How do I retrieve the username of the currently logged in user? I
basically to check if the user is logged in as root and if not, exit
the program.
I though about using the LOGNAME environment variable, but if a regular
user used su root, the environment variable still has the user's login
name.
18  5213  dj*********@sno wboard.com wrote: How do I retrieve the username of the currently logged in user? I
basically to check if the user is logged in as root and if not, exit
the program.
I though about using the LOGNAME environment variable, but if a regular
user used su root, the environment variable still has the user's login
name.
This is not a C question, try comp.unix.progr ammer.
Robert Gamble
Sorry, I thought there might be an easy C function that accomplishes
this, but I haven't been able to find one yet.
dj*********@sno wboard.com wrote: How do I retrieve the username of the currently logged in user? I
basically to check if the user is logged in as root and if not, exit
the program.
I though about using the LOGNAME environment variable, but if a regular
user used su root, the environment variable still has the user's login
name.
There is no standard way in C. Your best bet is to ask in
a newsgroup(s) associated with your platform(s) of choice,
such as comp.unix.progr ammer.
<OT> If you can assume POSIX, look at whether
getpwuid and getuid do what you want. But
discussion on them should be in
comp.unix.progr ammer </OT>
-David
<dj*********@sn owboard.com> wrote: Sorry, I thought there might be an easy C function that accomplishes
this, but I haven't been able to find one yet.
There isn't. dj*********@sno wboard.com wrote: How do I retrieve the username of the currently logged in user? I
basically to check if the user is logged in as root and if not, exit
the program.
You call GetUserName, which is declared in <winbase.h>.. .
I though about using the LOGNAME environment variable, but if a regular
user used su root,
....oops.
Richard
On Fri, 19 Aug 2005 06:33:21 GMT, rl*@hoekstra-uitgeverij.nl (Richard
Bos) wrote: dj*********@sn owboard.com wrote:
How do I retrieve the username of the currently logged in user? I
basically to check if the user is logged in as root and if not, exit
the program.
You call GetUserName, which is declared in <winbase.h>.. .
Odd - I can't seem to find either the function or the include file
mentioned in the C standard, or even the POSIX standard. Are you sure
you're in the right newsgroup? I though about using the LOGNAME environment variable, but if a regular
user used su root,
...oops.
Richard
--
Al Balmer
Balmer Consulting re************* ***********@att .net
"Alan Balmer" <al******@att.n et> wrote in message
news:d5******** *************** *********@4ax.c om... On Fri, 19 Aug 2005 06:33:21 GMT, rl*@hoekstra-uitgeverij.nl (Richard
Bos) wrote:
dj*********@s nowboard.com wrote:
How do I retrieve the username of the currently logged in user? I
basically to check if the user is logged in as root and if not, exit
the program.
You call GetUserName, which is declared in <winbase.h>.. .
Odd - I can't seem to find either the function or the include file
mentioned in the C standard, or even the POSIX standard.
Why are you mentioning the POSIX standard? This is comp.lang.c
where we deal strictly with the ISO/IEC international standard.
Are you sure you're in the right newsgroup?
Exactly, that was his point... couldn't you tell by the 'oops' :-) I though about using the LOGNAME environment variable, but if a regular
user used su root,
...oops.
Richard
--
Al Balmer
Balmer Consulting
re************* ***********@att .net
Eric wrote:
<dj*********@sn owboard.com> wrote:
Sorry, I thought there might be an easy C function that accomplishes
this, but I haven't been able to find one yet.
There isn't.
However, if his O/S has the concept of "user name", then there is probably
an O/S call which returns it, and it is probably callable from C by means
of a platform-specific library call. If he were to ask a platform-specific
newsgroup, he should be able to get an answer there. Since he never said
what O/S he was on, he'll have to figure that part out himself. (Though,
given some of his terminology, my guess is comp.unix.progr ammer may be the
place for him.)
--
+-------------------------+--------------------+-----------------------------+
| Kenneth J. Brody | www.hvcomputer.com | |
| kenbrody/at\spamcop.net | www.fptech.com | #include <std_disclaimer .h> |
+-------------------------+--------------------+-----------------------------+
Don't e-mail me at: <mailto:Th***** ********@gmail. com>
Richard Bos wrote:
dj*********@sno wboard.com wrote:
How do I retrieve the username of the currently logged in user? I
basically to check if the user is logged in as root and if not, exit
the program.
You call GetUserName, which is declared in <winbase.h>.. .
# gcc foo.c
foo.c:1: winbase.h: No such file or directory
#
[...remove unknown "winbase.h" include...]
# gcc foo.c
foo.o: In function `main':
foo.o(.text+0x7 ): undefined reference to `GetUserName'
collect2: ld returned 1 exit status
# I though about using the LOGNAME environment variable, but if a regular
user used su root,
...oops.
Which is why platform-specific answers don't work here. :-)
--
+-------------------------+--------------------+-----------------------------+
| Kenneth J. Brody | www.hvcomputer.com | |
| kenbrody/at\spamcop.net | www.fptech.com | #include <std_disclaimer .h> |
+-------------------------+--------------------+-----------------------------+
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