Avoid side effects in putc(), which may be implemented as a macro

Signed-off-by: Dan Fandrich <dan@coneharvesters.com>
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/coreutils/tee.c b/coreutils/tee.c
index 8db9042aa..2e1e367f2 100644
--- a/coreutils/tee.c
+++ b/coreutils/tee.c
@@ -70,8 +70,8 @@ int tee_main(int argc, char **argv)
         while ((c = safe_read(STDIN_FILENO, buf, sizeof(buf))) > 0) {
                 fp = files;
                 do
-                        fwrite(buf, 1, c, *fp++);
-                while (*fp);
+                        fwrite(buf, 1, c, *fp);
+                while (*++fp);
         }
         if (c < 0) {            /* Make sure read errors are signaled. */
                 retval = EXIT_FAILURE;
@@ -81,8 +81,8 @@ int tee_main(int argc, char **argv)
         while ((c = getchar()) != EOF) {
                 fp = files;
                 do
-                        putc(c, *fp++);
-                while (*fp);
+                        putc(c, *fp);
+                while (*++fp);
         }
 #endif