busybox: 1.15.1 find fix

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/busybox/busybox-1.15.1-find.patch

@@ -0,0 +1,230 @@
+diff -urpN busybox-1.15.1/findutils/find.c busybox-1.15.1-find/findutils/find.c
+--- busybox-1.15.1/findutils/find.c	2009-09-12 17:55:58.000000000 +0200
++++ busybox-1.15.1-find/findutils/find.c	2009-09-30 02:23:54.000000000 +0200
+@@ -62,9 +62,6 @@
+ /* This is a NOEXEC applet. Be very careful! */
+ 
+ 
+-IF_FEATURE_FIND_XDEV(static dev_t *xdev_dev;)
+-IF_FEATURE_FIND_XDEV(static int xdev_count;)
+-
+ typedef int (*action_fp)(const char *fileName, struct stat *statbuf, void *) FAST_FUNC;
+ 
+ typedef struct {
+@@ -100,9 +97,24 @@ IF_FEATURE_FIND_DELETE( ACTS(delete))
+ IF_FEATURE_FIND_EXEC(   ACTS(exec,  char **exec_argv; unsigned *subst_count; int exec_argc;))
+ IF_FEATURE_FIND_GROUP(  ACTS(group, gid_t gid;))
+ 
+-static action ***actions;
+-static bool need_print = 1;
+-static int recurse_flags = ACTION_RECURSE;
++struct globals {
++	IF_FEATURE_FIND_XDEV(dev_t *xdev_dev;)
++	IF_FEATURE_FIND_XDEV(int xdev_count;)
++	action ***actions;
++	bool need_print;
++	recurse_flags_t recurse_flags;
++};
++#define G (*(struct globals*)&bb_common_bufsiz1)
++#define INIT_G() do { \
++	struct G_sizecheck { \
++		char G_sizecheck[sizeof(G) > COMMON_BUFSIZE ? -1 : 1]; \
++	}; \
++	G.xdev_dev = NULL; \
++	G.xdev_count = 0; \
++	G.actions = NULL; \
++	G.need_print = 1; \
++	G.recurse_flags = ACTION_RECURSE; \
++} while (0)
+ 
+ #if ENABLE_FEATURE_FIND_EXEC
+ static unsigned count_subst(const char *str)
+@@ -363,7 +375,7 @@ ACTF(context)
+ 	security_context_t con;
+ 	int rc;
+ 
+-	if (recurse_flags & ACTION_FOLLOWLINKS) {
++	if (G.recurse_flags & ACTION_FOLLOWLINKS) {
+ 		rc = getfilecon(fileName, &con);
+ 	} else {
+ 		rc = lgetfilecon(fileName, &con);
+@@ -392,18 +404,18 @@ static int FAST_FUNC fileAction(const ch
+ #endif
+ 
+ #if ENABLE_FEATURE_FIND_XDEV
+-	if (S_ISDIR(statbuf->st_mode) && xdev_count) {
+-		for (i = 0; i < xdev_count; i++) {
+-			if (xdev_dev[i] == statbuf->st_dev)
++	if (S_ISDIR(statbuf->st_mode) && G.xdev_count) {
++		for (i = 0; i < G.xdev_count; i++) {
++			if (G.xdev_dev[i] == statbuf->st_dev)
+ 				break;
+ 		}
+-		if (i == xdev_count)
++		if (i == G.xdev_count)
+ 			return SKIP;
+ 	}
+ #endif
+-	i = exec_actions(actions, fileName, statbuf);
++	i = exec_actions(G.actions, fileName, statbuf);
+ 	/* Had no explicit -print[0] or -exec? then print */
+-	if ((i & TRUE) && need_print)
++	if ((i & TRUE) && G.need_print)
+ 		puts(fileName);
+ 	/* Cannot return 0: our caller, recursive_action(),
+ 	 * will perror() and skip dirs (if called on dir) */
+@@ -431,7 +443,7 @@ static int find_type(const char *type)
+ 	else if (*type == 's')
+ 		mask = S_IFSOCK;
+ 
+-	if (mask == 0 || *(type + 1) != '\0')
++	if (mask == 0 || type[1] != '\0')
+ 		bb_error_msg_and_die(bb_msg_invalid_arg, type, "-type");
+ 
+ 	return mask;
+@@ -592,21 +604,21 @@ static action*** parse_params(char **arg
+ 
+ 	/* --- Tests and actions --- */
+ 		else if (parm == PARM_print) {
+-			need_print = 0;
++			G.need_print = 0;
+ 			/* GNU find ignores '!' here: "find ! -print" */
+ 			IF_FEATURE_FIND_NOT( invert_flag = 0; )
+ 			(void) ALLOC_ACTION(print);
+ 		}
+ #if ENABLE_FEATURE_FIND_PRINT0
+ 		else if (parm == PARM_print0) {
+-			need_print = 0;
++			G.need_print = 0;
+ 			IF_FEATURE_FIND_NOT( invert_flag = 0; )
+ 			(void) ALLOC_ACTION(print0);
+ 		}
+ #endif
+ #if ENABLE_FEATURE_FIND_DEPTH
+ 		else if (parm == PARM_depth) {
+-			recurse_flags |= ACTION_DEPTHFIRST;
