static void setuidgid(const char *userarg,
const char *grouparg)
{
if (grouparg)
{
gid_t gid = 0;
struct group *gr;
if (isid(grouparg))
gid=atoi(grouparg);
else if ((gr=getgrnam(grouparg)) == 0)
{
fprintf(stderr, "Group not found: %s\n", grouparg);
exit(1);
}
else gid=gr->gr_gid;
libmail_changegroup(gid);
}
if (userarg)
{
uid_t uid;
if (isid(userarg))
{
uid=atoi(userarg);
libmail_changeuidgid(uid, getgid());
}
else
{
gid_t g=getgid(), *gp=0;
if (grouparg) gp= &g;
libmail_changeusername(userarg, gp);
}
}
}
int auth_callback_default(struct authinfo *ainfo)
{
if (ainfo->address == NULL)
{
fprintf(stderr, "WARN: No address!!\n");
return (-1);
}
if (ainfo->sysusername)
libmail_changeusername(ainfo->sysusername,
&ainfo->sysgroupid);
else if (ainfo->sysuserid)
libmail_changeuidgid(*ainfo->sysuserid,
ainfo->sysgroupid);
else
{
fprintf(stderr, "WARN: %s: No UID/GID!!\n", ainfo->address);
return (-1);
}
if (!ainfo->homedir)
{
errno=EINVAL;
fprintf(stderr, "WARN: %s: No homedir!!\n", ainfo->address);
return (1);
}
if (chdir(ainfo->homedir))
{
fprintf(stderr, "WARN: %s: chdir(%s) failed!!\n",
ainfo->address, ainfo->homedir);
perror("WARN: error");
return (1);
}
return 0;
}