LTP 第四章开发_exit()测试集

末蓝、 2022-06-06 02:45 200阅读 0赞

**LTP系列链接：**

[第一章 LTP介绍及内部机制][LTP]

[第二章 开发Shell测试集][_Shell]

[第三章 开发系统调用测试集][Link 1]

[第四章 开发\_exit()测试集][_exit]

[第五章 开发IO操作测试集][_IO]

[第六章 开发IO阻塞测试集][_IO 1]

--------------------

### 文章目录 ###

*   *   *  4.1 Test point 1
         *   *  4.1.1 测试思路
             *  4.1.2 编写代码
             *  4.1.3 编译运行
             *  4.1.4 git 提交
             *  4.1.5 patch 校验
         *  4.2 Test point 2
         *   *  4.2.1 测试思路
             *  4.2.2 编写代码
             *  4.2.3 编译运行
             *  4.2.4 git 提交
             *  4.2.5 patch 校验
         *  4.3 Test point 3
         *   *  4.3.1 测试思路
             *  4.3.2 编写代码
             *  4.3.3 编译运行
             *  4.3.4 git 提交
             *  4.3.5 patch 校验
         *  4.4 Test point 4
         *   *  4.4.1 测试思路
             *  4.4.2 编写代码
             *  4.4.3 编译运行
             *  4.4.4 git 提交
             *  4.4.5 patch 校验
         *  4.5 Test point 5
         *   *  4.5.1 测试思路
             *  4.5.2 编写代码
             *  4.5.3 编译运行
             *  4.5.4 git 提交
             *  4.5.5 patch 校验
         *  4.6 总结

本章我们将结合前三章所学知识，开发一个完整的新规测试用例，在开始项目之前，请保证项目源码包的干净。

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

本章以编写 `_exit()` 函数为例，首先我们查看 `_exit()` 函数的 man-page，根据描述我们抽取出五个测试点，在本章中将依次实现它们。

![test][]

> 源码地址：[https://github.com/jitwxs/blog\_sample][https_github.com_jitwxs_blog_sample]

### 4.1 Test point 1 ###

#### 4.1.1 测试思路 ####

进程调用\_exit()后应该立即终止，因此可以测试该进程是否仍然存在。

![testpoint1][]

#### 4.1.2 编写代码 ####

在编写之前，首先我们要知道我们编写的\_exit()测试用例属于系统调用，因此我们在ltp的系统调用文件夹中新建\_exit文件夹，用于存放本章代码。

[wxs@bogon ltp]$ cd testcases/kernel/syscalls/
    [wxs@bogon syscalls]$ mkdir _exit
    [wxs@bogon syscalls]$ cd _exit
    [wxs@bogon _exit]$ pwd
    /home/wxs/ltp/testcases/kernel/syscalls/_exit

编写Makefile文件，用于编译本章的所有测试用例：

[wxs@bogon _exit]$ vim Makefile

#
    # Author : jitwxs <jitwxs@foxmail.com>
    #
    # This program is free software; you can redistribute it and/or
    # modify it under the terms of the GNU General Public License as
    # published by the Free Software Foundation; either version 2 of
    # the License, or (at your option) any later version.
    #
    # 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. See the
    # GNU General Public License for more details.
    # top_srcdir ?= ../../../..
    
    include $(top_srcdir)/include/mk/testcases.mk
    
    include $(top_srcdir)/include/mk/generic_leaf_target.mk

根据测试思路，编写\_exit01.c文件：

[wxs@bogon _exit]$ vim _exit01.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 : exit01 * * TEST TITLE : Basic tests for _exit(2) * * TEST CASE TOTAL : 1 * * AUTHOR : jitwxs * <jitwxs@foxmail.com> * * DESCRIPTION * After the process calls _exit() to test whether the process still * exists. * **********************************************************/
    
