteuid() == 0);
  46
  47
  48   for (i = 0; i < ITERATIONS; i++) {
  49         if (m & 0001) test31a();
  50         if (m & 0002) test31b();
  51         if (m & 0004) test31c();
  52   }
  53   quit();
  54   return 1;
  55 }
  56
  57 void test31a()
  58 {                               /* Test normal operation. */
  59
  60 #define BUF_SIZE 1024
  61
  62   int fd;
  63   char buf[BUF_SIZE];
  64   struct stat st, dirst;
  65   time_t time1, time2;
  66   int stat_loc, cnt;
  67
  68   subtest = 1;
  69
  70   System("rm -rf ../DIR_31/*");
  71
  72   /* Check if the file status information is updated correctly */
  73   cnt = 0;
  74   Stat(".", &dirst);
  75   time(&time1);
  76   while (time1 == time((time_t *)0))
  77         ;
  78
  79   do {
  80         unlink("fifo");
  81         time(&time1);
  82         if (mkfifo("fifo", 0644) != 0) e(1);
  83         Stat("fifo", &st);
  84         time(&time2);
  85   } while (time1 != time2 && cnt++ < 100);
  86
  87   if (cnt >= 100) e(2);
  88   if (st.st_uid != geteuid()) e(3);     /* Uid should be set. */
  89 #if defined(NGROUPS_MAX) && NGROUPS_MAX == 0
  90   if (st.st_gid != getegid()) e(4);
  91 #endif /* defined(NGROUPS_MAX) && NGROUPS_MAX == 0 */
  92   if (!S_ISFIFO(st.st_mode)) e(5);
  93   if ((st.st_mode & 0777) != 0644) e(6);
  94   if (st.st_nlink != 1) e(7);
  95   if (st.st_ctime != time1) e(8);
  96   if (st.st_atime != time1) e(9);
  97   if (st.st_mtime != time1) e(10);
  98   if (st.st_size != 0) e(11);   /* File should be empty. */
  99
 100   /* Check if status for "." is updated. */
 101   Stat(".", &st);
 102   if (st.st_ctime <= dirst.st_ctime) e(12);
 103   if (st.st_mtime <= dirst.st_mtime) e(13);
 104
 105   /* Basic checking if a fifo file created with mkfifo() is a pipe. */
 106   alarm(10);            /* in case fifo hangs */
 107   switch (fork()) {
 108       case -1:  printf("Can't fork\n"); break;
 109       case 0:
 110         if ((fd = open("fifo", O_RDONLY)) != 3) e(14);
 111         if (read(fd, buf, BUF_SIZE) != 7) e(15);
 112         if (strcmp(buf, "banana") != 0) e(16);
 113         if (close(fd) != 0) e(17);
 114         if ((fd = open("fifo", O_WRONLY)) != 3) e(18);
 115         if (write(fd, "thanks", 7) != 7) e(19);
 116         if (close(fd) != 0) e(20);
 117         exit(0);
 118
 119       default:
 120         if ((fd = open("fifo", O_WRONLY)) != 3) e(21);
 121         if (write(fd, "banana", 7) != 7) e(22);
 122         if (close(fd) != 0) e(23);
 123         if ((fd = open("fifo", O_RDONLY)) != 3) e(24);
 124         if (read(fd, buf, BUF_SIZE) != 7) e(25);
 125         if (strcmp(buf, "thanks") != 0) e(26);
 126         if (close(fd) != 0) e(27);
 127         wait(&stat_loc);
 128         if (stat_loc != 0) e(28);       /* Alarm? */
 129   }
 130   alarm(0);
 131 }
 132
 133 void test31b()
 134 {
 135   subtest = 2;
 136
 137   System("rm -rf ../DIR_31/*");
 138
 139   /* Test maximal file name length. */
 140   if (mkfifo(MaxName, 0777) != 0) e(1);
 141   if (unlink(MaxName) != 0) e(2);
 142   MaxPath[strlen(MaxPath) - 2] = '/';
 143   MaxPath[strlen(MaxPath) - 1] = 'a';   /* make ././.../a */
 144   if (mkfifo(MaxPath, 0777) != 0) e(3);
