[libvirt] [PATCH v3 2/2] util: fix locale problem with virStrToDouble().

This commit fixes a locale problem with locales that use comma as a mantissa separator. Example: 12.34 en_US = 12,34 pt_BR. Since strtod() is a non-safe function, virStrToDouble() will have problems to parse double numbers from kernel settings and other double numbers from static files (XMLs, JSONs, etc). Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1457634 Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1457481 Signed-off-by: Julio Faracco <jcfaracco(a)gmail.com&gt; --- src/util/virstring.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/src/util/virstring.c b/src/util/virstring.c index 9c12f7b..1bd6777 100644 --- a/src/util/virstring.c +++ b/src/util/virstring.c @@ -534,7 +534,13 @@ virLocaleOnceInit(void) VIR_ONCE_GLOBAL_INIT(virLocale); #endif - +/** + * virStrToDouble + * + * converts string with C locale (thread-safe) to double. + * + * Returns -1 on error or returns 0 on success. + */ int virStrToDouble(char const *s, char **end_ptr, @@ -545,7 +551,17 @@ virStrToDouble(char const *s, int err; errno = 0; +#if HAVE_NEWLOCALE + locale_t old_loc; + if (virLocaleInitialize() < 0) + return -1; + + old_loc = uselocale(virLocale); +#endif val = strtod(s, &p); /* exempt from syntax-check */ +#if HAVE_NEWLOCALE + uselocale(old_loc); +#endif err = (errno || (!end_ptr && *p) || p == s); if (end_ptr) *end_ptr = p; -- 2.7.4