Junio C Hamano | f859c84 | 2007-05-11 22:11:07 -0700 | [diff] [blame] | 1 | #include "cache.h" |
| 2 | |
| 3 | int has_symlink_leading_path(const char *name, char *last_symlink) |
| 4 | { |
| 5 | char path[PATH_MAX]; |
| 6 | const char *sp, *ep; |
| 7 | char *dp; |
| 8 | |
| 9 | sp = name; |
| 10 | dp = path; |
| 11 | |
| 12 | if (last_symlink && *last_symlink) { |
| 13 | size_t last_len = strlen(last_symlink); |
| 14 | size_t len = strlen(name); |
| 15 | if (last_len < len && |
| 16 | !strncmp(name, last_symlink, last_len) && |
| 17 | name[last_len] == '/') |
| 18 | return 1; |
| 19 | *last_symlink = '\0'; |
| 20 | } |
| 21 | |
| 22 | while (1) { |
| 23 | size_t len; |
| 24 | struct stat st; |
| 25 | |
| 26 | ep = strchr(sp, '/'); |
| 27 | if (!ep) |
| 28 | break; |
| 29 | len = ep - sp; |
| 30 | if (PATH_MAX <= dp + len - path + 2) |
| 31 | return 0; /* new name is longer than that??? */ |
| 32 | memcpy(dp, sp, len); |
| 33 | dp[len] = 0; |
| 34 | |
| 35 | if (lstat(path, &st)) |
| 36 | return 0; |
| 37 | if (S_ISLNK(st.st_mode)) { |
| 38 | if (last_symlink) |
| 39 | strcpy(last_symlink, path); |
| 40 | return 1; |
| 41 | } |
| 42 | |
| 43 | dp[len++] = '/'; |
| 44 | dp = dp + len; |
| 45 | sp = ep + 1; |
| 46 | } |
| 47 | return 0; |
| 48 | } |