disable DBus activation in firecfg

1 files changed, 86 insertions, 0 deletions

diff --git a/src/firecfg/util.c b/src/firecfg/util.c
new file mode 100644
index 000000000..4520e75e8
--- /dev/null
+++ b/src/firecfg/util.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2014-2017 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 "firecfg.h"
+
+// return 1 if the program is found
+static int find(const char *program, const char *directory) {
+        int retval = 0;
+
+        char *fname;
+        if (asprintf(&fname, "/%s/%s", directory, program) == -1)
+                errExit("asprintf");
+
+        struct stat s;
+        if (stat(fname, &s) == 0) {
+                if (arg_debug)
+                        printf("found %s in directory %s\n", program, directory);
+                retval = 1;
+        }
+
+        free(fname);
+        return retval;
+}
+
+
+// return 1 if program is installed on the system
+int which(const char *program) {
+        // check some well-known paths
+        if (find(program, "/bin") || find(program, "/usr/bin") ||
+             find(program, "/sbin") || find(program, "/usr/sbin") ||
+             find(program, "/usr/games"))
+                return 1;
+
+        // check environment
+        char *path1 = getenv("PATH");
+        if (path1) {
+                char *path2 = strdup(path1);
+                if (!path2)
+                        errExit("strdup");
+
+                // use path2 to count the entries
+                char *ptr = strtok(path2, ":");
+                while (ptr) {
+                        if (find(program, ptr)) {
+                                free(path2);
+                                return 1;
+                        }
+                        ptr = strtok(NULL, ":");
+                }
+                free(path2);
+        }
+
+        return 0;
+}
+
+// return 1 if the file is a link
+int is_link(const char *fname) {
+        assert(fname);
+        if (*fname == '\0')
+                return 0;
+
+        struct stat s;
+        if (lstat(fname, &s) == 0) {
+                if (S_ISLNK(s.st_mode))
+                        return 1;
+        }
+
+        return 0;
+}