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
cleanup_path(char * path)13 static 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
mkpath(char * path_buf,size_t sz,const char * fmt,...)24 char *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
path__join(char * bf,size_t size,const char * path1,const char * path2)37 int 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
path__join3(char * bf,size_t size,const char * path1,const char * path2,const char * path3)42 int 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
is_regular_file(const char * file)48 bool 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 */
is_directory(const char * base_path,const struct dirent * dent)59 bool 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
is_executable_file(const char * base_path,const struct dirent * dent)71 bool 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