Bug 6530 [1] causes "git show v0.99.6~1" to fail with error "your vsnprintf is broken". The workaround avoids that, but it corrupts system error messages in non-C locales.
The bug has been fixed since 2.17. If git is built with glibc, it can know running libc version with gnu_get_libc_version() and avoid the workaround on fixed versions. The workaround is also dropped for all non-glibc systems. Tested on Gentoo Linux, glibc 2.17, amd64. [1] http://sourceware.org/bugzilla/show_bug.cgi?id=6530 Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com> --- v2 removes USE_GLIBC and lets git-compat-util.h do the detection gettext.c | 24 ++++++++++++++++-------- git-compat-util.h | 11 +++++++++++ 2 files changed, 27 insertions(+), 8 deletions(-) diff --git a/gettext.c b/gettext.c index 71e9545..772ab92 100644 --- a/gettext.c +++ b/gettext.c @@ -30,7 +30,7 @@ int use_gettext_poison(void) #ifndef NO_GETTEXT static const char *charset; -static void init_gettext_charset(const char *domain) +static void init_gettext_charset(const char *domain, int vsnprintf_broken) { /* This trick arranges for messages to be emitted in the user's @@ -99,9 +99,7 @@ static void init_gettext_charset(const char *domain) $ LANGUAGE= LANG=de_DE.utf8 ./test test: Kein passendes Ger?t gefunden - In the long term we should probably see about getting that - vsnprintf bug in glibc fixed, and audit our code so it won't - fall apart under a non-C locale. + The vsnprintf bug has been fixed since 2.17. Then we could simply set LC_CTYPE from the environment, which would make things like the external perror(3) messages work. @@ -112,21 +110,31 @@ static void init_gettext_charset(const char *domain) 1. http://sourceware.org/bugzilla/show_bug.cgi?id=6530 2. E.g. "Content-Type: text/plain; charset=UTF-8\n" in po/is.po */ - setlocale(LC_CTYPE, ""); + if (vsnprintf_broken) + setlocale(LC_CTYPE, ""); charset = locale_charset(); bind_textdomain_codeset(domain, charset); - setlocale(LC_CTYPE, "C"); + if (vsnprintf_broken) + setlocale(LC_CTYPE, "C"); } void git_setup_gettext(void) { const char *podir = getenv("GIT_TEXTDOMAINDIR"); + const char *version = glibc_version(); + int major, minor, vsnprintf_broken; + + if (version && sscanf(version, "%d.%d", &major, &minor) == 2 && + (major > 2 || (major == 2 && minor >= 17))) + vsnprintf_broken = 0; + else + vsnprintf_broken = 1; if (!podir) podir = GIT_LOCALE_PATH; bindtextdomain("git", podir); - setlocale(LC_MESSAGES, ""); - init_gettext_charset("git"); + setlocale(vsnprintf_broken ? LC_MESSAGES : LC_ALL, ""); + init_gettext_charset("git", vsnprintf_broken); textdomain("git"); } diff --git a/git-compat-util.h b/git-compat-util.h index 7776f12..967f452 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -488,11 +488,22 @@ extern int git_vsnprintf(char *str, size_t maxsize, #ifdef __GLIBC_PREREQ #if __GLIBC_PREREQ(2, 1) +#include <gnu/libc-version.h> +#define glibc_version() gnu_get_libc_version() #define HAVE_STRCHRNUL #define HAVE_MEMPCPY #endif #endif +#ifndef glibc_version +#ifdef __GNU_LIBRARY__ +#define glibc_version() NULL +#else +/* non-glibc platforms, see git_setup_gettext() for "2.17" */ +#define glibc_version() "2.17" +#endif +#endif + #ifndef HAVE_STRCHRNUL #define strchrnul gitstrchrnul static inline char *gitstrchrnul(const char *s, int c) -- 1.8.2.83.gc99314b -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