    #include <errno.h>
    #include <unistd.h>
    #include <sys/types.h>
    #include <signal.h>
    #include "tst_test.h"
    
    static void my_test(void)
    { 
        pid_t pid;
        int tmp;
    
        pid = SAFE_FORK();
        if (!pid) { 
            _exit(0);
        } else { 
            SAFE_WAITPID(pid, NULL, 0);
            tmp = kill(pid, 0);
            if (tmp != -1)
                tst_res(TFAIL | TERRNO, "_exit() Failed!");
            else
                tst_res(TPASS, "_exit() Success!");
        }
    }
    
    static struct tst_test test = { 
        .test_all = my_test,
        .forks_child = 1
    };

#### 4.1.3 编译运行 ####

[wxs@bogon _exit]$ 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  _exit01.c   -lltp -o _exit01

[wxs@bogon _exit]$ ./_exit01 
    tst_test.c:934: INFO: Timeout per run is 0h 05m 00s
    _exit01.c:50: PASS: _exit() Success!
    
    Summary:
    passed   1
    failed   0
    skipped  0
    warnings 0

#### 4.1.4 git 提交 ####

[wxs@bogon _exit]$ git add Makefile
    [wxs@bogon _exit]$ git add _exit01.c
    [wxs@bogon _exit]$ git status
    # 位于分支 mybranch
    # 要提交的变更：
    # （使用 "git reset HEAD <file>..." 撤出暂存区）
    #
    # 新文件： Makefile
    # 新文件： _exit01.c
    #
    # 未跟踪的文件:
    # （使用 "git add <file>..." 以包含要提交的内容）
    #
    # _exit01
    [wxs@bogon _exit]$ git commit -s -m "syscall/_exit: create _exit syscall and add _exit01 to test _exit(2)"
    [mybranch 932d1ad] syscall/_exit: create _exit syscall and add _exit01 to test _exit(2)
     2 files changed, 76 insertions(+)
     create mode 100644 testcases/kernel/syscalls/_exit/Makefile
     create mode 100644 testcases/kernel/syscalls/_exit/_exit01.c

因为该测试用例是第一次提交，所以我们提交 `_exit01.c` 和 `Makefile` 文件，后面就不需要提交 `Makefile` 文件了。

#### 4.1.5 patch 校验 ####

[wxs@bogon _exit]$ git format-patch -1
    0001-syscall-_exit-create-_exit-syscall-and-add-_exit01-t.patch
    [wxs@bogon _exit]$ ~/linux/scripts/checkpatch.pl 0001-syscall-_exit-create-_exit-syscall-and-add-_exit01-t.patch 
    WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
    #16: 
    new file mode 100644
    
    total: 0 errors, 1 warnings, 76 lines checked
    
    NOTE: For some of the reported defects, checkpatch may be able to
          mechanically convert to the typical style using --fix or --fix-inplace.
    
    0001-syscall-_exit-create-_exit-syscall-and-add-_exit01-t.patch has style problems, please review.
    
    NOTE: If any of the errors are false positives, please report
          them to the maintainer, see CHECKPATCH in MAINTAINERS.

### 4.2 Test point 2 ###

#### 4.2.1 测试思路 ####

进程调用\_exit()终止后，其子进程成为孤儿进程被init进程领养，因此可以测试该子进程的新父进程PID是否为1 。

![testpoint2][]

#### 4.2.2 编写代码 ####

根据测试思路，编写\_exit02.c文件：

[wxs@bogon _exit]$ vim _exit02.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 : exit02 * * TEST TITLE : Basic tests for _exit(2) * * TEST CASE TOTAL : 1 * * AUTHOR : jitwxs * <jitwxs@foxmail.com> * * DESCRIPTION * After the process call _exit () terminates, * tests if the child process's parent process PID is 1. * **********************************************************/
    
