src/system/libroot/posix/unistd/getlogin.c

   1 /*
   2  * Copyright 2002-2006, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6
   7 #include <syscalls.h>
   8
   9 #include <errno.h>
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include <unistd.h>
  13 #include <pwd.h>
  14
  15 #include <errno_private.h>
  16
  17
  18 char *getlogin()
  19 {
  20         struct passwd *pw;
  21         pw = getpwuid(getuid());
  22         if (pw)
  23                 return pw->pw_name;
  24         __set_errno(ENOMEM);
  25         return NULL;
  26 }
  27
  28
  29 int getlogin_r(char *name, size_t nameSize)
  30 {
  31         struct passwd *pw;
  32         pw = getpwuid(getuid());
  33         if (pw && (nameSize >= LOGIN_NAME_MAX)) {
  34                 memset(name, 0, nameSize);
  35                 strlcpy(name, pw->pw_name, LOGIN_NAME_MAX);
  36                 return B_OK;
  37         }
  38         return ENOMEM;
  39 }
  40
  41
  42 char *
  43 cuserid(char *s)
  44 {
  45         if (s != NULL && getlogin_r(s, L_cuserid))
  46                 return s;
  47
  48         return getlogin();
  49 }
  50