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763a09e172
Logfiles are important to see what happend, in particular if something unexpected happened; so we want to make sure that the logfile is flushed to disk. Before this change, the logfile was typically written at the end in a large chunk as the default (large) buffering applied. Now, characters are written out ASAP, so it is possible to get a live-view with a tail -f <logfile>
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
/*
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* tio - a simple TTY terminal I/O application
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*
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* Copyright (c) 2014-2017 Martin Lund
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include "tio/options.h"
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#include "tio/print.h"
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#include "tio/error.h"
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static FILE *fp;
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static bool log_error = false;
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void log_open(const char *filename)
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{
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fp = fopen(filename, "w+");
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if (fp == NULL)
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{
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log_error = true;
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exit(EXIT_FAILURE);
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}
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setvbuf(fp, NULL, _IONBF, 0);
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}
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void log_write(char c)
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{
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if (fp != NULL)
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fputc(c, fp);
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}
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void log_close(void)
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{
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if (fp != NULL)
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fclose(fp);
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}
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void log_exit(void)
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{
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if (option.log)
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log_close();
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if (log_error)
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error_printf("Could not open log file %s (%s)", option.log_filename, strerror(errno));
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}
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