get user id

[monkeys paw]

What is the function to obtain the user id when
running a C program? Or does it go thru an
environment module?

[Lew Pitcher]

Re: get user id

On October 21, 2008 13:01, in comp.lang.c, monkeys paw (user@example.n et)
wrote:

What is the function to obtain the user id when
running a C program?

It depends on your OS and the add-on libraries available under it. The C
standard does not speak of "user id", let alone define a standard function
to access it.

Or does it go thru an environment module?

Not sure what you are asking here. If, by "environmen t module", you
mean "function defined in an add-on library available under my OS", then
yes, you obtain a user id through an environment module.


--
Lew Pitcher

Master Codewright & JOAT-in-training | Registered Linux User #112576
http://pitcher.digitalfreehold.ca/ | GPG public key available by request
---------- Slackware - Because I know what I'm doing. ------

[Antoninus Twink]

Re: get user id

On 21 Oct 2008 at 17:01, monkeys paw wrote:

What is the function to obtain the user id when running a C program?

getuid(2) to get the real user ID
geteuid(2) to get the effective user ID

[Joachim Schmitz]

Re: get user id

Antoninus Twink wrote:

On 21 Oct 2008 at 17:01, monkeys paw wrote:

>What is the function to obtain the user id when running a C program?

>
getuid(2) to get the real user ID
geteuid(2) to get the effective user ID

which are topical in comp.unix.prgra mmer, not here.

Bye, Jojo

[monkeys paw]

Re: get user id

Thanks, what i was looking for (and found):


main()
{

struct passwd *pwd;

pwd = getpwuid(getuid ());

if ((pwd) && (!strcmp(pwd->pw_name, "pamelah")) )
printf("It's Pam!\n");

}





Lew Pitcher wrote:

On October 21, 2008 13:01, in comp.lang.c, monkeys paw (user@example.n et)
wrote:
>

>What is the function to obtain the user id when
>running a C program?

>
It depends on your OS and the add-on libraries available under it. The C
standard does not speak of "user id", let alone define a standard function
to access it.
>

>Or does it go thru an environment module?

>
Not sure what you are asking here. If, by "environmen t module", you
mean "function defined in an add-on library available under my OS", then
yes, you obtain a user id through an environment module.
>
>