IABSD.fr/xenocara/app/xdm/error.c

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• Author : matthieu
  Date : 2010-03-28 09:33:02
  Hash : 21c33a1b
  Message : Update to xdm 1.1.9

• app/xdm/error.c

• /*
  
  Copyright 1988, 1998  The Open Group
  
  Permission to use, copy, modify, distribute, and sell this software and its
  documentation for any purpose is hereby granted without fee, provided that
  the above copyright notice appear in all copies and that both that
  copyright notice and this permission notice appear in supporting
  documentation.
  
  The above copyright notice and this permission notice shall be included
  in all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
  OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  OTHER DEALINGS IN THE SOFTWARE.
  
  Except as contained in this notice, the name of The Open Group shall
  not be used in advertising or otherwise to promote the sale, use or
  other dealings in this Software without prior written authorization
  from The Open Group.
  
  */
  
  /*
   * xdm - display manager daemon
   * Author:  Keith Packard, MIT X Consortium
   *
   * error.c
   *
   * Log display manager errors to a file as
   * we generally do not have a terminal to talk to
   */
  
  #include <stdio.h>
  #include <stdarg.h>
  
  #include "dm.h"
  #include "dm_error.h"
  
  /* This function does the actual log message writes. */
  static inline void
  LogVWrite(const char *fmt, va_list args)
  {
      char buf[1024];
      int len;
  
      len = vsnprintf (buf, sizeof(buf), fmt, args);
      if (len >= sizeof(buf)) {
  	len = sizeof(buf) - 1;
      }
      write(STDERR_FILENO, buf, len);
  }
  
  #define LogVarArgsWrite(fmt)	\
      do {			\
  	va_list args;		\
  	va_start(args, fmt);	\
  	LogVWrite(fmt, args);	\
  	va_end(args);		\
      } while(0)
  
  #define LogHeader(type)		\
      LogAppend("xdm %s (pid %ld): ", type, (long)getpid())
  
  /* Append more text to the log without a new header, right after
     having called LogInfo or LogError */
  void
  LogAppend(const char * fmt, ...)
  {
      LogVarArgsWrite(fmt);
  }
  
  void
  LogInfo(const char * fmt, ...)
  {
      LogHeader("info");
      LogVarArgsWrite(fmt);
  }
  
  void
  LogError (const char * fmt, ...)
  {
      LogHeader("error");
      LogVarArgsWrite(fmt);
  }
  
  void
  LogPanic (const char * fmt, ...)
  {
      LogHeader("panic");
      LogVarArgsWrite(fmt);
      _exit (1);
  }
  
  void
  LogOutOfMem (const char * fmt, ...)
  {
      fprintf (stderr, "xdm: out of memory in routine ");
      {
  	va_list args;
  	va_start(args, fmt);
  	vfprintf (stderr, fmt, args);
  	va_end(args);
      }
      fflush (stderr);
  }
  
  void
  Debug (const char * fmt, ...)
  {
      char buf[1024];
  
      if (debugLevel > 0)
      {
  	LogVarArgsWrite(fmt);
      }
  }
  
  void
  InitErrorLog (void)
  {
      int	i;
      if (errorLogFile[0]) {
  	i = creat (errorLogFile, 0666);
  	if (i != -1) {
  	    if (i != STDERR_FILENO) {
  		dup2 (i, STDERR_FILENO);
  		close (i);
  	    }
  	} else
  	    LogError ("Cannot open errorLogFile %s\n", errorLogFile);
      }
  }