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Diffstat (limited to 'src/openrc-shutdown/rc-sysvinit.c')
-rw-r--r--src/openrc-shutdown/rc-sysvinit.c102
1 files changed, 102 insertions, 0 deletions
diff --git a/src/openrc-shutdown/rc-sysvinit.c b/src/openrc-shutdown/rc-sysvinit.c
new file mode 100644
index 00000000..8d258b63
--- /dev/null
+++ b/src/openrc-shutdown/rc-sysvinit.c
@@ -0,0 +1,102 @@
+/*
+ * rc-sysvinit.c
+ * Helper to send a runlevel change to sysvinit
+ */
+
+/*
+ * Copyright (c) 2019 The OpenRC Authors.
+ * See the Authors file at the top-level directory of this distribution and
+ * https://github.com/OpenRC/openrc/blob/HEAD/AUTHORS
+ *
+ * This file is part of OpenRC. It is subject to the license terms in
+ * the LICENSE file found in the top-level directory of this
+ * distribution and at https://github.com/OpenRC/openrc/blob/HEAD/LICENSE
+ * This file may not be copied, modified, propagated, or distributed
+ * except according to the terms contained in the LICENSE file.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include "einfo.h"
+#include "rc-sysvinit.h"
+
+static void sysvinit_send_cmd(struct init_request *request)
+{
+ int fd;
+ char *p;
+ size_t bytes;
+ ssize_t r;
+
+ fd = open("/run/initctl", O_WRONLY|O_NONBLOCK|O_CLOEXEC|O_NOCTTY);
+ if (fd < 0) {
+ if (errno != ENOENT)
+ eerror("Failed to open initctl fifo: %s", strerror(errno));
+ return;
+ }
+ p = (char *) request;
+ bytes = sizeof(*request);
+ do {
+ r = write(fd, p, bytes);
+ if (r < 0) {
+ if ((errno == EAGAIN) || (errno == EINTR))
+ continue;
+ eerror("Failed to write to /run/initctl: %s", strerror(errno));
+ return;
+ }
+ p += r;
+ bytes -= r;
+ } while (bytes > 0);
+}
+
+void sysvinit_runlevel(char rl)
+{
+ struct init_request request;
+
+ if (!rl)
+ return;
+
+ request = (struct init_request) {
+ .magic = INIT_MAGIC,
+ .sleeptime = 0,
+ .cmd = INIT_CMD_RUNLVL,
+ .runlevel = rl,
+ };
+ sysvinit_send_cmd(&request);
+ return;
+}
+
+/*
+ * Set environment variables in the init process.
+ */
+void sysvinit_setenv(const char *name, const char *value)
+{
+ struct init_request request;
+ size_t nl;
+ size_t vl;
+
+ memset(&request, 0, sizeof(request));
+ request.magic = INIT_MAGIC;
+ request.cmd = INIT_CMD_SETENV;
+ nl = strlen(name);
+ if (value)
+ vl = strlen(value);
+else
+ vl = 0;
+
+ if (nl + vl + 3 >= (int)sizeof(request.i.data))
+ return;
+
+ memcpy(request.i.data, name, nl);
+ if (value) {
+ request.i.data[nl] = '=';
+ memcpy(request.i.data + nl + 1, value, vl);
+ }
+ sysvinit_send_cmd(&request);
+ return;
+}