184

我有一个 Bash 脚本，它构建一个字符串以作为命令运行

脚本：

#! /bin/bash

matchdir="/home/joao/robocup/runner_workdir/matches/testmatch/"

teamAComm="`pwd`/a.sh"
teamBComm="`pwd`/b.sh"
include="`pwd`/server_official.conf"
serverbin='/usr/local/bin/rcssserver'

cd $matchdir
illcommando="$serverbin include='$include' server::team_l_start = '${teamAComm}' server::team_r_start = '${teamBComm}' CSVSaver::save='true' CSVSaver::filename = 'out.csv'"

echo "running: $illcommando"
# $illcommando > server-output.log 2> server-error.log
$illcommando

这似乎没有正确地向$serverbin.

脚本输出：

running: /usr/local/bin/rcssserver include='/home/joao/robocup/runner_workdir/server_official.conf' server::team_l_start = '/home/joao/robocup/runner_workdir/a.sh' server::team_r_start = '/home/joao/robocup/runner_workdir/b.sh' CSVSaver::save='true' CSVSaver::filename = 'out.csv'
rcssserver-14.0.1

Copyright (C) 1995, 1996, 1997, 1998, 1999 Electrotechnical Laboratory.
2000 - 2009 RoboCup Soccer Simulator Maintenance Group.


Usage: /usr/local/bin/rcssserver [[-[-]]namespace::option=value]
                                 [[-[-]][namespace::]help]
                                 [[-[-]]include=file]
Options:
    help
        display generic help

    include=file
        parse the specified configuration file.  Configuration files
        have the same format as the command line options. The
        configuration file specified will be parsed before all
        subsequent options.

    server::help
        display detailed help for the "server" module

    player::help
        display detailed help for the "player" module

    CSVSaver::help
        display detailed help for the "CSVSaver" module

CSVSaver Options:
    CSVSaver::save=<on|off|true|false|1|0|>
        If save is on/true, then the saver will attempt to save the
        results to the database.  Otherwise it will do nothing.

        current value: false

    CSVSaver::filename='<STRING>'
        The file to save the results to.  If this file does not
        exist it will be created.  If the file does exist, the results
        will be appended to the end.

        current value: 'out.csv'

如果我只是粘贴命令/usr/local/bin/rcssserver include='/home/joao/robocup/runner_workdir/server_official.conf' server::team_l_start = '/home/joao/robocup/runner_workdir/a.sh' server::team_r_start = '/home/joao/robocup/runner_workdir/b.sh' CSVSaver::save='true' CSVSaver::filename = 'out.csv'（在“运行：”之后的输出中）它工作正常。

4

8 回答 8

327

你可以eval用来执行一个字符串：

eval $illcommando
于 2010-03-01T10:52:19.313 回答
29 
your_command_string="..."
output=$(eval "$your_command_string")
echo "$output"
于 2018-06-02T00:42:03.293 回答
28

我通常将命令放在括号中$(commandStr)，如果这不能帮助我发现 bash 调试模式很好，请运行脚本bash -x script

于 2010-03-01T10:39:36.017 回答
12

不要将您的命令放入变量中，只需运行它

matchdir="/home/joao/robocup/runner_workdir/matches/testmatch/"
PWD=$(pwd)
teamAComm="$PWD/a.sh"
teamBComm="$PWD/b.sh"
include="$PWD/server_official.conf"
serverbin='/usr/local/bin/rcssserver'    
cd $matchdir
$serverbin include=$include server::team_l_start = ${teamAComm} server::team_r_start=${teamBComm} CSVSaver::save='true' CSVSaver::filename = 'out.csv'
于 2010-03-01T10:50:59.493 回答
3

./me 施放 raise_dead()

我一直在寻找这样的东西，但我还需要重用相同的字符串减去两个参数，所以我最终得到了类似的东西：

my_exe ()
{
    mysql -sN -e "select $1 from heat.stack where heat.stack.name=\"$2\";"
}

这是我用来监控 openstack 热堆栈创建的东西。在这种情况下，我期望两个条件，一个操作“CREATE”和一个名为“Somestack”的堆栈上的状态“COMPLETE”

要获得这些变量，我可以执行以下操作：

ACTION=$(my_exe action Somestack)
STATUS=$(my_exe status Somestack)
if [[ "$ACTION" == "CREATE" ]] && [[ "$STATUS" == "COMPLETE" ]]
...
于 2016-07-17T06:31:14.900 回答
0

这是我的 gradle 构建脚本，它执行存储在 heredocs 中的字符串：

current_directory=$( realpath "." )
GENERATED=${current_directory}/"GENERATED"
build_gradle=$( realpath build.gradle )

## touch because .gitignore ignores this folder:
touch $GENERATED

COPY_BUILD_FILE=$( cat <<COPY_BUILD_FILE_HEREDOC

    cp 
        $build_gradle 
        $GENERATED/build.gradle

COPY_BUILD_FILE_HEREDOC
)
$COPY_BUILD_FILE

GRADLE_COMMAND=$( cat <<GRADLE_COMMAND_HEREDOC

    gradle run

        --build-file       
            $GENERATED/build.gradle

        --gradle-user-home 
            $GENERATED  

        --no-daemon

GRADLE_COMMAND_HEREDOC
)
$GRADLE_COMMAND

孤独的“）”有点丑陋。但我不知道如何解决这个审美方面的问题。

于 2019-05-23T18:27:20.143 回答
0

要查看脚本正在执行的所有命令，请将-x标志添加到您的 shabang 行，然后正常执行命令：

#! /bin/bash -x

matchdir="/home/joao/robocup/runner_workdir/matches/testmatch/"

teamAComm="`pwd`/a.sh"
teamBComm="`pwd`/b.sh"
include="`pwd`/server_official.conf"
serverbin='/usr/local/bin/rcssserver'

cd $matchdir
$serverbin include="$include" server::team_l_start="${teamAComm}" server::team_r_start="${teamBComm}" CSVSaver::save='true' CSVSaver::filename='out.csv'

然后，如果您有时想忽略调试输出，请重定向stderr到某个地方。

于 2020-07-15T09:40:31.580 回答
0

对我来说echo XYZ_20200824.zip | grep -Eo '[[:digit:]]{4}[[:digit:]]{2}[[:digit:]]{2}' 工作正常，但无法将命令输出存储到变量中。我有同样的问题，我试过eval但没有输出。

这是我的问题的答案： cmd=$(echo XYZ_20200824.zip | grep -Eo '[[:digit:]]{4}[[:digit:]]{2}[[:digit:]]{2}')

echo $cmd

我的输出现在是20200824

于 2020-08-25T13:57:23.420 回答