Re: how to spawn a process under different user
Gabriel Genellina gagsl-...@yahoo.com.ar wrote: En Thu, 02 Jul 2009 19:27:05 -0300, Tim Harig user...@ilthio.net escribió: On 2009-07-02, sanket sanket.s.pa...@gmail.com wrote: sanket wrote: I am trying to use python's subprocess module to launch a process. but in order to do that I have to change the user. I am using python 2.4 on centos. I have never done this in python; but, using the normal system calls in C the process is basically: 1. fork() a new process 2. the child process changes its user id with setreuid() and possibly its group id with setregid() 3. then the child exec()s new process which replaces itself All of the necessary functions should be under the os module on POSIX operating systems. How to do that using the subprocess module: write a function for item (2) above and pass it as the preexec_fn argument to Popen. preexec_fn is executed after fork() and before exec() If you are forking 100s of processes a second you want to use the method above, however I think it is easier to use su (assuming you start off as root), so instead of passing ['mycommand', 'my_arg1', 'my_arg2'] to Popen, pass ['su', '-', 'username', '-c', 'mycommand my_arg1 my_arg2'] There is some opportunity for quoting problems there, but it is easy! -- Nick Craig-Wood n...@craig-wood.com -- http://www.craig-wood.com/nick -- http://mail.python.org/mailman/listinfo/python-list
how to spawn a process under different user
Hello All, I am trying to use python's subprocess module to launch a process. but in order to do that I have to change the user. I am not getting any clue how to do that? so can anyone please tell me How can I spawn a process under different user than currently I am logging in as. Thank you, sanket -- http://mail.python.org/mailman/listinfo/python-list
Re: how to spawn a process under different user
On Jul 2, 1:58 pm, Tim Golden m...@timgolden.me.uk wrote: sanket wrote: Hello All, I am trying to use python's subprocess module to launch a process. but in order to do that I have to change the user. I am not getting any clue how to do that? so can anyone please tell me How can I spawn a process under different user than currently I am logging in as. What platform are you on? If you are on Windows, there was a thread on this subject some time in the last month. (Short answer: switching user before launching subprocess won't work; switching within the subprocess will...) TJG Hi TJG, Thanks for the reply. I am using python 2.4 on centos. Thanks, sanket -- http://mail.python.org/mailman/listinfo/python-list
Re: how to spawn a process under different user
On 2009-07-02, sanket sanket.s.pa...@gmail.com wrote: sanket wrote: I am trying to use python's subprocess module to launch a process. but in order to do that I have to change the user. I am using python 2.4 on centos. I have never done this in python; but, using the normal system calls in C the process is basically: 1. fork() a new process 2. the child process changes its user id with setreuid() and possibly its group id with setregid() 3. then the child exec()s new process which replaces itself All of the necessary functions should be under the os module on POSIX operating systems. -- http://mail.python.org/mailman/listinfo/python-list
Re: how to spawn a process under different user
En Thu, 02 Jul 2009 19:27:05 -0300, Tim Harig user...@ilthio.net escribió: On 2009-07-02, sanket sanket.s.pa...@gmail.com wrote: sanket wrote: I am trying to use python's subprocess module to launch a process. but in order to do that I have to change the user. I am using python 2.4 on centos. I have never done this in python; but, using the normal system calls in C the process is basically: 1. fork() a new process 2. the child process changes its user id with setreuid() and possibly its group id with setregid() 3. then the child exec()s new process which replaces itself All of the necessary functions should be under the os module on POSIX operating systems. How to do that using the subprocess module: write a function for item (2) above and pass it as the preexec_fn argument to Popen. preexec_fn is executed after fork() and before exec() -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
