lib/ccan/read_write_all/read_write_all.c

   1 /* Licensed under LGPLv2+ - see LICENSE file for details */
   2 #include "read_write_all.h"
   3 #include <unistd.h>
   4 #include <errno.h>
   5
   6 bool write_all(int fd, const void *data, size_t size)
   7 {
   8         while (size) {
   9                 ssize_t done;
  10
  11                 done = write(fd, data, size);
  12                 if (done < 0 && errno == EINTR)
  13                         continue;
  14                 if (done <= 0)
  15                         return false;
  16                 data = (const char *)data + done;
  17                 size -= done;
  18         }
  19
  20         return true;
  21 }
  22
  23 bool read_all(int fd, void *data, size_t size)
  24 {
  25         while (size) {
  26                 ssize_t done;
  27
  28                 done = read(fd, data, size);
  29                 if (done < 0 && errno == EINTR)
  30                         continue;
  31                 if (done <= 0)
  32                         return false;
  33                 data = (char *)data + done;
  34                 size -= done;
  35         }
  36
  37         return true;
  38 }