LTP 第三章开发系统调用测试集

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在第二章中我们写了 Shell 测试集，在本章，我们将开发基于 C 的系统调用测试集,使用新 API 重写既有的测试 case ,整个流程与上一章基本相同，不再赘述。

在本章中，我们将编写以下几个测试：

Convert getpagesize01
Convert getpid01
Convert unlink05
Convert getppid02

在开始之前，保证工作区的干净：

1
2
3

[wxs@bogon ltp]$ git status
# 位于分支 master
无文件要提交，干净的工作区

3.1 Convert getpagesize01

3.1.1 重写代码

进入 getpagesize 目录，删除原有 getpagesize01 文件，并重写 getpagesize01.c：

[wxs@bogon ltp]$ cd testcases/kernel/syscalls/getpagesize/
[wxs@bogon getpagesize]$ ls
getpagesize01  getpagesize01.c  Makefile
[wxs@bogon getpagesize]$ rm getpagesize01*
[wxs@bogon getpagesize]$ vim getpagesize01.c

/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc.
 */
/**********************************************************
 *
 *    TEST IDENTIFIER   : getpagesize01
 *
 *    TEST TITLE        : Basic tests for getpagesize(2)
 *
 *    TEST CASE TOTAL   : 1
 *
 *    AUTHOR            : jitwxs
 *                        <jitwxs@foxmail.com>
 *
 *    DESCRIPTION
 *      This is a Phase I test for the getpagesize(2) system call.
 *      It is intended to provide a limited exposure of the system call.
 *
 **********************************************************/

#include <errno.h>
#include "tst_test.h"

static void testGetpagesize(void)
{
    int size, ret_sysconf;

    TEST(getpagesize());

    if (TEST_RETURN == -1) {
        tst_res(TFAIL | TTERRNO, "getpagesize failed");
    } else {
        size = getpagesize();
        tst_res(TINFO, "Page Size is %d", size);
        ret_sysconf = sysconf(_SC_PAGESIZE);
        if (size == ret_sysconf)
            tst_res(TPASS,
                    "getpagesize - Page size returned %d",
                    ret_sysconf);
        else
            tst_res(TFAIL,
                    "getpagesize - Page size returned %d",
                    ret_sysconf);
    }
}

static struct tst_test test = {
    .test_all = testGetpagesize
};

make 并测试正确性：

[wxs@bogon getpagesize]$ make
make -C "/home/wxs/ltp/lib" -f "/home/wxs/ltp/lib/Makefile" all
make[1]: 进入目录“/home/wxs/ltp/lib”
make[2]: 进入目录“/home/wxs/ltp/lib/newlib_tests”
make[2]: 对“all”无需做任何事。
make[2]: 离开目录“/home/wxs/ltp/lib/newlib_tests”
make[2]: 进入目录“/home/wxs/ltp/lib/tests”
make[2]: 对“all”无需做任何事。
make[2]: 离开目录“/home/wxs/ltp/lib/tests”
make[1]: 离开目录“/home/wxs/ltp/lib”
gcc -g -O2 -g -O2 -fno-strict-aliasing -pipe -Wall -W -Wold-style-definition -D_FORTIFY_SOURCE=2 -I../../../../include -I../../../../include -I../../../../include/old/   -L../../../../lib  getpagesize01.c   -lltp -o getpagesize01
[wxs@bogon getpagesize]$ ./getpagesize01 
tst_test.c:934: INFO: Timeout per run is 0h 05m 00s
getpagesize01.c:44: INFO: Page Size is 4096
getpagesize01.c:49: PASS: getpagesize - Page size returned 4096

