Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2
   3int copy_fd(int ifd, int ofd)
   4{
   5        while (1) {
   6                int len;
   7                char buffer[8192];
   8                char *buf = buffer;
   9                len = read(ifd, buffer, sizeof(buffer));
  10                if (!len)
  11                        break;
  12                if (len < 0) {
  13                        if (errno == EAGAIN)
  14                                continue;
  15                        return error("copy-fd: read returned %s",
  16                                     strerror(errno));
  17                }
  18                while (1) {
  19                        int written = write(ofd, buf, len);
  20                        if (written > 0) {
  21                                buf += written;
  22                                len -= written;
  23                                if (!len)
  24                                        break;
  25                        }
  26                        if (!written)
  27                                return error("copy-fd: write returned 0");
  28                        if (errno == EAGAIN || errno == EINTR)
  29                                continue;
  30                        return error("copy-fd: write returned %s",
  31                                     strerror(errno));
  32                }
  33        }
  34        close(ifd);
  35        return 0;
  36}
  37