Initial import of the CDE 2.1.30 sources from the Open Group.
This commit is contained in:
Peter Howkins
423
cde/programs/dtlogin/error.c
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423
cde/programs/dtlogin/error.c
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/* *
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* (c) Copyright 1993, 1994 Hewlett-Packard Company *
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* (c) Copyright 1993, 1994 International Business Machines Corp. *
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* (c) Copyright 1993, 1994 Sun Microsystems, Inc. *
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* (c) Copyright 1993, 1994 Novell, Inc. *
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*/
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/*
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* xdm - display manager daemon
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*
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* $XConsortium: error.c /main/6 1996/10/21 12:50:31 mgreess $
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*
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* Copyright 1988 Massachusetts Institute of Technology
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*
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* Permission to use, copy, modify, and distribute this software and its
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* documentation for any purpose and without fee is hereby granted, provided
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* that the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of M.I.T. not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. M.I.T. makes no representations about the
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* suitability of this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*
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* Author: Keith Packard, MIT X Consortium
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*/
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/*
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* error.c
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*
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* Log display manager errors to a file as
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* we generally do not have a terminal to talk to
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*/
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# include <sys/stat.h>
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# include <time.h>
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# include "dm.h"
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# include "vgmsg.h"
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# include <stdarg.h>
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# define Va_start(a,b) va_start(a,b)
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extern char DisplayName[];
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void
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InitErrorLog( void )
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{
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int i;
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static char tz[32];
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/*
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* add TimeZone to our environment so error message time stamps
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* have the correct value...
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*/
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if (timeZone != NULL && strlen(timeZone) < 29) {
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strcpy(tz,"TZ=");
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strcat(tz,timeZone);
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putenv(tz);
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}
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if (errorLogFile && errorLogFile[0]) {
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i = creat (errorLogFile, 0666);
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if (i != -1) {
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if (i != 2) {
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dup2 (i, 2);
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close (i);
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}
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} else
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LogError(ReadCatalog(
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MC_LOG_SET,MC_LOG_NO_ERRLOG,MC_DEF_LOG_NO_ERRLOG),
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errorLogFile);
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}
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}
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/****************************************************************************
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*
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* CheckErrorFile
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*
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* Just a quick check to verify that we can open an error log.
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* Do this before we do BecomeDeamon.
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*
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****************************************************************************/
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void
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CheckErrorFile( void )
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{
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int i;
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if (errorLogFile && errorLogFile[0]) {
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i = creat (errorLogFile, 0666);
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if (i != -1) {
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close (i);
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} else {
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fprintf(stderr, (char *)ReadCatalog(
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MC_LOG_SET,MC_LOG_NO_ERRLOG,MC_DEF_LOG_NO_ERRLOG),
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errorLogFile);
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}
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} else {
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fprintf(stderr, (char *)ReadCatalog(
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MC_LOG_SET,MC_LOG_NO_ERRLOG,MC_DEF_LOG_NO_ERRLOG),
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"\"\"");
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}
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}
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/****************************************************************************
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*
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* SyncErrorFile
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*
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* point the stderr stream to the most current Error Log File. This allows
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* the user to muck with the file while XDM is running and have everything
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* sync up later.
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*
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* optionally, write a time stamp to the file
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****************************************************************************/
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int
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SyncErrorFile( int stamp )
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{
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time_t timer;
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TrimErrorFile();
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if (errorLogFile && errorLogFile[0] &&
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(freopen(errorLogFile, "a", stderr) != NULL)) {
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if (stamp) {
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timer = time(NULL);
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fprintf(stderr, "\n%s", ctime(&timer));
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}
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return(1);
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}
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else
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return(0);
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}
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/****************************************************************************
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*
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* TrimErrorFile
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*
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* Trim the length of the error log file until it is 75% of the maximum
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* specified by the resource "errorLogSize".
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*
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****************************************************************************/
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void
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TrimErrorFile( void )
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{
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int f1, f2;
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int deleteBytes;
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char buf[BUFSIZ];
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char *p;
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int n;
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off_t status;
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struct stat statb;
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/*
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* convert user-specified units of 1Kb to bytes...
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* put an upper cap of 200Kb on the file...
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*/
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if (errorLogSize < 1024) errorLogSize *= 1024;
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if (errorLogSize > (200*1024) ) {
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errorLogSize = 200*1024;
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LogError(ReadCatalog(
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MC_LOG_SET,MC_LOG_MAX_LOGFILE,MC_DEF_LOG_MAX_LOGFILE));
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}
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if ( errorLogFile && errorLogFile[0] &&
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(stat(errorLogFile, &statb) == 0) &&
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(statb.st_size > errorLogSize) ) {
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deleteBytes = (statb.st_size - errorLogSize) + (errorLogSize / 4);
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Debug("TrimErrorLog(): discarding oldest %d bytes from logfile %s\n",
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deleteBytes, errorLogFile);
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/*
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* get two pointers to the file...
