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Commit | Line | Data |
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5b8e6f85 DP |
1 | #include "cache.h" |
2 | ||
90b4a71c JH |
3 | /* |
4 | * Do not use this for inspecting *tracked* content. When path is a | |
5 | * symlink to a directory, we do not want to say it is a directory when | |
6 | * dealing with tracked content in the working tree. | |
7 | */ | |
8 | int is_directory(const char *path) | |
9 | { | |
10 | struct stat st; | |
11 | return (!stat(path, &st) && S_ISDIR(st.st_mode)); | |
12 | } | |
13 | ||
5b8e6f85 DP |
14 | /* We allow "recursive" symbolic links. Only within reason, though. */ |
15 | #define MAXDEPTH 5 | |
16 | ||
17 | const char *make_absolute_path(const char *path) | |
18 | { | |
19 | static char bufs[2][PATH_MAX + 1], *buf = bufs[0], *next_buf = bufs[1]; | |
20 | char cwd[1024] = ""; | |
1630726e | 21 | int buf_index = 1; |
5b8e6f85 DP |
22 | |
23 | int depth = MAXDEPTH; | |
24 | char *last_elem = NULL; | |
25 | struct stat st; | |
26 | ||
27 | if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX) | |
28 | die ("Too long path: %.*s", 60, path); | |
29 | ||
30 | while (depth--) { | |
90b4a71c | 31 | if (!is_directory(buf)) { |
5b8e6f85 DP |
32 | char *last_slash = strrchr(buf, '/'); |
33 | if (last_slash) { | |
34 | *last_slash = '\0'; | |
35 | last_elem = xstrdup(last_slash + 1); | |
36 | } else { | |
37 | last_elem = xstrdup(buf); | |
38 | *buf = '\0'; | |
39 | } | |
40 | } | |
41 | ||
42 | if (*buf) { | |
43 | if (!*cwd && !getcwd(cwd, sizeof(cwd))) | |
0721c314 | 44 | die_errno ("Could not get current working directory"); |
5b8e6f85 DP |
45 | |
46 | if (chdir(buf)) | |
0721c314 | 47 | die_errno ("Could not switch to '%s'", buf); |
5b8e6f85 DP |
48 | } |
49 | if (!getcwd(buf, PATH_MAX)) | |
0721c314 | 50 | die_errno ("Could not get current working directory"); |
5b8e6f85 DP |
51 | |
52 | if (last_elem) { | |
1630726e | 53 | size_t len = strlen(buf); |
5b8e6f85 DP |
54 | if (len + strlen(last_elem) + 2 > PATH_MAX) |
55 | die ("Too long path name: '%s/%s'", | |
56 | buf, last_elem); | |
ed0cb46e NTND |
57 | if (len && buf[len-1] != '/') |
58 | buf[len++] = '/'; | |
59 | strcpy(buf + len, last_elem); | |
5b8e6f85 DP |
60 | free(last_elem); |
61 | last_elem = NULL; | |
62 | } | |
63 | ||
64 | if (!lstat(buf, &st) && S_ISLNK(st.st_mode)) { | |
1630726e | 65 | ssize_t len = readlink(buf, next_buf, PATH_MAX); |
5b8e6f85 | 66 | if (len < 0) |
0721c314 | 67 | die_errno ("Invalid symlink '%s'", buf); |
737e31af JH |
68 | if (PATH_MAX <= len) |
69 | die("symbolic link too long: %s", buf); | |
5b8e6f85 DP |
70 | next_buf[len] = '\0'; |
71 | buf = next_buf; | |
72 | buf_index = 1 - buf_index; | |
73 | next_buf = bufs[buf_index]; | |
74 | } else | |
75 | break; | |
76 | } | |
77 | ||
78 | if (*cwd && chdir(cwd)) | |
0721c314 | 79 | die_errno ("Could not change back to '%s'", cwd); |
5b8e6f85 DP |
80 | |
81 | return buf; | |
82 | } | |
10c4c881 JS |
83 | |
84 | static const char *get_pwd_cwd(void) | |
85 | { | |
86 | static char cwd[PATH_MAX + 1]; | |
87 | char *pwd; | |
88 | struct stat cwd_stat, pwd_stat; | |
89 | if (getcwd(cwd, PATH_MAX) == NULL) | |
90 | return NULL; | |
91 | pwd = getenv("PWD"); | |
92 | if (pwd && strcmp(pwd, cwd)) { | |
93 | stat(cwd, &cwd_stat); | |
94 | if (!stat(pwd, &pwd_stat) && | |
95 | pwd_stat.st_dev == cwd_stat.st_dev && | |
96 | pwd_stat.st_ino == cwd_stat.st_ino) { | |
97 | strlcpy(cwd, pwd, PATH_MAX); | |
98 | } | |
99 | } | |
100 | return cwd; | |
101 | } | |
102 | ||
103 | const char *make_nonrelative_path(const char *path) | |
104 | { | |
105 | static char buf[PATH_MAX + 1]; | |
106 | ||
107 | if (is_absolute_path(path)) { | |
108 | if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX) | |
109 | die("Too long path: %.*s", 60, path); | |
110 | } else { | |
b248e950 ES |
111 | size_t len; |
112 | const char *fmt; | |
10c4c881 JS |
113 | const char *cwd = get_pwd_cwd(); |
114 | if (!cwd) | |
0721c314 | 115 | die_errno("Cannot determine the current working directory"); |
b248e950 ES |
116 | len = strlen(cwd); |
117 | fmt = (len > 0 && is_dir_sep(cwd[len-1])) ? "%s%s" : "%s/%s"; | |
118 | if (snprintf(buf, PATH_MAX, fmt, cwd, path) >= PATH_MAX) | |
10c4c881 JS |
119 | die("Too long path: %.*s", 60, path); |
120 | } | |
121 | return buf; | |
122 | } |