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https://gitlab.com/qemu-project/qemu
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QemuOpts: add -set option
One use case will be file for drives (no filename quoting issues), i.e. -drive id=test,if=virtio -set drive.test.file=/vmdisk/test-virtio.img It will work for any other option (assuming handled by QemuOpts) though. Except for id= for obvious reasons ;). Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Message-Id:
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@ -71,3 +71,44 @@ QemuOptsList qemu_drive_opts = {
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},
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};
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static QemuOptsList *lists[] = {
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&qemu_drive_opts,
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NULL,
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};
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int qemu_set_option(const char *str)
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{
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char group[64], id[64], arg[64];
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QemuOpts *opts;
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int i, rc, offset;
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rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
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if (rc < 3 || str[offset] != '=') {
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fprintf(stderr, "can't parse: \"%s\"\n", str);
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return -1;
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}
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for (i = 0; lists[i] != NULL; i++) {
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if (strcmp(lists[i]->name, group) == 0)
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break;
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}
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if (lists[i] == NULL) {
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fprintf(stderr, "there is no option group \"%s\"\n", group);
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return -1;
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}
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opts = qemu_opts_find(lists[i], id);
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if (!opts) {
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fprintf(stderr, "there is no %s \"%s\" defined\n",
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lists[i]->name, id);
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return -1;
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}
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if (-1 == qemu_opt_set(opts, arg, str+offset+1)) {
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fprintf(stderr, "failed to set \"%s\" for %s \"%s\"\n",
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arg, lists[i]->name, id);
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return -1;
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}
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return 0;
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}
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@ -1 +1,3 @@
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extern QemuOptsList qemu_drive_opts;
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int qemu_set_option(const char *str);
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@ -95,8 +95,12 @@ DEF("drive", HAS_ARG, QEMU_OPTION_drive,
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"-drive [file=file][,if=type][,bus=n][,unit=m][,media=d][,index=i]\n"
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" [,cyls=c,heads=h,secs=s[,trans=t]][,snapshot=on|off]\n"
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" [,cache=writethrough|writeback|none][,format=f][,serial=s]\n"
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" [,addr=A]\n"
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" [,addr=A][,id=name]\n"
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" use 'file' as a drive image\n")
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DEF("set", HAS_ARG, QEMU_OPTION_set,
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"-set group.id.arg=value\n"
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" set <arg> parameter for item <id> of type <group>\n"
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" i.e. -set drive.$id.file=/path/to/image\n")
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STEXI
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@item -drive @var{option}[,@var{option}[,@var{option}[,...]]]
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