How to run a bash script from C program

Question

Bash scripts are very useful and can save a lot of programming time  So how do you start a bash script in a C   program  Also if you know how to make user become the super-user that would be nice also  Thanks

User · Answer

StackOverflow  How to execute a command and get output of command within C     StackOverflow   Using fork pipe select      nobody does things the hard way any more             Also if you know how to make user become the super-user that would be nice also  Thanks       sudo   su   chmod 04500    setuid    amp  seteuid    but they require you to already be root   E  g  chmod ed 04       Take care   These can open  interesting  security holes     Depending on what you are doing  you may not need root    For instance  I ll often chmod chown  dev devices  serial ports  etc   under sudo root  so I can use them from my software without being root   On the other hand  that doesn t work so well when loading unloading kernel modules

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The only standard mandated implementation dependent way is to use the system   function from stdlib h       Also if you know how to make user become the super-user that would be nice also    Do you want the script to run as super-user or do you want to elevate the privileges of the C executable  The former can be done with sudo but there are a few things you need to know before you can go off using sudo

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Since this is a pretty old question  and this method hasn t been added  aside from the system   call function  I guess it would be useful to include creating the shell script with the C binary itself  The shell code will be housed inside the file c source file  Here is an example of code    include  lt stdio h gt   include  lt stdlib h gt    define SHELLSCRIPT      bin bash  n  echo -e       n  echo -e   This is a test shell script inside C code      n  read -p   press  lt enter gt  to continue    n  clear     int main      system SHELLSCRIPT   return 0      Basically  in a nutshell  pun intended   we are defining the script name  fleshing out the script  enclosing them in double quotes  while inserting proper escapes to ignore double quotes in the shell code   and then calling that script s name  which in this example is SHELLSCRIPT using the system   function in main

User · Answer

Use the system function   system  myfile sh       myfile sh should be chmod  x

User · Answer

include  lt stdio h gt   include  lt stdlib h gt             system  my bash script sh

[c++] How to run a bash script from C++ program

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