*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
#include "libbb.h"
* is so stinking huge.
*/
-static int true_action(const char *fileName, struct stat *statbuf,
- void* userData, int depth)
+static int FAST_FUNC true_action(const char *fileName UNUSED_PARAM,
+ struct stat *statbuf UNUSED_PARAM,
+ void* userData UNUSED_PARAM,
+ int depth UNUSED_PARAM)
{
return TRUE;
}
-/* fileAction return value of 0 on any file in directory will make
- * recursive_action() return 0, but it doesn't stop directory traversal
+/* fileName is (l)stat'ed (depending on ACTION_FOLLOWLINKS[_L0]).
+ *
+ * If it is a file: fileAction in run on it, its return value is returned.
+ *
+ * In case we are in a recursive invocation (see below):
+ * normally, fileAction should return 1 (TRUE) to indicate that
+ * everything is okay and processing should continue.
+ * fileAction return value of 0 (FALSE) on any file in directory will make
+ * recursive_action() also return 0, but it doesn't stop directory traversal
* (fileAction/dirAction will be called on each file).
*
- * if !depthFirst, dirAction return value of 0 (FALSE) or 2 (SKIP)
- * prevents recursion into that directory, instead
- * recursive_action() returns 0 (if FALSE) or 1 (if SKIP).
+ * [TODO: maybe introduce -1 to mean "stop traversal NOW and return"]
+ *
+ * If it is a directory:
+ *
+ * If !ACTION_RECURSE, dirAction is called and its
+ * return value is returned from recursive_action(). No recursion.
+ *
+ * If ACTION_RECURSE, directory is opened, and recursive_action() is called
+ * on each file/subdirectory.
+ * If any one of these calls returns 0, current recursive_action() returns 0.
+ *
+ * If !ACTION_DEPTHFIRST, dirAction is called before recurse.
+ * Return value of 0 (FALSE) is an error: prevents recursion,
+ * the warning is printed (unless ACTION_QUIET) and recursive_action() returns 0.
+ * Return value of 2 (SKIP) prevents recursion, instead recursive_action()
+ * returns 1 (TRUE, no error).
+ *
+ * If ACTION_DEPTHFIRST, dirAction is called after recurse.
+ * If it returns 0, the warning is printed and recursive_action() returns 0.
*
- * followLinks=0/1 differs mainly in handling of links to dirs.
+ * ACTION_FOLLOWLINKS mainly controls handling of links to dirs.
* 0: lstat(statbuf). Calls fileAction on link name even if points to dir.
* 1: stat(statbuf). Calls dirAction and optionally recurse on link to dir.
*/
-int recursive_action(const char *fileName,
+int FAST_FUNC recursive_action(const char *fileName,
unsigned flags,
- int (*fileAction)(const char *fileName, struct stat *statbuf, void* userData, int depth),
- int (*dirAction)(const char *fileName, struct stat *statbuf, void* userData, int depth),
+ int FAST_FUNC (*fileAction)(const char *fileName, struct stat *statbuf, void* userData, int depth),
+ int FAST_FUNC (*dirAction)(const char *fileName, struct stat *statbuf, void* userData, int depth),
void* userData,
- const unsigned depth)
+ unsigned depth)
{
struct stat statbuf;
+ unsigned follow;
int status;
DIR *dir;
struct dirent *next;
if (!fileAction) fileAction = true_action;
if (!dirAction) dirAction = true_action;
- status = (flags & ACTION_FOLLOWLINKS ? stat : lstat)(fileName, &statbuf);
+ follow = ACTION_FOLLOWLINKS;
+ if (depth == 0)
+ follow = ACTION_FOLLOWLINKS | ACTION_FOLLOWLINKS_L0;
+ follow &= flags;
+ status = (follow ? stat : lstat)(fileName, &statbuf);
if (status < 0) {
#ifdef DEBUG_RECURS_ACTION
- bb_error_msg("status=%d followLinks=%d TRUE=%d",
- status, flags & ACTION_FOLLOWLINKS, TRUE);
+ bb_error_msg("status=%d flags=%x", status, flags);
#endif
+ if ((flags & ACTION_DANGLING_OK)
+ && errno == ENOENT
+ && lstat(fileName, &statbuf) == 0
+ ) {
+ /* Dangling link */
+ return fileAction(fileName, &statbuf, userData, depth);
+ }
goto done_nak_warn;
}
if (!(flags & ACTION_DEPTHFIRST)) {
status = dirAction(fileName, &statbuf, userData, depth);
- if (!status) {
+ if (status == FALSE)
goto done_nak_warn;
- }
if (status == SKIP)
return TRUE;
}
status = TRUE;
while ((next = readdir(dir)) != NULL) {
char *nextFile;
+ int s;
nextFile = concat_subpath_file(fileName, next->d_name);
if (nextFile == NULL)
continue;
- /* now descend into it, forcing recursion. */
- if (!recursive_action(nextFile, flags | ACTION_RECURSE,
- fileAction, dirAction, userData, depth+1)) {
+
+ /* process every file (NB: ACTION_RECURSE is set in flags) */
+ s = recursive_action(nextFile, flags, fileAction, dirAction,
+ userData, depth + 1);
+ if (s == FALSE)
status = FALSE;
- }
free(nextFile);
+//#define RECURSE_RESULT_ABORT -1
+// if (s == RECURSE_RESULT_ABORT) {
+// closedir(dir);
+// return s;
+// }
}
closedir(dir);
- if ((flags & ACTION_DEPTHFIRST) &&
- !dirAction(fileName, &statbuf, userData, depth)) {
+
+ if (flags & ACTION_DEPTHFIRST) {
+ if (!dirAction(fileName, &statbuf, userData, depth))
goto done_nak_warn;
}
- if (!status)
- return FALSE;
- return TRUE;
-done_nak_warn:
- bb_perror_msg("%s", fileName);
+ return status;
+
+ done_nak_warn:
+ if (!(flags & ACTION_QUIET))
+ bb_simple_perror_msg(fileName);
return FALSE;
}
projects / oweals / busybox.git / blobdiff