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authorKarel Kočí <cynerd@email.cz>2018-12-02 21:09:06 +0100
committerKarel Kočí <cynerd@email.cz>2018-12-02 21:41:15 +0100
commit68648f8fe23dd30cffec1ec05e3de42e434e1f31 (patch)
treea7bda6afb61a8d9da4ab0aff7ac993e823661578 /utils.c
parent5a7d5fa43536484508aad9d9553f64a33212311b (diff)
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Update to working version
Still way off from something usable by someone else but it already works for me.
Diffstat (limited to 'utils.c')
-rw-r--r--utils.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/utils.c b/utils.c
index 04806dd..e4f771d 100644
--- a/utils.c
+++ b/utils.c
@@ -1,4 +1,31 @@
+/* uroot - User's root
+ * utils.c Source file with various utility functions
+ *
+ * Copyright (C) 2018 Karel Kočí
+ *
+ * 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.
+ */
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <sys/wait.h>
#include "utils.h"
+#include "conf.h"
// Compute the size needed (including \0) to format given message
size_t printf_len(const char *msg, ...) {
@@ -17,3 +44,31 @@ char *printf_into(char *dst, const char *msg, ...) {
va_end(args);
return dst;
}
+
+const char *get_shell() {
+ const char *ret;
+ ret = secure_getenv("SHELL");
+ if (!ret)
+ ret = DEFAULT_SHELL;
+ return ret;
+}
+
+int new_map_id(const char *idtp, pid_t pid, int id) {
+ // TODO check /etc/sub* for current user subids and map them
+ pid_t chld = fork();
+ if (!chld) {
+ char *tool = aprintf("new%smap", idtp);
+ char *const args[] = {
+ tool, aprintf("%d", pid),
+ "0", aprintf("%d", id), "1",
+ "1", "65537", "65536",
+ NULL
+ };
+ execvp(tool, args);
+ abort();
+ }
+ int stat;
+ waitpid(chld, &stat, 0);
+ return stat;
+}
+