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QemuOpts: command line switches for the config file.

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Adds -readconfig and -writeconfig command line switches to read/write
QemuOpts from config file.

In theory you should be able to do:

  qemu < machine config cmd line switches here > -writeconfig vm.cfg
  qemu -readconfig vm.cfg

In practice it will not work.  Not all command line switches are
converted to QemuOpts, so you'll have to keep the not-yet converted ones
on the second line.  Also there might be bugs lurking which prevent even
the converted ones from working correctly.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gerd Hoffmann 2009-10-14 10:39:28 +02:00 committed by Anthony Liguori
parent 42262ba860
commit 715a664ac4
2 changed files with 35 additions and 0 deletions
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5
qemu-options.hx
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@ -1915,3 +1915,8 @@ DEF("semihosting", 0, QEMU_OPTION_semihosting,
DEF("old-param", 0, QEMU_OPTION_old_param,
"-old-param old param mode\n")
#endif
DEF("readconfig", HAS_ARG, QEMU_OPTION_readconfig,
"-readconfig <file>\n")
DEF("writeconfig", HAS_ARG, QEMU_OPTION_writeconfig,
"-writeconfig <file>\n"
" read/write config file")

30
vl.c
View File

@ -5364,6 +5364,36 @@ int main(int argc, char **argv, char **envp)
xen_mode = XEN_ATTACH;
break;
#endif
case QEMU_OPTION_readconfig:
{
FILE *fp;
fp = fopen(optarg, "r");
if (fp == NULL) {
fprintf(stderr, "open %s: %s\n", optarg, strerror(errno));
exit(1);
}
if (qemu_config_parse(fp) != 0) {
exit(1);
}
fclose(fp);
break;
}
case QEMU_OPTION_writeconfig:
{
FILE *fp;
if (strcmp(optarg, "-") == 0) {
fp = stdout;
} else {
fp = fopen(optarg, "w");
if (fp == NULL) {
fprintf(stderr, "open %s: %s\n", optarg, strerror(errno));
exit(1);
}
}
qemu_config_write(fp);
fclose(fp);
break;
}
}
}
}