1 /* vi: set sw=4 ts=4: */
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
12 #undef DEBUG_RECURS_ACTION
15 * Walk down all the directories under the specified
16 * location, and do something (something specified
17 * by the fileAction and dirAction function pointers).
19 * Unfortunately, while nftw(3) could replace this and reduce
20 * code size a bit, nftw() wasn't supported before GNU libc 2.1,
21 * and so isn't sufficiently portable to take over since glibc2.1
22 * is so stinking huge.
25 static int true_action(const char *fileName ATTRIBUTE_UNUSED,
26 struct stat *statbuf ATTRIBUTE_UNUSED,
27 void* userData ATTRIBUTE_UNUSED,
28 int depth ATTRIBUTE_UNUSED)
33 /* fileAction return value of 0 on any file in directory will make
34 * recursive_action() return 0, but it doesn't stop directory traversal
35 * (fileAction/dirAction will be called on each file).
37 * if !depthFirst, dirAction return value of 0 (FALSE) or 2 (SKIP)
38 * prevents recursion into that directory, instead
39 * recursive_action() returns 0 (if FALSE) or 1 (if SKIP).
41 * followLinks=0/1 differs mainly in handling of links to dirs.
42 * 0: lstat(statbuf). Calls fileAction on link name even if points to dir.
43 * 1: stat(statbuf). Calls dirAction and optionally recurse on link to dir.
46 int recursive_action(const char *fileName,
48 int (*fileAction)(const char *fileName, struct stat *statbuf, void* userData, int depth),
49 int (*dirAction)(const char *fileName, struct stat *statbuf, void* userData, int depth),
58 if (!fileAction) fileAction = true_action;
59 if (!dirAction) dirAction = true_action;
61 status = ACTION_FOLLOWLINKS; /* hijack a variable for bitmask... */
62 if (!depth) status = ACTION_FOLLOWLINKS | ACTION_FOLLOWLINKS_L0;
63 status = ((flags & status) ? stat : lstat)(fileName, &statbuf);
65 #ifdef DEBUG_RECURS_ACTION
66 bb_error_msg("status=%d flags=%x", status, flags);
71 /* If S_ISLNK(m), then we know that !S_ISDIR(m).
72 * Then we can skip checking first part: if it is true, then
73 * (!dir) is also true! */
74 if ( /* (!(flags & ACTION_FOLLOWLINKS) && S_ISLNK(statbuf.st_mode)) || */
75 !S_ISDIR(statbuf.st_mode)
77 return fileAction(fileName, &statbuf, userData, depth);
80 /* It's a directory (or a link to one, and followLinks is set) */
82 if (!(flags & ACTION_RECURSE)) {
83 return dirAction(fileName, &statbuf, userData, depth);
86 if (!(flags & ACTION_DEPTHFIRST)) {
87 status = dirAction(fileName, &statbuf, userData, depth);
94 dir = opendir(fileName);
96 /* findutils-4.1.20 reports this */
97 /* (i.e. it doesn't silently return with exit code 1) */
98 /* To trigger: "find -exec rm -rf {} \;" */
102 while ((next = readdir(dir)) != NULL) {
105 nextFile = concat_subpath_file(fileName, next->d_name);
106 if (nextFile == NULL)
108 /* now descend into it (NB: ACTION_RECURSE is set in flags) */
109 if (!recursive_action(nextFile, flags, fileAction, dirAction, userData, depth+1))
115 if (flags & ACTION_DEPTHFIRST) {
116 if (!dirAction(fileName, &statbuf, userData, depth))
125 bb_simple_perror_msg(fileName);