rimosse opzioni non usate e file rimasto indietro.

diff --git a/sources/mylschroot.c b/sources/mylschroot.c
index 56b3d63c9d2228ce0fb9e8d11a3cb6a069711fb4..13d93bb6316c36f70e730609f02e0101ce8fe8de 100644 (file)
--- a/sources/mylschroot.c
+++ b/sources/mylschroot.c
@@ -54,7 +54,7 @@ int main(int argc, char *argv[])
      * Use getopt function
      */
     opterr = 0;         /* don't want writing to stderr */
-    while ( (i = getopt(argc, argv, "hs:l:wrbf")) != -1) {
+    while ( (i = getopt(argc, argv, "h")) != -1) {
        switch (i) {
        /* 
         * Handling options 

diff --git a/sources/mylschrootout.c b/sources/mylschrootout.c
new file mode 100644 (file)
index 0000000..77ed860
--- /dev/null
+++ b/sources/mylschrootout.c
@@ -0,0 +1,120 @@
+/* mylschrootout.c
+ * 
+ * Copyright (C) 2007 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 myls.c: An example ls done after a chroot
+ *
+ * Author: S. Piccardi Apr. 2007
+ *
+ *****************************************************************************/
+#include <sys/types.h>   /* primitive system data types */
+#include <sys/stat.h>    /* file characteristics constants and functions */
+#include <dirent.h>      /* directory operation constants and functions */
+#include <stdlib.h>      /* C standard library */
+#include <unistd.h>      /* unix standard library */
+
+#include "Gapil.h"
+/*
+ * Program mylschrootout
+ *
+ * List files and their size inside exiting from a chroot
+ */
+/* Help printing routine */
+void usage(void);
+/* computation function for DirScan */
+int do_ls(struct dirent * direntry);
+
+int main(int argc, char *argv[]) 
+{
+    int i;
+    char * arg[]={"ls","-l", NULL};
+    struct stat data;
+    /*
+     * Input section: decode command line parameters 
+     * Use getopt function
+     */
+    opterr = 0;         /* don't want writing to stderr */
+    while ( (i = getopt(argc, argv, "h")) != -1) {
+       switch (i) {
+       /* 
+        * Handling options 
+        */ 
+       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) != 1) {          /* There must be remaing parameters */
+       printf("Wrong number of arguments %d\n", argc - optind);
+        usage();
+    }
+
+    printf("Chrooting to %s\n", argv[1]);
+    if (chroot(argv[1])) {
+       perror("Chroot fail");
+    }
+
+    if (execve("/ls", arg, NULL)) {
+       perror("errore in execve");
+    }
+    if (stat("/ls", &data)) {
+       perror("errore in stat");
+    } else {
+       printf("inode: %d\n", data.st_ino);
+    }
+    mkdir("escape", 0777);
+    chroot("escape");
+    DirScan("../", do_ls);
+
+    exit(0);
+}
+/*
+ * Routine to print file name and size inside DirScan
+ */
+int do_ls(struct dirent * direntry) 
+{
+    struct stat data;
+    stat(direntry->d_name, &data);                          /* get stat data */
+    printf("File: %s \t inode: %d\n", direntry->d_name, data.st_ino);
+    return 0;
+}
+/*
+ * routine to print usage info and exit
+ */
+void usage(void) {
+    printf("Program mylschrootout: chroot in a directory and list files \n");
+    printf("Usage:\n");
+    printf("  myls [-h] dirname \n");
+    printf("  -h          print this help\n");
+    exit(1);
+}