Linux learning path using scripts to copy binaries and required library files

The special syntax of Bash is introduced first

${parameter#*word}

Where parameter is a variable, word is a delimiter, which means that the string from the leftmost left character of the variable to the first match to the delimiter (word) is removed

${parameter##*word}: Indicates that the string from the leftmost character of the variable to the last match to the delimiter is stripped off

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Note: Do not add the $ sign to the variable

When * in front of the delimiter (word), indicates that the match is started from the left

When * is followed by a delimiter (word), the match is started from right

${parameter%word*}: Indicates that the string from the rightmost character start to the first match to the delimiter is all removed

${parameter%%word*}: Indicates that the string from the beginning of the rightmost character to the last match to the delimiter is all removed

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How to use a script to complete a copy of a binary program and required library files

#!/bin/bash
Dest=/mnt/sysroot
#复制库文件
LIBCP () {
libdir=${1%/*}
#判断目录是否存在, does not exist the directory is created
[!-D $DEST $libdir] && mkdir-p $DEST $libdir
#判断库文件是否存在, does not exist copy the library file to the specified directory
[!-e $DEST ${1}] && cp ${1} $DEST $libdir && echo "Copy lib $ finished"

}
#复制二进制程序
CMDCP () {

#找到某个命令的二进制文件
Cmd= ' which $ | Grep-v ' ^alias* ' | Grep-o ' [^[:space:]]\{1,\} '
cmddir=${cmd%/*}
#判断这个二进制文件所在目录是否存在, does not exist then creates
[!-D $DEST $cmddir] && mkdir-p $DEST $cmddir
#判断指定目录下是否存在该二进制程序, does not exist copy
[!-e $DEST #cmd] && cp $CMD $DEST $cmddir && echo "Copy command $CMD finished"
#通过ldd命令来找到某个二进制文件所需要的库文件 and generate a list for the For loop use
For BINARY in ' LDD $CMD | Grep-o--color '/.*lib\ (64\) \?/[^[:space:]]\{1,\} ';d o
LIBCP $BINARY
Done
}
#提醒用户输入命令
Read-p ' pelase input command: ' COM
#判断用户输入的命令是否正确
until [$COM = = ' Q '];d o
! Which $COM &>/dev/null && Echo ' command wrong! ' && read-p ' input again: ' COM \
&& continue
CMDCP $COM

Read-p ' pelase input command: ' COM
Done

This article from the "Linux Learning Path" blog, declined reprint!