从linux中的c ++调用时，系统返回错误127 [英] system is returning error 127 when called from c++ in linux

问题描述

命令" am start -n packagename/.activityname "必须在adb shell中运行，并包含在C ++程序中

The command "am start -n packagename/.activityname" has to be run in adb shell and is to be included in C++ program

我在C ++程序中添加了行 system("am start -n packagename/.activityname")，并且该程序在adb shell中运行时， 系统命令返回错误代码127，而shell命令未运行

I added the line system("am start -n packagename/.activityname") in my C++ program and when the program is run in adb shell, the system command is returning error code 127 and the shell command is not running

使用的编译器: arm-linux-none-gnueabi-g ++

在我使用g ++编译器时可以正常工作

Its working when i used the g++ compiler

编译器或路径有问题吗?

Is the problem with the compiler or with the path?

推荐答案

system()无法在具有/bin/sh是bash版本2，因为bash 2在启动linux.die.net/man/3/system上放弃了特权

system() will not, in fact, work properly from programs with set-user-ID or set-group-ID privileges on systems on which /bin/sh is bash version 2, since bash 2 drops privileges on startup linux.die.net/man/3/system

我使用的不是 execl("/system/bin/sh"，"sh"，"test.sh")

其中test.sh具有 am start -n packagename/.activityname ，并且可以正常工作

where test.sh has am start -n packagename/.activityname and it works

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