    #include <unistd.h>
    #include <sys/types.h>
    #include <signal.h>
    #include "tst_test.h"
    
    static void my_test(void)
    { 
        pid_t pid1, pid2;
    
        pid1 = SAFE_FORK();
    
        if (pid1 == 0) { 
            pid2 = SAFE_FORK();
            if (pid2 != 0)
                _exit(0);
            else { 
                usleep(10);
                if (getppid() == 1)
                    tst_res(TPASS, "_exit() Success!");
                else
                    tst_res(TFAIL | TERRNO, "_exit() Failed!");
                TST_CHECKPOINT_WAKE(0);
                _exit(0);
            }
        } else { 
            TST_CHECKPOINT_WAIT(0);
        }
    }
    
    static struct tst_test test = { 
        .test_all = my_test,
        .forks_child = 1,
        .needs_checkpoints = 1
    };

#### 4.2.3 编译运行 ####

[wxs@bogon _exit]$ ./_exit02
    tst_test.c:934: INFO: Timeout per run is 0h 05m 00s
    _exit02.c:48: PASS: _exit() Success!
    
    Summary:
    passed   1
    failed   0
    skipped  0
    warnings 0

#### 4.2.4 git 提交 ####

[wxs@bogon _exit]$ git add _exit02.c
    [wxs@bogon _exit]$ git commit -s -m "syscall/_exit: add _exit02 to test _exit(2)"
    [mybranch 4928275] syscall/_exit: add _exit02 to test _exit(2)
     1 file changed, 63 insertions(+)
     create mode 100644 testcases/kernel/syscalls/_exit/_exit02.c

#### 4.2.5 patch 校验 ####

[wxs@bogon _exit]$ git format-patch -2
    0001-syscall-_exit-create-_exit-syscall-and-add-_exit01-t.patch
    0002-syscall-_exit-add-_exit02-to-test-_exit-2.patch
    [wxs@bogon _exit]$ ~/linux/scripts/checkpatch.pl 0002-syscall-_exit-add-_exit02-to-test-_exit-2.patch 
    WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
    #13: 
    new file mode 100644
    
    total: 0 errors, 1 warnings, 63 lines checked
    
    NOTE: For some of the reported defects, checkpatch may be able to
          mechanically convert to the typical style using --fix or --fix-inplace.
    
    0002-syscall-_exit-add-_exit02-to-test-_exit-2.patch has style problems, please review.
    
    NOTE: If any of the errors are false positives, please report
          them to the maintainer, see CHECKPATCH in MAINTAINERS.

### 4.3 Test point 3 ###

#### 4.3.1 测试思路 ####

进程调用\_exit()终止后，其父进程被发送了SIGCHLD信号，因此可以测试该父进程是否真的收到了SIGCHLD信号。

![testpoint3][]

#### 4.3.2 编写代码 ####

根据测试思路，编写\_exit03.c文件：

[wxs@bogon _exit]$ vim _exit03.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 : exit03 * * TEST TITLE : Basic tests for _exit(2) * * TEST CASE TOTAL : 1 * * AUTHOR : jitwxs * <jitwxs@foxmail.com> * * DESCRIPTION * After the process call _exit () terminates, * it tests if the parent process received the SIGCHLD signal. * **********************************************************/
    
    #include <sys/types.h>
    #include <signal.h>
    #include "tst_test.h"
    #include <stdio.h>
    
    int global_value = 1;
    
    void check_call(int sig)
    { 
        if (sig == SIGCHLD)
            global_value = 10;
    }
    
    static void my_test(void)
    { 
        pid_t pid;
        int status;
    
        pid = SAFE_FORK();
    
        if (pid == 0)
            _exit(0);
        else { 
            signal(SIGCHLD, check_call);
            SAFE_WAIT(&status);
            if (global_value == 1)
                tst_res(TFAIL | TERRNO, "_exit() Failed!");
            else if (global_value == 10)
                tst_res(TPASS, "_exit() Success!");
        }
    }
    
    static struct tst_test test = { 
        .test_all = my_test,
        .forks_child = 1
    };

#### 4.3.3 编译运行 ####

[wxs@bogon _exit]$ ./_exit03
    tst_test.c:934: INFO: Timeout per run is 0h 05m 00s
    _exit03.c:58: PASS: _exit() Success!
    
