children/read-all-files.c

   1 /*
   2  * Simple child to iterate over the entire fd list, opening/reading/closing as we go.
   3  */
   4
   5 #include <errno.h>
   6 #include <fcntl.h>
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <sys/types.h>
  10 #include <sys/stat.h>
  11 #include <string.h>
  12 #include <unistd.h>
  13 #include "arch.h"       // page_size
  14 #include "child.h"
  15 #include "files.h"
  16 #include "log.h"
  17 #include "random.h"
  18 #include "trinity.h"    // __unused__
  19
  20 int child_read_all_files(__unused__ int childno)
  21 {
  22         struct stat sb;
  23         char *buffer;
  24         unsigned int i;
  25         int fd;
  26
  27         for (i = 0; i < files_in_index; i++) {
  28                 int ret;
  29                 const char *filename;
  30
  31                 filename = fileindex[i];
  32
  33                 ret = (lstat(filename, &sb));
  34                 if (ret == -1)
  35                         continue;
  36
  37                 if (sb.st_size == 0)
  38                         sb.st_size = page_size;
  39
  40                 buffer = malloc(sb.st_size);
  41                 if (!buffer)
  42                         continue;
  43
  44                 memset(buffer, 0, sb.st_size);
  45
  46                 fd = open(filename, O_RDONLY | O_NONBLOCK);
  47                 if (!fd) {
  48                         free(buffer);
  49                         continue;
  50                 }
  51
  52                 ret = read(fd, buffer, sb.st_size);
  53 //              if (ret != -1)
  54 //                      output(0, "%s:%s\n", filename, buffer);
  55
  56                 if (rand_bool())
  57                         sleep(1);
  58
  59                 free(buffer);
  60
  61                 close(fd);
  62         }
  63         return 0;
  64 }