Fix ref_newer() in send-pack.
[git/git.git] / path.c
CommitLineData
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
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{
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}