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digitalmars.D.learn - Why no setuid in linux.d?

reply 0ffh <frank youknow.what.todo.interNETz> writes:
Hi,

I've written a programme that serves port 80, which usually
requires root access. Therefore, after acquiring the socket
I want to relinquish root by setting the uid to nonzero.
I needed to add "int setuid(uid_t uid);" to linux.d and
recompile Phobos in order to do so.
I there a specific reason that setuid (and the related
commands setgid, getuid, geteuid, getgid and getegid)
is/are missing in the standard version of linux.d?

Regards, Frank
Nov 19 2010
next sibling parent reply "Lars T. Kyllingstad" <public kyllingen.NOSPAMnet> writes:
On Fri, 19 Nov 2010 12:33:02 +0100, 0ffh wrote:


 Hi,
 
 I've written a programme that serves port 80, which usually requires
 root access. Therefore, after acquiring the socket I want to relinquish
 root by setting the uid to nonzero. I needed to add "int setuid(uid_t
 uid);" to linux.d and recompile Phobos in order to do so.
 I there a specific reason that setuid (and the related commands setgid,
 getuid, geteuid, getgid and getegid) is/are missing in the standard
 version of linux.d?


All the POSIX headers are in the core.sys.posix package.  In your case, 
what you need is to import core.sys.posix.unistd.

-Lars
Nov 19 2010
parent reply 0ffh <frank youknow.what.todo.interNETz> writes:
Lars T. Kyllingstad wrote:

 On Fri, 19 Nov 2010 12:33:02 +0100, 0ffh wrote:
 

 Hi,
 [...]
 I there a specific reason that setuid (and the related commands setgid,
 getuid, geteuid, getgid and getegid) is/are missing in the standard
 version of linux.d?


 
 All the POSIX headers are in the core.sys.posix package.  In your case, 
 what you need is to import core.sys.posix.unistd.
 
 -Lars


Thanks Lars, but "import core.sys.posix.unistd;" gives me
"Error: module posix cannot read file 'core/sys/posix.d'".

I'm on D1 btw with no intention at all to switch to D2.

Regards, Frank
Nov 19 2010
parent "Lars T. Kyllingstad" <public kyllingen.NOSPAMnet> writes:
On Fri, 19 Nov 2010 13:02:42 +0100, 0ffh wrote:


 Lars T. Kyllingstad wrote:

 On Fri, 19 Nov 2010 12:33:02 +0100, 0ffh wrote:
 

 Hi,
 [...]
 I there a specific reason that setuid (and the related commands
 setgid, getuid, geteuid, getgid and getegid) is/are missing in the
 standard version of linux.d?


 
 All the POSIX headers are in the core.sys.posix package.  In your case,
 what you need is to import core.sys.posix.unistd.
 
 -Lars


 
 Thanks Lars, but "import core.sys.posix.unistd;" gives me "Error: module
 posix cannot read file 'core/sys/posix.d'".
 
 I'm on D1 btw with no intention at all to switch to D2.


Ah, then you can't use core.*.  Sorry for the confusion.

-Lars
Nov 19 2010
prev sibling parent reply "Steven Schveighoffer" <schveiguy yahoo.com> writes:
On Fri, 19 Nov 2010 06:33:02 -0500, 0ffh  
<frank youknow.what.todo.internetz> wrote:


 Hi,

 I've written a programme that serves port 80, which usually
 requires root access. Therefore, after acquiring the socket
 I want to relinquish root by setting the uid to nonzero.
 I needed to add "int setuid(uid_t uid);" to linux.d and
 recompile Phobos in order to do so.
 I there a specific reason that setuid (and the related
 commands setgid, getuid, geteuid, getgid and getegid)
 is/are missing in the standard version of linux.d?

 Regards, Frank


You are not required to modify phobos to prototype a C function, just do  
this:

extern(C) int setuid(uid_t uid);

to your file that calls the function, and you are good to go.

As to why it was omitted, I'm unsure.

-Steve
Nov 19 2010
parent 0ffh <frank youknow.what.todo.interNETz> writes:
Steven Schveighoffer wrote:

 [...]
 You are not required to modify phobos to prototype a C function, just do 
 this:
 extern(C) int setuid(uid_t uid);
 [...]


Yeah I know, and you're right! It's just I felt that it belonged there...


 As to why it was omitted, I'm unsure.


So am I! =)

-Frank
Nov 19 2010