kbuild: Fix missing '\n' for NEW symbols in yes "" | make oldconfig >conf.new

According to Documentation/kbuild/kconfig.txt, the commands:

    yes "" | make oldconfig >conf.new
    grep "(NEW)" conf.new

should list the new config symbols with their default values.
However, currently there is no line break after each new symbol.  When
kconfig is interactive the user will type a new-line at this point,
but when non-interactive kconfig must print it.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Reference: http://bugs.debian.org/636029
[regid23@nt1.in: Adjusted Ben's work to apply cleanly to this tree]
Reported-and-tested-by: Regid Ichira <regid23@nt1.in>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
index 4da3b4adfad233cb97728b0e0278f8143919cee3..e39fcd8143ea78b2c9c10a2983610fe75bbcb2e3 100644 (file)
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -36,6 +36,7 @@ enum input_mode {
 } input_mode = oldaskconfig;
 
 static int indent = 1;
+static int tty_stdio;
 static int valid_stdin = 1;
 static int sync_kconfig;
 static int conf_cnt;
@@ -108,6 +109,8 @@ static int conf_askvalue(struct symbol *sym, const char *def)
        case oldaskconfig:
                fflush(stdout);
                xfgets(line, 128, stdin);
+               if (!tty_stdio)
+                       printf("\n");
                return 1;
        default:
                break;
@@ -495,6 +498,8 @@ int main(int ac, char **av)
        bindtextdomain(PACKAGE, LOCALEDIR);
        textdomain(PACKAGE);
 
+       tty_stdio = isatty(0) && isatty(1) && isatty(2);
+
        while ((opt = getopt_long(ac, av, "", long_opts, NULL)) != -1) {
                input_mode = (enum input_mode)opt;
                switch (opt) {
@@ -621,7 +626,7 @@ int main(int ac, char **av)
                                return 1;
                        }
                }
-               valid_stdin = isatty(0) && isatty(1) && isatty(2);
+               valid_stdin = tty_stdio;
        }
 
        switch (input_mode) {