¡Esta es una revisión vieja del documento!
#!/usr/local/bin/bash # A really hacked together script - I don't even understand it anymore # Rm9yayAhQm9tYnpaeUNBawo= help() { cat <<'END' -q "quit at" n keypresses -l "length per typed character" default: 4 -f "fail at hacking" -s "succeed at hacking" -g "be green" -h "show this help..." Example: -l 20 -q 10 -f -g each keypress will output 20 characters this continues 10 times (10 keypresses before it ends) once it ends, it will fail all the text is green Also note that pressing ` will skip you straight to "hacking" (or failing) This code is quite messy, I might consider a cleanup later on (Try to use sane values for -q and -l) END exit } while getopts "q:l:fshg" opt "$@"; do case "$opt" in q) stopat=$OPTARG ;; l) len=$OPTARG ;; f) fail=1 ;; s) hack=1 ;; g) echo -e "\033[00;32m" ;; h) help ;; *) help ;; esac done hack() { for i in `seq 0 100`; do echo $i; sleep 0.05; done | whiptail --title "Hacking..." --clear --gauge " Hacking in progress, please wait" 20 70 0 whiptail --title "Hacking..." --msgbox ' Success.' 20 70 whiptail --title "Hacking..." --passwordbox "Enter Password?" 20 70 clear echo -en '\033[00;0mroot# ' sleep 5 echo "" exit } fail() { whiptail --title "Hacking..." --msgbox ' FAILED !!' 20 70 echo -e '\033[00;0m' # Just in case your $PS1 doesn't set colour clear exit } end() { if [ $fail ]; then fail else hack fi } text=`cat << 'ENDOFSTUFF' /* init to 2 - one for init_task, one to ensure it is never freed */ struct group_info init_groups = { .usage = ATOMIC_INIT(2) }; struct group_info *groups_alloc(int gidsetsize) { struct group_info *group_info; int nblocks; int i; nblocks = (gidsetsize + NGROUPS_PER_BLOCK - 1) / NGROUPS_PER_BLOCK; /* Make sure we always allocate at least one indirect block pointer */ nblocks = nblocks ? : 1; group_info = kmalloc(sizeof(*group_info) + nblocks*sizeof(gid_t *), GFP_USER); if (!group_info) return NULL; group_info->ngroups = gidsetsize; group_info->nblocks = nblocks; atomic_set(&group_info->usage, 1); if (gidsetsize <= NGROUPS_SMALL) group_info->blocks[0] = group_info->small_block; else { for (i = 0; i < nblocks; i++) { gid_t *b; b = (void *)__get_free_page(GFP_USER); if (!b) goto out_undo_partial_alloc; group_info->blocks[i] = b; } } return group_info; out_undo_partial_alloc: while (--i >= 0) { free_page((unsigned long)group_info->blocks[i]); } kfree(group_info); return NULL; } EXPORT_SYMBOL(groups_alloc); void groups_free(struct group_info *group_info) { if (group_info->blocks[0] != group_info->small_block) { int i; for (i = 0; i < group_info->nblocks; i++) free_page((unsigned long)group_info->blocks[i]); } kfree(group_info); } EXPORT_SYMBOL(groups_free); /* export the group_info to a user-space array */ static int groups_to_user(gid_t __user *grouplist, const struct group_info *group_info) { int i; unsigned int count = group_info->ngroups; for (i = 0; i < group_info->nblocks; i++) { unsigned int cp_count = min(NGROUPS_PER_BLOCK, count); unsigned int len = cp_count * sizeof(*grouplist); if (copy_to_user(grouplist, group_info->blocks[i], len)) return -EFAULT; grouplist += NGROUPS_PER_BLOCK; count -= cp_count; } return 0; } /* fill a group_info from a user-space array - it must be allocated already */ static int groups_from_user(struct group_info *group_info, gid_t __user *grouplist) { int i; unsigned int count = group_info->ngroups; for (i = 0; i < group_info->nblocks; i++) { unsigned int cp_count = min(NGROUPS_PER_BLOCK, count); unsigned int len = cp_count * sizeof(*grouplist); if (copy_from_user(group_info->blocks[i], grouplist, len)) return -EFAULT; grouplist += NGROUPS_PER_BLOCK; count -= cp_count; } return 0; } /* a