    Summary:
    passed   1
    failed   0
    skipped  0
    warnings 0

#### 4.3.4 git 提交 ####

[wxs@bogon _exit]$ git add _exit03.c
    [wxs@bogon _exit]$ git commit -s -m "syscall/_exit: add _exit03 to test _exit(2)"
    [mybranch eba459a] syscall/_exit: add _exit03 to test _exit(2)
     1 file changed, 65 insertions(+)
     create mode 100644 testcases/kernel/syscalls/_exit/_exit03.c

#### 4.3.5 patch 校验 ####

[wxs@bogon _exit]$ git format-patch -3
    0001-syscall-_exit-create-_exit-syscall-and-add-_exit01-t.patch
    0002-syscall-_exit-add-_exit02-to-test-_exit-2.patch
    0003-syscall-_exit-add-_exit03-to-test-_exit-2.patch
    [wxs@bogon _exit]$ ~/linux/scripts/checkpatch.pl 0003-syscall-_exit-add-_exit03-to-test-_exit-2.patch 
    WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
    #13: 
    new file mode 100644
    
    total: 0 errors, 1 warnings, 65 lines checked
    
    NOTE: For some of the reported defects, checkpatch may be able to
          mechanically convert to the typical style using --fix or --fix-inplace.
    
    0003-syscall-_exit-add-_exit03-to-test-_exit-2.patch has style problems, please review.
    
    NOTE: If any of the errors are false positives, please report
          them to the maintainer, see CHECKPATCH in MAINTAINERS.

### 4.4 Test point 4 ###

#### 4.4.1 测试思路 ####

进程调用\_exit()时所带参数值，应该作为该进程的退出值，能被其父进程的wait()获得，因此可以测试该值是否匹配。

![testpoint4][]

#### 4.4.2 编写代码 ####

根据测试思路，编写\_exit04.c文件：

[wxs@bogon _exit]$ vim _exit04.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 : exit04 * * TEST TITLE : Basic tests for _exit(2) * * TEST CASE TOTAL : 5 * * AUTHOR : jitwxs * <jitwxs@foxmail.com> * * DESCRIPTION * The process calls _exit () to append the parameter value and test * whether the value was obtained from the parent's wait (). * **********************************************************/
    
    #include <unistd.h>
    #include <sys/types.h>
    #include <sys/wait.h>
    #include <signal.h>
    #include "tst_test.h"
    
    static struct tcase { 
        const int input;
        const int output;
    } tcases[] = { 
        { 0, 0},
        { 10, 10},
        { 128, 128},
        { 256, 0},
        { 288, 32}
    };
    
    static void my_test(unsigned int n)
    { 
        struct tcase *tc = &tcases[n];
        pid_t pid;
        int status;
    
        if (!SAFE_FORK()) { 
            pid = SAFE_FORK();
            if (pid == 0)
                _exit(tc->input);
            else { 
                SAFE_WAITPID(pid, &status, 0);
                if (WEXITSTATUS(status) != tc->output)
                    tst_res(TFAIL | TERRNO, "_exit() Failed!");
                else
                    tst_res(TPASS, "_exit() Success!");
                TST_CHECKPOINT_WAKE(0);
                _exit(0);
            }
        } else { 
            TST_CHECKPOINT_WAIT(0);
        }
    }
    
    static struct tst_test test = { 
        .tcnt = ARRAY_SIZE(tcases),
        .test = my_test,
        .forks_child = 1,
        .needs_checkpoints = 1
    };

#### 4.4.3 编译运行 ####

[wxs@bogon _exit]$ ./_exit04
    tst_test.c:934: INFO: Timeout per run is 0h 05m 00s
    _exit04.c:62: PASS: _exit() Success!
    _exit04.c:62: PASS: _exit() Success!
    _exit04.c:62: PASS: _exit() Success!
    _exit04.c:62: PASS: _exit() Success!
    _exit04.c:62: PASS: _exit() Success!
    
