1// SPDX-License-Identifier: GPL-2.0
2#include "path.h"
3#include "cache.h"
4#include <linux/kernel.h>
5#include <limits.h>
6#include <stdio.h>
7#include <string.h>
8#include <sys/types.h>
9#include <sys/stat.h>
10#include <dirent.h>
11#include <unistd.h>
12
13static char *cleanup_path(char *path)
14{
15	/* Clean it up */
16	if (!memcmp(path, "./", 2)) {
17		path += 2;
18		while (*path == '/')
19			path++;
20	}
21	return path;
22}
23
24char *mkpath(char *path_buf, size_t sz, const char *fmt, ...)
25{
26	va_list args;
27	unsigned len;
28
29	va_start(args, fmt);
30	len = vsnprintf(path_buf, sz, fmt, args);
31	va_end(args);
32	if (len >= sz)
33		strncpy(path_buf, "/bad-path/", sz);
34	return cleanup_path(path_buf);
35}
36
37int path__join(char *bf, size_t size, const char *path1, const char *path2)
38{
39	return scnprintf(bf, size, "%s%s%s", path1, path1[0] ? "/" : "", path2);
40}
41
42int path__join3(char *bf, size_t size, const char *path1, const char *path2, const char *path3)
43{
44	return scnprintf(bf, size, "%s%s%s%s%s", path1, path1[0] ? "/" : "",
45			 path2, path2[0] ? "/" : "", path3);
46}
47
48bool is_regular_file(const char *file)
49{
50	struct stat st;
51
52	if (stat(file, &st))
53		return false;
54
55	return S_ISREG(st.st_mode);
56}
57
58/* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */
59bool is_directory(const char *base_path, const struct dirent *dent)
60{
61	char path[PATH_MAX];
62	struct stat st;
63
64	snprintf(path, sizeof(path), "%s/%s", base_path, dent->d_name);
65	if (stat(path, &st))
66		return false;
67
68	return S_ISDIR(st.st_mode);
69}
70
71bool is_executable_file(const char *base_path, const struct dirent *dent)
72{
73	char path[PATH_MAX];
74	struct stat st;
75
76	snprintf(path, sizeof(path), "%s/%s", base_path, dent->d_name);
77	if (stat(path, &st))
78		return false;
79
80	return !S_ISDIR(st.st_mode) && (st.st_mode & S_IXUSR);
81}
82