listati/splicecp.c

   1 #define _GNU_SOURCE
   2 #include <fcntl.h>       /* file control functions */
   3 ...
   4
   5 int main(int argc, char *argv[])
   6 {
   7     int size = 4096;
   8     int pipefd[2];
   9     int in_fd, out_fd;
  10     int nread, nwrite;
  11     ...
  12     /* copy loop */
  13     while (1) {
  14         nread = splice(in_fd, NULL, pipefd[1], NULL, size,
  15                        SPLICE_F_MOVE|SPLICE_F_MORE);
  16         if (nread == 0) break;
  17         if (nread < 0) {
  18             if (errno == EINTR) {
  19                 continue;
  20             } else {
  21                 perror("read error");
  22                 exit(EXIT_FAILURE);
  23             }
  24         }
  25         while (nread > 0) {
  26             nwrite = splice(pipefd[0], NULL, out_fd, NULL, nread,
  27                             SPLICE_F_MOVE|SPLICE_F_MORE);
  28             if (nwrite < 0) {
  29                 if (errno == EINTR)
  30                     continue;
  31                 else {
  32                     perror("write error");
  33                     exit(EXIT_FAILURE);
  34                 }
  35             }
  36             nread -= nwrite;
  37         }
  38     }
  39     return EXIT_SUCCESS;
  40 }