From b55d5f89d1e5e1e0eabf62be388e717591b0ef23 Mon Sep 17 00:00:00 2001
From: Elliot Lee <sopwith@src.gnome.org>
Date: Wed, 11 Mar 1998 19:34:39 +0000
Subject: [PATCH] Remove vsnprintf implementation - bad license, and did not
 check to see if libc has it already. It should work fine on most systems,
 now, but if your libc does not define vsnprintf, please send in a patch for
 an LGPLd implementation :)

svn path=/trunk/; revision=131
---
 support/vsnprintf.c | 151 ++--------------------------------------------------
 1 file changed, 3 insertions(+), 148 deletions(-)

diff --git a/support/vsnprintf.c b/support/vsnprintf.c
index efc6d64..e7d5729 100644
--- a/support/vsnprintf.c
+++ b/support/vsnprintf.c
@@ -1,150 +1,5 @@
-/*
- * Revision 12: http://theos.com/~deraadt/snprintf.c
- *
- * Copyright (c) 1997 Theo de Raadt
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
+#include <config.h>
 
-#include <sys/param.h>
-#include <sys/types.h>
-#include <sys/mman.h>
-#include <signal.h>
-#include <stdio.h>
-#if __STDC__
-#include <stdarg.h>
-#include <stdlib.h>
-#else
-#include <varargs.h>
+#ifndef HAVE_VSNPRINTF
+#error "You need an operating system that has vsnprintf()"
 #endif
-#include <setjmp.h>
-
-#ifndef roundup
-#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
-#endif
-
-static int pgsize;
-static char *curobj;
-static int caught;
-static sigjmp_buf bail;
-
-#define EXTRABYTES	2	/* XXX: why 2? you don't want to know */
-
-static char *
-msetup(str, n)
-	char *str;
-	size_t n;
-{
-	char *e;
-
-	if (n == 0)
-		return NULL;
-	if (pgsize == 0)
-		pgsize = getpagesize();
-	curobj = (char *)malloc(n + EXTRABYTES + pgsize * 2);
-	if (curobj == NULL)
-		return NULL;
-	e = curobj + n + EXTRABYTES;
-	e = (char *)roundup((unsigned long)e, pgsize);
-	if (mprotect(e, pgsize, PROT_NONE) == -1) {
-		free(curobj);
-		curobj = NULL;
-		return NULL;
-	}
-	e = e - n - EXTRABYTES;
-	*e = '\0';
-	return (e);
-}
-
-static void
-mcatch()
-{
-	siglongjmp(bail, 1);
-}
-
-static void
-mcleanup(str, n, p)
-	char *str;
-	size_t n;
-	char *p;
-{
-	strncpy(str, p, n-1);
-	str[n-1] = '\0';
-	if (mprotect((caddr_t)(p + n + EXTRABYTES), pgsize,
-	    PROT_READ|PROT_WRITE|PROT_EXEC) == -1)
-		mprotect((caddr_t)(p + n + EXTRABYTES), pgsize,
-		    PROT_READ|PROT_WRITE);
-	free(curobj);
-}
-
-int
-#if __STDC__
-snprintf(char *str, size_t n, char const *fmt, ...)
-#else
-snprintf(str, n, fmt, va_alist)
-	char *str;
-	size_t n;
-	char *fmt;
-	va_dcl
-#endif
-{
-	va_list ap;
-#if __STDC__
-	va_start(ap, fmt);
-#else
-	va_start(ap);
-#endif
-
-	return (vsnprintf(str, n, fmt, ap));
-	va_end(ap);
-}
-
-int
-vsnprintf(str, n, fmt, ap)
-	char *str;
-	size_t n;
-	char *fmt;
-	char *ap;
-{
-	struct sigaction osa, nsa;
-	char *p;
-	int ret = n + 1;	/* if we bail, indicated we overflowed */
-
-	memset(&nsa, 0, sizeof nsa);
-	nsa.sa_handler = mcatch;
-	sigemptyset(&nsa.sa_mask);
-
-	p = msetup(str, n);
-	if (p == NULL) {
-		*str = '\0';
-		return 0;
-	}
-	if (sigsetjmp(bail, 1) == 0) {
-		if (sigaction(SIGSEGV, &nsa, &osa) == -1) {
-			mcleanup(str, n, p);
-			return (0);
-		}
-		ret = vsprintf(p, fmt, ap);
-	}
-	mcleanup(str, n, p);
-	(void) sigaction(SIGSEGV, &osa, NULL);
-	return (ret);
-}
-- 
2.7.4