lib/copy_file.c

   1 #include <common.h>
   2 #include <fs.h>
   3 #include <fcntl.h>
   4 #include <errno.h>
   5 #include <malloc.h>
   6 #define RW_BUF_SIZE     (ulong)4096
   7
   8 /**
   9  * @param[in] src FIXME
  10  * @param[out] dst FIXME
  11  */
  12 int copy_file(const char *src, const char *dst)
  13 {
  14         char *rw_buf = NULL;
  15         int srcfd = 0, dstfd = 0;
  16         int r, w;
  17         int ret = 1;
  18
  19         rw_buf = xmalloc(RW_BUF_SIZE);
  20
  21         srcfd = open(src, O_RDONLY);
  22         if (srcfd < 0) {
  23                 printf("could not open %s: %s\n", src, errno_str());
  24                 goto out;
  25         }
  26
  27         dstfd = open(dst, O_WRONLY | O_CREAT);
  28         if (dstfd < 0) {
  29                 printf("could not open %s: %s\n", dst, errno_str());
  30                 goto out;
  31         }
  32
  33         while(1) {
  34                 r = read(srcfd, rw_buf, RW_BUF_SIZE);
  35                 if (r < 0) {
  36                         perror("read");
  37                         goto out;
  38                 }
  39                 if (!r)
  40                         break;
  41                 w = write(dstfd, rw_buf, r);
  42                 if (w < 0) {
  43                         perror("write");
  44                         goto out;
  45                 }
  46         }
  47
  48         ret = 0;
  49 out:
  50         free(rw_buf);
  51         if (srcfd > 0)
  52                 close(srcfd);
  53         if (dstfd > 0)
  54                 close(dstfd);
  55
  56         return ret;
  57 }
  58