使用NSIS更新％PATH％环境变量
我读到“字符串长于$ {NSIS_MAX_STRLEN} （1024）会被截断/损坏。”
我如何安全更新％PATH％环境变量？
5 个答案:
答案 0 :(得分：6)
您可以使用special builds page中的替代NSIS版本，例如定义NSIS_MAX_STRLEN=8192的{{3}}，并且可以阻止您破坏主机路径。
实际上，在台式机上，1024字节似乎已经足够了，但是在安装了许多工具的开发主机上（比如我的），路径可能在操作后被破坏，而8192字节的字符串构建从未扰乱我的机器。
非常确定，您可以在操作之前添加对路径长度的检查，并在尝试操作路径之前路径将接近NSIS_MAX_STRLEN常量的情况下使用消息中止安装程序。 / p>
答案 1 :(得分：4)
真正的解决方案是编写自定义插件或直接使用系统插件调用Windows API，这样可以避免NSIS缓冲区长度限制：
!include LogicLib.nsh
!include WinCore.nsh
!ifndef NSIS_CHAR_SIZE
!define NSIS_CHAR_SIZE 1
!endif
Function RegAppendString
System::Store S
Pop $R0 ; append
Pop $R1 ; separator
Pop $R2 ; reg value
Pop $R3 ; reg path
Pop $R4 ; reg hkey
System::Call 'ADVAPI32::RegCreateKey(i$R4,tR3,*i.r1)i.r0'
${If} $0 = 0
System::Call 'ADVAPI32::RegQueryValueEx(ir1,tR2,i0,*i.r2,i0,*i0r3)i.r0'
${If} $0 <> 0
StrCpy $2 ${REG_SZ}
StrCpy $3 0
${EndIf}
StrLen $4 $R0
StrLen $5 $R1
IntOp $4 $4 + $5
IntOp $4 $4 + 1 ; For \0
!if ${NSIS_CHAR_SIZE} > 1
IntOp $4 $4 * ${NSIS_CHAR_SIZE}
!endif
IntOp $4 $4 + $3
System::Alloc $4
System::Call 'ADVAPI32::RegQueryValueEx(ir1,tR2,i0,i0,isr9,*ir4r4)i.r0'
${If} $0 = 0
${OrIf} $0 = ${ERROR_FILE_NOT_FOUND}
System::Call 'KERNEL32::lstrlen(t)(ir9)i.r0'
${If} $0 <> 0
System::Call 'KERNEL32::lstrcat(t)(ir9,tR1)'
${EndIf}
System::Call 'KERNEL32::lstrcat(t)(ir9,tR0)'
System::Call 'KERNEL32::lstrlen(t)(ir9)i.r0'
IntOp $0 $0 + 1
!if ${NSIS_CHAR_SIZE} > 1
IntOp $0 $0 * ${NSIS_CHAR_SIZE}
!endif
System::Call 'ADVAPI32::RegSetValueEx(ir1,tR2,i0,ir2,ir9,ir0)i.r0'
${EndIf}
System::Free $9
System::Call 'ADVAPI32::RegCloseKey(ir1)'
${EndIf}
Push $0
System::Store L
FunctionEnd
Section
Push ${HKEY_CURRENT_USER}
Push "Environment"
Push "Path"
Push ";"
Push "c:\whatever"
Call RegAppendString
Pop $0
DetailPrint RegAppendString:Error=$0
SectionEnd
答案 2 :(得分：2)
我更喜欢使用Windows命令处理器（cmd.exe）通过NSIS nsExec::Exec命令，这样您就可以像PATH一样轻松地附加到; Check if the path entry already exists and write result to $0
nsExec::Exec 'echo %PATH% | find "c:\some\new\dir"'
Pop $0 ; gets result code
${If} $0 = 0
nsExec::Exec 'setx PATH=%PATH%;c:\some\new\dir'
${EndIf}
：
CMD.EXE使用此方法， 请注意，在构建新 另请注意，此方法取决于large strings build explained by Seki in his answer。 PATH在内部展开%PATH%变量，不受任何NSIS字符串长度限制的影响。或者，更改 nsExec::Exec 'setx PATH=c:\some\new\dir;%PATH%'
令牌粘贴的顺序，如果您希望首先选择 ，那么可以在系统上以相同的名称安装任何其他内容以及其他所有内容：< / p>
PATH;时包含双引号非常重要 。命令处理器从不期望PATH字符串中有双引号，如果添加任何字符串，它可能会以意想不到的方式运行。它仅以分号（nsExec::Exec）分隔路径。ExecWait与function launchParticlesJS(a,e){var i=document.querySelector("#"+a+" > canvas");pJS={canvas:{el:i,w:i.offsetWidth,h:i.offsetHeight},particles:{color:"#fff",shape:"circle",opacity:1,size:2.5,size_random:true,nb:200,line_linked:{enable_auto:true,distance:100,color:"#fff",opacity:1,width:1,condensed_mode:{enable:true,rotateX:65000,rotateY:65000}},anim:{enable:true,speed:1},array:[]},interactivity:{enable:true,mouse:{distance:100},detect_on:"canvas",mode:"grab",line_linked:{opacity:1},events:{onclick:{enable:true,mode:"push",nb:4}}},retina_detect:false,fn:{vendors:{interactivity:{}}}};if(e){if(e.particles){var