Add test case for git-config-set
[git/git.git] / path.c
CommitLineData
26c8a533
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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
15static char pathname[PATH_MAX];
16static char bad_path[] = "/bad-path/";
17
18static 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
29char *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
42char *git_path(const char *fmt, ...)
43{
5da1606d 44 const char *git_dir = get_git_dir();
26c8a533
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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}
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61
62
63/* git_mkstemp() - create tmp file honoring TMPDIR variable */
64int git_mkstemp(char *path, size_t len, const char *template)
65{
66 char *env, *pch = path;
67
68 if ((env = getenv("TMPDIR")) == NULL) {
69 strcpy(pch, "/tmp/");
70 len -= 5;
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71 pch += 5;
72 } else {
73 size_t n = snprintf(pch, len, "%s/", env);
74
75 len -= n;
76 pch += n;
77 }
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78
79 safe_strncpy(pch, template, len);
80
81 return mkstemp(path);
82}
83
84
85char *safe_strncpy(char *dest, const char *src, size_t n)
86{
87 strncpy(dest, src, n);
88 dest[n - 1] = '\0';
89
90 return dest;
91}