test/select/test00.c

   1 /*
   2  * Test name: test00.c
   3  *
   4  * Objetive: The purpose of this test is to make sure that the bitmap
   5  * manipulation macros work without problems.
   6  *
   7  * Description: This tests first fills a fd_set bit by bit, and shows it, then
   8  * it clears the fd_set bit by bit as well.
   9  *
  10  * Jose M. Gomez
  11  */
  12
  13 #include <sys/types.h>
  14 #include <fcntl.h>
  15 #include <unistd.h>
  16 #include <sys/select.h>
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <limits.h>
  20
  21 int main(int argc, char *argv[]) {
  22         fd_set fds;
  23         int i,j;
  24
  25         FD_ZERO(&fds);
  26         for (i=0;i<FD_SETSIZE;i++) {
  27                 /* see if SET works */
  28                 FD_SET(i, &fds);
  29                 if(!FD_ISSET(i, &fds))
  30                         return 1;
  31         }
  32         FD_ZERO(&fds);
  33         for (i=0;i<FD_SETSIZE;i++) {
  34                 /* see if ZERO works */
  35                 if(FD_ISSET(i, &fds))
  36                         return 1;
  37         }
  38         for (i=0;i<FD_SETSIZE;i++) {
  39                 FD_SET(i, &fds);
  40                 for(j = 0; j <= i; j++)
  41                         if(!FD_ISSET(j, &fds))
  42                                 return 1;
  43                 for(; j < FD_SETSIZE; j++)
  44                         if(FD_ISSET(j, &fds))
  45                                 return 1;
  46         }
  47         for (i=0;i<FD_SETSIZE;i++) {
  48                 FD_CLR(i, &fds);
  49                 for(j = 0; j <= i; j++)
  50                         if(FD_ISSET(j, &fds))
  51                                 return 1;
  52                 for(; j < FD_SETSIZE; j++)
  53                         if(!FD_ISSET(j, &fds))
  54                                 return 1;
  55         }
  56         printf("ok\n");
  57         return 0;
  58 }