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Merge pull request #319 from bloqaudio/pr/cmd-editor-overflow

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cmd_editor: fix cmd_buffer overflow and CLI hang on long input
This commit is contained in:
René van Dorst
2026-08-12 09:26:17 +02:00
committed by GitHub
parent 5e30f8e6c0 0ed45e0710
commit 75151e0b00
1 changed files with 18 additions and 15 deletions
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cmd_editor.c
+5 -2
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@@ -40,8 +40,10 @@ void cmd_edit(void) __banked
{ {
while (l != sbuf_ptr) { while (l != sbuf_ptr) {
if (sbuf[l] >= ' ' && sbuf[l] < 127) { // A printable character, copy to command line if (sbuf[l] >= ' ' && sbuf[l] < 127) { // A printable character, copy to command line
if (cmd_line_len >= CMD_BUF_SIZE) // Reserve one byte for the terminating NUL written on Enter. When the
continue; // line is full, drop the character but still fall through to advance the
// serial-ring read pointer below; a 'continue' here would spin forever.
if (cmd_line_len < CMD_BUF_SIZE - 1) {
write_char(sbuf[l]); write_char(sbuf[l]);
// Shift buffer to right // Shift buffer to right
for (uint8_t i = cmd_line_len; i > cursor; i--) for (uint8_t i = cmd_line_len; i > cursor; i--)
@@ -55,6 +57,7 @@ void cmd_edit(void) __banked
// Move backwards // Move backwards
for (uint8_t i = cursor; i < cmd_line_len; i++) for (uint8_t i = cursor; i < cmd_line_len; i++)
write_char('\010'); // BS works like cursor-left write_char('\010'); // BS works like cursor-left
}
} else if (sbuf[l] == '\033') { // ESC-Sequence } else if (sbuf[l] == '\033') { // ESC-Sequence
// Wait until we have at least 3 characters including the ESC character in the serial buffer // Wait until we have at least 3 characters including the ESC character in the serial buffer
if (((sbuf_ptr + SBUF_SIZE - l) & SBUF_MASK) < 3) if (((sbuf_ptr + SBUF_SIZE - l) & SBUF_MASK) < 3)