read monthname case $monthname in ## convert $monthname to number [Jj][Aa][Nn]*) month=1 ;; [Ff][Ee][Bb]*) month=2 ;; ## ...put the rest of the year here [Dd][Ee][Cc]*) month=12 ;; [1-9]|1[0-2]) month=$monthname ;; ## accept number if entered *) echo "Inva...
While ShellCheck is mostly intended for interactive use, it can easily be added to builds or test suites. It makes canonical use of exit codes, so you can just add ashellcheckcommand as part of the process. For example, in a Makefile: check-scripts:# Fail if any of these files have w...
} #Check the number of arguments. If none are passed, print help and exit. NUMARGS=$# echo -e \\n"Number of arguments: $NUMARGS" if [ $NUMARGS -eq 0 ]; then HELP fi ### Start getopts code ### #Parse command line flags #如果选项需要后跟参数,在选项后面加":" #注意"-h"选项...
} #Check the number of arguments. If none are passed, print help and exit. NUMARGS=$# echo -e \\n"Number of arguments: $NUMARGS" if [ $NUMARGS -eq 0 ]; then HELP fi ### Start getopts code ### #Parse command line flags #如果选项需要后跟参数,在选项后面加":" #注意"-h"选项...
# line number.echo"Example of error with line number and message" error_exit"$LINENO: An error has occurred."在bash脚本中有更好的错误处理例程吗?相关讨论 请参阅这个详细的答案:在bash脚本中引发错误。 请参阅以下日志记录和错误处理实现:github.com/codeforester/base/blob/master/lib/stdlib.sh使用...
这一行表明,不管用户选择的是那种交互式shell,该脚本需要使用bash shell来运行。由于每种shell的语法大不相同,所以这句非常重要。 简单实例 下面是一个非常简单的shell脚本。它只是运行了几条简单的命令 1 2 3 4 #!/bin/bash echo"hello, $USER. I wish to list some files of yours" ...
上面的脚本将等待所有生成的10个子进程,但它始终给出退出状态0(参见help wait)。如何修改此脚本,以便它在任何子进程以代码结束时发现生成的子进程的退出状态并返回退出代码1!= 0? 有没有比收集子流程的PID、按顺序等待它们并求和退出状态更好的解决方案?
在bash中创建scp命令可以使用以下步骤: 1. 打开终端或命令行界面。 2. 输入以下命令来创建一个新的bash脚本文件: ``` nano myscp.sh ``` 这...
*) die "Unknown option: $1" ;; *) break ;; esac shift done args=("$@") # check required params and arguments [[ -z "${param-}" ]] && die "Missing required parameter: param" [[ ${#args[@]} -eq 0 ]] && die "Missing script arguments" return 0}parse...
The args are taken from STRING. If either FIRST or LAST is < 0, then make that arg count from the right (subtract from the number of tokens, so that FIRST = -1 means the next to last token on the line). If LAST is `$' the last arg from STRING is used. */char*history_arg_...