Summary:
passed   1
failed   0
skipped  0
warnings 0

3.1.2 提交 git

[wxs@bogon getpagesize]$ cd ~/ltp
[wxs@bogon ltp]$ git status
# 位于分支 mybranch
# 尚未暂存以备提交的变更：
#   （使用 "git add <file>..." 更新要提交的内容）
#   （使用 "git checkout -- <file>..." 丢弃工作区的改动）
#
#   修改：      testcases/kernel/syscalls/getpagesize/getpagesize01.c
#
# 未跟踪的文件:
#   （使用 "git add <file>..." 以包含要提交的内容）
#
#   testcases/kernel/log
修改尚未加入提交（使用 "git add" 和/或 "git commit -a"）
[wxs@bogon ltp]$ git add testcases/kernel/syscalls/getpagesize/getpagesize01.c
[wxs@bogon ltp]$ git commit -s -m "syscalls/getpagesize: Convert to new API for test getpagesize(2)"
[mybranch 3c7efcb] syscalls/getpagesize: Convert to new API for test getpagesize(2)
 1 file changed, 60 insertions(+), 105 deletions(-)
 rewrite testcases/kernel/syscalls/getpagesize/getpagesize01.c (90%)

3.1.3 生成 patch 并校验

[wxs@bogon ltp]$ git format-patch -1
0001-syscalls-getpagesize-Convert-to-new-API-for-test-get.patch
[wxs@bogon ltp]$ ../linux/scripts/checkpatch.pl 0001-syscalls-getpagesize-Convert-to-new-API-for-test-get.patch 
total: 0 errors, 0 warnings, 132 lines checked

0001-syscalls-getpagesize-Convert-to-new-API-for-test-get.patch has no obvious style problems and is ready for submission.

3.2 Convert getpid01

3.2.1 重写代码

进入 getpagesize 目录，删除原有 getpid01 文件，并重写 getpid01.c：

[wxs@bogon ltp]$ cd testcases/kernel/syscalls/getpid/
[wxs@bogon getpid]$ ls
getpid01  getpid01.c  getpid02  getpid02.c  Makefile
[wxs@bogon getpid]$ rm getpid01*
[wxs@bogon getpid]$ vim getpid01.c

/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc.
 */
/**********************************************************
 *
 *    TEST IDENTIFIER   : getpid01
 *
 *    TEST TITLE        : Basic tests for getpid(2)
 *
 *    TEST CASE TOTAL   : 1
 *
 *    AUTHOR            : jitwxs
 *                        <jitwxs@foxmail.com>
 *
 *    DESCRIPTION
 *      Testcase to check the basic functionality of getpid().
 *
 **********************************************************/

#include <errno.h>
#include "tst_test.h"

static void test_getpid(void)
{
    TEST(getpid());

    if (TEST_RETURN == -1)
        tst_res(TFAIL | TTERRNO, "getpid failed");
    else
        tst_res(TPASS, "getpid returned %ld", TEST_RETURN);
}

static struct tst_test test = {
    .test_all = test_getpid
};

make 并测试正确性：

[wxs@bogon getpid]$ make
make -C "/home/wxs/ltp/lib" -f "/home/wxs/ltp/lib/Makefile" all
make[1]: 进入目录“/home/wxs/ltp/lib”
make[2]: 进入目录“/home/wxs/ltp/lib/newlib_tests”
make[2]: 对“all”无需做任何事。
make[2]: 离开目录“/home/wxs/ltp/lib/newlib_tests”
make[2]: 进入目录“/home/wxs/ltp/lib/tests”
make[2]: 对“all”无需做任何事。
make[2]: 离开目录“/home/wxs/ltp/lib/tests”
make[1]: 离开目录“/home/wxs/ltp/lib”
gcc -g -O2 -g -O2 -fno-strict-aliasing -pipe -Wall -W -Wold-style-definition -D_FORTIFY_SOURCE=2 -I../../../../include -I../../../../include -I../../../../include/old/   -L../../../../lib  getpid01.c   -lltp -o getpid01
[wxs@bogon getpid]$ ./getpid01 
tst_test.c:934: INFO: Timeout per run is 0h 05m 00s
getpid01.c:41: PASS: getpid returned 17650

