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#include <stdio.h>
#include <errno.h>
#include <unistd.h>
int main() {
int vals[] = {
_CS_PATH,
_CS_POSIX_V6_WIDTH_RESTRICTED_ENVS,
_CS_GNU_LIBC_VERSION,
_CS_GNU_LIBPTHREAD_VERSION,
_CS_POSIX_V6_ILP32_OFF32_LIBS,
_CS_POSIX_V6_ILP32_OFFBIG_LIBS,
_CS_POSIX_V6_LP64_OFF64_CFLAGS,
_CS_POSIX_V6_LP64_OFF64_LDFLAGS,
_CS_POSIX_V6_LP64_OFF64_LIBS,
_CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS,
_CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS,
_CS_POSIX_V6_LPBIG_OFFBIG_LIBS,
_CS_POSIX_V6_ILP32_OFF32_CFLAGS,
_CS_POSIX_V6_ILP32_OFF32_LDFLAGS,
_CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS,
_CS_POSIX_V6_ILP32_OFFBIG_CFLAGS
};
char* names[] = {
"_CS_PATH",
"_CS_POSIX_V6_WIDTH_RESTRICTED_ENVS",
"_CS_GNU_LIBC_VERSION",
"_CS_GNU_LIBPTHREAD_VERSION",
"_CS_POSIX_V6_ILP32_OFF32_LIBS",
"_CS_POSIX_V6_ILP32_OFFBIG_LIBS",
"_CS_POSIX_V6_LP64_OFF64_CFLAGS",
"_CS_POSIX_V6_LP64_OFF64_LDFLAGS",
"_CS_POSIX_V6_LP64_OFF64_LIBS",
"_CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS",
"_CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS",
"_CS_POSIX_V6_LPBIG_OFFBIG_LIBS",
"_CS_POSIX_V6_ILP32_OFF32_CFLAGS",
"_CS_POSIX_V6_ILP32_OFF32_LDFLAGS",
"_CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS",
"_CS_POSIX_V6_ILP32_OFFBIG_CFLAGS"
};
char buffer[256];
for (int i = 0; i < sizeof vals / sizeof vals[0]; i++) {
printf("ret: %d\n", confstr(vals[i], buffer, 256));
printf("%s: %s\n", names[i], buffer);
printf("errno: %d\n\n", errno);
errno = 0;
}
printf("(invalid) ret: %d\n", confstr(-123, buffer, 256));
printf("errno: %d\n", errno);
return 0;
}
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