I find it useful occasionally to play with the guests' notion of time,
for example to see if a program copes sanely with daylight savings
time transitions. The following patches allow this, at least on
FreeBSD, which is the only system I tested them on. Share and enjoy.
John
--- qemu-doc.texi.orig Mon Feb 5 23:01:54 2007
+++ qemu-doc.texi Sat Apr 7 03:44:06 2007
@@ -297,6 +297,14 @@
qemu -soundhw ?
@end example
[EMAIL PROTECTED] -t time
+Set the real time clock to @var{time}.
+
[EMAIL PROTECTED] -tfmt format
+Format for the argument to -t as specified in strptime(3).
+Defaults to "%c", i.e. the output format of date(1) in the
+current locale.
+
@item -localtime
Set the real time clock to local time (the default is to UTC
time). This option is needed to have correct date in MS-DOS or
--- hw/mc146818rtc.c.orig Fri Apr 6 22:31:58 2007
+++ hw/mc146818rtc.c Sat Apr 7 02:57:04 2007
@@ -391,11 +391,14 @@
int val;
/* set the CMOS date */
- time(&ti);
- if (rtc_utc)
- tm = gmtime(&ti);
- else
- tm = localtime(&ti);
+ if (rtc_given) {
+ time(&ti);
+ tm = localtime(&ti);
+ strptime(boot_time, tfmt, tm);
+ } else {
+ time(&ti);
+ tm = ( rtc_utc ? gmtime(&ti) : localtime(&ti) ) ;
+ }
rtc_set_date(s, tm);
val = to_bcd(s, (tm->tm_year / 100) + 19);
--- vl.c.orig Fri Apr 6 22:37:53 2007
+++ vl.c Sat Apr 7 03:35:42 2007
@@ -144,6 +144,9 @@
NICInfo nd_table[MAX_NICS];
QEMUTimer *gui_timer;
int vm_running;
+int rtc_given = 0;
+const char *tfmt = "%c";
+const char *boot_time = NULL;
int rtc_utc = 1;
int cirrus_vga_enabled = 1;
#ifdef TARGET_SPARC
@@ -6190,6 +6193,11 @@
" use -soundhw ? to get the list of supported
cards\n"
" use -soundhw all to enable all of them\n"
#endif
+ "-t time set the CMOS clock to 'time' at boot\n"
+ "-tfmt format format for the argument to -t as specified in
strptime(3)\n"
+ " defaults to \"%%c\", i.e. the output format of
date(1) in the\n"
+ " current locale\n"
+
"-localtime set the real time clock to local time
[default=utc]\n"
"-full-screen start in full screen\n"
#ifdef TARGET_I386
@@ -6331,6 +6339,8 @@
QEMU_OPTION_L,
QEMU_OPTION_no_code_copy,
QEMU_OPTION_k,
+ QEMU_OPTION_t,
+ QEMU_OPTION_tfmt,
QEMU_OPTION_localtime,
QEMU_OPTION_cirrusvga,
QEMU_OPTION_g,
@@ -6414,6 +6424,8 @@
#if defined(TARGET_PPC) || defined(TARGET_SPARC)
{ "g", 1, QEMU_OPTION_g },
#endif
+ { "t", HAS_ARG, QEMU_OPTION_t },
+ { "tfmt", HAS_ARG, QEMU_OPTION_tfmt },
{ "localtime", 0, QEMU_OPTION_localtime },
{ "std-vga", 0, QEMU_OPTION_std_vga },
{ "monitor", 1, QEMU_OPTION_monitor },
@@ -6972,6 +6984,13 @@
case QEMU_OPTION_k:
keyboard_layout = optarg;
break;
+ case QEMU_OPTION_t:
+ boot_time = optarg;
+ rtc_given = 1;
+ break;
+ case QEMU_OPTION_tfmt:
+ tfmt = optarg;
+ break;
case QEMU_OPTION_localtime:
rtc_utc = 0;
break;
--- vl.h.orig Fri Apr 6 22:51:01 2007
+++ vl.h Sat Apr 7 01:35:27 2007
@@ -119,6 +119,9 @@
extern const char *bios_dir;
+extern const char *boot_time;
+extern const char *tfmt;
+
extern int vm_running;
typedef struct vm_change_state_entry VMChangeStateEntry;
@@ -152,6 +155,7 @@
extern int ram_size;
extern int bios_size;
+extern int rtc_given;
extern int rtc_utc;
extern int cirrus_vga_enabled;
extern int graphic_width;
--
John Stalker
School of Mathematics
Trinity College Dublin
tel +353 1 896 1983
fax +353 1 896 2282
