perf target: Introduce perf_target__parse_uid()

Add and use the modern perf_target__parse_uid() and get rid of the old
parse_target_uid().

Signed-off-by: Namhyung Kim <namhyung.kim@lge.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1336367344-28071-5-git-send-email-namhyung.kim@lge.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/tools/perf/util/target.c b/tools/perf/util/target.c
index 5c59dcfc8f8..02a6bedb69a 100644
--- a/tools/perf/util/target.c
+++ b/tools/perf/util/target.c
@@ -9,6 +9,8 @@
 #include "target.h"
 #include "debug.h"
 
+#include <pwd.h>
+
 
 enum perf_target_errno perf_target__validate(struct perf_target *target)
 {
@@ -54,3 +56,36 @@ enum perf_target_errno perf_target__validate(struct perf_target *target)
 
 	return ret;
 }
+
+enum perf_target_errno perf_target__parse_uid(struct perf_target *target)
+{
+	struct passwd pwd, *result;
+	char buf[1024];
+	const char *str = target->uid_str;
+
+	target->uid = UINT_MAX;
+	if (str == NULL)
+		return PERF_ERRNO_TARGET__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 PERF_ERRNO_TARGET__INVALID_UID;
+
+		getpwuid_r(uid, &pwd, buf, sizeof(buf), &result);
+
+		if (result == NULL)
+			return PERF_ERRNO_TARGET__USER_NOT_FOUND;
+	}
+
+	target->uid = result->pw_uid;
+	return PERF_ERRNO_TARGET__SUCCESS;
+}