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*/
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if ( (f1 = open(errorLogFile, O_RDWR)) < 0 ||
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(f2 = open(errorLogFile, O_RDWR)) < 0 ) {
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Debug("TrimErrorLog(): Cannot open file %s, error number = %d\n",
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errorLogFile, errno);
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return;
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}
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/*
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* position read pointer to the first full line after the trim
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* point...
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*/
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if ( (status = lseek(f2, deleteBytes, SEEK_SET)) < 0 ) {
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Debug("TrimErrorLog(): Cannot lseek() in file %s, error number = %d\n",
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errorLogFile, errno);
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return;
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}
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n = read(f2, buf, BUFSIZ);
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if ( (p = strchr(buf,'\n')) != NULL ) {
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p++;
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n -= p - buf;
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deleteBytes += p - buf;
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}
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else {
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p = buf;
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}
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/*
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* shift bytes to be saved to the beginning of the file...
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*/
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write (f1, p, n);
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while ( (n = read(f2, buf, BUFSIZ)) > 0 )
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write(f1, buf, n);
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/*
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* truncate file to new length and close file pointers...
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*/
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truncate(errorLogFile, statb.st_size - deleteBytes);
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close(f1);
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close(f2);
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}
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}
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/****************************************************************************
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*
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* LogInfo
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*
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* Write an information message to the log file
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*
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****************************************************************************/
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void
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LogInfo( unsigned char *fmt, ...)
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{
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va_list args;
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Va_start(args,fmt);
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if ( SyncErrorFile(1) ) {
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fprintf (stderr, "info (pid %ld): ", (long)getpid());
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vfprintf (stderr, (char *)fmt, args);
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fflush (stderr);
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}
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va_end(args);
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}
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/****************************************************************************
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*
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* LogError
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*
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* Write an error message to the log file.
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*
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****************************************************************************/
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void
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LogError( unsigned char *fmt, ...)
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{
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va_list args;
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Va_start(args,fmt);
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if ( SyncErrorFile(1) ) {
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fprintf (stderr, "error (pid %ld): ", (long)getpid());
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vfprintf (stderr, (char *)fmt, args);
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fflush (stderr);
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}
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va_end(args);
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}
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/****************************************************************************
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*
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* LogOutOfMem
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*
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* Write an "out of memory" message to the log file.
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*
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****************************************************************************/
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void
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LogOutOfMem( unsigned char *fmt, ...)
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{
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va_list args;
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Va_start(args,fmt);
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if ( SyncErrorFile(1) ) {
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fprintf(stderr,(char *)ReadCatalog(MC_ERROR_SET,MC_NO_MEMORY,MC_DEF_NO_MEMORY));
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vfprintf (stderr, (char *)fmt, args);
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fflush (stderr);
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}
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va_end(args);
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}
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/***************************************************************************
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*
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* CODE DISABLED!!! The following routines...
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*
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* getLocalAddress()
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* scanHostList()
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* indirectAlias()
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* ForEachMatchingIndirectHost()
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* UseChooser()
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* ForEachChooserHost()
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*
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* are disabled until indirect queries are supported...
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*
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***************************************************************************/
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#if 0
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/****************************************************************************
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*
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* LogPanic
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*
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* Write a panic message to the log file.
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*
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****************************************************************************/
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void
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LogPanic( char *fmt, ...)
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{
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va_list args;
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Va_start(args,fmt);
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if ( SyncErrorFile(1) ) {
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fprintf (stderr, "panic (pid %ld): ", (long)getpid());
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vfprintf (stderr, fmt, args);
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fflush (stderr);
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}
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va_end(args);
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}
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/****************************************************************************
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*
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* Panic
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*
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* Write a panic message to the console
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*
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****************************************************************************/
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int
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Panic( char *mesg )
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{
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int i;
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i = creat ("/dev/console", 0666);
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write (i, "panic: ", 7);
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write (i, mesg, strlen (mesg));
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exit (1);
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}
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#endif /* DISABLED CODE */
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/****************************************************************************
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*
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* Debug
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*
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* Write a debug message to stdout
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*
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****************************************************************************/
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static int DoName=True;
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void
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Debug( char *fmt, ...)
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{
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va_list args;
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Va_start(args,fmt);
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if (debugLevel > 0)
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{
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if ( strlen(DisplayName) > 0 && DoName)
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fprintf(stdout, "(%s) ", DisplayName);
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vprintf (fmt, args);
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fflush (stdout);
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/*
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* don't prepend the display name next time if this debug message
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* does not contain a "new line" character...
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*/
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if ( strchr(fmt,'\n') == NULL )
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DoName=False;
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else
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DoName=True;
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}
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va_end(args);
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}
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