1 files changed, 86 insertions, 0 deletions
diff --git a/gnu/usr.sbin/sendmail/libsm/snprintf.c b/gnu/usr.sbin/sendmail/libsm/snprintf.c
new file mode 100644
index 00000000000..9994140fff6
--- /dev/null
+++ b/gnu/usr.sbin/sendmail/libsm/snprintf.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
+ *      All rights reserved.
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Chris Torek.
+ *
+ * By using this file, you agree to the terms and conditions set
+ * forth in the LICENSE file which can be found at the top level of
+ * the sendmail distribution.
+ */
+
+#include <sm/gen.h>
+SM_RCSID("@(#)$Sendmail: snprintf.c,v 1.21 2001/03/02 23:53:41 ca Exp $")
+#include <limits.h>
+#include <sm/varargs.h>
+#include <sm/io.h>
+#include "local.h"
+
+/*
+**  SM_SNPRINTF -- format a string to a memory location of restricted size
+**
+**	Parameters:
+**		str -- memory location to place formatted string
+**		n -- size of buffer pointed to by str, capped to
+**			a maximum of INT_MAX
+**		fmt -- the formatting directives
+**		... -- the data to satisfy the formatting
+**
+**	Returns:
+**		Failure: -1
+**		Success: number of bytes that would have been written
+**			to str, not including the trailing '\0',
+**			up to a maximum of INT_MAX, as if there was
+**			no buffer size limitation.  If the result >= n
+**			then the output was truncated.
+**
+**	Side Effects:
+**		If n > 0, then between 0 and n-1 bytes of formatted output
+**		are written into 'str', followed by a '\0'.
+*/
+
+int
+#if SM_VA_STD
+sm_snprintf(char *str, size_t n, char const *fmt, ...)
+#else /* SM_VA_STD */
+sm_snprintf(str, n, fmt, va_alist)
+	char *str;
+	size_t n;
+	char *fmt;
+	va_dcl
+#endif /* SM_VA_STD */
+{
+	int ret;
+	SM_VA_LOCAL_DECL
+	SM_FILE_T fake;
+
+	/* While snprintf(3) specifies size_t stdio uses an int internally */
+	if (n > INT_MAX)
+		n = INT_MAX;
+	SM_VA_START(ap, fmt);
+
+	/* XXX put this into a static? */
+	fake.sm_magic = SmFileMagic;
+	fake.f_file = -1;
+	fake.f_flags = SMWR | SMSTR;
+	fake.f_cookie = &fake;
+	fake.f_bf.smb_base = fake.f_p = (unsigned char *)str;
+	fake.f_bf.smb_size = fake.f_w = n ? n - 1 : 0;
+	fake.f_timeout = SM_TIME_FOREVER;
+	fake.f_timeoutstate = SM_TIME_BLOCK;
+	fake.f_close = NULL;
+	fake.f_open = NULL;
+	fake.f_read = NULL;
+	fake.f_write = NULL;
+	fake.f_seek = NULL;
+	fake.f_setinfo = fake.f_getinfo = NULL;
+	fake.f_type = "sm_snprintf:fake";
+	ret = sm_io_vfprintf(&fake, SM_TIME_FOREVER, fmt, ap);
+	if (n > 0)
+		*fake.f_p = '\0';
+	SM_VA_END(ap);
+	return ret;
+}