* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-#include <stdio.h>
-#include <string.h>
-#include <dirent.h>
-#include <sys/stat.h>
-#include <stdlib.h> /* free() */
#include "libbb.h"
#undef DEBUG_RECURS_ACTION
-
/*
* Walk down all the directories under the specified
* location, and do something (something specified
* and so isn't sufficiently portable to take over since glibc2.1
* is so stinking huge.
*/
-int recursive_action(const char *fileName,
- int recurse, int followLinks, int depthFirst,
- int (*fileAction) (const char *fileName,
- struct stat * statbuf,
- void* userData),
- int (*dirAction) (const char *fileName,
- struct stat * statbuf,
- void* userData),
- void* userData)
+
+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
+ * (fileAction/dirAction will be called on each file).
+ *
+ * If !ACTION_RECURSE, dirAction is called on the directory and its
+ * return value is returned from recursive_action(). No recursion.
+ *
+ * If ACTION_RECURSE, recursive_action() is called on each directory.
+ * If any one of these calls returns 0, current recursive_action() returns 0.
+ *
+ * If ACTION_DEPTHFIRST, dirAction is called after recurse.
+ * If it returns 0, the warning is printed and recursive_action() returns 0.
+ *
+ * If !ACTION_DEPTHFIRST, dirAction is called before we recurse.
+ * Return value of 0 (FALSE) or 2 (SKIP) prevents recursion
+ * into that directory, instead recursive_action() returns 0 (if FALSE)
+ * or 1 (if SKIP)
+ *
+ * followLinks=0/1 differs mainly in 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 FAST_FUNC recursive_action(const char *fileName,
+ unsigned flags,
+ 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,
+ unsigned depth)
{
- int status;
struct stat statbuf;
+ int status;
+ DIR *dir;
struct dirent *next;
- if (followLinks)
- status = stat(fileName, &statbuf);
- else
- status = lstat(fileName, &statbuf);
+ if (!fileAction) fileAction = true_action;
+ if (!dirAction) dirAction = true_action;
+ status = ACTION_FOLLOWLINKS; /* hijack a variable for bitmask... */
+ if (!depth)
+ status = ACTION_FOLLOWLINKS | ACTION_FOLLOWLINKS_L0;
+ status = ((flags & status) ? stat : lstat)(fileName, &statbuf);
if (status < 0) {
#ifdef DEBUG_RECURS_ACTION
- bb_error_msg("status=%d followLinks=%d TRUE=%d",
- status, followLinks, TRUE);
+ bb_error_msg("status=%d flags=%x", status, flags);
#endif
- bb_perror_msg("%s", fileName);
- return FALSE;
+ goto done_nak_warn;
}
- if (! followLinks && (S_ISLNK(statbuf.st_mode))) {
- if (fileAction == NULL)
- return TRUE;
- else
- return fileAction(fileName, &statbuf, userData);
+ /* If S_ISLNK(m), then we know that !S_ISDIR(m).
+ * Then we can skip checking first part: if it is true, then
+ * (!dir) is also true! */
+ if ( /* (!(flags & ACTION_FOLLOWLINKS) && S_ISLNK(statbuf.st_mode)) || */
+ !S_ISDIR(statbuf.st_mode)
+ ) {
+ return fileAction(fileName, &statbuf, userData, depth);
}
- if (! recurse) {
- if (S_ISDIR(statbuf.st_mode)) {
- if (dirAction != NULL)
- return (dirAction(fileName, &statbuf, userData));
- else
- return TRUE;
- }
+ /* It's a directory (or a link to one, and followLinks is set) */
+
+ if (!(flags & ACTION_RECURSE)) {
+ return dirAction(fileName, &statbuf, userData, depth);
}
- if (S_ISDIR(statbuf.st_mode)) {
- DIR *dir;
-
- if (dirAction != NULL && ! depthFirst) {
- status = dirAction(fileName, &statbuf, userData);
- if (! status) {
- bb_perror_msg("%s", fileName);
- return FALSE;
- } else if (status == SKIP)
- return TRUE;
- }
- dir = bb_opendir(fileName);
- if (!dir) {
- return FALSE;
- }
- status = TRUE;
- while ((next = readdir(dir)) != NULL) {
- char *nextFile;
-
- nextFile = concat_subpath_file(fileName, next->d_name);
- if(nextFile == NULL)
- continue;
- if (! recursive_action(nextFile, TRUE, followLinks, depthFirst,
- fileAction, dirAction, userData)) {
- status = FALSE;
- }
- free(nextFile);
- }
- closedir(dir);
- if (dirAction != NULL && depthFirst) {
- if (! dirAction(fileName, &statbuf, userData)) {
- bb_perror_msg("%s", fileName);
- return FALSE;
- }
- }
- if (! status)
- return FALSE;
- } else {
- if (fileAction == NULL)
+ if (!(flags & ACTION_DEPTHFIRST)) {
+ status = dirAction(fileName, &statbuf, userData, depth);
+ if (!status)
+ goto done_nak_warn;
+ if (status == SKIP)
return TRUE;
- else
- return fileAction(fileName, &statbuf, userData);
}
- return TRUE;
+
+ dir = opendir(fileName);
+ if (!dir) {
+ /* findutils-4.1.20 reports this */
+ /* (i.e. it doesn't silently return with exit code 1) */
+ /* To trigger: "find -exec rm -rf {} \;" */
+ goto done_nak_warn;
+ }
+ status = TRUE;
+ while ((next = readdir(dir)) != NULL) {
+ char *nextFile;
+
+ nextFile = concat_subpath_file(fileName, next->d_name);
+ if (nextFile == NULL)
+ continue;
+ /* process every file (NB: ACTION_RECURSE is set in flags) */
+ if (!recursive_action(nextFile, flags, fileAction, dirAction,
+ userData, depth + 1))
+ status = FALSE;
+// s = recursive_action(nextFile, flags, fileAction, dirAction,
+// userData, depth + 1);
+ free(nextFile);
+//#define RECURSE_RESULT_ABORT 3
+// if (s == RECURSE_RESULT_ABORT) {
+// closedir(dir);
+// return s;
+// }
+// if (s == FALSE)
+// status = FALSE;
+ }
+ closedir(dir);
+
+ if (flags & ACTION_DEPTHFIRST) {
+ if (!dirAction(fileName, &statbuf, userData, depth))
+ goto done_nak_warn;
+ }
+
+ return status;
+
+ done_nak_warn:
+ if (!(flags & ACTION_QUIET))
+ bb_simple_perror_msg(fileName);
+ return FALSE;
}
projects / oweals / busybox.git / blobdiff