[PATCH 7/8] busybox -- SELinux option support for coreutils: ver3

[Denis Vlasenko]

On Friday 23 February 2007 09:48, Yuichi Nakamura wrote:
> [7/8] busybox-coreutils-07-chcon.v3.patch
>  - chcon - change security context of file. 
> 
> Signed-off-by: KaiGai Kohei <kaigai at kaigai.gr.jp>

+#define OPT_QUIET              (1<<3)  /* 'f' */
+#define OPT_REFERENCE          (1<<4)  /* '\n' */
+#define OPT_USER               (1<<5)  /* 'u' */

...


+       {"quiet",       0,      NULL,   'f'},
+       {"reference",   1,      NULL,   '\n' }, /* no short option */
+       {"user",        1,      NULL,   'u' },
+       {"role",        1,      NULL,   'r' },
+       {"type",        1,      NULL,   't' },
+       {"range",       1,      NULL,   'l' },
+       {"verbose",     0,      NULL,   'v' },
+       {NULL,          0,      NULL,   0 },
+};
+#endif
+
+int chcon_main(int argc, char *argv[]);
+int chcon_main(int argc, char *argv[])
+{
+       char *reference_file;
+       char **target_files;
+       int i, opts, errors = 0;
+
+#ifdef CONFIG_FEATURE_CHCON_LONG_OPTIONS
+       applet_long_options = chcon_options;
+#endif
+       opt_complementary = "-1"  /* at least 1 param */
+               ":q--v:v--q";     /* 'verbose' and 'quiet' are exclusive */
+       opts = getopt32(argc, argv, "Rchf\n:u:r:t:l:v",
+                       &reference_file, &user, &role, &type, &range);
+       if (opts & OPT_REFERENCE) {
+               if (opts & OPT_COMPONENT_SPECIFIED)
+                       bb_error_msg_and_die("conflicting security context specifiers given");


Again see wget.c how to not pass '\n' to getopt32.

You can make OPT_REFERENCE and OPT_COMPONENT_SPECIFIED
exclusive by using suitable opt_complementary.
--
vda