test/sockext/checkfd/checkfd.c

   1 #include <errno.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <unistd.h>
   5
   6 int
   7 main(int argc, char *argv[])
   8 {
   9         int i;
  10
  11         if (argc < 2)
  12                 exit(1);
  13
  14         for (i = 1; i < argc; ++i) {
  15                 char *endptr;
  16                 int fd;
  17
  18                 fd = strtol(argv[i], &endptr, 10);
  19                 if (*endptr != '\0')
  20                         exit(1);
  21
  22                 if (close(fd) < 0) {
  23                         int error = errno;
  24
  25                         if (error != EBADF) {
  26                                 fprintf(stderr, "close error %d\n", error);
  27                                 exit(2);
  28                         }
  29                 } else {
  30                         fprintf(stderr, "%d is still valid\n", fd);
  31                         exit(2);
  32                 }
  33         }
  34         exit(0);
  35 }