/bin/bash die() { echo >&2 -e "\nERROR: $@\n"; exit 1; } run() { "$@"; code=$?; [ $code -ne 0 ] && die "command [$*] failed with error code $code"; } case "1" in "1") run ls /opt run ls /wrong-dir ;; esac 输出: $ ./test.sh apacheds google iptables ...
(If n is omitted, the exit status is that of the last command executed. ) 格式:$? 上一个命令的退出码。 格式:trap "commands" EXIT 退出时执行commands指定的命令。( A trap on EXIT is executed before the shell terminates.) 退出码(exit status,或exit code)的约定: 0表示成功(Zero - Success...
exit 0 # Exit with code 0 indicating success Output: ad@DESKTOP-3KE0KU4:~$ ./test1.sh 12 3 Result of division: 4.00 ad@DESKTOP-3KE0KU4:~$ ./test1.sh 12 0 Error: Division by zero ad@DESKTOP-3KE0KU4:~$ ./test1.sh 0 12 Result of division: 0 Explanation: In the exercise ab...
(If n is omitted, the exit status is that of the last command executed. ) 格式:$? 上一个命令的退出码。 格式:trap "commands" EXIT 退出时执行commands指定的命令。( A trap on EXIT is executed before the shell terminates.) 退出码(exit status,或exit code)的约定: 0表示成功(Zero - Success...
pahaz/bashtest master BranchesTags Code Folders and files Name Last commit message Last commit date Latest commit History 41 Commits testsuit .gitignore LICENSE MANIFEST.in README.rst bashtest.py circle.yml setup.py test_ls.bashtest test_ls_extra.bashtest...
of the last child in the pipeline is the significant one. If the command or job was terminated by a signal, note that value also. */ termination_state = (job != NO_JOB) ?job_exit_status(job)一般通过这个流程来确定返回值。 :process_exit_status(child->status); ...
查找/列出进程很容易，但干掉进程得借助系统命令ntsd.exe，详细用法见下面的代码 : using System; ...
文件名: /tmp/mytest.txt 请输入内容,输入END结束 > Hello World! > 2nd line. > 3rd line. > END ]# cat /tmp/mytest.txt Hello World! 2nd line. 3rd line. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 字符串详解 序列
...步骤一:进入Hive命令行首先,在Linux终端中,通过以下命令启动Hive并进入Hive命令行界面:bashCopy codehive步骤二:执行Hive命令在Hive命令行界面中,我们可以执行各种Hive...步骤三:退出Hive命令行方法一:使用exit;命令退出在Hive命令行界面中,输入以下命令并按下回车键:sqlCopy codeexit;这将会退出Hive命令行界面,...
exec {sleep_fd}<> <(:) while some_quick_test; do # equivalent of sleep 0.001 read -t 0.001 -u $sleep_fd done检查一个命令是否在用户的PATH中# 有3种方法可以使用,任何一种都正确。 type -p executable_name &>/dev/null hash executable_name &>/dev/null command -v executable_name &>/...