Keep it as simple as possible for now: just escape anything that is not
isprint-able, is among the "escape" parameter or '\' as an octal escape
sequence. This should be pretty easy to extend if any other user needs
something more complex in the future.
Signed-off-by: Ivan Delalande <col...@arista.com>
---
include/utils.h | 2 ++
lib/utils.c | 15 +++++++++++++++
2 files changed, 17 insertions(+)
diff --git a/include/utils.h b/include/utils.h
index 76addb32..3d91c50d 100644
--- a/include/utils.h
+++ b/include/utils.h
@@ -195,6 +195,8 @@ static inline void __jiffies_to_tv(struct timeval *tv,
unsigned long jiffies)
tv->tv_usec = tvusec - 1000000 * tv->tv_sec;
}
+void print_escape_buf(const __u8 *buf, size_t len, const char *escape);
+
int print_timestamp(FILE *fp);
void print_nlmsg_timestamp(FILE *fp, const struct nlmsghdr *n);
diff --git a/lib/utils.c b/lib/utils.c
index 0cf99619..a494190e 100644
--- a/lib/utils.c
+++ b/lib/utils.c
@@ -31,6 +31,7 @@
#include <time.h>
#include <sys/time.h>
#include <errno.h>
+#include <ctype.h>
#include "rt_names.h"
#include "utils.h"
@@ -1047,6 +1048,20 @@ int addr64_n2a(__u64 addr, char *buff, size_t len)
return written;
}
+/* Print buffer and escape bytes that are !isprint or among 'escape' */
+void print_escape_buf(const __u8 *buf, size_t len, const char *escape)
+{
+ size_t i;
+
+ for (i = 0; i < len; ++i) {
+ if (isprint(buf[i]) && buf[i] != '\\' &&
+ !strchr(escape, buf[i]))
+ printf("%c", buf[i]);
+ else
+ printf("\\%03o", buf[i]);
+ }
+}
+
int print_timestamp(FILE *fp)
{
struct timeval tv;
--
2.14.2