++			G.recurse_flags |= ACTION_DEPTHFIRST;
+ 		}
+ #endif
+ #if ENABLE_FEATURE_FIND_PRUNE
+@@ -617,8 +629,8 @@ static action*** parse_params(char **arg
+ #endif
+ #if ENABLE_FEATURE_FIND_DELETE
+ 		else if (parm == PARM_delete) {
+-			need_print = 0;
+-			recurse_flags |= ACTION_DEPTHFIRST;
++			G.need_print = 0;
++			G.recurse_flags |= ACTION_DEPTHFIRST;
+ 			(void) ALLOC_ACTION(delete);
+ 		}
+ #endif
+@@ -626,7 +638,7 @@ static action*** parse_params(char **arg
+ 		else if (parm == PARM_exec) {
+ 			int i;
+ 			action_exec *ap;
+-			need_print = 0;
++			G.need_print = 0;
+ 			IF_FEATURE_FIND_NOT( invert_flag = 0; )
+ 			ap = ALLOC_ACTION(exec);
+ 			ap->exec_argv = ++argv; /* first arg after -exec */
+@@ -834,6 +846,8 @@ IF_FEATURE_FIND_MAXDEPTH(OPT_MINDEPTH,)
+ #define minmaxdepth NULL
+ #endif
+ 
++	INIT_G();
++
+ 	for (firstopt = 1; firstopt < argc; firstopt++) {
+ 		if (argv[firstopt][0] == '-')
+ 			break;
+@@ -861,21 +875,21 @@ IF_FEATURE_FIND_MAXDEPTH(OPT_MINDEPTH,)
+ 	while ((arg = argp[0])) {
+ 		int opt = index_in_strings(options, arg);
+ 		if (opt == OPT_FOLLOW) {
+-			recurse_flags |= ACTION_FOLLOWLINKS;
++			G.recurse_flags |= ACTION_FOLLOWLINKS | ACTION_DANGLING_OK;
+ 			argp[0] = (char*)"-a";
+ 		}
+ #if ENABLE_FEATURE_FIND_XDEV
+ 		if (opt == OPT_XDEV) {
+ 			struct stat stbuf;
+-			if (!xdev_count) {
+-				xdev_count = firstopt - 1;
+-				xdev_dev = xmalloc(xdev_count * sizeof(dev_t));
++			if (!G.xdev_count) {
++				G.xdev_count = firstopt - 1;
++				G.xdev_dev = xmalloc(G.xdev_count * sizeof(dev_t));
+ 				for (i = 1; i < firstopt; i++) {
+ 					/* not xstat(): shouldn't bomb out on
+ 					 * "find not_exist exist -xdev" */
+ 					if (stat(argv[i], &stbuf))
+ 						stbuf.st_dev = -1L;
+-					xdev_dev[i-1] = stbuf.st_dev;
++					G.xdev_dev[i-1] = stbuf.st_dev;
+ 				}
+ 			}
+ 			argp[0] = (char*)"-a";
+@@ -894,11 +908,11 @@ IF_FEATURE_FIND_MAXDEPTH(OPT_MINDEPTH,)
+ 		argp++;
+ 	}
+ 
+-	actions = parse_params(&argv[firstopt]);
++	G.actions = parse_params(&argv[firstopt]);
+ 
+ 	for (i = 1; i < firstopt; i++) {
+ 		if (!recursive_action(argv[i],
+-				recurse_flags,  /* flags */
++				G.recurse_flags,/* flags */
+ 				fileAction,     /* file action */
+ 				fileAction,     /* dir action */
+ #if ENABLE_FEATURE_FIND_MAXDEPTH
+diff -urpN busybox-1.15.1/include/libbb.h busybox-1.15.1-find/include/libbb.h
+--- busybox-1.15.1/include/libbb.h	2009-09-12 17:55:58.000000000 +0200
++++ busybox-1.15.1-find/include/libbb.h	2009-09-30 02:20:21.000000000 +0200
+@@ -286,7 +286,9 @@ enum {
+ 	ACTION_DEPTHFIRST     = (1 << 3),
+ 	/*ACTION_REVERSE      = (1 << 4), - unused */
+ 	ACTION_QUIET          = (1 << 5),
++	ACTION_DANGLING_OK    = (1 << 6),
+ };
++typedef uint8_t recurse_flags_t;
+ extern int 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),
+diff -urpN busybox-1.15.1/libbb/recursive_action.c busybox-1.15.1-find/libbb/recursive_action.c
+--- busybox-1.15.1/libbb/recursive_action.c	2009-09-12 17:55:36.000000000 +0200
++++ busybox-1.15.1-find/libbb/recursive_action.c	2009-09-30 02:20:21.000000000 +0200
+@@ -61,6 +61,7 @@ int FAST_FUNC recursive_action(const cha
+ 		unsigned depth)
+ {
+ 	struct stat statbuf;
++	unsigned follow;
+ 	int status;
+ 	DIR *dir;
+ 	struct dirent *next;
+@@ -68,14 +69,22 @@ int FAST_FUNC recursive_action(const cha
+ 	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);
++	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 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;
+ 	}
+