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
  25   for (i = 1, j = 0; i < argc; i++) {
  26     if (j >= MAXFD) { fprintf(stderr, "too many\n"); exit(1); }
  27     if (sscanf(argv[i], "%d:%d", &fds[j].cur, &fds[j].want) < 2 ||
  28         fds[j].cur >= MAXFD)
  29       { fprintf(stderr, "bad syntax\n"); exit(1); }
  30     j++;
  31   }
  32   n = j;
  33   for (i = 0; i < MAXFD; i++) flag[i] = -1;
  34   for (i = 0; i < n; i++) {
  35     fd = fds[i].cur;
  36     if (flag[fd] >= 0)
  37       ino[i] = ino[flag[fd]];
  38     else {
  39       flag[fd] = i;
  40       if ((fd2 = open(",delete-me",
  41                       O_WRONLY | O_CREAT | O_EXCL,
  42                       0700)) < 0)
  43         fail("creat");
  44       unlink(",delete-me");
  45       if (fd2 != fd) { if (dup2(fd2, fd) < 0) fail("dup2"); close(fd2); }
  46       if (fstat(fd, &st)) fail("fstat");
  47       ino[i] = st.st_ino;
  48     }
  49   }
  50
  51   if (mdup(fds, n)) fail("mdup");
  52
  53   for (i = 0; i < n; i++) {
  54     fd = fds[i].cur;
  55     if (fds[i].want != -1 && fds[i].want != fd) {
  56       printf("fd %d[%d] != %d\n", fd, i, fds[i].want);
  57       win = 0;
  58     } else if (fstat(fd, &st)) {
  59       printf("fstat %d[%d] failed: %s\n", fd, i, strerror(errno));
  60       win = 0;
  61     } else if (st.st_ino != ino[i]) {
  62       printf("ino %d[%d] wrong\n", fd, i);
  63       win = 0;
  64     }
  65   }
  66
  67   return (!win);
  68 }