 145   if (unlink(MaxPath) != 0) e(4);
 146   MaxPath[strlen(MaxPath) - 1] = '/';   /* make ././.../a */
 147 }
 148
 149 void test31c()
 150 {
 151   int does_truncate;
 152   subtest = 3;
 153
 154   System("rm -rf ../DIR_31/*");
 155
 156   /* Check if mkfifo() removes, files, fifos, dirs. */
 157   if (mkfifo("fifo", 0777) != 0) e(1);
 158   System("mkdir dir; > file");
 159   if (mkfifo("fifo", 0777) != -1) e(2);
 160   if (errno != EEXIST) e(3);
 161   if (mkfifo("dir", 0777) != -1) e(4);
 162   if (errno != EEXIST) e(5);
 163   if (mkfifo("file", 0777) != -1) e(6);
 164   if (errno != EEXIST) e(7);
 165
 166   /* Test empty path. */
 167   if (mkfifo("", 0777) != -1) e(8);
 168   if (errno != ENOENT) e(9);
 169   if (mkfifo("/tmp/noway/out", 0777) != -1) e(10);
 170   if (errno != ENOENT) e(11);
 171
 172   /* Test if path prefix is a directory. */
 173   if (mkfifo("/etc/passwd/nono", 0777) != -1) e(12);
 174   if (errno != ENOTDIR) e(13);
 175
 176   mkdir("bar", 0777);           /* make bar */
 177
 178   /* Check if no access on part of path generates the correct error. */
 179   System("chmod 577 bar");      /* r-xrwxrwx */
 180   if (!superuser) {
 181         if (mkfifo("bar/nono", 0666) != -1) e(14);
 182         if (errno != EACCES) e(15);
 183   }
 184   if (superuser) {
 185         if (mkfifo("bar/nono", 0666) != 0) e(14);
 186         if (unlink("bar/nono") != 0) e(666);
 187   }
 188   System("chmod 677 bar");      /* rw-rwxrwx */
 189   if (!superuser) {
 190         if (mkfifo("bar/../nono", 0666) != -1) e(16);
 191         if (errno != EACCES) e(17);
 192   }
 193   if (unlink("nono") != -1) e(18);
 194
 195   /* Clean up bar. */
 196   System("rm -rf bar");
 197
 198   /* Test ToLongName and ToLongPath */
 199   does_truncate = does_fs_truncate();
 200   if (does_truncate) {
 201         if (mkfifo(ToLongName, 0777) != 0) e(19);
 202   } else {
 203         if (mkfifo(ToLongName, 0777) != -1) e(20);
 204         if (errno != ENAMETOOLONG) e(21);
 205   }
 206
 207   ToLongPath[PATH_MAX - 2] = '/';
 208   ToLongPath[PATH_MAX - 1] = 'a';
 209   if (mkfifo(ToLongPath, 0777) != -1) e(22);
 210   if (errno != ENAMETOOLONG) e(23);
 211   ToLongPath[PATH_MAX - 1] = '/';
 212 }
 213
 214 void makelongnames()
 215 {
 216   register int i;
 217   int max_name_length;
 218
 219   max_name_length = name_max("."); /* Aka NAME_MAX, but not every FS supports
 220                                     * the same length, hence runtime check */
 221   MaxName = malloc(max_name_length + 1);
 222   ToLongName = malloc(max_name_length + 1 + 1); /* Name of maximum +1 length */
 223   memset(MaxName, 'a', max_name_length);
 224   MaxName[max_name_length] = '\0';
 225
 226   for (i = 0; i < PATH_MAX - 1; i++) {  /* idem path */
 227         MaxPath[i++] = '.';
 228         MaxPath[i] = '/';
 229   }
 230   MaxPath[PATH_MAX - 1] = '\0';
 231
 232   strcpy(ToLongName, MaxName);  /* copy them Max to ToLong */
 233   strcpy(ToLongPath, MaxPath);
 234
 235   ToLongName[max_name_length] = 'a';
 236   ToLongName[max_name_length+1] = '\0';/* extend ToLongName by one too many */
 237   ToLongPath[PATH_MAX - 1] = '/';
 238   ToLongPath[PATH_MAX] = '\0';  /* inc ToLongPath by one */
 239 }