From 51b4c92f80dc232b9d34985f99a4479393644433 Mon Sep 17 00:00:00 2001
From: Denis Vlasenko
Date: Fri, 27 Oct 2006 16:07:20 +0000
Subject: chown: add -vcf support if CONFIG_DESKTOP chmod: stop following
 symlinks

---
 coreutils/chown.c | 58 ++++++++++++++++++++++++++++++++++++-------------------
 1 file changed, 38 insertions(+), 20 deletions(-)

(limited to 'coreutils/chown.c')

diff --git a/coreutils/chown.c b/coreutils/chown.c
index 42f973f..bef89ce 100644
--- a/coreutils/chown.c
+++ b/coreutils/chown.c
@@ -7,14 +7,10 @@
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
-/* BB_AUDIT SUSv3 defects - unsupported options -h, -H, -L, and -P. */
-/* BB_AUDIT GNU defects - unsupported options -h, -c, -f, -v, and long options. */
-/* BB_AUDIT Note: gnu chown does not support -H, -L, or -P. */
+/* BB_AUDIT SUSv3 defects - unsupported options -H, -L, and -P. */
+/* BB_AUDIT GNU defects - unsupported long options. */
 /* http://www.opengroup.org/onlinepubs/007904975/utilities/chown.html */
 
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
 #include "busybox.h"
 
 static uid_t uid = -1;
@@ -22,39 +18,55 @@ static gid_t gid = -1;
 
 static int (*chown_func)(const char *, uid_t, gid_t) = chown;
 
+#define OPT_RECURSE (option_mask32 & 1)
+#define OPT_NODEREF (option_mask32 & 2)
+#define OPT_VERBOSE (USE_DESKTOP(option_mask32 & 4) SKIP_DESKTOP(0))
+#define OPT_CHANGED (USE_DESKTOP(option_mask32 & 8) SKIP_DESKTOP(0))
+#define OPT_QUIET   (USE_DESKTOP(option_mask32 & 0x10) SKIP_DESKTOP(0))
+#define OPT_STR     ("Rh" USE_DESKTOP("vcf"))
+
+/* TODO:
+ * -H if a command line argument is a symbolic link to a directory, traverse it
+ * -L traverse every symbolic link to a directory encountered
+ * -P do not traverse any symbolic links (default)
+ */
+
 static int fileAction(const char *fileName, struct stat *statbuf,
 		void ATTRIBUTE_UNUSED *junk)
 {
+	// TODO: -H/-L/-P
+	// if (depth ... && S_ISLNK(statbuf->st_mode)) ....
+
 	if (!chown_func(fileName,
 				(uid == (uid_t)-1) ? statbuf->st_uid : uid,
 				(gid == (gid_t)-1) ? statbuf->st_gid : gid)) {
+		if (OPT_VERBOSE
+		 || (OPT_CHANGED && (statbuf->st_uid != uid || statbuf->st_gid != gid))
+		) {
+			printf("changed ownership of '%s' to %u:%u\n", fileName, uid, gid);
+		}
 		return TRUE;
 	}
-	bb_perror_msg("%s", fileName);	/* A filename can have % in it... */
+	if (!OPT_QUIET)
+		bb_perror_msg("%s", fileName);	/* A filename can have % in it... */
 	return FALSE;
 }
 
-#define FLAG_R 1
-#define FLAG_h 2
-
 int chown_main(int argc, char **argv)
 {
-	int flags;
 	int retval = EXIT_SUCCESS;
 	char *groupName;
 
-	flags = getopt32(argc, argv, "Rh");
+	opt_complementary = "-2";
+	getopt32(argc, argv, OPT_STR);
 
-	if (flags & FLAG_h) chown_func = lchown;
-
-	if (argc - optind < 2) {
-		bb_show_usage();
-	}
+	if (OPT_NODEREF) chown_func = lchown;
 
 	argv += optind;
 
 	/* First, check if there is a group name here */
-	if ((groupName = strchr(*argv, '.')) == NULL) {
+	groupName = strchr(*argv, '.');
+	if (!groupName) {
 		groupName = strchr(*argv, ':');
 	}
 
@@ -68,8 +80,14 @@ int chown_main(int argc, char **argv)
 
 	/* Ok, ready to do the deed now */
 	do {
-		if (! recursive_action (*argv, (flags & FLAG_R), FALSE, FALSE,
-								fileAction, fileAction, NULL)) {
+		if (!recursive_action(*argv,
+				OPT_RECURSE,	// recurse
+				FALSE,          // follow links: TODO: -H/-L/-P
+				FALSE,          // depth first
+				fileAction,     // file action
+				fileAction,     // dir action
+				NULL)           // user data
+		) {
 			retval = EXIT_FAILURE;
 		}
 	} while (*++argv);
-- 
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