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