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/*
* Copyright (C) 2014-2021 Firejail Authors
*
* This file is part of firejail project
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "fbuilder.h"
// find exact name or an exact name in a parent directory
FileDB *filedb_find(FileDB *head, const char *fname) {
assert(fname);
FileDB *ptr = head;
int found = 0;
int len = strlen(fname);
while (ptr) {
// exact name
if (strcmp(fname, ptr->fname) == 0) {
found = 1;
break;
}
// parent directory in the list
if (len > ptr->len &&
fname[ptr->len] == '/' &&
strncmp(ptr->fname, fname, ptr->len) == 0) {
found = 1;
break;
}
ptr = ptr->next;
}
if (found)
return ptr;
return NULL;
}
FileDB *filedb_add(FileDB *head, const char *fname) {
assert(fname);
// todo: support fnames such as ${RUNUSER}/.mutter-Xwaylandauth.*
// don't add it if it is already there or if the parent directory is already in the list
if (filedb_find(head, fname))
return head;
// add a new entry
FileDB *entry = malloc(sizeof(FileDB));
if (!entry)
errExit("malloc");
memset(entry, 0, sizeof(FileDB));
entry->fname = strdup(fname);
if (!entry->fname)
errExit("strdup");
entry->len = strlen(entry->fname);
entry->next = head;
return entry;
};
void filedb_print(FileDB *head, const char *prefix, FILE *fp) {
assert(head);
assert(prefix);
FileDB *ptr = head;
while (ptr) {
if (fp)
fprintf(fp, "%s%s\n", prefix, ptr->fname);
else
printf("%s%s\n", prefix, ptr->fname);
ptr = ptr->next;
}
}
FileDB *filedb_load_whitelist(FileDB *head, const char *fname, const char *prefix) {
assert(fname);
assert(prefix);
int len = strlen(prefix);
char *f;
if (asprintf(&f, "%s/%s", SYSCONFDIR, fname) == -1)
errExit("asprintf");
FILE *fp = fopen(f, "r");
if (!fp) {
fprintf(stderr, "Error: cannot open whitelist-common.inc\n");
free(f);
exit(1);
}
char buf[MAX_BUF];
while (fgets(buf, MAX_BUF, fp)) {
if (strncmp(buf, prefix, len) != 0)
continue;
char *fn = buf + len;
char *ptr = strchr(buf, '\n');
if (!ptr)
continue;
*ptr = '\0';
// add the file to skip list
head = filedb_add(head, fn);
}
fclose(fp);
free(f);
//printf("***************************************************\n");
//filedb_print(head, prefix, NULL);
//printf("***************************************************\n");
return head;
}
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