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#include <stdio.h>
#include <string.h>
#include <locale.h>
#include <langinfo.h>
#include <stdlib.h>
#include <sys/types.h>
#include <dirent.h>
#include <errno.h>
static void sl(const char* loc)
{
if (!setlocale(LC_CTYPE, loc))
return;
if (strcmp(nl_langinfo(CODESET), "UTF-8"))
return;
printf("%s\n", loc);
exit(0);
}
int main(void)
{
/* try preferred values first */
sl("C.UTF-8");
sl("en_US.UTF-8");
DIR* dir = opendir("/usr/share/locale");
/* In that dir, FreeBSD and Solaris have qualified locale names. OpenBSD
has bare "UTF-8" which does work. Linux has unqualified dirs whose
names form ancient locales (except for some, like "vi"), but on the
other hand, Linux is likely to have "C.UTF-8".
*/
if (!dir)
{
fprintf(stderr, "Can't read /usr/share/locale: %s\n", strerror(errno));
return 1;
}
struct dirent *d;
while ((d = readdir(dir)))
sl(d->d_name);
return 1;
}
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