DOS logger now redirects stdout/stderr instead of providing a new

[dosdemo] / src / dos / logger.c

diff --git a/src/dos/logger.c b/src/dos/logger.c
index 73860e3..f7e9256 100644 (file)
--- a/src/dos/logger.c
+++ b/src/dos/logger.c
@@ -1,46 +1,21 @@
-/*
-colcycle - color cycling image viewer
-Copyright (C) 2016  John Tsiombikas <nuclear@member.fsf.org>
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
 #include <stdio.h>
-#include <stdarg.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
 #include "logger.h"
 
-#define LOGFNAME       "demo.log"
-
-static FILE *logfile;
-
-void logger_output(FILE *fp)
+int init_logger(const char *fname)
 {
-       if(logfile) fclose(logfile);
-       logfile = fp;
-}
-
-void printlog(const char *fmt, ...)
-{
-       va_list ap;
-
-       if(!logfile) {
-               if(!(logfile = fopen(LOGFNAME, "w"))) {
-                       return;
-               }
-               setvbuf(logfile, 0, _IOLBF, 0);
+       int fd;
+       if((fd = open(fname, O_WRONLY)) == -1) {
+               fprintf(stderr, "init_logger: failed to open %s: %s\n", fname, strerror(errno));
+               return -1;
        }
 
-       va_start(ap, fmt);
-       vfprintf(logfile, fmt, ap);
-       va_end(ap);
+       close(1);
+       close(2);
+       dup(fd);
+       dup(fd);
+       return 0;
 }