Rob Landley | 103b7e0 | 2007-10-04 02:04:10 -0500 | [diff] [blame^] | 1 | /* vi: set sw=4 ts=4 :*/ |
| 2 | /* dirtree.c - Functions for dealing with directory trees. |
| 3 | * |
| 4 | * Copyright 2007 Rob Landley <rob@landley.net> |
| 5 | */ |
| 6 | |
| 7 | #include "toys.h" |
| 8 | |
| 9 | // Create a dirtree node from a path. |
| 10 | |
| 11 | struct dirtree *dirtree_add_node(char *path) |
| 12 | { |
| 13 | struct dirtree *dt; |
| 14 | char *name; |
| 15 | |
| 16 | // Find last chunk of name. |
| 17 | |
| 18 | for (;;) { |
| 19 | name = strrchr(path, '/'); |
| 20 | |
| 21 | if (!name) name = path; |
| 22 | else { |
| 23 | if (*(name+1)) name++; |
| 24 | else { |
| 25 | *name=0; |
| 26 | continue; |
| 27 | } |
| 28 | } |
| 29 | break; |
| 30 | } |
| 31 | |
| 32 | dt = xzalloc(sizeof(struct dirtree)+strlen(name)+1); |
| 33 | xstat(path, &(dt->st)); |
| 34 | strcpy(dt->name, name); |
| 35 | |
| 36 | return dt; |
| 37 | } |
| 38 | |
| 39 | // Given a directory (in a writeable PATH_MAX buffer), recursively read in a |
| 40 | // directory tree. |
| 41 | // |
| 42 | // If callback==NULL, allocate tree of struct dirtree and |
| 43 | // return root of tree. Otherwise call callback(node) on each hit, free |
| 44 | // structures after use, and return NULL. |
| 45 | |
| 46 | struct dirtree *dirtree_read(char *path, struct dirtree *parent, |
| 47 | int (*callback)(struct dirtree *node)) |
| 48 | { |
| 49 | struct dirtree *dt = NULL, **ddt = &dt; |
| 50 | DIR *dir; |
| 51 | int len = strlen(path); |
| 52 | |
| 53 | if (!(dir = opendir(path))) perror_msg("No %s", path); |
| 54 | |
| 55 | for (;;) { |
| 56 | struct dirent *entry = readdir(dir); |
| 57 | if (!entry) break; |
| 58 | |
| 59 | // Skip "." and ".." |
| 60 | if (entry->d_name[0]=='.') { |
| 61 | if (!entry->d_name[1]) continue; |
| 62 | if (entry->d_name[1]=='.' && !entry->d_name[2]) continue; |
| 63 | } |
| 64 | |
| 65 | snprintf(path+len, sizeof(toybuf)-len, "/%s", entry->d_name); |
| 66 | *ddt = dirtree_add_node(path); |
| 67 | (*ddt)->parent = parent; |
| 68 | if (callback) callback(*ddt); |
| 69 | if (entry->d_type == DT_DIR) |
| 70 | (*ddt)->child = dirtree_read(path, *ddt, callback); |
| 71 | if (callback) free(*ddt); |
| 72 | else ddt = &((*ddt)->next); |
| 73 | path[len]=0; |
| 74 | } |
| 75 | |
| 76 | return dt; |
| 77 | } |
| 78 | |
| 79 | |