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authorGravatar Pascal Bellard <pascal.bellard@ads-lu.com>2014-06-30 13:06:39 +0200
committerGravatar Denys Vlasenko <vda.linux@googlemail.com>2014-06-30 13:06:39 +0200
commitd3633b7e9c5dae78343a8552f54b0efa61074380 (patch)
treea7ea3a117b6abd54713ea6b15f7ace84b6e3b740 /util-linux
parenta9dc7c2f59dc5e92870d2d46316ea5c1f14740e3 (diff)
downloadbusybox-d3633b7e9c5dae78343a8552f54b0efa61074380.tar.gz
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fatattr: new applet
function old new delta fatattr_main - 281 +281 packed_usage 29821 29871 +50 bit_to_char - 10 +10 applet_names 2472 2480 +8 applet_main 1436 1440 +4 applet_nameofs 718 720 +2 ------------------------------------------------------------------------------ (add/remove: 3/0 grow/shrink: 4/0 up/down: 355/0) Total: 355 bytes Signed-off-by: Pascal Bellard <pascal.bellard@ads-lu.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'util-linux')
-rw-r--r--util-linux/fatattr.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/util-linux/fatattr.c b/util-linux/fatattr.c
new file mode 100644
index 000000000..0f8d63268
--- /dev/null
+++ b/util-linux/fatattr.c
@@ -0,0 +1,104 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Display or change file attributes on a fat file system
+ *
+ * Copyright 2005 H. Peter Anvin
+ * Busybox'ed (2014) by Pascal Bellard <pascal.bellard@ads-lu.com>
+ *
+ * This file can be redistributed under the terms of the GNU General
+ * Public License
+ */
+//config:config FATATTR
+//config: bool "fatattr"
+//config: default y
+//config: select PLATFORM_LINUX
+//config: help
+//config: fatattr lists or changes the file attributes on a fat file system.
+
+//applet:IF_FATATTR(APPLET(fatattr, BB_DIR_BIN, BB_SUID_DROP))
+//kbuild:lib-$(CONFIG_FATATTR) += fatattr.o
+
+//usage:#define fatattr_trivial_usage
+//usage: "[-+rhsvda] FILE..."
+//usage:#define fatattr_full_usage "\n\n"
+//usage: "Change file attributes on FAT filesystem\n"
+//usage: "\n - Clear attributes"
+//usage: "\n + Set attributes"
+//usage: "\n r Read only"
+//usage: "\n h Hidden"
+//usage: "\n s System"
+//usage: "\n v Volume label"
+//usage: "\n d Directory"
+//usage: "\n a Archive"
+
+#include "libbb.h"
+/* linux/msdos_fs.h says: */
+#ifndef FAT_IOCTL_GET_ATTRIBUTES
+# define FAT_IOCTL_GET_ATTRIBUTES _IOR('r', 0x10, __u32)
+# define FAT_IOCTL_SET_ATTRIBUTES _IOW('r', 0x11, __u32)
+#endif
+
+/* Currently supports only the FAT flags, not the NTFS ones.
+ * Extra space at the end is a hack to print space separator in file listing.
+ * Let's hope no one ever passes space as an option char :)
+ */
+static const char bit_to_char[] = "rhsvda67 ";
+
+static inline unsigned long get_flag(char c)
+{
+ const char *fp = strchr(bit_to_char, c);
+ if (!fp)
+ bb_error_msg_and_die("invalid character '%c'", c);
+ return 1 << (fp - bit_to_char);
+}
+
+static unsigned decode_arg(const char *arg)
+{
+ unsigned fl = 0;
+ while (*++arg)
+ fl |= get_flag(*arg);
+ return fl;
+}
+
+int fatattr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int fatattr_main(int argc UNUSED_PARAM, char **argv)
+{
+ unsigned set_mask = 0;
+ unsigned clear_mask = 0;
+
+ for (;;) {
+ unsigned fl;
+ char *arg = *++argv;
+
+ if (!arg)
+ bb_show_usage();
+ if (arg[0] != '-' && arg[0] != '+')
+ break;
+ fl = decode_arg(arg);
+ if (arg[0] == '+')
+ set_mask |= fl;
+ else
+ clear_mask |= fl;
+ }
+
+ do {
+ int fd, i;
+ uint32_t attr;
+
+ fd = xopen(*argv, O_RDONLY);
+ xioctl(fd, FAT_IOCTL_GET_ATTRIBUTES, &attr);
+ attr = (attr | set_mask) & ~clear_mask;
+ if (set_mask | clear_mask)
+ xioctl(fd, FAT_IOCTL_SET_ATTRIBUTES, &attr);
+ else {
+ for (i = 0; bit_to_char[i]; i++) {
+ bb_putchar((attr & 1) ? bit_to_char[i] : ' ');
+ attr >>= 1;
+ }
+ puts(*argv);
+ }
+ close(fd);
+ } while (*++argv);
+
+ return EXIT_SUCCESS;
+}