how is atoi() done in the kernel?

[douglaskbell]

So, atoi is not in the kernel.

Is there a workaround?

[meton_magis]

not in the kernel?

are you trying to use this in a C program? If you are, the kernel is not responsible for supplying libraries for non kernel apps. you need to inclue the cstdlib.h header file.

cstdlib (stdlib.h) - C++ Reference

it is a C++ site, but it includes the legacy library references. you need to include the cstdlin.h header into your source file, and then you can use atoi() in your program.

[coopstah13]

i'm guessing the OP is trying to write a kernel code, and needs the functionality of atoi. Probably you can't include stdlib.h in a kernel module, thus the problem.

[Rubberman]

There is a function simple_strtol() defined in kernel.h which you can use in place of atoi().

[bloggins666]

To those new people trying to find their way through the Kernel API....

If you have a look at the README file in the top directory of the Linux kernel source, you will find a reference to "DOCUMENTATION". It refers you to the directory under that current directory of "Documentation/DocBook". In that directory are instructions of how to generate the html or PDF files that describe the Kernel API which also lists the "simple_strtoll()" function along with many other useful functions. If you are writing a kernel module, you should really become acquainted with the kernel API. I derive a lot of amusement reviewing someones code after they have written a bunch of linked list functions AGAIN!!

Cheers!!