tee: fix bug: argv[-1] is a no-no!

bb_full_fd_action: optimize
die_if_ferror: "<applet>: filename" isn't a good err msg, add "..I/O error"

1 files changed, 2 insertions, 2 deletions

diff --git a/libbb/xfuncs.c b/libbb/xfuncs.c
index 1dbd7521b..773e718b8 100644
--- a/libbb/xfuncs.c
+++ b/libbb/xfuncs.c
@@ -124,7 +124,7 @@ int ndelay_on(int fd)
 }
 
 // Die with an error message if we can't write the entire buffer.
-void xwrite(int fd, void *buf, size_t count)
+void xwrite(int fd, const void *buf, size_t count)
 {
         if (count) {
                 ssize_t size = full_write(fd, buf, count);
@@ -146,7 +146,7 @@ off_t xlseek(int fd, off_t offset, int whence)
 void die_if_ferror(FILE *fp, const char *fn)
 {
         if (ferror(fp)) {
-                bb_error_msg_and_die("%s", fn);
+                bb_error_msg_and_die("%s: I/O error", fn);
         }
 }