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 source tree.
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 FAST_FUNC
true_action(const char *fileName UNUSED_PARAM
,
26 struct stat
*statbuf UNUSED_PARAM
,
27 void* userData UNUSED_PARAM
,
28 int depth UNUSED_PARAM
)
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 !ACTION_RECURSE, dirAction is called on the directory and its
38 * return value is returned from recursive_action(). No recursion.
40 * If ACTION_RECURSE, recursive_action() is called on each directory.
41 * If any one of these calls returns 0, current recursive_action() returns 0.
43 * If ACTION_DEPTHFIRST, dirAction is called after recurse.
44 * If it returns 0, the warning is printed and recursive_action() returns 0.
46 * If !ACTION_DEPTHFIRST, dirAction is called before we recurse.
47 * Return value of 0 (FALSE) or 2 (SKIP) prevents recursion
48 * into that directory, instead recursive_action() returns 0 (if FALSE)
51 * ACTION_FOLLOWLINKS mainly controls handling of links to dirs.
52 * 0: lstat(statbuf). Calls fileAction on link name even if points to dir.
53 * 1: stat(statbuf). Calls dirAction and optionally recurse on link to dir.
56 int FAST_FUNC
recursive_action(const char *fileName
,
58 int FAST_FUNC (*fileAction
)(const char *fileName
, struct stat
*statbuf
, void* userData
, int depth
),
59 int FAST_FUNC (*dirAction
)(const char *fileName
, struct stat
*statbuf
, void* userData
, int depth
),
69 if (!fileAction
) fileAction
= true_action
;
70 if (!dirAction
) dirAction
= true_action
;
72 follow
= ACTION_FOLLOWLINKS
;
74 follow
= ACTION_FOLLOWLINKS
| ACTION_FOLLOWLINKS_L0
;
76 status
= (follow
? stat
: lstat
)(fileName
, &statbuf
);
78 #ifdef DEBUG_RECURS_ACTION
79 bb_error_msg("status=%d flags=%x", status
, flags
);
81 if ((flags
& ACTION_DANGLING_OK
)
83 && lstat(fileName
, &statbuf
) == 0
86 return fileAction(fileName
, &statbuf
, userData
, depth
);
91 /* If S_ISLNK(m), then we know that !S_ISDIR(m).
92 * Then we can skip checking first part: if it is true, then
93 * (!dir) is also true! */
94 if ( /* (!(flags & ACTION_FOLLOWLINKS) && S_ISLNK(statbuf.st_mode)) || */
95 !S_ISDIR(statbuf
.st_mode
)
97 return fileAction(fileName
, &statbuf
, userData
, depth
);
100 /* It's a directory (or a link to one, and followLinks is set) */
102 if (!(flags
& ACTION_RECURSE
)) {
103 return dirAction(fileName
, &statbuf
, userData
, depth
);
106 if (!(flags
& ACTION_DEPTHFIRST
)) {
107 status
= dirAction(fileName
, &statbuf
, userData
, depth
);
114 dir
= opendir(fileName
);
116 /* findutils-4.1.20 reports this */
117 /* (i.e. it doesn't silently return with exit code 1) */
118 /* To trigger: "find -exec rm -rf {} \;" */
122 while ((next
= readdir(dir
)) != NULL
) {
125 nextFile
= concat_subpath_file(fileName
, next
->d_name
);
126 if (nextFile
== NULL
)
128 /* process every file (NB: ACTION_RECURSE is set in flags) */
129 if (!recursive_action(nextFile
, flags
, fileAction
, dirAction
,
130 userData
, depth
+ 1))
132 // s = recursive_action(nextFile, flags, fileAction, dirAction,
133 // userData, depth + 1);
135 //#define RECURSE_RESULT_ABORT 3
136 // if (s == RECURSE_RESULT_ABORT) {
145 if (flags
& ACTION_DEPTHFIRST
) {
146 if (!dirAction(fileName
, &statbuf
, userData
, depth
))
153 if (!(flags
& ACTION_QUIET
))
154 bb_simple_perror_msg(fileName
);