scandir_ok.c

/*
 * scandir_ok.c
 *
 * Copyright (c) 2018-2024 Eric Vidal <eric@obarun.org>
 *
 * All rights reserved.
 *
 * This file is part of Obarun. It is subject to the license terms in
 * the LICENSE file found in the top-level directory of this
 * distribution.
 * This file may not be copied, modified, propagated, or distributed
 * except according to the terms contained in the LICENSE file./
 */

#include <string.h>
#include <errno.h>

#include <oblibs/log.h>
#include <oblibs/string.h>

#include <skalibs/djbunix.h>

#include <66/utils.h>

#include <s6/supervise.h>

/** this following function come from Laurent Bercot
 * author of s6 library all rights reserved on this author
 * It was just modified a little bit to be able to scan
 * a scandir directory instead of a service directory */
int scandir_ok (char const *dir)
{
    log_flow() ;

    size_t dirlen = strlen(dir) ;
    int fd ;
    char fn[dirlen + 1 + strlen(S6_SVSCAN_CTLDIR) + 9] ;

    auto_strings(fn, dir, "/", S6_SVSCAN_CTLDIR, "/control") ;

    fd = open_write(fn) ;
    if (fd < 0)
    {
        if ((errno == ENXIO) || (errno == ENOENT)) return 0 ;
        else return -1 ;
    }
    fd_close(fd) ;

    return 1 ;
}