From d8d8b008629ffd69f1e204010cb3299bb633877e Mon Sep 17 00:00:00 2001
From: Manu Bretelle <chantr4@gmail.com>
Date: Wed, 29 Mar 2023 00:30:02 -0700
Subject: [PATCH] tools: bpftool: json: Fix backslash escape typo in jsonw_puts
This is essentially a backport of iproute2's
commit ed54f76484b5 ("json: fix backslash escape typo in jsonw_puts")
Also added the stdio.h include in json_writer.h to be able to compile
and run the json_writer test as used below).
Before this fix:
$ gcc -D notused -D TEST -I../../include -o json_writer json_writer.c
json_writer.h
$ ./json_writer
{
"Vyatta": {
"url": "http://vyatta.com",
"downloads": 2000000,
"stock": 8.16,
"ARGV": [],
"empty": [],
"NIL": {},
"my_null": null,
"special chars": [
"slash": "/",
"newline": "\n",
"tab": "\t",
"ff": "\f",
"quote": "\"",
"tick": "'",
"backslash": "\n"
]
}
}
After:
$ gcc -D notused -D TEST -I../../include -o json_writer json_writer.c
json_writer.h
$ ./json_writer
{
"Vyatta": {
"url": "http://vyatta.com",
"downloads": 2000000,
"stock": 8.16,
"ARGV": [],
"empty": [],
"NIL": {},
"my_null": null,
"special chars": [
"slash": "/",
"newline": "\n",
"tab": "\t",
"ff": "\f",
"quote": "\"",
"tick": "'",
"backslash": "\\"
]
}
}
Signed-off-by: Manu Bretelle <chantr4@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/bpf/20230329073002.2026563-1-chantr4@gmail.com
---
tools/bpf/bpftool/json_writer.c | 2 +-
tools/bpf/bpftool/json_writer.h | 1 +
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/bpf/bpftool/json_writer.c b/tools/bpf/bpftool/json_writer.c
index bca5dd0a59e34..be379613d1188 100644
--- a/tools/bpf/bpftool/json_writer.c
+++ b/tools/bpf/bpftool/json_writer.c
@@ -75,7 +75,7 @@ static void jsonw_puts(json_writer_t *self, const char *str)
fputs("\\b", self->out);
break;
case '\\':
- fputs("\\n", self->out);
+ fputs("\\\\", self->out);
break;
case '"':
fputs("\\\"", self->out);
diff --git a/tools/bpf/bpftool/json_writer.h b/tools/bpf/bpftool/json_writer.h
index 8ace65cdb92f2..5aaffd3b837b1 100644
--- a/tools/bpf/bpftool/json_writer.h
+++ b/tools/bpf/bpftool/json_writer.h
@@ -14,6 +14,7 @@
#include <stdbool.h>
#include <stdint.h>
#include <stdarg.h>
+#include <stdio.h>
#include <linux/compiler.h>
/* Opaque class structure */