From af6d5f438bf18c92730a8ae273efa54cd11f2906 Mon Sep 17 00:00:00 2001
From: Bjørn Mork <bjorn@mork.no>
Date: Sun, 5 Nov 2017 15:42:31 +0100
Subject: ripe-atlas-fw: imported version 4780
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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Signed-off-by: Bjørn Mork <bjorn@mork.no>
---
 libbb/atlas_name_macro.c | 87 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 libbb/atlas_name_macro.c

(limited to 'libbb/atlas_name_macro.c')

diff --git a/libbb/atlas_name_macro.c b/libbb/atlas_name_macro.c
new file mode 100644
index 0000000..0674fd0
--- /dev/null
+++ b/libbb/atlas_name_macro.c
@@ -0,0 +1,87 @@
+#include "libbb.h"
+
+#define URANDOM_DEV "/dev/urandom"
+
+static char hex_chars[]= "0123456789abcdef";
+
+char *atlas_name_macro(char *str)
+{
+	unsigned char c;
+	int i, fd;
+	size_t len;
+	char *p, *in, *out;
+	char buf[256];
+	unsigned char random_buf[8];
+
+	p= strchr(str, '$');
+	if (p == NULL)
+		return strdup(str);
+
+	in= str;
+	out= buf;
+
+	while (*in)
+	{
+		p= strchr(in, '$');
+		if (p == NULL)
+		{
+			strlcpy(out, in, buf+sizeof(buf)-out);
+			break;
+		}
+		if (p != in)
+		{
+			len= p-in;
+
+			if (len+1 > buf+sizeof(buf)-out)
+				return NULL;
+			memcpy(out, in, len);
+			out[len]= '\0';
+			
+			out += len;
+		}
+
+		switch(p[1])
+		{
+		case 'p':
+			snprintf(out, buf+sizeof(buf)-out, "%d",
+				get_probe_id());
+			break;
+		case 't':
+			snprintf(out, buf+sizeof(buf)-out, "%ld",
+				(long)time(NULL));
+			break;
+		case 'r':
+			/* We need to hex digits per byte in random_buf */
+			if (sizeof(random_buf)*2+1 > buf+sizeof(buf)-out)
+				return NULL;
+
+			fd= open(URANDOM_DEV, O_RDONLY);
+
+			/* Best effort, just ignore errors */
+			if (fd != -1)
+			{
+				read(fd, random_buf, sizeof(random_buf));
+				close(fd);
+			}
+
+			for (i= 0; i<sizeof(random_buf); i++)
+			{
+				c= random_buf[i];
+
+				out[0]= hex_chars[(c >> 4) & 0xf];
+				out[1]= hex_chars[c & 0xf];
+				out += 2;
+			}
+			
+			out[0]= '\0';
+			break;		
+
+		default:
+			return NULL;
+		}
+		in= p+2;
+		out += strlen(out);
+	}
+
+	return strdup(buf);
+}
-- 
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