Aggiornamento note copyright

[gapil.git] / sources / mylschroot.c

diff --git a/sources/mylschroot.c b/sources/mylschroot.c
index 9d4d705af845483aa0cfbf06ef4b082c4d367f11..f82e2f99928212e434a089bc5b5631741b342dee 100644 (file)
--- a/sources/mylschroot.c
+++ b/sources/mylschroot.c
@@ -18,39 +18,43 @@
  */
 /*****************************************************************************
  *
- * File myls.c: An example ls done after a chroot
+ * File mylschroot.c: An example ls done after a chroot
+ * List files and their size inside a given directory inside a chroot
  *
  * Author: S. Piccardi Mar. 2005
  *
- * $Id$
- *
  *****************************************************************************/
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <dirent.h>        /* directory */
-#include <stdlib.h>        /* C standard library */
-#include <unistd.h>
+/* 
+ * Include needed headers
+ */
+#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 myls
- *
- * List files and their size inside a given directory
+
+/* 
+ * Function and globals definitions
  */
-/* Help printing routine */
-void usage(void);
-/* computation function for DirScan */
-int do_ls(struct dirent * direntry);
+void usage(void);                     /* Help printing routine */
+int do_ls(struct dirent * direntry);  /* computation function for dir_scan */
 
+/*
+ * Main program
+ */
 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, "hs:l:wrbf")) != -1) {
+    while ( (i = getopt(argc, argv, "h")) != -1) {
        switch (i) {
        /* 
         * Handling options 
@@ -78,15 +82,26 @@ int main(int argc, char *argv[])
        printf("Wrong number of arguments %d\n", argc - optind);
         usage();
     }
+
     printf("Chrooting to %s\n", argv[1]);
     if (chroot(argv[1])) {
        perror("Chroot fail");
     }
-    DirScan("/", do_ls);
+
+    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);
+    }
+    dir_scan("/", do_ls);
+
     exit(0);
 }
 /*
- * Routine to print file name and size inside DirScan
+ * Routine to print file name and size inside dir_scan
  */
 int do_ls(struct dirent * direntry) 
 {
@@ -99,7 +114,7 @@ int do_ls(struct dirent * direntry)
  * routine to print usage info and exit
  */
 void usage(void) {
-    printf("Program myls: list file in a directory \n");
+    printf("Program mylschroot: chroot in a directory and list files \n");
     printf("Usage:\n");
     printf("  myls [-h] dirname \n");
     printf("  -h          print this help\n");