Merge "Always prefer poll over select."
diff --git a/cmds/dumpstate/DumpstateInternal.cpp b/cmds/dumpstate/DumpstateInternal.cpp
index 819d5b9..33e35f7 100644
--- a/cmds/dumpstate/DumpstateInternal.cpp
+++ b/cmds/dumpstate/DumpstateInternal.cpp
@@ -20,6 +20,7 @@
#include <errno.h>
#include <grp.h>
+#include <poll.h>
#include <pwd.h>
#include <stdint.h>
#include <stdio.h>
@@ -35,6 +36,7 @@
#include <vector>
#include <android-base/file.h>
+#include <android-base/macros.h>
#include <log/log.h>
uint64_t Nanotime() {
@@ -154,22 +156,16 @@
return 0;
}
bool newline = false;
- fd_set read_set;
- timeval tm;
while (true) {
- FD_ZERO(&read_set);
- FD_SET(fd, &read_set);
- /* Timeout if no data is read for 30 seconds. */
- tm.tv_sec = 30;
- tm.tv_usec = 0;
- uint64_t elapsed = Nanotime();
- int ret = TEMP_FAILURE_RETRY(select(fd + 1, &read_set, nullptr, nullptr, &tm));
+ uint64_t start_time = Nanotime();
+ pollfd fds[] = { { .fd = fd, .events = POLLIN } };
+ int ret = TEMP_FAILURE_RETRY(poll(fds, arraysize(fds), 30 * 1000));
if (ret == -1) {
- dprintf(out_fd, "*** %s: select failed: %s\n", path, strerror(errno));
+ dprintf(out_fd, "*** %s: poll failed: %s\n", path, strerror(errno));
newline = true;
break;
} else if (ret == 0) {
- elapsed = Nanotime() - elapsed;
+ uint64_t elapsed = Nanotime() - start_time;
dprintf(out_fd, "*** %s: Timed out after %.3fs\n", path, (float)elapsed / NANOS_PER_SEC);
newline = true;
break;
