| 1 | /* |
| 2 | * Print to stream or current monitor |
| 3 | * |
| 4 | * Copyright (C) 2019 Red Hat Inc. |
| 5 | * |
| 6 | * Authors: |
| 7 | * Markus Armbruster <armbru@redhat.com>, |
| 8 | * |
| 9 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| 10 | * See the COPYING file in the top-level directory. |
| 11 | */ |
| 12 | |
| 13 | #include "qemu/osdep.h" |
| 14 | #include "monitor/monitor.h" |
| 15 | #include "monitor/hmp.h" |
| 16 | #include "qom/object.h" |
| 17 | #include "qemu/qemu-print.h" |
| 18 | |
| 19 | /* |
| 20 | * Print like vprintf(). |
| 21 | * Print to current monitor if we have one, else to stdout. |
| 22 | * (if the monitor is QMP, fail without printing anything) |
| 23 | */ |
| 24 | int qemu_vprintf(const char *fmt, va_list ap) |
| 25 | { |
| 26 | Monitor *cur_mon = monitor_cur(); |
| 27 | |
| 28 | /* for all monitors: QMP & HMP */ |
| 29 | if (cur_mon) { |
| 30 | #ifdef CONFIG_HMP |
| 31 | /* don't use monitor_cur_hmp(), to avoid a second lookup */ |
| 32 | MonitorHMP *hmp = (MonitorHMP *) |
| 33 | object_dynamic_cast(OBJECT(cur_mon), TYPE_MONITOR_HMP); |
| 34 | if (!hmp) { |
| 35 | return -1; |
| 36 | } |
| 37 | return monitor_hmp_vprintf(hmp, fmt, ap); |
| 38 | #else |
| 39 | return -1; |
| 40 | #endif |
| 41 | } |
| 42 | return vprintf(fmt, ap); |
| 43 | } |
| 44 | |
| 45 | /* |
| 46 | * Print like printf(). |
| 47 | * Print to current monitor if we have one, else to stdout. |
| 48 | * (if the monitor is QMP, fail without printing anything) |
| 49 | */ |
| 50 | int qemu_printf(const char *fmt, ...) |
| 51 | { |
| 52 | va_list ap; |
| 53 | int ret; |
| 54 | |
| 55 | va_start(ap, fmt); |
| 56 | ret = qemu_vprintf(fmt, ap); |
| 57 | va_end(ap); |
| 58 | return ret; |
| 59 | } |
| 60 | |
| 61 | /* |
| 62 | * Print like vfprintf() |
| 63 | * Print to @stream if non-null, else to current HMP monitor if we |
| 64 | * have one, else fail without printing anything. |
| 65 | * Return number of characters printed on success, negative value on |
| 66 | * error. |
| 67 | */ |
| 68 | int qemu_vfprintf(FILE *stream, const char *fmt, va_list ap) |
| 69 | { |
| 70 | #ifdef CONFIG_HMP |
| 71 | if (!stream) { |
| 72 | MonitorHMP *hmp = monitor_cur_hmp(); |
| 73 | if (!hmp) { |
| 74 | return -1; |
| 75 | } |
| 76 | return monitor_hmp_vprintf(hmp, fmt, ap); |
| 77 | } |
| 78 | #endif |
| 79 | return vfprintf(stream, fmt, ap); |
| 80 | } |
| 81 | |
| 82 | /* |
| 83 | * Print like fprintf(). |
| 84 | * Print to @stream if non-null, else to current HMP monitor if we |
| 85 | * have one, else fail without printing anything. |
| 86 | * Return number of characters printed on success, negative value on |
| 87 | * error. |
| 88 | */ |
| 89 | int qemu_fprintf(FILE *stream, const char *fmt, ...) |
| 90 | { |
| 91 | va_list ap; |
| 92 | int ret; |
| 93 | |
| 94 | va_start(ap, fmt); |
| 95 | ret = qemu_vfprintf(stream, fmt, ap); |
| 96 | va_end(ap); |
| 97 | return ret; |
| 98 | } |