summaryrefslogtreecommitdiffstats
path: root/tools/perf/util/usage.c
diff options
context:
space:
mode:
authorArnaldo Carvalho de Melo <acme@redhat.com>2012-01-19 14:08:15 -0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-01-24 19:47:37 -0200
commit0d37aa34f8806bb443dd3c8621fd9bdbb50c58bb (patch)
tree3e245385cdb75fec299f5e145243f062b70fd652 /tools/perf/util/usage.c
parent9ae7d3351aac238eef9646479693105688fd9cc9 (diff)
downloadop-kernel-dev-0d37aa34f8806bb443dd3c8621fd9bdbb50c58bb.zip
op-kernel-dev-0d37aa34f8806bb443dd3c8621fd9bdbb50c58bb.tar.gz
perf tools: Introduce per user view
The new --uid command line option will show only the tasks for a given user, using the proc interface to figure out the existing tasks. Kernel work is needed to close races at startup, but this should already be useful in many use cases. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-bdnspm000gw2l984a2t53o8z@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/usage.c')
-rw-r--r--tools/perf/util/usage.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/tools/perf/util/usage.c b/tools/perf/util/usage.c
index d76d1c0..d0c0139 100644
--- a/tools/perf/util/usage.c
+++ b/tools/perf/util/usage.c
@@ -7,6 +7,7 @@
* Copyright (C) Linus Torvalds, 2005
*/
#include "util.h"
+#include "debug.h"
static void report(const char *prefix, const char *err, va_list params)
{
@@ -81,3 +82,41 @@ void warning(const char *warn, ...)
warn_routine(warn, params);
va_end(params);
}
+
+uid_t parse_target_uid(const char *str, pid_t tid, pid_t pid)
+{
+ struct passwd pwd, *result;
+ char buf[1024];
+
+ if (str == NULL)
+ return UINT_MAX;
+
+ /* CPU and PID are mutually exclusive */
+ if (tid > 0 || pid > 0) {
+ ui__warning("PID/TID switch overriding UID\n");
+ sleep(1);
+ return UINT_MAX;
+ }
+
+ getpwnam_r(str, &pwd, buf, sizeof(buf), &result);
+
+ if (result == NULL) {
+ char *endptr;
+ int uid = strtol(str, &endptr, 10);
+
+ if (*endptr != '\0') {
+ ui__error("Invalid user %s\n", str);
+ return UINT_MAX - 1;
+ }
+
+ getpwuid_r(uid, &pwd, buf, sizeof(buf), &result);
+
+ if (result == NULL) {
+ ui__error("Problems obtaining information for user %s\n",
+ str);
+ return UINT_MAX - 1;
+ }
+ }
+
+ return result->pw_uid;
+}
OpenPOWER on IntegriCloud