[Toybox] [patch] stat - support %C format

[Hyejin Kim]

Hi.

For smack feature, stat command also needs %C format as before jose
mentioned.
So, added it with lsm_ API.

plz, have a look.



 toys/other/stat.c | 30 +++++++++++++++++++++++-------
 1 file changed, 23 insertions(+), 7 deletions(-)
diff --git a/toys/other/stat.c b/toys/other/stat.c
index d6db44d..e305c28 100644
--- a/toys/other/stat.c
+++ b/toys/other/stat.c
@@ -15,7 +15,13 @@ config STAT
     -f display filesystem status instead of file status
     -c Output specified FORMAT string instead of default

-    The valid format escape sequences for files:
+    The valid format escape sequences for filesystems:
+    %a  Available blocks    |%b  Total blocks       |%c  Total inodes
+    %d  Free inodes         |%f  Free blocks        |%i  File system ID
+    %l  Max filename length |%n  File name          |%s  Fragment size
+    %S  Best transfer size  |%t  File system type
+
+ The valid format escape sequences for files:
     %a  Access bits (octal) |%A  Access bits (flags)|%b  Blocks allocated
     %B  Bytes per block     |%d  Device ID (dec)    |%D  Device ID (hex)
     %f  All mode bits (hex) |%F  File type          |%g  Group ID
@@ -25,12 +31,15 @@ config STAT
     %x  Access time         |%X  Access unix time   |%y  File write time
     %Y  File write unix time|%z  Dir change time    |%Z  Dir change unix
time

-    The valid format escape sequences for filesystems:
-    %a  Available blocks    |%b  Total blocks       |%c  Total inodes
-    %d  Free inodes         |%f  Free blocks        |%i  File system ID
-    %l  Max filename length |%n  File name          |%s  Fragment size
-    %S  Best transfer size  |%t  File system type
-*/
+config STAT_C
+  bool
+  default y
+  depends on STAT && !TOYBOX_LSM_NONE
+  help
+    usage: stat
+
+    %C  Security context
+ */

 #define FOR_stat
 #include "toys.h"
@@ -70,6 +79,13 @@ static void print_stat(char type)
     xprintf("%s", str);
   } else if (type == 'b') xprintf("%llu", stat->st_blocks);
   else if (type == 'B') xprintf("%lu", stat->st_blksize);
+  else if (CFG_STAT_C && type == 'C') {
+    char *label = NULL;
+ if ((lsm_lget_context(*toys.optargs, (char **)&label) > 0) && label) {
+      xprintf("%s", label);
+   free(label);
+ }
+  }
   else if (type == 'd') xprintf("%ldd", stat->st_dev);
   else if (type == 'D') xprintf("%llxh", stat->st_dev);
   else if (type == 'f') xprintf("%lx", stat->st_mode);
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