[PATCH iputils 6/6] ping: fix -i number parsing in locales

[Mike Frysinger]

Always use #.# format for the -i flag even when the current locale uses
a different separator.  Locale de_DE which uses #,# normally.

Simple testcase:
$ make USE_IDN=1
$ LANG=de_DE.UTF8 ./ping -i 0.5 localhost

Reported-by: Sergey Fionov <fio...@gmail.com>
Signed-off-by: Mike Frysinger <vap...@gentoo.org>
---
 ping_common.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/ping_common.c b/ping_common.c
index 62f53a6..0a37e09 100644
--- a/ping_common.c
+++ b/ping_common.c
@@ -269,9 +269,17 @@ void common_options(int ch)
                double dbl;
                char *ep;
 
+#ifdef USE_IDN
+               setlocale(LC_ALL, "C");
+#endif
+
                errno = 0;
                dbl = strtod(optarg, &ep);
 
+#ifdef USE_IDN
+               setlocale(LC_ALL, "");
+#endif
+
                if (errno || *ep != '\0' ||
                    !finite(dbl) || dbl < 0.0 || dbl >= (double)INT_MAX / 1000 
- 1.0) {
                        fprintf(stderr, "ping: bad timing interval\n");
-- 
2.8.2