[PATCH] opensm - address windows env issues

[Stan C. Smith]

Add a Windows version of truncate_log_file().
Use the Windows flavor of vsprintf().

Would you prefer items of this nature as two separate patches?

thanks,

stan.

Signed-off-by: stan smith <stan.sm...@intel.com>

--- a/opensm/osm_log.c  2010-05-22 05:49:24.000000000 -0700
+++ b/opensm/osm_log.c  2010-05-24 11:40:07.823895800 -0700
@@ -96,8 +96,14 @@
 
 static void truncate_log_file(osm_log_t * p_log)
 {
-       fprintf(stderr,
-               "truncate_log_file: cannot truncate on windows system (yet)\n");
+       int fd = _fileno(p_log->out_port);
+       HANDLE hFile = (HANDLE) _get_osfhandle(fd);
+
+       if (_lseek(fd, 0, SEEK_SET) < 0)
+               fprintf(stderr, "truncate_log_file: cannot rewind: %s\n",
+                       strerror(errno));
+       SetEndOfFile(hFile);
+       p_log->count = 0;
 }
 #endif                         /* ndef __WIN__ */
 
@@ -123,12 +129,21 @@
                return;
 
        va_start(args, p_str);
+#ifndef __WIN__
        if (p_log->log_prefix == NULL)
                vsprintf(buffer, p_str, args);
        else {
                int n = snprintf(buffer, sizeof(buffer), "%s: ", 
p_log->log_prefix);
                vsprintf(buffer + n, p_str, args);
        }
+#else
+       if (p_log->log_prefix == NULL)
+               _vsnprintf(buffer, 1024, (LPSTR)p_str, args);
+       else {
+               int n = snprintf(buffer, sizeof(buffer), "%s: ", 
p_log->log_prefix);
+               _vsnprintf(buffer + n, (1024 - n), (LPSTR)p_str, args);
+       }
+#endif
        va_end(args);
 
        /* this is a call to the syslog */

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