1 /*
2 * Copyright (c) 2023-2023 Huawei Device Co., Ltd. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without modification,
5 * are permitted provided that the following conditions are met:
6 *
7 * 1. Redistributions of source code must retain the above copyright notice, this list of
8 * conditions and the following disclaimer.
9 *
10 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
11 * of conditions and the following disclaimer in the documentation and/or other materials
12 * provided with the distribution.
13 *
14 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
15 * to endorse or promote products derived from this software without specific prior written
16 * permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
22 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
25 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
27 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
28 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30 #include <cstdio>
31 #include <unistd.h>
32 #include <cstdlib>
33 #include <fcntl.h>
34 #include <vector>
35 #include <cstring>
36 #include <sys/wait.h>
37 #include "It_process_plimits.h"
38
PidWrite(const char * filepath,char * buf)39 static int PidWrite(const char *filepath, char *buf)
40 {
41 int fd = open(filepath, O_WRONLY);
42 size_t ret = write(fd, buf, strlen(buf));
43 close(fd);
44 return ret;
45 }
46
ItProcessPlimitsPid003(void)47 void ItProcessPlimitsPid003(void)
48 {
49 mode_t mode = 0;
50 int status;
51 struct sched_param param = { 0 };
52 const char *pidMaxPath = "/proc/plimits/test/pids.priority";
53 std::string path = "/proc/plimits/test";
54 char writeBuf[3];
55 int pidnum = 15; /* 15: priority limit */
56 int ret = mkdir(path.c_str(), S_IFDIR | mode);
57 ASSERT_EQ(ret, 0);
58
59 (void)memset_s(writeBuf, sizeof(writeBuf), 0, sizeof(writeBuf));
60 ret = sprintf_s(writeBuf, sizeof(writeBuf), "%d", pidnum);
61 ASSERT_NE(ret, -1);
62
63 ret = PidWrite(pidMaxPath, writeBuf);
64 ASSERT_NE(ret, -1);
65
66 int currProcessPri = getpriority(PRIO_PROCESS, getpid());
67
68 param.sched_priority = pidnum - 1;
69 ret = sched_setscheduler(getpid(), SCHED_RR, ¶m);
70 ASSERT_NE(ret, 0);
71
72 ret = setpriority(PRIO_PROCESS, getpid(), param.sched_priority);
73 ASSERT_NE(ret, 0);
74
75 ret = sched_setparam(getpid(), ¶m);
76 ASSERT_NE(ret, 0);
77
78 param.sched_priority = currProcessPri + 1;
79 ret = sched_setscheduler(getpid(), SCHED_RR, ¶m);
80 ASSERT_EQ(ret, 0);
81
82 param.sched_priority++;
83 ret = setpriority(PRIO_PROCESS, getpid(), param.sched_priority);
84 ASSERT_EQ(ret, 0);
85
86 param.sched_priority++;
87 ret = sched_setparam(getpid(), ¶m);
88 ASSERT_EQ(ret, 0);
89
90 ret = rmdir(path.c_str());
91 ASSERT_EQ(ret, 0);
92 return;
93 }
94