[PATCH v3] Decode RUSAGE_THREAD

[Victor Krapivensky]

* xlat/usagewho.in: Add values for existing entities, add
RUSAGE_THREAD.
* tests/getrusage.c: Test decoding of RUSAGE_THREAD.
---
 tests/getrusage.c | 31 +++++++++++++++++++++++++------
 xlat/usagewho.in  |  7 ++++---
 2 files changed, 29 insertions(+), 9 deletions(-)

diff --git a/tests/getrusage.c b/tests/getrusage.c
index 8b76eff..2ac0497 100644
--- a/tests/getrusage.c
+++ b/tests/getrusage.c
@@ -35,18 +35,23 @@
 # include <stdint.h>
 # include <sys/resource.h>
 # include <unistd.h>
+# include <errno.h>
+
+# include "xlat.h"
+# include "xlat/usagewho.h"
 
 int
-main(void)
+invoke_print(int who, const char *who_str, struct rusage *usage)
 {
-	struct rusage *const usage = tail_alloc(sizeof(struct rusage));
-	int rc = syscall(__NR_getrusage, RUSAGE_SELF, usage);
-	printf("getrusage(RUSAGE_SELF, {ru_utime={tv_sec=%jd, tv_usec=%jd}"
+	int rc = syscall(__NR_getrusage, who, usage);
+	int saved_errno = errno;
+	printf("getrusage(%s, {ru_utime={tv_sec=%jd, tv_usec=%jd}"
 	       ", ru_stime={tv_sec=%jd, tv_usec=%jd}, ru_maxrss=%lu"
 	       ", ru_ixrss=%lu, ru_idrss=%lu, ru_isrss=%lu, ru_minflt=%lu"
 	       ", ru_majflt=%lu, ru_nswap=%lu, ru_inblock=%lu"
 	       ", ru_oublock=%lu, ru_msgsnd=%lu, ru_msgrcv=%lu"
-	       ", ru_nsignals=%lu, ru_nvcsw=%lu, ru_nivcsw=%lu}) = %d\n",
+	       ", ru_nsignals=%lu, ru_nvcsw=%lu, ru_nivcsw=%lu}) = %s\n",
+	       who_str,
 	       (intmax_t) usage->ru_utime.tv_sec,
 	       (intmax_t) usage->ru_utime.tv_usec,
 	       (intmax_t) usage->ru_stime.tv_sec,
@@ -55,7 +60,21 @@ main(void)
 	       usage->ru_isrss, usage->ru_minflt, usage->ru_majflt,
 	       usage->ru_nswap, usage->ru_inblock, usage->ru_oublock,
 	       usage->ru_msgsnd, usage->ru_msgrcv, usage->ru_nsignals,
-	       usage->ru_nvcsw, usage->ru_nivcsw, rc);
+	       usage->ru_nvcsw, usage->ru_nivcsw, sprintrc(rc));
+	errno = saved_errno;
+	return rc;
+}
+
+int
+main(void)
+{
+	struct rusage *const usage = tail_alloc(sizeof(*usage));
+	if (invoke_print(ARG_STR(RUSAGE_SELF), usage)) {
+		perror_msg_and_fail("RUSAGE_SELF");
+	}
+	if (invoke_print(ARG_STR(RUSAGE_THREAD), usage) && errno != EINVAL) {
+		perror_msg_and_fail("RUSAGE_THREAD");
+	}
 
 	puts("+++ exited with 0 +++");
 	return 0;
diff --git a/xlat/usagewho.in b/xlat/usagewho.in
index e2153b3..1b1255c 100644
--- a/xlat/usagewho.in
+++ b/xlat/usagewho.in
@@ -1,3 +1,4 @@
-RUSAGE_SELF
-RUSAGE_CHILDREN
-RUSAGE_BOTH
+RUSAGE_SELF	0
+RUSAGE_CHILDREN	(-1)
+RUSAGE_BOTH	(-2)
+RUSAGE_THREAD	1
-- 
2.10.2