mdw@git.distorted.org.uk Git - mLib/blob - sys/t/mdup-test.c

   1 #include <errno.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <unistd.h>
   6 #include <sys/types.h>
   7 #include <sys/stat.h>
   8 #include <fcntl.h>
   9 #include "mdup.h"
  10
  11 #define MAXFD 256
  12
  13 static void fail(const char *what) { perror(what); exit(1); }
  14
  15 int main(int argc, char *argv[])
  16 {
  17   int i, n, j;
  18   int fd, fd2;
  19   struct stat st;
  20   int ino[MAXFD];
  21   int flag[MAXFD];
  22   mdup_fd fds[MAXFD];
  23   int win = 1;
  24   int verbose = 0;
  25
  26   for (i = 1, j = 0; i < argc; i++) {
  27     if (strcmp(argv[i], "-v") == 0) { verbose++; continue; }
  28     if (j >= MAXFD) { fprintf(stderr, "too many\n"); exit(1); }
  29     if (sscanf(argv[i], "%d:%d", &fds[j].cur, &fds[j].want) < 2 ||
  30         fds[j].cur >= MAXFD)
  31       { fprintf(stderr, "bad syntax\n"); exit(1); }
  32     j++;
  33   }
  34   n = j;
  35   for (i = 0; i < MAXFD; i++) flag[i] = -1;
  36   for (i = 0; i < n; i++) {
  37     fd = fds[i].cur;
  38     if (flag[fd] >= 0) {
  39       ino[i] = ino[flag[fd]];
  40       if (verbose)
  41         printf("exist fd %d[%d] = ino %lu\n", fd, i, (unsigned long)ino[i]);
  42     } else {
  43       flag[fd] = i;
  44       if ((fd2 = open(",delete-me",
  45                       O_WRONLY | O_CREAT | O_EXCL,
  46                       0700)) < 0)
  47         fail("creat");
  48       unlink(",delete-me");
  49       if (fd2 != fd) { if (dup2(fd2, fd) < 0) fail("dup2"); close(fd2); }
  50       if (fstat(fd, &st)) fail("fstat");
  51       ino[i] = st.st_ino;
  52       if (verbose)
  53         printf("open fd %d[%d] = ino %lu\n", fd, i, (unsigned long)ino[i]);
  54     }
  55   }
  56
  57   if (mdup(fds, n)) fail("mdup");
  58
  59   for (i = 0; i < n; i++) {
  60     fd = fds[i].cur;
  61     if (fds[i].want != -1 && fds[i].want != fd) {
  62       printf("fd %d[%d] != %d\n", fd, i, fds[i].want);
  63       win = 0;
  64     } else if (fstat(fd, &st)) {
  65       printf("fstat %d[%d] failed: %s\n", fd, i, strerror(errno));
  66       win = 0;
  67     } else if (st.st_ino != ino[i]) {
  68       if (!verbose) printf("ino %d[%d] wrong\n", fd, i);
  69       else printf("ino %d[%d] = %lu != %lu\n", fd, i,
  70                   (unsigned long)(st.st_ino), (unsigned long)ino[i]);
  71       win = 0;
  72     }
  73   }
  74
  75   return (!win);
  76 }