libakerror/tests/err_errno.c

#include "akerror.h"
#include "err_capture.h"
#include <errno.h>

/*
 * The library imports system errno codes and their descriptions at build time
 * (scripts/generrno.sh -> akerr_init_errno). Verify:
 *   - a system errno (EACCES) has a registered, non-empty name;
 *   - an unregistered status returns the "Unknown Error" sentinel;
 *   - a system errno can be raised, propagated and handled like any AKERR_* code.
 */

static int handled = 0;

akerr_ErrorContext *boom(void)
{
    PREPARE_ERROR(e);
    FAIL_RETURN(e, EACCES, "permission denied");
}

int main(void)
{
    akerr_capture_install();
    akerr_init();

    char *nm = akerr_name_for_status(EACCES, NULL);
    AKERR_CHECK(nm != NULL);
    AKERR_CHECK(nm[0] != '\0');
#if AKERR_USE_STDLIB
    /* akerr_init_errno() -- the only thing that registers a name for a host
     * errno -- is not called when AKERR_USE_STDLIB is OFF (see
     * akerr_init_state() in src/error.c), so EACCES deliberately reads back
     * as "Unknown Error" in that configuration. */
    AKERR_CHECK(strcmp(nm, "Unknown Error") != 0);
#endif

    AKERR_CHECK(strcmp(akerr_name_for_status(1000000, NULL),
		       "Unknown Error") == 0);

    PREPARE_ERROR(e);
    ATTEMPT {
	CATCH(e, boom());
    } CLEANUP {
    } PROCESS(e) {
    } HANDLE(e, EACCES) {
	AKERR_CHECK_STATUS(e, EACCES);
	handled = 1;
    } FINISH_NORETURN(e);

    AKERR_CHECK(handled == 1);
    AKERR_CHECK(akerr_slots_in_use() == 0);
    fprintf(stderr, "err_errno ok (EACCES name: \"%s\")\n", nm);
    return 0;
}