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https://github.com/SELinuxProject/selinux
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8730e0762e
Check the return value of strdup() to avoid null pointer reference. Signed-off-by: Huaxin Lu <luhuaxin1@huawei.com> Acked-by: James Carter <jwcart2@gmail.com>
139 lines
3.4 KiB
C
139 lines
3.4 KiB
C
/*
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* Copyright (C) 2006, 2008 Red Hat
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* see file 'COPYING' for use and warranty information
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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.*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307 USA
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*
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* Authors:
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* Dan Walsh <dwalsh@redhat.com>
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*
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*/
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "stringslist.h"
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#include "restorecond.h"
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#include <fnmatch.h>
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/* Sorted lists */
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void strings_list_add(struct stringsList **list, const char *string)
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{
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struct stringsList *ptr = *list;
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struct stringsList *prev = NULL;
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struct stringsList *newptr = NULL;
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while (ptr) {
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int cmp = strcmp(string, ptr->string);
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if (cmp < 0)
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break; /* Not on list break out to add */
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if (cmp == 0)
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return; /* Already on list */
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prev = ptr;
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ptr = ptr->next;
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}
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newptr = calloc(1, sizeof(struct stringsList));
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if (!newptr)
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exitApp("Out of Memory");
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newptr->string = strdup(string);
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if (!newptr->string)
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exitApp("Out of Memory");
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newptr->next = ptr;
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if (prev)
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prev->next = newptr;
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else
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*list = newptr;
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}
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int strings_list_find(struct stringsList *ptr, const char *string, int *exact)
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{
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while (ptr) {
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*exact = strcmp(ptr->string, string) == 0;
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int cmp = fnmatch(ptr->string, string, 0);
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if (cmp == 0)
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return 0; /* Match found */
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ptr = ptr->next;
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}
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return -1;
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}
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void strings_list_free(struct stringsList *ptr)
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{
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struct stringsList *prev = NULL;
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while (ptr) {
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free(ptr->string);
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prev = ptr;
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ptr = ptr->next;
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free(prev);
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}
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}
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int strings_list_diff(struct stringsList *from, struct stringsList *to)
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{
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while (from != NULL && to != NULL) {
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if (strcmp(from->string, to->string) != 0)
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return 1;
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from = from->next;
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to = to->next;
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}
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if (from != NULL || to != NULL)
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return 1;
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return 0;
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}
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void strings_list_print(struct stringsList *ptr)
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{
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while (ptr) {
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printf("%s\n", ptr->string);
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ptr = ptr->next;
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}
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}
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#ifdef TEST
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void exitApp(const char *msg)
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{
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perror(msg);
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exit(-1);
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}
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int main(int argc, char **argv)
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{
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struct stringsList *list = NULL;
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struct stringsList *list1 = NULL;
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strings_list_add(&list, "/etc/resolv.conf");
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strings_list_add(&list, "/etc/walsh");
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strings_list_add(&list, "/etc/mtab");
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strings_list_add(&list, "/etc/walsh");
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if (strings_list_diff(list, list) != 0)
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printf("strings_list_diff test1 bug\n");
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strings_list_add(&list1, "/etc/walsh");
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if (strings_list_diff(list, list1) == 0)
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printf("strings_list_diff test2 bug\n");
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strings_list_add(&list1, "/etc/walsh");
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strings_list_add(&list1, "/etc/walsh/*");
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strings_list_add(&list1, "/etc/resolv.conf");
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strings_list_add(&list1, "/etc/mtab1");
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if (strings_list_diff(list, list1) == 0)
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printf("strings_list_diff test3 bug\n");
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printf("strings list\n");
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strings_list_print(list);
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printf("strings list1\n");
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strings_list_find(list1, "/etc/walsh/dan");
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strings_list_print(list1);
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strings_list_free(list);
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strings_list_free(list1);
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}
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#endif
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