#include "libbb.h"
-extern size_t copyfd(int fd1, int fd2)
+extern int copyfd(int fd1, int fd2)
{
- char buf[32768], *writebuf;
- int status = TRUE;
- size_t totalread = 0, bytesread, byteswritten;
+ char buf[8192];
+ ssize_t nread, nwrote;
- while(status) {
- bytesread = read(fd1, &buf, sizeof(buf));
- if(bytesread == -1) {
- error_msg("read: %s", strerror(errno));
- status = FALSE;
+ while (1) {
+ nread = safe_read(fd1, buf, sizeof(buf));
+ if (nread == 0)
break;
+ if (nread == -1) {
+ perror_msg("read");
+ return -1;
}
- byteswritten = 0;
- writebuf = buf;
- while(bytesread) {
- byteswritten = write( fd2, &writebuf, bytesread );
- if(byteswritten == -1) {
- error_msg("write: %s", strerror(errno));
- status = FALSE;
- break;
- }
- bytesread -= byteswritten;
- writebuf += byteswritten;
+
+ nwrote = full_write(fd2, buf, nread);
+ if (nwrote == -1) {
+ perror_msg("write");
+ return -1;
}
}
- if ( status == TRUE )
- return totalread;
- else
- return -1;
+
+ return 0;
}
/* END CODE */