v4.19.13 snapshot.
diff --git a/tools/perf/util/target.c b/tools/perf/util/target.c
new file mode 100644
index 0000000..21c4d9b
--- /dev/null
+++ b/tools/perf/util/target.c
@@ -0,0 +1,152 @@
+/*
+ * Helper functions for handling target threads/cpus
+ *
+ * Copyright (C) 2012, LG Electronics, Namhyung Kim <namhyung.kim@lge.com>
+ *
+ * Released under the GPL v2.
+ */
+
+#include "target.h"
+#include "util.h"
+#include "debug.h"
+
+#include <pwd.h>
+#include <string.h>
+
+
+enum target_errno target__validate(struct target *target)
+{
+ enum target_errno ret = TARGET_ERRNO__SUCCESS;
+
+ if (target->pid)
+ target->tid = target->pid;
+
+ /* CPU and PID are mutually exclusive */
+ if (target->tid && target->cpu_list) {
+ target->cpu_list = NULL;
+ if (ret == TARGET_ERRNO__SUCCESS)
+ ret = TARGET_ERRNO__PID_OVERRIDE_CPU;
+ }
+
+ /* UID and PID are mutually exclusive */
+ if (target->tid && target->uid_str) {
+ target->uid_str = NULL;
+ if (ret == TARGET_ERRNO__SUCCESS)
+ ret = TARGET_ERRNO__PID_OVERRIDE_UID;
+ }
+
+ /* UID and CPU are mutually exclusive */
+ if (target->uid_str && target->cpu_list) {
+ target->cpu_list = NULL;
+ if (ret == TARGET_ERRNO__SUCCESS)
+ ret = TARGET_ERRNO__UID_OVERRIDE_CPU;
+ }
+
+ /* PID and SYSTEM are mutually exclusive */
+ if (target->tid && target->system_wide) {
+ target->system_wide = false;
+ if (ret == TARGET_ERRNO__SUCCESS)
+ ret = TARGET_ERRNO__PID_OVERRIDE_SYSTEM;
+ }
+
+ /* UID and SYSTEM are mutually exclusive */
+ if (target->uid_str && target->system_wide) {
+ target->system_wide = false;
+ if (ret == TARGET_ERRNO__SUCCESS)
+ ret = TARGET_ERRNO__UID_OVERRIDE_SYSTEM;
+ }
+
+ /* THREAD and SYSTEM/CPU are mutually exclusive */
+ if (target->per_thread && (target->system_wide || target->cpu_list)) {
+ target->per_thread = false;
+ if (ret == TARGET_ERRNO__SUCCESS)
+ ret = TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD;
+ }
+
+ return ret;
+}
+
+enum target_errno target__parse_uid(struct target *target)
+{
+ struct passwd pwd, *result;
+ char buf[1024];
+ const char *str = target->uid_str;
+
+ target->uid = UINT_MAX;
+ if (str == NULL)
+ return TARGET_ERRNO__SUCCESS;
+
+ /* Try user name first */
+ getpwnam_r(str, &pwd, buf, sizeof(buf), &result);
+
+ if (result == NULL) {
+ /*
+ * The user name not found. Maybe it's a UID number.
+ */
+ char *endptr;
+ int uid = strtol(str, &endptr, 10);
+
+ if (*endptr != '\0')
+ return TARGET_ERRNO__INVALID_UID;
+
+ getpwuid_r(uid, &pwd, buf, sizeof(buf), &result);
+
+ if (result == NULL)
+ return TARGET_ERRNO__USER_NOT_FOUND;
+ }
+
+ target->uid = result->pw_uid;
+ return TARGET_ERRNO__SUCCESS;
+}
+
+/*
+ * This must have a same ordering as the enum target_errno.
+ */
+static const char *target__error_str[] = {
+ "PID/TID switch overriding CPU",
+ "PID/TID switch overriding UID",
+ "UID switch overriding CPU",
+ "PID/TID switch overriding SYSTEM",
+ "UID switch overriding SYSTEM",
+ "SYSTEM/CPU switch overriding PER-THREAD",
+ "Invalid User: %s",
+ "Problems obtaining information for user %s",
+};
+
+int target__strerror(struct target *target, int errnum,
+ char *buf, size_t buflen)
+{
+ int idx;
+ const char *msg;
+
+ BUG_ON(buflen == 0);
+
+ if (errnum >= 0) {
+ str_error_r(errnum, buf, buflen);
+ return 0;
+ }
+
+ if (errnum < __TARGET_ERRNO__START || errnum >= __TARGET_ERRNO__END)
+ return -1;
+
+ idx = errnum - __TARGET_ERRNO__START;
+ msg = target__error_str[idx];
+
+ switch (errnum) {
+ case TARGET_ERRNO__PID_OVERRIDE_CPU ...
+ TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD:
+ snprintf(buf, buflen, "%s", msg);
+ break;
+
+ case TARGET_ERRNO__INVALID_UID:
+ case TARGET_ERRNO__USER_NOT_FOUND:
+ snprintf(buf, buflen, msg, target->uid_str);
+ break;
+
+ default:
+ /* cannot reach here */
+ break;
+ }
+
+ return 0;
+}