+/* cap_print.c
+ *
+ * Copyright (C) 2005 Simone Piccardi
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/*****************************************************************************
+ *
+ * File cap_print.c: An example for capabilities print
+ *
+ * Author: S. Piccardi Dec. 2005
+ *
+ *****************************************************************************/
+#include <stdlib.h> /* C standard library */
+#include <stdio.h> /* I/O standard library */
+#include <unistd.h>
+#include <sys/capability.h>
+
+/*
+ * Program cap_print
+ *
+ * Use libcap2 functions and print results
+ */
+/* Help printing routine */
+void usage(void);
+
+int main(int argc, char *argv[])
+{
+ /*
+ * Variables definition
+ */
+ int i;
+ cap_t capstatus;
+ cap_flag_t capset=CAP_EFFECTIVE;
+ cap_flag_value_t capval;
+ cap_value_t capability;
+ char * buffer;
+ /*
+ * Input section: decode command line parameters
+ * Use getopt function
+ */
+ opterr = 0; /* don't want writing to stderr */
+ while ( (i = getopt(argc, argv, "hepi")) != -1) {
+ switch (i) {
+ /*
+ * Handling options
+ */
+ case 'i': /* read inherited set */
+ capset=CAP_INHERITABLE;
+ break;
+ case 'e': /* read effective set */
+ capset=CAP_EFFECTIVE;
+ break;
+ case 'p': /* read permitted set */
+ capset=CAP_PERMITTED;
+ break;
+ case 'h': /* help option */
+ printf("Wrong -h option use\n");
+ usage();
+ return -1;
+ break;
+ case '?': /* unrecognized options */
+ printf("Unrecognized options -%c\n",optopt);
+ usage();
+ default: /* should not reached */
+ usage();
+ }
+ }
+ /* ***********************************************************
+ *
+ * Options processing completed
+ *
+ * Main code beginning
+ *
+ * ***********************************************************/
+ if ((argc - optind) != 0) {
+ printf("Wrong number of arguments %d\n", argc - optind);
+ usage();
+ }
+ if ( (capstatus = cap_get_proc()) == NULL) {
+ perror("Lettura delle capabilities fallita");
+ }
+ if ( (buffer = cap_to_text(capstatus, NULL)) == NULL) {
+ perror("Cannot convert capability status:");
+ }
+ printf("Capabilities:\n %s\n", buffer);
+ exit(0);
+}
+/*
+ * routine to print usage info and exit
+ */
+void usage(void) {
+ printf("Program mygethost: do an hostname resolution \n");
+ printf("Usage:\n");
+ printf(" mygethost [-h] hostname \n");
+ printf(" -h print this help\n");
+ exit(1);
+}