1  /*-
 2   * Copyright (c) 2024 Kyle Evans <kevans@FreeBSD.org>
 3   *
 4   * SPDX-License-Identifier: BSD-2-Clause
 5   */
 6  
 7  #include <assert.h>
 8  #include <fcntl.h>
 9  #include <libgen.h>
10  #include <limits.h>
11  #include <stdlib.h>
12  
13  static inline int
14  open_progdir(const char *prog)
15  {
16  	char pdir[PATH_MAX], *resolved;
17  	int dfd;
18  
19  	resolved = realpath(prog, &pdir[0]);
20  	assert(resolved != NULL);
21  
22  	resolved = dirname(&pdir[0]);
23  	assert(resolved != NULL);
24  
25  	dfd = open(resolved, O_DIRECTORY);
26  	assert(dfd != -1);
27  
28  	return (dfd);
29  }