使用Groovy获取进程的PID

使用Groovy获取进程的PID,groovy,Groovy,我试图在Groovy中创建一个方法来获取应用程序的进程ID。我目前处于这个阶段: String getProcessIdFor(String program) { def buffer = new StringBuffer() Process commandOne = 'ps -A'.execute() Process commandTwo = "grep -m1 '${program}'".execute() Process commandThree = "a

我试图在Groovy中创建一个方法来获取应用程序的进程ID。我目前处于这个阶段:

String getProcessIdFor(String program) {
    def buffer = new StringBuffer()

    Process commandOne = 'ps -A'.execute()
    Process commandTwo = "grep -m1 '${program}'".execute()
    Process commandThree = "awk '{print \$1}'".execute()

    Process process = commandOne | commandTwo | commandThree
    process.waitForProcessOutput(buffer, buffer)

    return buffer.toString()
}
但这给了我:

Exception in thread "Thread-1" groovy.lang.GroovyRuntimeException: exception while reading process stream
awk: syntax error at source line 1
at org.codehaus.groovy.runtime.ProcessGroovyMethods$3.run(ProcessGroovyMethods.java:402)
context is
at java.lang.Thread.run(Thread.java:745)
 >>> ' <<< 
missing }
Caused by: java.io.IOException: Stream closed
awk: bailing out at source line 1
at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:434)
at java.io.OutputStream.write(OutputStream.java:116)
at java.io.BufferedOutputStream.write(BufferedOutputStream.java:122)
at java.io.BufferedOutputStream.write(BufferedOutputStream.java:122)
at org.codehaus.groovy.runtime.ProcessGroovyMethods$3.run(ProcessGroovyMethods.java:399)
... 1 more

Process finished with exit code 0
线程“thread-1”groovy.lang.GroovyRuntimeException中的异常:读取进程流时发生异常 awk:源代码第1行出现语法错误 位于org.codehaus.groovy.runtime.ProcessGroovyMethods$3.run(ProcessGroovyMethods.java:402) 上下文是 运行(Thread.java:745)
>>>“在linux/bsd/
pgrep
将使查找正在运行的进程变得更加容易。e、 g

def b = new StringBuffer()
def p = 'pgrep zsh'.execute() // does a zsh run?
p.waitForProcessOutput(b,b)
assert b // any output?  there is a zsh running
assert b.split().first().toInteger() > 0 // split, take first and cast to integer for the first pid returned

b = new StringBuffer()
p = 'pgrep nuffin'.execute() // use `-f` to use the "whole" command line
p.waitForProcessOutput(b,b)
assert !b // empty string?  process not running
另一种选择(因为
ps
的输出不应阻塞任何缓冲区)


'awk{print\$1}.execute()
有效吗?我只是使用findAll和split,而不是三个进程之间的管道。或者
['awk',{print$1}].execute()
?在这个链接中有一些很好的解决方案,其中一些与平台无关--@Rao在那篇文章中,所有的答案都是关于获取JVM pid等的。,但我需要的是一个方法,它可以通过为进程获取字符串来检查任何进程的pidname@tim_yates那恐怕不行-同样的错误。这工作很有魅力-谢谢!!你正式列入我的英雄名单^_^
Integer getPid(processName) {
    'ps -A'.execute()
           .text
           .split('\n')
           .find { it.contains processName }?.split()?.first() as Integer
}

println getPid('groovyconsole')