b=e.particles;if(b.color){pJS.particles.color=b.color}if(b.shape){pJS.particles.shape=b.shape}if(b.opacity){pJS.particles.opacity=b.opacity}if(b.size){pJS.particles.size=b.size}if(b.size_random==false){pJS.particles.size_random=b.size_random}if(b.nb){pJS.particles.nb=b.nb}if(b.line_linked){var j=b.line_linked;if(j.enable_auto==false){pJS.particles.line_linked.enable_auto=j.enable_auto}if(j.distance){pJS.particles.line_linked.distance=j.distance}if(j.color){pJS.particles.line_linked.color=j.color}if(j.opacity){pJS.particles.line_linked.opacity=j.opacity}if(j.width){pJS.particles.line_linked.width=j.width}if(j.condensed_mode){var g=j.condensed_mode;if(g.enable==false){pJS.particles.line_linked.condensed_mode.enable=g.enable}if(g.rotateX){pJS.particles.line_linked.condensed_mode.rotateX=g.rotateX}if(g.rotateY){pJS.particles.line_linked.condensed_mode.rotateY=g.rotateY}}}if(b.anim){var 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window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||window.oRequestAnimationFrame||window.msRequestAnimationFrame||function(a){window.setTimeout(a,1000/60)}})();window.cancelRequestAnimFrame=(function(){return window.cancelAnimationFrame||window.webkitCancelRequestAnimationFrame||window.mozCancelRequestAnimationFrame||window.oCancelRequestAnimationFrame||window.msCancelRequestAnimationFrame||clearTimeout})();function hexToRgb(c){var b=/^#?([a-f\d])([a-f\d])([a-f\d])$/i;c=c.replace(b,function(e,h,f,d){return h+h+f+f+d+d});var a=/^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(c);return a?{r:parseInt(a[1],16),g:parseInt(a[2],16),b:parseInt(a[3],16)}:null}window.particlesJS=function(d,c){if(typeof(d)!="string"){c=d;d="particles-js"}if(!d){d="particles-js"}var b=document.createElement("canvas");b.style.width="100%";b.style.height="100%";var a=document.getElementById(d).appendChild(b);if(a!=null){launchParticlesJS(d,c)}};
/* particlesJS('dom-id', params);
/* @dom-id : set the html tag id [string, optional, default value : particles-js]
/* @params: set the params [object, optional, default values : check particles.js] */
/* config dom id (optional) + config particles params */
particlesJS('particles-js', {
particles: {
color: '#f00',
shape: 'triangle', // "circle", "edge" or "triangle"
opacity: 1,
size: 4,
size_random: true,
nb: 50,
line_linked: {
enable_auto: true,
distance: 200,
color: '#000',
opacity: 1,
width: 1,
condensed_mode: {
enable: false,
rotateX: 600,
rotateY: 600
}
},
anim: {
enable: true,
speed: 1
}
},
interactivity: {
enable: true,
mouse: {
distance: 100
},
detect_on: 'window', // "canvas" or "window"
mode: 'grab',
line_linked: {
opacity: .5
},
events: {
onclick: {
enable: true,
mode: 'push', // "push" or "remove" (particles)
nb: 4
}
}
},
/* Retina Display Support */
retina_detect: true
});
}
的不同之处在于它在内部运行，而不会弹出其他可见的cmd提示窗口。
答案 3 :(得分：0)
我已经编写了NSIS 3.0示例来处理超过限制的案例，而无需安装任何东西。在这里回答了这个问题：Set environment variables with NSIS in Window 7
答案 4 :(得分：0)
我很沮丧地看到所有复杂的NSIS插件和char限制，所以我写了一个小小的应用程序PathEd来照顾所有人。
它设计为可以在安装程序中进行部署，并且可以从其部署位置进行调用，例如：
PathEd.exe add "C:\Program Files\RepoZ"
要么
PathEd.exe remove "C:\Program Files\RepoZ"
PathEd负责分号处理，避免重复，不区分大小写的检查，用户帐户控制提示，参数引号处理，安全和防御性值删除等。
随时使用。但是，别忘了在GitHub上给它加星号。
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