text: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
  /* This Source Code Form is subject to the terms of the Mozilla Public
   * License, v. 2.0. If a copy of the MPL was not distributed with this
   * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  
  #include "nsUserInfo.h"
  #include "nsCRT.h"
  
  #include <pwd.h>
  #include <sys/types.h>
  #include <unistd.h>
  #include <sys/utsname.h>
  
  #include "nsString.h"
  #include "nsXPIDLString.h"
  #include "nsReadableUtils.h"
  #include "nsNativeCharsetUtils.h"
  
  /* Some UNIXy platforms don't have pw_gecos. In this case we use pw_name */
  #if defined(NO_PW_GECOS)
  #define PW_GECOS pw_name
  #else
  #define PW_GECOS pw_gecos
  #endif
  
  nsUserInfo::nsUserInfo()
  {
  }
  
  nsUserInfo::~nsUserInfo()
  {
  }
  
  NS_IMPL_ISUPPORTS(nsUserInfo,nsIUserInfo)
  
  NS_IMETHODIMP
  nsUserInfo::GetFullname(char16_t **aFullname)
  {
      struct passwd *pw = nullptr;
  
      pw = getpwuid (geteuid());
  
      if (!pw || !pw->PW_GECOS) return NS_ERROR_FAILURE;
  
  #ifdef DEBUG_sspitzer
      printf("fullname = %s\n", pw->PW_GECOS);
  #endif
  
      nsAutoCString fullname(pw->PW_GECOS);
  
      // now try to parse the GECOS information, which will be in the form
      // Full Name, <other stuff> - eliminate the ", <other stuff>
      // also, sometimes GECOS uses "&" to mean "the user name" so do
      // the appropriate substitution
      
      // truncate at first comma (field delimiter)
      int32_t index;
      if ((index = fullname.Find(",")) != kNotFound)
          fullname.Truncate(index);
  
      // replace ampersand with username
      if (pw->pw_name) {
          nsAutoCString username(pw->pw_name);
          if (!username.IsEmpty() && nsCRT::IsLower(username.CharAt(0)))
              username.SetCharAt(nsCRT::ToUpper(username.CharAt(0)), 0);
              
          fullname.ReplaceSubstring("&", username.get());
      }
  
      nsAutoString unicodeFullname;
      NS_CopyNativeToUnicode(fullname, unicodeFullname);
  
      *aFullname = ToNewUnicode(unicodeFullname);
  
      if (*aFullname)
          return NS_OK;
  
      return NS_ERROR_FAILURE;
  }
  
  NS_IMETHODIMP 
  nsUserInfo::GetUsername(char * *aUsername)
  {
      struct passwd *pw = nullptr;
  
      // is this portable?  those are POSIX compliant calls, but I need to check
      pw = getpwuid(geteuid());
  
      if (!pw || !pw->pw_name) return NS_ERROR_FAILURE;
  
  #ifdef DEBUG_sspitzer
      printf("username = %s\n", pw->pw_name);
  #endif
  
      *aUsername = strdup(pw->pw_name);
  
      return NS_OK;
  }
  
  NS_IMETHODIMP 
  nsUserInfo::GetDomain(char * *aDomain)
  {
      nsresult rv = NS_ERROR_FAILURE;
  
      struct utsname buf;
      char *domainname = nullptr;
  
      if (uname(&buf) < 0) { 
          return rv;
      }
  
  #if defined(__linux__)
      domainname = buf.domainname;
  #endif
  
      if (domainname && domainname[0]) {   
          *aDomain = strdup(domainname);
          rv = NS_OK;
      }
      else {
          // try to get the hostname from the nodename
          // on machines that use DHCP, domainname may not be set
          // but the nodename might.
          if (buf.nodename[0]) {
              // if the nodename is foo.bar.org, use bar.org as the domain
              char *pos = strchr(buf.nodename,'.');
              if (pos) {
                  *aDomain = strdup(pos+1);
                  rv = NS_OK;
              }
          }
      }
      
      return rv;
  }
  
  NS_IMETHODIMP 
  nsUserInfo::GetEmailAddress(char * *aEmailAddress)
  {
      // use username + "@" + domain for the email address
  
      nsresult rv;
  
      nsAutoCString emailAddress;
      nsXPIDLCString username;
      nsXPIDLCString domain;
  
      rv = GetUsername(getter_Copies(username));
      if (NS_FAILED(rv)) return rv;
  
      rv = GetDomain(getter_Copies(domain));
      if (NS_FAILED(rv)) return rv;
  
      if (!username.IsEmpty() && !domain.IsEmpty()) {
          emailAddress = (const char *)username;
          emailAddress += "@";
          emailAddress += (const char *)domain;
      }
      else {
          return NS_ERROR_FAILURE;
      }
  
      *aEmailAddress = ToNewCString(emailAddress);
      
      return NS_OK;
  }
  
  