From baac461b332816271200146a62b97274dd6744e1 Mon Sep 17 00:00:00 2001
From: Arun Prakash Jana <engineerarun@gmail.com>
Date: Sat, 5 Oct 2019 07:17:01 +0530
Subject: [PATCH] Limit imput length at readline prompt
---
src/nnn.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/src/nnn.c b/src/nnn.c
index bcb500f3..35a2a072 100644
--- a/src/nnn.c
+++ b/src/nnn.c
@@ -117,6 +117,7 @@
#define TOUPPER(ch) \
(((ch) >= 'a' && (ch) <= 'z') ? ((ch) - 'a' + 'A') : (ch))
#define CMD_LEN_MAX (PATH_MAX + ((NAME_MAX + 1) << 1))
+#define READLINE_MAX 128
#define FILTER '/'
#define MSGWAIT '$'
#define REGEX_MAX 48
@@ -1818,7 +1819,7 @@ static char *xreadline(char *prefill, char *prompt)
int x, r;
const int WCHAR_T_WIDTH = sizeof(wchar_t);
wint_t ch[2] = {0};
- wchar_t * const buf = malloc(sizeof(wchar_t) * CMD_LEN_MAX);
+ wchar_t * const buf = malloc(sizeof(wchar_t) * READLINE_MAX);
if (!buf)
errexit();
@@ -1828,7 +1829,7 @@ static char *xreadline(char *prefill, char *prompt)
if (prefill) {
DPRINTF_S(prefill);
- len = pos = mbstowcs(buf, prefill, CMD_LEN_MAX);
+ len = pos = mbstowcs(buf, prefill, READLINE_MAX);
} else
len = (size_t)-1;
@@ -1887,7 +1888,7 @@ static char *xreadline(char *prefill, char *prompt)
if (*ch < ASCII_MAX && keyname(*ch)[0] == '^')
continue;
- if (pos < CMD_LEN_MAX - 1) {
+ if (pos < READLINE_MAX - 1) {
memmove(buf + pos + 1, buf + pos,
(len - pos) * WCHAR_T_WIDTH);
buf[pos] = *ch;
@@ -1945,9 +1946,9 @@ END:
buf[len] = '\0';
- pos = wcstombs(g_buf, buf, CMD_LEN_MAX - 1);
- if (pos >= CMD_LEN_MAX - 1)
- g_buf[CMD_LEN_MAX - 1] = '\0';
+ pos = wcstombs(g_buf, buf, READLINE_MAX - 1);
+ if (pos >= READLINE_MAX - 1)
+ g_buf[READLINE_MAX - 1] = '\0';
free(buf);
return g_buf;
--
2.51.0