diff options
| -rw-r--r-- | hmp-commands.hx | 2 | ||||
| -rw-r--r-- | hmp.c | 15 |
2 files changed, 16 insertions, 1 deletions
diff --git a/hmp-commands.hx b/hmp-commands.hx index 66ec716e03..4c100d7369 100644 --- a/hmp-commands.hx +++ b/hmp-commands.hx @@ -869,6 +869,8 @@ STEXI @findex ringbuf_read Read and print up to @var{size} bytes from ring buffer character device @var{device}. +Certain non-printable characters are printed \uXXXX, where XXXX is the +character code in hexadecimal. Character \ is printed \\. Bug: can screw up when the buffer contains invalid UTF-8 sequences, NUL characters, after the ring buffer lost data, and when reading stops because the size limit is reached. @@ -679,6 +679,7 @@ void hmp_ringbuf_read(Monitor *mon, const QDict *qdict) const char *chardev = qdict_get_str(qdict, "device"); char *data; Error *errp = NULL; + int i; data = qmp_ringbuf_read(chardev, size, false, 0, &errp); if (errp) { @@ -687,7 +688,19 @@ void hmp_ringbuf_read(Monitor *mon, const QDict *qdict) return; } - monitor_printf(mon, "%s\n", data); + for (i = 0; data[i]; i++) { + unsigned char ch = data[i]; + + if (ch == '\\') { + monitor_printf(mon, "\\\\"); + } else if ((ch < 0x20 && ch != '\n' && ch != '\t') || ch == 0x7F) { + monitor_printf(mon, "\\u%04X", ch); + } else { + monitor_printf(mon, "%c", ch); + } + + } + monitor_printf(mon, "\n"); g_free(data); } |