list management

Kirk Bailey idiot1 at
Wed Dec 11 23:44:56 EST 2002

I just went in on ssh, and tried issuing the newaliases command- regfused by 
the server. As su, it works fine. Hate to be the bearer of sad news, but in 
FreeBSD you cannot do this.

I wonder why...

Emil Isberg wrote:
> On Wed, 11 Dec 2002, Kirk Bailey wrote:
>>I want to be able to add and delete email lsits to my email system. This
>>means adding and deleting alias definitions to the aliases file in
>>/etc/mail, and then running the newaliases command. To do this, the web
>>server must run a program, a script. This is exeuted in my freebsd server
>>as nobody. How may I accomplish this task?
> I don't think sudo is what you are looking for...
> I would set it up as several alias-files from the MTAs point of view and
> then make sure that the right one is writeable by nobody (or a specific
> user for the web-mail-handler-stuff).
> Sendmails newaliases is runable by any user (including nobody) so you
> should be able to run it from whatever script there is...
> Else you might want to create a setuid application that only does an
> append on a certain file and then calls newaliases.
> How about the following? (Some checks on alias and stuff needs to be
> added... Either here or before this program is called.)
> #define MAX_LEN 1024
> int main(int argc, char *argv[])
> {
>   FILE *fp=NULL;
>   int len=0;
>   char buf[MAX_LEN+1]="";
>   if (argc!=3 || !argv[2] || !argv[3])
>   {
>       printf("Usage: <addalias> <alias> <target>\r\n");
>       exit(EXIT_SUCCESS);
>   }
>   len=strlen(argv[1])+strlen(argv[2])+10;
>   if (len > MAX_LEN)
>     exit(EXIT_FAILURE);
>   strcpy(buf, argv[1]);
>   strcat(buf, ":\t");
>   strcat(buf, argv[2]);
>   strcat(buf, "\r\n");
>   if (!(fp=fopen("/etc/mail/mywebaliases", "wt+"))
>     exit(EXIT_FAILURE);
>   fputs(buf, fp);
>   fclose(fp);
>   /* Make sure that newaliases is in the path. */
>   execlp("newaliases", "newaliases", NULL);
>   /* If we get here then I failed to find newaliases. */
>   puts("Couldn't find and execute newaliases.");
>   return 0;
> }



              Kirk D Bailey

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