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Commit | Line | Data |
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26c8a533 LT |
1 | /* |
2 | * I'm tired of doing "vsnprintf()" etc just to open a | |
3 | * file, so here's a "return static buffer with printf" | |
4 | * interface for paths. | |
5 | * | |
6 | * It's obviously not thread-safe. Sue me. But it's quite | |
7 | * useful for doing things like | |
8 | * | |
9 | * f = open(mkpath("%s/%s.git", base, name), O_RDONLY); | |
10 | * | |
11 | * which is what it's designed for. | |
12 | */ | |
13 | #include "cache.h" | |
14 | ||
15 | static char pathname[PATH_MAX]; | |
16 | static char bad_path[] = "/bad-path/"; | |
17 | ||
18 | static char *cleanup_path(char *path) | |
19 | { | |
20 | /* Clean it up */ | |
21 | if (!memcmp(path, "./", 2)) { | |
22 | path += 2; | |
23 | while (*path == '/') | |
24 | path++; | |
25 | } | |
26 | return path; | |
27 | } | |
28 | ||
29 | char *mkpath(const char *fmt, ...) | |
30 | { | |
31 | va_list args; | |
32 | unsigned len; | |
33 | ||
34 | va_start(args, fmt); | |
35 | len = vsnprintf(pathname, PATH_MAX, fmt, args); | |
36 | va_end(args); | |
37 | if (len >= PATH_MAX) | |
38 | return bad_path; | |
39 | return cleanup_path(pathname); | |
40 | } | |
41 | ||
42 | char *git_path(const char *fmt, ...) | |
43 | { | |
44 | const char *git_dir = gitenv(GIT_DIR_ENVIRONMENT) ? : DEFAULT_GIT_DIR_ENVIRONMENT; | |
45 | va_list args; | |
46 | unsigned len; | |
47 | ||
48 | len = strlen(git_dir); | |
49 | if (len > PATH_MAX-100) | |
50 | return bad_path; | |
51 | memcpy(pathname, git_dir, len); | |
52 | if (len && git_dir[len-1] != '/') | |
53 | pathname[len++] = '/'; | |
54 | va_start(args, fmt); | |
55 | len += vsnprintf(pathname + len, PATH_MAX - len, fmt, args); | |
56 | va_end(args); | |
57 | if (len >= PATH_MAX) | |
58 | return bad_path; | |
59 | return cleanup_path(pathname); | |
60 | } |