Question

我正在尝试在没有ssh公钥的服务器的一定时间后在perl脚本中的scp命令期间退出密码输入提示。在这个脚本中，我使用后退标记将文件从一个服务器复制到另一个服务器，但脚本卡在密码提示符上，即使在指定的超时后也不会退出。

my $test       = '';
my $exit_value = '';
eval {
          my $timeout = 2;
          local $SIG{ALRM} = sub { die "timeout\n" };
          alarm($timeout);
          $test       = `scp foo.txt bar@baz:/`;
          $exit_value = $? >> 8;
          alarm(0);
     }

if ($@) {
    print "Time out";
}

有没有办法处理上述情况？

Answer 1

从非交互式会话调用时，应设置BatchMode以完全禁用密码提示。

$test = `scp -o BatchMode=yes foo.txt bar@baz:/`;

见下文

 BatchMode
         If set to ``yes'', passphrase/password querying will be disabled.
         This option is useful in scripts and other batch jobs where no
         user is present to supply the password.  The argument must be
         ``yes'' or ``no''.  The default is ``no''.

Answer 2

您还可以使用以下参数禁用host_key检查： -

$ test = scp -o BatchMode = yes -o StrictHostKeyChecking = no foo.txt bar @ baz：/;

Answer 3

我使用Picked up JAVA_TOOL_OPTIONS: -javaagent:/usr/share/java/jayatanaag.jar Buildfile: /home/jordi/NetBeansProjects/geneal/build.xml -pre-init: -init-private: -init-user: -init-project: -init-macrodef-property: -do-init: -post-init: -init-check: -init-ap-cmdline-properties: -init-macrodef-javac-with-processors: -init-macrodef-javac-without-processors: -init-macrodef-javac: -init-macrodef-test-impl: -init-macrodef-junit-init: -init-macrodef-junit-single: -init-test-properties: -init-macrodef-junit-batch: -init-macrodef-junit: -init-macrodef-junit-impl: -init-macrodef-testng: -init-macrodef-testng-impl: -init-macrodef-test: -init-macrodef-junit-debug: -init-macrodef-junit-debug-batch: -init-macrodef-junit-debug-impl: -init-macrodef-test-debug-junit: -init-macrodef-testng-debug: -init-macrodef-testng-debug-impl: -init-macrodef-test-debug-testng: -init-macrodef-test-debug: -init-debug-args: -init-macrodef-nbjpda: -init-macrodef-debug: -init-macrodef-java: -init-presetdef-jar: -init-ap-cmdline-supported: -init-ap-cmdline: init: -deps-clean-init: deps-clean: -warn-already-built-clean: [propertyfile] Updating property file: /home/jordi/NetBeansProjects/geneal/build/built-clean.properties -do-clean: [delete] Deleting directory /home/jordi/NetBeansProjects/geneal/build -post-clean: clean: -pre-init: -init-private: -init-user: -init-project: -init-macrodef-property: -do-init: -post-init: -init-check: -init-ap-cmdline-properties: -init-macrodef-javac-with-processors: -init-macrodef-javac-without-processors: -init-macrodef-javac: -init-macrodef-test-impl: -init-macrodef-junit-init: -init-macrodef-junit-single: -init-test-properties: -init-macrodef-junit-batch: -init-macrodef-junit: -init-macrodef-junit-impl: -init-macrodef-testng: -init-macrodef-testng-impl: -init-macrodef-test: -init-macrodef-junit-debug: -init-macrodef-junit-debug-batch: -init-macrodef-junit-debug-impl: -init-macrodef-test-debug-junit: -init-macrodef-testng-debug: -init-macrodef-testng-debug-impl: -init-macrodef-test-debug-testng: -init-macrodef-test-debug: -init-debug-args: -init-macrodef-nbjpda: -init-macrodef-debug: -init-macrodef-java: -init-presetdef-jar: -init-ap-cmdline-supported: -init-ap-cmdline: init: -deps-jar-init: deps-jar: [mkdir] Created dir: /home/jordi/NetBeansProjects/geneal/build -warn-already-built-jar: [propertyfile] Updating property file: /home/jordi/NetBeansProjects/geneal/build/built-jar.properties -check-automatic-build: -clean-after-automatic-build: -verify-automatic-build: -pre-pre-compile: [mkdir] Created dir: /home/jordi/NetBeansProjects/geneal/build/classes -pre-compile: -copy-persistence-xml: -compile-depend: -do-compile: [mkdir] Created dir: /home/jordi/NetBeansProjects/geneal/build/empty [mkdir] Created dir: /home/jordi/NetBeansProjects/geneal/build/generated-sources/ap-source-output [javac] Compiling 30 source files to /home/jordi/NetBeansProjects/geneal/build/classes [copy] Copying 1 file to /home/jordi/NetBeansProjects/geneal/build/classes [copy] Copied 5 empty directories to 5 empty directories under /home/jordi/NetBeansProjects/geneal/build/classes -post-compile: compile: -pre-jar: -pre-pre-jar: [mkdir] Created dir: /home/jordi/NetBeansProjects/geneal/dist -do-jar-create-manifest: -do-jar-copy-manifest: [copy] Copying 1 file to /home/jordi/NetBeansProjects/geneal/build -do-jar-set-mainclass: -do-jar-set-profile: -do-jar-set-splashscreen: -do-jar-jar: -init-macrodef-copylibs: -do-jar-copylibs: [copylibs] Copy libraries to /home/jordi/NetBeansProjects/geneal/dist/lib. [copylibs] Building jar: /home/jordi/NetBeansProjects/geneal/dist/geneal.jar [echo] To run this application from the command line without Ant, try: [echo] java -jar "/home/jordi/NetBeansProjects/geneal/dist/geneal.jar" -do-jar-delete-manifest: -do-jar-without-libraries: -do-jar-with-libraries: -post-jar: -do-jar: jar: BUILD SUCCESSFUL Total time: 1 second module来实现上述目标，在一定时间后终止密码提示。

所以我当前的代码看起来像这样

IPC::Run

在一段时间后在perl中的scp期间终止密码提示

3 个答案: