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Full Discussion: root privileges
Top Forums Programming root privileges Post 89679 by blowtorch on Tuesday 15th of November 2005 01:41:11 AM
Old 11-15-2005
matrixmadhan's solution can be extended to also do what you want to. Check the man pages of getpwnam and related syscalls to see how you can go about this.
 

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UNIMPLEMENTED(2)					     Linux Programmer's Manual						  UNIMPLEMENTED(2)

NAME
afs_syscall, break, ftime, getpmsg, gtty, lock, madvise1, mpx, prof, profil, putpmsg, security, stty, tuxcall, ulimit, vserver - unimple- mented system calls SYNOPSIS
Unimplemented system calls. DESCRIPTION
These system calls are not implemented in the Linux 2.6.22 kernel. RETURN VALUE
These system calls always return -1 and set errno to ENOSYS. NOTES
Note that ftime(3), profil(3) and ulimit(3) are implemented as library functions. Some system calls, like alloc_hugepages(2), free_hugepages(2), ioperm(2), iopl(2), and vm86(2) only exist on certain architectures. Some system calls, like ipc(2), create_module(2), init_module(2), and delete_module(2) only exist when the Linux kernel was built with sup- port for them. SEE ALSO
syscalls(2) COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 2007-07-05 UNIMPLEMENTED(2)
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