blob: 08a3d388a4c312fca18558b2b8e5dcf027c7afaf [file] [log] [blame]
#include "cache.h"
int copy_fd(int ifd, int ofd)
{
while (1) {
int len;
char buffer[8192];
char *buf = buffer;
len = xread(ifd, buffer, sizeof(buffer));
if (!len)
break;
if (len < 0) {
int read_error;
read_error = errno;
close(ifd);
return error("copy-fd: read returned %s",
strerror(read_error));
}
while (len) {
int written = xwrite(ofd, buf, len);
if (written > 0) {
buf += written;
len -= written;
}
else if (!written) {
close(ifd);
return error("copy-fd: write returned 0");
} else {
close(ifd);
return error("copy-fd: write returned %s",
strerror(errno));
}
}
}
close(ifd);
return 0;
}