#include <unistd.h>
#include <stdio.h>
#include <errno.h>

size_t confstr(int name, char *buf, size_t len)
{
	const char *s = "";
	if (!name) {
		s = "/bin:/usr/bin";
	} else if ((name&~4U)!=1 && name-_CS_POSIX_V6_ILP32_OFF32_CFLAGS>33U) {
		errno = EINVAL;
		return 0;
	}

	if (name == _CS_POSIX_V7_WIDTH_RESTRICTED_ENVS ||
	    // Since sysconf _SC_V7_ILP32_OFF32 = -1
	    name == _CS_POSIX_V7_ILP32_OFF32_CFLAGS ||
	    name == _CS_POSIX_V7_ILP32_OFF32_LDFLAGS ||
	    name == _CS_POSIX_V7_ILP32_OFF32_LIBS ||
	    // Since sysconf _SC_V7_LPBIG_OFFBIG = -1
	    name == _CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS ||
	    name == _CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS ||
	    name == _CS_POSIX_V7_LPBIG_OFFBIG_LIBS) {
		return 0;
	}

	// snprintf is overkill but avoid wasting code size to implement
	// this completely useless function and its truncation semantics
	return snprintf(buf, len, "%s", s) + 1;
}