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[PATCH] mingw: avoid using strbuf in syslog

From
Erik Faye-Lund <kusmabite@gmail.com>
Date
Oct 6, 2011, 16:57 UTC
Message-ID
<1317920244-6320-1-git-send-email-kusmabite@gmail.com>
strbuf can call die, which again can call syslog from git-daemon.
Endless recursion is no fun; fix it by hand-rolling the logic.
Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
---
Fixes the problem Brandon pointed out...
 compat/win32/syslog.c |   26 ++++++++++++++------------
 1 files changed, 14 insertions(+), 12 deletions(-)
diff --git a/compat/win32/syslog.c b/compat/win32/syslog.c
index 42b95a9..3b8e2b7 100644
--- a/compat/win32/syslog.c
+++ b/compat/win32/syslog.c
@@ -1,5 +1,4 @@
 #include "../../git-compat-util.h"
-#include "../../strbuf.h"
 
 static HANDLE ms_eventlog;
 
@@ -16,13 +15,8 @@ void openlog(const char *ident, int logopt, int facility)
 
 void syslog(int priority, const char *fmt, ...)
 {
-	struct strbuf sb = STRBUF_INIT;
-	struct strbuf_expand_dict_entry dict[] = {
-		{"1", "% 1"},
-		{NULL, NULL}
-	};
 	WORD logtype;
-	char *str;
+	char *str, *pos;
 	int str_len;
 	va_list ap;
 
@@ -39,11 +33,20 @@ void syslog(int priority, const char *fmt, ...)
 	}
 
 	str = malloc(str_len + 1);
+	if (!str)
+		return; /* no chance to report error */
+
 	va_start(ap, fmt);
 	vsnprintf(str, str_len + 1, fmt, ap);
 	va_end(ap);
-	strbuf_expand(&sb, str, strbuf_expand_dict_cb, &dict);
-	free(str);
+
+	while ((pos = strstr(str, "%1")) != NULL) {
+		str = realloc(str, ++str_len + 1);
+		if (!str)
+			return;
+		memmove(pos + 2, pos + 1, strlen(pos));
+		pos[1] = ' ';
+	}
 
 	switch (priority) {
 	case LOG_EMERG:
@@ -66,7 +69,6 @@ void syslog(int priority, const char *fmt, ...)
 	}
 
 	ReportEventA(ms_eventlog, logtype, 0, 0, NULL, 1, 0,
-	    (const char **)&sb.buf, NULL);
-
-	strbuf_release(&sb);
+	    (const char **)&str, NULL);
+	free(str);
 }
-- 
1.7.6.msysgit.0.579.ga3d6f
Next: Brandon Casey
Message 1 of 3 in “mingw: avoid using strbuf in syslog”
  1. mingw: avoid using strbuf in syslogErik Faye-Lund, Oct 6, 2011
  2. Brandon CaseyOct 6, 2011
  3. Erik Faye-LundOct 6, 2011

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