diff options
| -rw-r--r-- | pc-bios/s390-ccw/sclp.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/pc-bios/s390-ccw/sclp.c b/pc-bios/s390-ccw/sclp.c index b1fc8ff44b..90d1bc3147 100644 --- a/pc-bios/s390-ccw/sclp.c +++ b/pc-bios/s390-ccw/sclp.c @@ -76,17 +76,35 @@ static int _strlen(const char *str) long write(int fd, const void *str, size_t len) { WriteEventData *sccb = (void *)_sccb; + const char *p = str; + size_t data_len = 0; + size_t i; if (fd != 1 && fd != 2) { return -EIO; } - sccb->h.length = sizeof(WriteEventData) + len; + for (i = 0; i < len; i++) { + if ((data_len + 1) >= SCCB_DATA_LEN) { + /* We would overflow the sccb buffer, abort early */ + len = i; + break; + } + + if (*p == '\n') { + /* Terminal emulators might need \r\n, so generate it */ + sccb->data[data_len++] = '\r'; + } + + sccb->data[data_len++] = *p; + p++; + } + + sccb->h.length = sizeof(WriteEventData) + data_len; sccb->h.function_code = SCLP_FC_NORMAL_WRITE; - sccb->ebh.length = sizeof(EventBufferHeader) + len; + sccb->ebh.length = sizeof(EventBufferHeader) + data_len; sccb->ebh.type = SCLP_EVENT_ASCII_CONSOLE_DATA; sccb->ebh.flags = 0; - memcpy(sccb->data, str, len); sclp_service_call(SCLP_CMD_WRITE_EVENT_DATA, sccb); |