Removed Common
Change-Id: I01ea8f07220375c2ad9bc0092281d4f27c642303
diff --git a/aos/util/run_command.cc b/aos/util/run_command.cc
new file mode 100644
index 0000000..2b08cb2
--- /dev/null
+++ b/aos/util/run_command.cc
@@ -0,0 +1,73 @@
+#include "aos/util/run_command.h"
+
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+#include "aos/logging/logging.h"
+
+namespace aos {
+namespace util {
+namespace {
+
+// RAII class to block SIGCHLD and then restore it on destruction.
+class BlockSIGCHLD {
+ public:
+ BlockSIGCHLD() {
+ sigset_t to_block;
+ sigemptyset(&to_block);
+ sigaddset(&to_block, SIGCHLD);
+ if (sigprocmask(SIG_BLOCK, &to_block, &original_blocked_) == -1) {
+ PLOG(FATAL, "sigprocmask(SIG_BLOCK, %p, %p) failed",
+ &to_block, &original_blocked_);
+ }
+ }
+ ~BlockSIGCHLD() {
+ if (sigprocmask(SIG_SETMASK, &original_blocked_, nullptr) == -1) {
+ PLOG(FATAL, "sigprocmask(SIG_SETMASK, %p, nullptr) failed",
+ &original_blocked_);
+ }
+ }
+
+ private:
+ sigset_t original_blocked_;
+};
+
+} // namespace
+
+int RunCommand(const char *command) {
+ BlockSIGCHLD blocker;
+ const pid_t pid = fork();
+ switch (pid) {
+ case 0: // in child
+ {
+ int new_stdin = open("/dev/null", O_RDONLY);
+ if (new_stdin == -1) _exit(127);
+ int new_stdout = open("/dev/null", O_WRONLY);
+ if (new_stdout == -1) _exit(127);
+ int new_stderr = open("/dev/null", O_WRONLY);
+ if (new_stderr == -1) _exit(127);
+ if (dup2(new_stdin, 0) != 0) _exit(127);
+ if (dup2(new_stdout, 1) != 1) _exit(127);
+ if (dup2(new_stderr, 2) != 2) _exit(127);
+ execl("/bin/sh", "sh", "-c", command, nullptr);
+ _exit(127);
+ }
+ case -1:
+ return -1;
+ default:
+ int stat;
+ while (waitpid(pid, &stat, 0) == -1) {
+ if (errno != EINTR) {
+ return -1;
+ }
+ }
+ return stat;
+ }
+}
+
+} // namespace util
+} // namespace aos