Summary:
passed   1
failed   0
skipped  0
warnings 0

3.2.2 提交 git

[wxs@bogon getpid]$ cd ~/ltp/
[wxs@bogon ltp]$ git status
# 位于分支 mybranch
# 尚未暂存以备提交的变更：
#   （使用 "git add <file>..." 更新要提交的内容）
#   （使用 "git checkout -- <file>..." 丢弃工作区的改动）
#
#   修改：      testcases/kernel/syscalls/getpid/getpid01.c
#
# 未跟踪的文件:
#   （使用 "git add <file>..." 以包含要提交的内容）
#
#   testcases/kernel/log
修改尚未加入提交（使用 "git add" 和/或 "git commit -a"）
[wxs@bogon ltp]$ git add testcases/kernel/syscalls/getpid/getpid01.c
[wxs@bogon ltp]$ git commit -s -m "syscalls/getpid: Convert to new API for test getpid(2)"
[mybranch 6b82447] syscalls/getpid: Convert to new API for test getpid(2)
 1 file changed, 47 insertions(+), 158 deletions(-)
 rewrite testcases/kernel/syscalls/getpid/getpid01.c (83%)

3.2.3 生成 patch 并校验

[wxs@bogon ltp]$ git format-patch -2
0001-syscalls-getpagesize-Convert-to-new-API-for-test-get.patch
0002-syscalls-getpid-Convert-to-new-API-for-test-getpid-2.patch
[wxs@bogon ltp]$ ../linux/scripts/checkpatch.pl 0002-syscalls-getpid-Convert-to-new-API-for-test-getpid-2.patch
total: 0 errors, 0 warnings, 173 lines checked

0002-syscalls-getpid-Convert-to-new-API-for-test-getpid-2.patch has no obvious style problems and is ready for submission.

3.3 Convert unlink05

3.3.1 重写代码

进入 unlink目录，删除原有 unlink05 文件，并重写 unlink05.c：

[wxs@bogon ltp]$ cd testcases/kernel/syscalls/unlink
[wxs@bogon unlink]$ ls
Makefile  unlink05.c  unlink06.c  unlink07.c  unlink08.c
unlink05  unlink06    unlink07    unlink08
[wxs@bogon unlink]$ rm unlink05*
[wxs@bogon unlink]$ vim unlink05.c

/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc.
 */
/**********************************************************
 *
 *    TEST IDENTIFIER   : unlink05
 *
 *    TEST TITLE        : Basic tests for unlink(1)
 *
 *    TEST CASE TOTAL   : 1
 *
 *    AUTHOR            : jitwxs
 *                        <jitwxs@foxmail.com>
 *
 *    DESCRIPTION
 *		It should/will be extended when full functional tests are written for
 *		unlink(2).
 *
 **********************************************************/

#include <errno.h>
#include "tst_test.h"

#define TMPFILE "tmpfile"

static void testUnlink(void)
{
    TEST(unlink(TMPFILE));

    if (TEST_RETURN == -1 || access(TMPFILE, F_OK) == 0)
        tst_res(TFAIL | TTERRNO, "unlink(%s) Failed, errno=%d : %s",
                TMPFILE, TEST_ERRNO, strerror(TEST_ERRNO));
    else
        tst_res(TPASS, "unlink(%s) returned %ld",
                TMPFILE, TEST_RETURN);
}

static void setup(void)
{
    SAFE_TOUCH(TMPFILE, 0777, NULL);
}

static struct tst_test test = {
    .needs_tmpdir = 1,
    .setup = setup,
    .test_all = testUnlink
};

make 并测试正确性：

[wxs@bogon unlink]$ make
make -C "/home/wxs/ltp/lib" -f "/home/wxs/ltp/lib/Makefile" all
make[1]: 进入目录“/home/wxs/ltp/lib”
make[2]: 进入目录“/home/wxs/ltp/lib/newlib_tests”
make[2]: 对“all”无需做任何事。
make[2]: 离开目录“/home/wxs/ltp/lib/newlib_tests”
make[2]: 进入目录“/home/wxs/ltp/lib/tests”
make[2]: 对“all”无需做任何事。
make[2]: 离开目录“/home/wxs/ltp/lib/tests”
make[1]: 离开目录“/home/wxs/ltp/lib”
gcc -g -O2 -g -O2 -fno-strict-aliasing -pipe -Wall -W -Wold-style-definition -D_FORTIFY_SOURCE=2 -I../../../../include -I../../../../include -I../../../../include/old/   -L../../../../lib  unlink05.c   -lltp -o unlink05
[wxs@bogon unlink]$ ./unlink05 
tst_test.c:934: INFO: Timeout per run is 0h 05m 00s
unlink05.c:45: PASS: unlink(tmpfile) returned 0