    Summary:
    passed   5
    failed   0
    skipped  0
    warnings 0

#### 4.4.4 git 提交 ####

[wxs@bogon _exit]$ git add _exit04.c
    [wxs@bogon _exit]$ git commit -s -m "syscall/_exit: add _exit04 to test _exit(2)"
    [mybranch c1cdcaf] syscall/_exit: add _exit04 to test _exit(2)
     1 file changed, 76 insertions(+)
     create mode 100644 testcases/kernel/syscalls/_exit/_exit04.c

#### 4.4.5 patch 校验 ####

[wxs@bogon _exit]$ git format-patch -4
    0001-syscall-_exit-create-_exit-syscall-and-add-_exit01-t.patch
    0002-syscall-_exit-add-_exit02-to-test-_exit-2.patch
    0003-syscall-_exit-add-_exit03-to-test-_exit-2.patch
    0004-syscall-_exit-add-_exit04-to-test-_exit-2.patch
    [wxs@bogon _exit]$ ~/linux/scripts/checkpatch.pl 0004-syscall-_exit-add-_exit04-to-test-_exit-2.patch 
    WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
    #13: 
    new file mode 100644
    
    total: 0 errors, 1 warnings, 76 lines checked
    
    NOTE: For some of the reported defects, checkpatch may be able to
          mechanically convert to the typical style using --fix or --fix-inplace.
    
    0004-syscall-_exit-add-_exit04-to-test-_exit-2.patch has style problems, please review.
    
    NOTE: If any of the errors are false positives, please report
          them to the maintainer, see CHECKPATCH in MAINTAINERS.

### 4.5 Test point 5 ###

#### 4.5.1 测试思路 ####

进程调用\_exit()终止时不会像调用exit(3)一样调用atexit(3)或on\_exit(3)，因此可以测试是否回调了atexit(3)中注册的函数 。  
![testpoint5][]

#### 4.5.2 编写代码 ####

根据测试思路，编写\_exit05.c文件：

[wxs@bogon _exit]$ vim _exit05.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 : exit05 * * TEST TITLE : Basic tests for _exit(2) * * TEST CASE TOTAL : 1 * * AUTHOR : jitwxs * <jitwxs@foxmail.com> * * DESCRIPTION * When process call _exit () terminates, atexit (3) or on_exit (3) is * not called as it did for exit (3), so you can test whether the * function registered in atexit (3) is called back. * **********************************************************/
    
    #include <stdlib.h>
    #include <sys/types.h>
    #include <sys/wait.h>
    #include <signal.h>
    #include "tst_test.h"
    #include <stdlib.h>
    
    #define TMPFILE "tmpFile"
    
    void check_call(void)
    { 
        SAFE_TOUCH(TMPFILE, 0777, NULL);
    }
    
    static void my_test(void)
    { 
        if (!SAFE_FORK()) { 
            atexit(check_call);
            _exit(0);
        } else { 
            SAFE_WAIT(NULL);
            if (access(TMPFILE, F_OK) != 0)
                tst_res(TPASS, "_exit() Success!");
            else
                tst_res(TFAIL|TERRNO, "_exit() Failed!");
        }
    }
    
    static struct tst_test test = { 
        .needs_tmpdir = 1,
        .test_all = my_test,
        .forks_child = 1
    };

#### 4.5.3 编译运行 ####

[wxs@bogon _exit]$ ./_exit05 
    tst_test.c:934: INFO: Timeout per run is 0h 05m 00s
    _exit05.c:52: PASS: _exit() Success!
    
