]>
Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
07800601 IM |
2 | /* |
3 | * I'm tired of doing "vsnprintf()" etc just to open a | |
4 | * file, so here's a "return static buffer with printf" | |
5 | * interface for paths. | |
6 | * | |
7 | * It's obviously not thread-safe. Sue me. But it's quite | |
8 | * useful for doing things like | |
9 | * | |
10 | * f = open(mkpath("%s/%s.perf", base, name), O_RDONLY); | |
11 | * | |
12 | * which is what it's designed for. | |
13 | */ | |
9a3993d4 | 14 | #include "path.h" |
fa0d9846 | 15 | #include "cache.h" |
9a3993d4 | 16 | #include <linux/kernel.h> |
175729fc | 17 | #include <limits.h> |
9a3993d4 | 18 | #include <stdio.h> |
fa0d9846 | 19 | #include <string.h> |
9a3993d4 ACM |
20 | #include <sys/types.h> |
21 | #include <sys/stat.h> | |
06c3f2aa | 22 | #include <dirent.h> |
9a3993d4 | 23 | #include <unistd.h> |
07800601 IM |
24 | |
25 | static char bad_path[] = "/bad-path/"; | |
26 | /* | |
814b3f51 | 27 | * One hack: |
07800601 | 28 | */ |
07800601 IM |
29 | static char *get_pathname(void) |
30 | { | |
31 | static char pathname_array[4][PATH_MAX]; | |
83a0944f IM |
32 | static int idx; |
33 | ||
34 | return pathname_array[3 & ++idx]; | |
07800601 IM |
35 | } |
36 | ||
37 | static char *cleanup_path(char *path) | |
38 | { | |
39 | /* Clean it up */ | |
40 | if (!memcmp(path, "./", 2)) { | |
41 | path += 2; | |
42 | while (*path == '/') | |
43 | path++; | |
44 | } | |
45 | return path; | |
46 | } | |
47 | ||
07800601 IM |
48 | char *mkpath(const char *fmt, ...) |
49 | { | |
50 | va_list args; | |
51 | unsigned len; | |
52 | char *pathname = get_pathname(); | |
53 | ||
54 | va_start(args, fmt); | |
55 | len = vsnprintf(pathname, PATH_MAX, fmt, args); | |
56 | va_end(args); | |
57 | if (len >= PATH_MAX) | |
58 | return bad_path; | |
59 | return cleanup_path(pathname); | |
60 | } | |
9a3993d4 ACM |
61 | |
62 | int path__join(char *bf, size_t size, const char *path1, const char *path2) | |
63 | { | |
64 | return scnprintf(bf, size, "%s%s%s", path1, path1[0] ? "/" : "", path2); | |
65 | } | |
66 | ||
67 | int path__join3(char *bf, size_t size, const char *path1, const char *path2, const char *path3) | |
68 | { | |
69 | return scnprintf(bf, size, "%s%s%s%s%s", path1, path1[0] ? "/" : "", | |
70 | path2, path2[0] ? "/" : "", path3); | |
71 | } | |
72 | ||
73 | bool is_regular_file(const char *file) | |
74 | { | |
75 | struct stat st; | |
76 | ||
77 | if (stat(file, &st)) | |
78 | return false; | |
79 | ||
80 | return S_ISREG(st.st_mode); | |
81 | } | |
06c3f2aa JO |
82 | |
83 | /* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */ | |
84 | bool is_directory(const char *base_path, const struct dirent *dent) | |
85 | { | |
86 | char path[PATH_MAX]; | |
87 | struct stat st; | |
88 | ||
89 | sprintf(path, "%s/%s", base_path, dent->d_name); | |
90 | if (stat(path, &st)) | |
91 | return false; | |
92 | ||
93 | return S_ISDIR(st.st_mode); | |
94 | } |