Summary:
passed   1
failed   0
skipped  0
warnings 0

3.3.2 提交 git

[wxs@bogon unlink]$ cd ~/ltp/
[wxs@bogon ltp]$ git status
# 位于分支 mybranch
# 尚未暂存以备提交的变更：
#   （使用 "git add <file>..." 更新要提交的内容）
#   （使用 "git checkout -- <file>..." 丢弃工作区的改动）
#
#   修改：      testcases/kernel/syscalls/unlink/unlink05.c
#
# 未跟踪的文件:
#   （使用 "git add <file>..." 以包含要提交的内容）
#
#   testcases/kernel/log
修改尚未加入提交（使用 "git add" 和/或 "git commit -a"）
[wxs@bogon ltp]$ git add testcases/kernel/syscalls/unlink/unlink05.c
[wxs@bogon ltp]$ git commit -s -m "syscalls/unlink: Convert to new API for test unlink(1)"
[mybranch 860a098] syscalls/unlink: Convert to new API for test unlink(1)
 1 file changed, 57 insertions(+), 209 deletions(-)
 rewrite testcases/kernel/syscalls/unlink/unlink05.c (88%)

3.3.3 生成 patch 并校验

[wxs@bogon ltp]$ git format-patch -3
0001-syscalls-getpagesize-Convert-to-new-API-for-test-get.patch
0002-syscalls-getpid-Convert-to-new-API-for-test-getpid-2.patch
0003-syscalls-unlink-Convert-to-new-API-for-test-unlink-1.patch
[wxs@bogon ltp]$ ../linux/scripts/checkpatch.pl 0003-syscalls-unlink-Convert-to-new-API-for-test-unlink-1.patch 
total: 0 errors, 0 warnings, 235 lines checked

0003-syscalls-unlink-Convert-to-new-API-for-test-unlink-1.patch has no obvious style problems and is ready for submission.

3.4 Convert getppid02

3.4.1 重写代码

进入 getppid 目录，删除原有 getppid02 文件，并重写 getppid02.c：

[wxs@bogon ltp]$ cd testcases/kernel/syscalls/getppid/
[wxs@bogon getppid]$ ls
getppid01  getppid01.c  getppid02  getppid02.c  Makefile
[wxs@bogon getppid]$ rm getppid02*
[wxs@bogon getppid]$ vim getppid02.c

/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc.
 */
/**********************************************************
 *
 *    TEST IDENTIFIER   : getppid02
 *
 *    TEST TITLE        : Basic tests for getppid(2)
 *
 *    TEST CASE TOTAL   : 1
 *
 *    AUTHOR            : jitwxs
 *                        <jitwxs@foxmail.com>
 *
 *    DESCRIPTION
 *      Testcase to check the basic functionality of the getppid() syscall.
 *
 **********************************************************/

#include <errno.h>
#include <sys/wait.h>
#include "tst_test.h"

static void testGetppid(void)
{
    int status;
    pid_t pid, ppid;

    ppid = getpid();
    pid = SAFE_FORK();

    if (pid == -1)
        tst_res(TFAIL, "fork failed");
    else if (pid == 0) {
        TEST(getppid());
        if (ppid != TEST_RETURN)
            tst_res(TFAIL | TERRNO,
                    "getppid Failed (%ld != %d)",
                    TEST_RETURN, ppid);
        else
            tst_res(TPASS,
                    "getppid Success (%ld == %d)",
                    TEST_RETURN, ppid);
    } else {
        if (wait(&status) == -1)
            tst_res(TBROK | TERRNO,
                    "wait failed");
        if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
            tst_res(TFAIL,
                    "getppid functionality incorrect");
    }
}

