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Load global config files by default
A new option, -nodefconfig is introduced to prevent loading from the default config location. Otherwise, two configuration files will be searched for, qemu.conf and target-<TARGET_NAME>.conf. To ensure that the default configuration is overridden by a user specified config, we introduce a two stage option parsing mechanism. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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@ -1965,6 +1965,15 @@ STEXI
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@item -writeconfig @var{file}
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Write device configuration to @var{file}.
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ETEXI
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DEF("nodefconfig", 0, QEMU_OPTION_nodefconfig,
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"-nodefconfig\n"
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" do not load default config files at startup\n")
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STEXI
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@item -nodefconfig
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Normally QEMU loads a configuration file from @var{sysconfdir}/qemu.conf and
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@var{sysconfdir}/target-@var{ARCH}.conf on startup. The @code{-nodefconfig}
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option will prevent QEMU from loading these configuration files at startup.
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ETEXI
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HXCOMM This is the last statement. Insert new options before this line!
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STEXI
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39
vl.c
39
vl.c
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@ -4730,6 +4730,7 @@ int main(int argc, char **argv, char **envp)
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#endif
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CPUState *env;
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int show_vnc_port = 0;
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int defconfig = 1;
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init_clocks();
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@ -4789,6 +4790,44 @@ int main(int argc, char **argv, char **envp)
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tb_size = 0;
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autostart= 1;
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/* first pass of option parsing */
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optind = 1;
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while (optind < argc) {
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if (argv[optind][0] != '-') {
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/* disk image */
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continue;
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} else {
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const QEMUOption *popt;
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popt = lookup_opt(argc, argv, &optarg, &optind);
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switch (popt->index) {
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case QEMU_OPTION_nodefconfig:
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defconfig=0;
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break;
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}
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}
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}
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if (defconfig) {
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FILE *fp;
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fp = fopen(CONFIG_QEMU_CONFDIR "/qemu.conf", "r");
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if (fp) {
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if (qemu_config_parse(fp) != 0) {
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exit(1);
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}
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fclose(fp);
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}
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fp = fopen(CONFIG_QEMU_CONFDIR "/target-" TARGET_ARCH ".conf", "r");
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if (fp) {
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if (qemu_config_parse(fp) != 0) {
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exit(1);
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}
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fclose(fp);
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}
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}
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/* second pass of option parsing */
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optind = 1;
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for(;;) {
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if (optind >= argc)
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