diff options
Diffstat (limited to 'lib/lib.c')
| -rw-r--r-- | lib/lib.c | 29 |
1 files changed, 29 insertions, 0 deletions
@@ -216,6 +216,7 @@ int mkpath(char *dir) } // Split a path into linked list of components, tracking head and tail of list. +// Assigns head of list to *list, returns address of ->next entry to extend list // Filters out // entries with no contents. struct string_list **splitpath(char *path, struct string_list **list) { @@ -1028,6 +1029,34 @@ char *fileunderdir(char *file, char *dir) return rc ? s2 : 0; } +// return (malloced) relative path to get from "from" to "to" +char *relative_path(char *from, char *to) +{ + char *s, *ret = 0; + int i, j, k; + + if (!(from = xabspath(from, -1))) return 0; + if (!(to = xabspath(to, -1))) goto error; + + // skip common directories from root + for (i = j = 0; from[i] && from[i] == to[i]; i++) if (to[i] == '/') j = i+1; + + // count remaining destination directories + for (i = j, k = 0; from[i]; i++) if (from[i] == '/') k++; + + if (!k) ret = xstrdup(to+j); + else { + s = ret = xmprintf("%*c%s", 3*k, ' ', to+j); + while (k--) memcpy(s+3*k, "../", 3); + } + +error: + free(from); + free(to); + + return ret; +} + // Execute a callback for each PID that matches a process name from a list. void names_to_pid(char **names, int (*callback)(pid_t pid, char *name), int scripts) |