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[Qemu-devel] [PATCH 4/4] QemuOpts: command line switches for the config
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [PATCH 4/4] QemuOpts: command line switches for the config file. |
Date: |
Wed, 14 Oct 2009 10:39:28 +0200 |
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 <address@hidden>
---
qemu-options.hx | 5 +++++
vl.c | 30 ++++++++++++++++++++++++++++++
2 files changed, 35 insertions(+), 0 deletions(-)
diff --git a/qemu-options.hx b/qemu-options.hx
index 3dd76b3..6cbf9e2 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -1682,3 +1682,8 @@ 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")
diff --git a/vl.c b/vl.c
index afe01af..ad902fe 100644
--- a/vl.c
+++ b/vl.c
@@ -5513,6 +5513,36 @@ 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;
+ }
}
}
}
--
1.6.2.5
- [Qemu-devel] [PATCH 0/4] QemuOpts: config file support., Gerd Hoffmann, 2009/10/14
- [Qemu-devel] [PATCH 1/4] QemuOpts: add find_list(), Gerd Hoffmann, 2009/10/14
- [Qemu-devel] [PATCH 4/4] QemuOpts: command line switches for the config file.,
Gerd Hoffmann <=
- [Qemu-devel] [PATCH 3/4] QemuOpts: parse config from file., Gerd Hoffmann, 2009/10/14
- [Qemu-devel] [PATCH 2/4] QemuOpts: dump config., Gerd Hoffmann, 2009/10/14
- Re: [Qemu-devel] [PATCH 0/4] QemuOpts: config file support., Anthony Liguori, 2009/10/14
- Re: [Qemu-devel] [PATCH 0/4] QemuOpts: config file support., Anthony Liguori, 2009/10/14