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[Qemu-devel] Trivial (but useful) patch to save qemu pid to file
From: |
Nile Geisinger |
Subject: |
[Qemu-devel] Trivial (but useful) patch to save qemu pid to file |
Date: |
Wed, 8 Dec 2004 00:07:27 +0000 |
User-agent: |
KMail/1.6 |
Hi everyone,
Here's a very trivial patch that allows qemu's pid to be saved to a file. This
is useful if you're using qemu as a service, instrumenting
it with other code, or doing other unixy things,
cheers,
Nile
---------------------------------------------------------------------------------------------------
diff -bur qemu-copy/vl.c qemu/vl.c
--- qemu-copy/vl.c 2004-12-07 22:11:54.898668344 -0500
+++ qemu/vl.c 2004-12-08 00:11:34.232243744 -0500
@@ -2549,6 +2549,7 @@
" (default is CL-GD5446 PCI VGA)\n"
#endif
"-loadvm file start right away with a saved state (loadvm in
monitor)\n"
+ "-pid file save the qemu process id to a file\n"
"\n"
"During emulation, the following keys are useful:\n"
"ctrl-alt-f toggle full screen\n"
@@ -2619,6 +2620,7 @@
QEMU_OPTION_prep,
QEMU_OPTION_localtime,
QEMU_OPTION_cirrusvga,
+ QEMU_OPTION_pid,
QEMU_OPTION_g,
QEMU_OPTION_std_vga,
QEMU_OPTION_monitor,
@@ -2689,6 +2691,7 @@
/* temporary options */
{ "pci", 0, QEMU_OPTION_pci },
{ "cirrusvga", 0, QEMU_OPTION_cirrusvga },
+ { "pid", HAS_ARG, QEMU_OPTION_pid },
{ NULL },
};
@@ -2765,6 +2768,8 @@
char serial_devices[MAX_SERIAL_PORTS][128];
int serial_device_index;
const char *loadvm = NULL;
+ int pid;
+ FILE * pid_file;
#if !defined(CONFIG_SOFTMMU)
/* we never want that malloc() uses mmap() */
@@ -3110,6 +3115,11 @@
case QEMU_OPTION_full_screen:
full_screen = 1;
break;
+ case QEMU_OPTION_pid:
+ pid = getpid();
+ pid_file = fopen(optarg, "w");
+ fprintf(pid_file, "%d", pid);
+ fclose(pid_file);
}
}
}