From b26dd6d9b78b2703a8a726376e6935011657123a Mon Sep 17 00:00:00 2001
From: Jing Chen <chjing@google.com>
Date: Wed, 2 Dec 2020 00:11:17 -0800
Subject: Add /proc/sys/kernel/sem.

PiperOrigin-RevId: 345178956
---
 test/syscalls/linux/proc.cc | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'test/syscalls')

diff --git a/test/syscalls/linux/proc.cc b/test/syscalls/linux/proc.cc
index f43a41891..575be014c 100644
--- a/test/syscalls/linux/proc.cc
+++ b/test/syscalls/linux/proc.cc
@@ -17,6 +17,7 @@
 #include <fcntl.h>
 #include <limits.h>
 #include <linux/magic.h>
+#include <linux/sem.h>
 #include <sched.h>
 #include <signal.h>
 #include <stddef.h>
@@ -2409,6 +2410,28 @@ TEST(ProcFilesystems, PresenceOfShmMaxMniAll) {
   ASSERT_LE(shmall, ULONG_MAX - (1UL << 24));
 }
 
+TEST(ProcFilesystems, PresenceOfSem) {
+  uint32_t semmsl = 0;
+  uint32_t semmns = 0;
+  uint32_t semopm = 0;
+  uint32_t semmni = 0;
+  std::string proc_file;
+  proc_file = ASSERT_NO_ERRNO_AND_VALUE(GetContents("/proc/sys/kernel/sem"));
+  ASSERT_FALSE(proc_file.empty());
+  std::vector<absl::string_view> sem_limits =
+      absl::StrSplit(proc_file, absl::ByAnyChar("\t"), absl::SkipWhitespace());
+  ASSERT_EQ(sem_limits.size(), 4);
+  ASSERT_TRUE(absl::SimpleAtoi(sem_limits[0], &semmsl));
+  ASSERT_TRUE(absl::SimpleAtoi(sem_limits[1], &semmns));
+  ASSERT_TRUE(absl::SimpleAtoi(sem_limits[2], &semopm));
+  ASSERT_TRUE(absl::SimpleAtoi(sem_limits[3], &semmni));
+
+  ASSERT_EQ(semmsl, SEMMSL);
+  ASSERT_EQ(semmns, SEMMNS);
+  ASSERT_EQ(semopm, SEMOPM);
+  ASSERT_EQ(semmni, SEMMNI);
+}
+
 // Check that /proc/mounts is a symlink to self/mounts.
 TEST(ProcMounts, IsSymlink) {
   auto link = ASSERT_NO_ERRNO_AND_VALUE(ReadLink("/proc/mounts"));
-- 
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