simple Shell sort */ static void groups_sort(struct group_info *group_info) { int base, max, stride; int gidsetsize = group_info->ngroups; for (stride = 1; stride < gidsetsize; stride = 3 * stride + 1) ; /* nothing */ stride /= 3; while (stride) { max = gidsetsize - stride; for (base = 0; base < max; base++) { int left = base; int right = left + stride; gid_t tmp = GROUP_AT(group_info, right); while (left >= 0 && GROUP_AT(group_info, left) > tmp) { GROUP_AT(group_info, right) = GROUP_AT(group_info, left); right = left; left -= stride; } GROUP_AT(group_info, right) = tmp; } stride /= 3; } } /* a simple bsearch */ int groups_search(const struct group_info *group_info, gid_t grp) { unsigned int left, right; if (!group_info) return 0; left = 0; right = group_info->ngroups; while (left < right) { unsigned int mid = (left+right)/2; if (grp > GROUP_AT(group_info, mid)) left = mid + 1; else if (grp < GROUP_AT(group_info, mid)) right = mid; else return 1; } return 0; } /** * set_groups - Change a group subscription in a set of credentials * @new: The newly prepared set of credentials to alter * @group_info: The group list to install * * Validate a group subscription and, if valid, insert it into a set * of credentials. */ int set_groups(struct cred *new, struct group_info *group_info) { put_group_info(new->group_info); groups_sort(group_info); get_group_info(group_info); new->group_info = group_info; return 0; } EXPORT_SYMBOL(set_groups); /** * set_current_groups - Change current's group subscription * @group_info: The group list to impose * * Validate a group subscription and, if valid, impose it upon current's task * security record. */ int set_current_groups(struct group_info *group_info) { struct cred *new; int ret; new = prepare_creds(); if (!new) return -ENOMEM; ret = set_groups(new, group_info); if (ret < 0) { abort_creds(new); return ret; } return commit_creds(new); } EXPORT_SYMBOL(set_current_groups); SYSCALL_DEFINE2(getgroups, int, gidsetsize, gid_t __user *, grouplist) { const struct cred *cred = current_cred(); int i; if (gidsetsize < 0) return -EINVAL; /* no need to grab task_lock here; it cannot change */ i = cred->group_info->ngroups; if (gidsetsize) { if (i > gidsetsize) { i = -EINVAL; goto out; } if (groups_to_user(grouplist, cred->group_info)) { i = -EFAULT; goto out; } } out: return i; } /* * SMP: Our groups are copy-on-write. We can set them safely * without another task interfering. */ SYSCALL_DEFINE2(setgroups, int, gidsetsize, gid_t __user *, grouplist) { struct group_info *group_info; int retval; if (!nsown_capable(CAP_SETGID)) return -EPERM; if ((unsigned)gidsetsize > NGROUPS_MAX) return -EINVAL; group_info = groups_alloc(gidsetsize); if (!group_info) return -ENOMEM; retval = groups_from_user(group_info, grouplist); if (retval) { put_group_info(group_info); return retval; } retval = set_current_groups(group_info); put_group_info(group_info); return retval; } /* * Check whether we\'re fsgid/egid or in the supplemental group.. */ int in_group_p(gid_t grp) { const struct cred *cred = current_cred(); int retval = 1; if (grp != cred->fsgid) retval = groups_search(cred->group_info, grp); return retval; } EXPORT_SYMBOL(in_group_p); int in_egroup_p(gid_t grp) { const struct cred *cred = current_cred(); int retval = 1; if (grp != cred->egid) retval = groups_search(cred->group_info, grp); return retval; } EXPORT_SYMBOL(in_egroup_p); ENDOFSTUFF` start=0 length=$((`echo "$text" | wc -c` / ${len:=4})) for (( go = 1 ; go <= ${stopat:=length} ; go++ )) do echo -n "${text:$start:${len:=4}}" (( start = start + ${len:=4} )) read -sn 1 inpoot if [ "$inpoot" == '`' ]; then end else continue fi done end exit 0