    Summary:
    passed   1
    failed   0
    skipped  0
    warnings 0

#### 4.5.4 git 提交 ####

[wxs@bogon _exit]$ git add _exit05.c
    [wxs@bogon _exit]$ git commit -s -m "syscall/_exit: add _exit05 to test _exit(2)"
    [mybranch 5a42282] syscall/_exit: add _exit05 to test _exit(2)
     1 file changed, 62 insertions(+)
     create mode 100644 testcases/kernel/syscalls/_exit/_exit05.c

#### 4.5.5 patch 校验 ####

[wxs@bogon _exit]$ git format-patch -5
    0001-syscall-_exit-create-_exit-syscall-and-add-_exit01-t.patch
    0002-syscall-_exit-add-_exit02-to-test-_exit-2.patch
    0003-syscall-_exit-add-_exit03-to-test-_exit-2.patch
    0004-syscall-_exit-add-_exit04-to-test-_exit-2.patch
    0005-syscall-_exit-add-_exit05-to-test-_exit-2.patch
    [wxs@bogon _exit]$ ~/linux/scripts/checkpatch.pl 0005-syscall-_exit-add-_exit05-to-test-_exit-2.patch 
    WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
    #13: 
    new file mode 100644
    
    total: 0 errors, 1 warnings, 62 lines checked
    
    NOTE: For some of the reported defects, checkpatch may be able to
          mechanically convert to the typical style using --fix or --fix-inplace.
    
    0005-syscall-_exit-add-_exit05-to-test-_exit-2.patch has style problems, please review.
    
    NOTE: If any of the errors are false positives, please report
          them to the maintainer, see CHECKPATCH in MAINTAINERS.

### 4.6 总结 ###

通过完成上面五个测试点的编写，当前目录内容如下：

[wxs@bogon _exit]$ pwd
    /home/wxs/ltp/testcases/kernel/syscalls/_exit
    [wxs@bogon _exit]$ ls
    0001-syscall-_exit-create-_exit-syscall-and-add-_exit01-t.patch  _exit02.c
    0002-syscall-_exit-add-_exit02-to-test-_exit-2.patch             _exit03
    0003-syscall-_exit-add-_exit03-to-test-_exit-2.patch             _exit03.c
    0004-syscall-_exit-add-_exit04-to-test-_exit-2.patch             _exit04
    0005-syscall-_exit-add-_exit05-to-test-_exit-2.patch             _exit04.c
    _exit01                                                          _exit05
    _exit01.c                                                        _exit05.c
    _exit02                                                          Makefile

至此该用例已完全编写完毕。注意，该文件夹中的`*.patch`文件请移除ltp文件夹，不要放在这里，我只是为了演示方便生成在了这里。

[LTP]: http://blog.csdn.net/yuanlaijike/article/details/78068331
[_Shell]: http://blog.csdn.net/yuanlaijike/article/details/78138487
[Link 1]: http://blog.csdn.net/yuanlaijike/article/details/78188206
[_exit]: http://blog.csdn.net/yuanlaijike/article/details/78368043
[_IO]: http://blog.csdn.net/yuanlaijike/article/details/78505940
[_IO 1]: http://blog.csdn.net/yuanlaijike/article/details/78639068
[test]: /images/20220606/100755dc0dd443a4ae61a6cb7c22ed6e.png
[https_github.com_jitwxs_blog_sample]: https://github.com/jitwxs/blog_sample
[testpoint1]: /images/20220606/7600d4c82b954dd4be08a8331e97574b.png
[testpoint2]: /images/20220606/df18725263e6471b9a42e6e2809a94fe.png
[testpoint3]: /images/20220606/487361e855094e4faa5542b1e07ad253.png
[testpoint4]: /images/20220606/d6f49e8182ba43969c594326470756fc.png
[testpoint5]: /images/20220606/401c765406b54af5bbcd9fcbd117f3ad.png