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Diffstat (limited to 'src/libshared/spawn-polkit-agent.c')
-rw-r--r--src/libshared/spawn-polkit-agent.c102
1 files changed, 102 insertions, 0 deletions
diff --git a/src/libshared/spawn-polkit-agent.c b/src/libshared/spawn-polkit-agent.c
new file mode 100644
index 0000000000..7dae4d14fe
--- /dev/null
+++ b/src/libshared/spawn-polkit-agent.c
@@ -0,0 +1,102 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2011 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <errno.h>
+#include <poll.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "fd-util.h"
+#include "io-util.h"
+#include "log.h"
+#include "macro.h"
+#include "process-util.h"
+#include "spawn-polkit-agent.h"
+#include "stdio-util.h"
+#include "time-util.h"
+#include "util.h"
+
+#ifdef ENABLE_POLKIT
+static pid_t agent_pid = 0;
+
+int polkit_agent_open(void) {
+ int r;
+ int pipe_fd[2];
+ char notify_fd[DECIMAL_STR_MAX(int) + 1];
+
+ if (agent_pid > 0)
+ return 0;
+
+ /* Clients that run as root don't need to activate/query polkit */
+ if (geteuid() == 0)
+ return 0;
+
+ /* We check STDIN here, not STDOUT, since this is about input,
+ * not output */
+ if (!isatty(STDIN_FILENO))
+ return 0;
+
+ if (pipe2(pipe_fd, 0) < 0)
+ return -errno;
+
+ xsprintf(notify_fd, "%i", pipe_fd[1]);
+
+ r = fork_agent(&agent_pid,
+ &pipe_fd[1], 1,
+ POLKIT_AGENT_BINARY_PATH,
+ POLKIT_AGENT_BINARY_PATH, "--notify-fd", notify_fd, "--fallback", NULL);
+
+ /* Close the writing side, because that's the one for the agent */
+ safe_close(pipe_fd[1]);
+
+ if (r < 0)
+ log_error_errno(r, "Failed to fork TTY ask password agent: %m");
+ else
+ /* Wait until the agent closes the fd */
+ fd_wait_for_event(pipe_fd[0], POLLHUP, USEC_INFINITY);
+
+ safe_close(pipe_fd[0]);
+
+ return r;
+}
+
+void polkit_agent_close(void) {
+
+ if (agent_pid <= 0)
+ return;
+
+ /* Inform agent that we are done */
+ (void) kill(agent_pid, SIGTERM);
+ (void) kill(agent_pid, SIGCONT);
+
+ (void) wait_for_terminate(agent_pid, NULL);
+ agent_pid = 0;
+}
+
+#else
+
+int polkit_agent_open(void) {
+ return 0;
+}
+
+void polkit_agent_close(void) {
+}
+
+#endif