[libvirt] [PATCH v2] 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 | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/src/util/virstring.c b/src/util/virstring.c index 089b539..6dd5138 100644 --- a/src/util/virstring.c +++ b/src/util/virstring.c @@ -28,6 +28,7 @@ #include "base64.h" #include "c-ctype.h" #include "virstring.h" +#include "virthread.h" #include "viralloc.h" #include "virbuffer.h" #include "virerror.h" @@ -516,6 +517,22 @@ virStrToLong_ullp(char const *s, char **end_ptr, int base, return 0; } +#if HAVE_NEWLOCALE + +static locale_t virLocale; + +static int +virLocaleOnceInit(void) +{ + virLocale = newlocale(LC_ALL_MASK, "C", (locale_t)0); + if (!virLocale) + return -1; + return 0; +} + +VIR_ONCE_GLOBAL_INIT(virLocale); +#endif + int virStrToDouble(char const *s, char **end_ptr, @@ -526,7 +543,17 @@ 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