src/unistd/confstr.c


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#include "sys/types.h"
#include <unistd.h>
#include "errno.h"
#include "string.h"
#include "nonstd/assert.h"

size_t confstr(int name, char *buf, size_t len)
{
	char *value = NULL;

	if (len > 0) {
		ASSERT_NONNULL(buf);
	}

	switch (name) {
	#include "_confstr.h"
	default:
		value = NULL;
		break;
	}

	if (value == NULL) {
		errno = EINVAL;
		return 0;
	}

	if (len > 0) {
		strncpy(buf, value, len);
	}

	return strlen(value);
}

/*
POSIX(2)
*/