static struct tst_test test = {
    .test_all = testGetppid,
    .forks_child = 1
};

make 并测试正确性：

[wxs@bogon getppid]$ make
make -C "/home/wxs/ltp/lib" -f "/home/wxs/ltp/lib/Makefile" all
make[1]: 进入目录“/home/wxs/ltp/lib”
make[2]: 进入目录“/home/wxs/ltp/lib/newlib_tests”
make[2]: 对“all”无需做任何事。
make[2]: 离开目录“/home/wxs/ltp/lib/newlib_tests”
make[2]: 进入目录“/home/wxs/ltp/lib/tests”
make[2]: 对“all”无需做任何事。
make[2]: 离开目录“/home/wxs/ltp/lib/tests”
make[1]: 离开目录“/home/wxs/ltp/lib”
gcc -g -O2 -g -O2 -fno-strict-aliasing -pipe -Wall -W -Wold-style-definition -D_FORTIFY_SOURCE=2 -I../../../../include -I../../../../include -I../../../../include/old/   -L../../../../lib  getppid02.c   -lltp -o getppid02
[wxs@bogon getppid]$ ./getppid02 
tst_test.c:934: INFO: Timeout per run is 0h 05m 00s
getppid02.c:54: PASS: getppid Success (18017 == 18017)

Summary:
passed   1
failed   0
skipped  0
warnings 0

3.4.2 提交 git

[wxs@bogon getppid]$ cd ~/ltp
[wxs@bogon ltp]$ git status
# 位于分支 mybranch
# 尚未暂存以备提交的变更：
#   （使用 "git add <file>..." 更新要提交的内容）
#   （使用 "git checkout -- <file>..." 丢弃工作区的改动）
#
#   修改：      testcases/kernel/syscalls/getppid/getppid02.c
#
# 未跟踪的文件:
#   （使用 "git add <file>..." 以包含要提交的内容）
#
#   testcases/kernel/log
修改尚未加入提交（使用 "git add" 和/或 "git commit -a"）
[wxs@bogon ltp]$ git add testcases/kernel/syscalls/getppid/getppid02.c
[wxs@bogon ltp]$ git commit -s -m "syscalls/getppid: Convert to new API for test getppid(2)"
[mybranch 80d5955] syscalls/getppid: Convert to new API for test getppid(2)
 1 file changed, 69 insertions(+), 107 deletions(-)
 rewrite testcases/kernel/syscalls/getppid/getppid02.c (95%)

3.4.3 生成 patch 并校验

[wxs@bogon ltp]$ git format-patch -4
0001-syscalls-getpagesize-Convert-to-new-API-for-test-get.patch
0002-syscalls-getpid-Convert-to-new-API-for-test-getpid-2.patch
0003-syscalls-unlink-Convert-to-new-API-for-test-unlink-1.patch
0004-syscalls-getppid-Convert-to-new-API-for-test-getppid.patch
[wxs@bogon ltp]$ ../linux/scripts/checkpatch.pl 0004-syscalls-getppid-Convert-to-new-API-for-test-getppid.patch 
total: 0 errors, 0 warnings, 151 lines checked

0004-syscalls-getppid-Convert-to-new-API-for-test-getppid.patch has no obvious style problems and is ready for submission.

LTP 第三章 开发系统调用测试集

3.1 Convert getpagesize01

3.1.1 重写代码

3.1.2 提交 git

3.1.3 生成 patch 并校验

3.2 Convert getpid01

3.2.1 重写代码

3.2.2 提交 git

3.2.3 生成 patch 并校验

3.3 Convert unlink05

3.3.1 重写代码

3.3.2 提交 git

3.3.3 生成 patch 并校验

3.4 Convert getppid02

3.4.1 重写代码

3.4.2 提交 git

3.4.3 生成 patch 并校验

LTP 第三章开发系统调用测试集