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Diffstat (limited to 'libbb')
-rw-r--r--libbb/recursive_action.c40
1 files changed, 24 insertions, 16 deletions
diff --git a/libbb/recursive_action.c b/libbb/recursive_action.c
index 0d6567dda..ddaf9b896 100644
--- a/libbb/recursive_action.c
+++ b/libbb/recursive_action.c
@@ -11,7 +11,6 @@
#undef DEBUG_RECURS_ACTION
-
/*
* Walk down all the directories under the specified
* location, and do something (something specified
@@ -23,16 +22,23 @@
* is so stinking huge.
*/
-static int true_action(const char *fileName, struct stat *statbuf, void* userData)
+static int true_action(const char *fileName, struct stat *statbuf, void* userData, int depth)
{
return TRUE;
}
+/*
+ * 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 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)
+ int (*fileAction)(const char *fileName, struct stat *statbuf, void* userData, int depth),
+ int (*dirAction)(const char *fileName, struct stat *statbuf, void* userData, int depth),
+ void* userData,
+ int depth)
{
struct stat statbuf;
int status;
@@ -53,21 +59,23 @@ int recursive_action(const char *fileName,
return FALSE;
}
- if (!followLinks && (S_ISLNK(statbuf.st_mode))) {
- 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 ( /* (!followLinks && S_ISLNK(statbuf.st_mode)) || */
+ !S_ISDIR(statbuf.st_mode)
+ ) {
+ return fileAction(fileName, &statbuf, userData, depth);
}
+ /* It's a directory (or a link to one, and followLinks is set) */
+
if (!recurse) {
- if (S_ISDIR(statbuf.st_mode)) {
- return dirAction(fileName, &statbuf, userData);
- }
+ return dirAction(fileName, &statbuf, userData, depth);
}
- if (!S_ISDIR(statbuf.st_mode))
- return fileAction(fileName, &statbuf, userData);
-
if (!depthFirst) {
- status = dirAction(fileName, &statbuf, userData);
+ status = dirAction(fileName, &statbuf, userData, depth);
if (!status) {
bb_perror_msg("%s", fileName);
return FALSE;
@@ -88,14 +96,14 @@ int recursive_action(const char *fileName,
if (nextFile == NULL)
continue;
if (!recursive_action(nextFile, TRUE, followLinks, depthFirst,
- fileAction, dirAction, userData)) {
+ fileAction, dirAction, userData, depth+1)) {
status = FALSE;
}
free(nextFile);
}
closedir(dir);
if (depthFirst) {
- if (!dirAction(fileName, &statbuf, userData)) {
+ if (!dirAction(fileName, &statbuf, userData, depth)) {
bb_perror_msg("%s", fileName);
return FALSE;
}