ipsvd patch

I sudjest a replacemat of uidgid.c
I'll spport numeric UID/GID
expample:
  -u 123:456

It can be also dangerous.  Let for example /etc/passwd has line:
123:x:1000:1000:Bad user:/home/Bad_user:/bin/bash

If one use option -u 123
the program will have UID=123 instad of 1000.
In this case use -u 1000 instead of -u 123.

Have anybody seen such /etc/passwd?

Nikola

----------------------- uidgid.c --------------------------
#include <sys/types.h>
#include <pwd.h>
#include <grp.h>
#include "uidgid.h"
#include "str.h"
#include "error.h"
#include "scan.h"

unsigned int uidgid_get(struct uidgid *u, char *ug, unsigned int dogrp) {
  char *g =0;
  struct passwd *pwd =0;
  struct group *gr =0;
  int d =0;
  unsigned long ul;
  uid_t uid;
  gid_t gid;

  if (dogrp)
    if (ug[(d =str_chr(ug, ':'))] == ':') {
      ug[d] =0;
      g =ug +d +1;
    }
  errno =0;
  if (scan_ulong(ug, &ul)) {
    uid =ul;
    gid =ul;
  } else {
    pwd =getpwnam(ug);
    if (! pwd) {
      if (g) ug[d] =':';
      return(0);
    }
    uid =pw->pw_uid;
    gid =pw->pw_gid;
  }
  if (g) {
    ug[d] =':';
    errno =0;
    if (scan_ulong(g, &ul)) {
      gid =ul;
    } else {
      gr =getgrnam(g);
      if (! gr) return(0);
      gid =gr->gr_gid;
    }
  }
  u->gid =gid;
  u->uid =uid;
  return(1);
}