OLDPWD The previous working directory as set by the cd com- mand. OPTARG The value of the last option argument processed by the getopts builtin command (see SHELL BUILTIN COMMANDS below). OPTIND The index of the next argument to be processed by the getopts builtin command (see SHELL BUILT...
If you usegetoptionsinstead ofgetoptsfor option parsing,OPTARGandOPTINDare not needed. In addition, you can also usegetopts, sinceOPTARGandOPTINDwill be correctly reset after use. If you still don't like it, you can use the--optargand--optindoptions ofgengetoptionsto change the variable name...
The parameters provided tosshare not transferred to the remote command one by one. Instead, they are combined into a single string and transferred tosh -c. The output generated byprintf %qmay not be compatible with all POSIX-derived shells. It will only be compatible with the same shell that...
To point out and clarify typical intermediate level semantic problems that cause a shell to behave strangely and counter-intuitively. To point out subtle caveats, corner cases and pitfalls that may cause an advanced user's otherwise working script to fail under future circumstances. Seethe gallery o...
_init_completion() { local was_split _comp_initialize "$@" local rc=$? # When -s is specified, convert "split={set,}" to "split={true,false}" local flag OPTIND=1 OPTARG="" OPTERR=0 while getopts "n:e:o:i:s" flag "$@"; do case $flag in [neoi]) ;; s) if [[ $...
forceGb=no # might not be needed; probably always safepostRun= # no additional commands to run# program controlquit_flag=no # signal program exitsleepNow=no # force immediate sleep now# options to overwrite defaultswhile getopts "acnN:i:I:d:h:m:t:e:C:w:RFqVSLlb:p:D:" opt; do...
Bash scripting is something you cannot neglect if you are working in a Linux environment. If you already have programming experience, learning bash will not be a hurdle. For any feedback use the comment section and we will be happy to hear from you. ...
如何在bash中使用getopts /myscript #should display help 我的需求是: 在这里使用 getopts 获取输入参数。 检查是否存在 -s 参数,如果不存在则返回错误。.../bin/bash while getopts "h:s:" arg; do case $arg in h) echo "usage" ;; s)...如何在 Bash 中使用 getopts? 回答 原始代码的问题是: h...
same way one might pass an option to a shell command (e.g.ls -l). In effect,function argumentsin Bash are treated aspositional parameters($1, $2..$9, ${10}, ${11}, and so on). This is no surprise considering howgetoptsworks. Do not use parentheses to call a function in Bash...
11-19. 使用getopts命令来读取传递给脚本的选项/参数.11-20. "Including"一个数据文件11-21. 一个没什么用的,source自身的脚本11-22. exec的效果11-23. 一个exec自身的脚本11-24. 在继续处理之前,等待一个进程的结束11-25. 一个结束自身的脚本.