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Re: [libmicrohttpd] MHD can't find MO files


From: silvioprog
Subject: Re: [libmicrohttpd] MHD can't find MO files
Date: Fri, 24 Feb 2017 20:03:30 -0300

... and looking at gettext() docs, for libraries it must be "#define _(String) dgettext (PACKAGE, String)": https://www.gnu.org/software/gettext/manual/gettext.html#Libraries.

I'm going to try to fix that in the MHD sources and back with some patch ... :-)

On Fri, Feb 24, 2017 at 7:45 PM, silvioprog <address@hidden> wrote:
Complementing, the output translated message (for pt_BR) should be "Falha ao vincular à porta: Permission denied" instead of "Failed to bind to port 80: Permission denied".

On Fri, Feb 24, 2017 at 7:41 PM, silvioprog <address@hidden> wrote:
Hello masters,

I'm trying to translate the MHD messages, but any success in my tests. :-/

My steps (using MHD from trunk):

# build + install
./bootstrap && ./configure && sudo make install-strip && sudo ldconfig

# generate the POT file
xgettext --keyword=_ --language=C --add-comments --sort-output -o libmicrohttpd.pot src/microhttpd/*.c

# generate the PO file
msginit --input=libmicrohttpd.pot --locale=pt_BR --output=libmicrohttpd.po

Now, I open the .po file in the Poedit program and find the message "Failed to bind to port" as showed in the following picture:


After clicking in Save button, Poedit generates the .mo file used in my test:

# creating + building + running the test
mkdir -p test/locale/pt_BR/LC_MESSAGES
mv libmicrohttpd.mo libmicrohttpd.po test/locale/pt_BR/LC_MESSAGES
cd test
cat >main.c <<EOF
#include <stdio.h>
#include <locale.h>
#include <libintl.h>
#include <microhttpd.h>

static int ahc_echo(void *cls, struct MHD_Connection *cnc, const char *url, const char *method, const char *version,
                    const char *upload_data, size_t *upload_data_size, void **ptr) {
    return MHD_NO;
}

int main() {
    setlocale(LC_ALL, "");
    bindtextdomain("libmicrohttpd", "locale");
    textdomain("libmicrohttpd");
    MHD_start_daemon(MHD_USE_SELECT_INTERNALLY | MHD_FEATURE_MESSGES, 80, NULL, NULL, &ahc_echo, NULL, MHD_OPTION_END);
    return 0;
}
EOF
gcc -o test main.c -lmicrohttpd
export LANGUAGE=pt_BR
export LANG=pt_BR
./test
Failed to bind to port 80: Permission denied

OK, now let's go debug it checking errors:

strace -e trace=open ./test 
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
open("/usr/local/lib/libmicrohttpd.so.12", O_RDONLY|O_CLOEXEC) = 3
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
open("/usr/lib/x86_64-linux-gnu/libgnutls.so.30", O_RDONLY|O_CLOEXEC) = 3
open("/lib/x86_64-linux-gnu/libgcrypt.so.20", O_RDONLY|O_CLOEXEC) = 3
open("/lib/x86_64-linux-gnu/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
open("/lib/x86_64-linux-gnu/libz.so.1", O_RDONLY|O_CLOEXEC) = 3
open("/usr/lib/x86_64-linux-gnu/libp11-kit.so.0", O_RDONLY|O_CLOEXEC) = 3
open("/usr/lib/x86_64-linux-gnu/libidn.so.11", O_RDONLY|O_CLOEXEC) = 3
open("/usr/lib/x86_64-linux-gnu/libtasn1.so.6", O_RDONLY|O_CLOEXEC) = 3
open("/usr/lib/x86_64-linux-gnu/libnettle.so.6", O_RDONLY|O_CLOEXEC) = 3
open("/usr/lib/x86_64-linux-gnu/libhogweed.so.4", O_RDONLY|O_CLOEXEC) = 3
open("/usr/lib/x86_64-linux-gnu/libgmp.so.10", O_RDONLY|O_CLOEXEC) = 3
open("/lib/x86_64-linux-gnu/libgpg-error.so.0", O_RDONLY|O_CLOEXEC) = 3
open("/usr/lib/x86_64-linux-gnu/libffi.so.6", O_RDONLY|O_CLOEXEC) = 3
open("/lib/x86_64-linux-gnu/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
open("/dev/urandom", O_RDONLY)          = 3
open("/proc/sys/crypto/fips_enabled", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/etc/gcrypt/hwf.deny", O_RDONLY)  = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 4
open("/usr/share/locale/locale.alias", O_RDONLY|O_CLOEXEC) = 5
open("/usr/share/locale/pt_BR/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/pt/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale-langpack/pt_BR/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale-langpack/pt/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
Failed to bind to port 80: Permission denied
+++ exited with 0 +++

I.e, any call to the libmicrohttpd.mo file. :-/

So, how to translate MHD properly?

Thank you!

P.S: Looking at mhd_options.h I found the following comment:

/**
 * Macro to make it easy to mark text for translation. Note that
 * we do not actually call gettext() in MHD, but we do make it
 * easy to create a ".po" file so that applications that do want
 * to translate error messages can do so.
 */
#define _(String) (String)

sorry my ignorance, but, if MHD don't call gettext(), how will it translate the massages? o.O

--
Silvio Clécio



--
Silvio Clécio



--
Silvio Clécio

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