lookip: Use line buffering for stdout

Otherwise, the output is buffered when e.g. piping the output to another
command (or file).  And it avoids having to call fflush() in the
interactive mode.

Fixes #3404.

diff --git a/src/libcharon/plugins/lookip/lookip.c b/src/libcharon/plugins/lookip/lookip.c
index d473c7022e17eedb8e01a80d9fa34dca20d3b612..6d82e1a172ca89f20e981f38dd9e2d75836793e2 100644 (file)
--- a/src/libcharon/plugins/lookip/lookip.c
+++ b/src/libcharon/plugins/lookip/lookip.c
@@ -203,7 +203,6 @@ static int interactive(int fd)
                int res;
 
                printf("> ");
-               fflush(stdout);
 
                if (fgets(line, sizeof(line), stdin))
                {
@@ -266,6 +265,8 @@ int main(int argc, char *argv[])
                return 1;
        }
 
+       setvbuf(stdout, NULL, _IOLBF, 0);
+
        if (argc == 1)
        {
                res = interactive(fd);