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-rw-r--r--lib/util/argv_exec.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/lib/util/argv_exec.c b/lib/util/argv_exec.c
new file mode 100644
index 0000000..e39153c
--- /dev/null
+++ b/lib/util/argv_exec.c
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * Copyright (C) 2018 - David Oberhollenzer
+ *
+ * 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 3 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, see <https://www.gnu.org/licenses/>.
+ */
+#include "service.h"
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <fcntl.h>
+#include <stdio.h>
+
+int setup_tty(const char *tty, bool truncate)
+{
+ int fd;
+
+ if (tty == NULL)
+ return 0;
+
+ fd = open(tty, O_RDWR);
+ if (fd < 0) {
+ perror(tty);
+ return -1;
+ }
+
+ if (truncate)
+ ftruncate(fd, 0);
+
+ close(STDIN_FILENO);
+ close(STDOUT_FILENO);
+ close(STDERR_FILENO);
+
+ setsid();
+
+ dup2(fd, STDIN_FILENO);
+ dup2(fd, STDOUT_FILENO);
+ dup2(fd, STDERR_FILENO);
+ close(fd);
+ return 0;
+}
+
+void argv_exec(exec_t *e)
+{
+ char **argv = alloca(e->argc + 1), *ptr;
+ int i;
+
+ for (ptr = e->args, i = 0; i < e->argc; ++i, ptr += strlen(ptr) + 1)
+ argv[i] = ptr;
+
+ argv[i] = NULL;
+ execvp(argv[0], argv);
+ perror(argv[0]);
+ exit(EXIT_FAILURE);
+}