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qemu_create_pidfile implementation for Win32, based on a patch by

Browse source 
Carlos O'Donell.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2540 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
ths 2007-03-25 21:33:06 +00:00
parent 209afb9e0d
commit aa26bb2dac
3 changed files with 51 additions and 24 deletions
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48
osdep.c
View file

@ -27,6 +27,7 @@
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#ifdef HOST_SOLARIS
#include <sys/types.h>
#include <sys/statvfs.h>
@ -216,3 +217,50 @@ char *qemu_strdup(const char *str)
strcpy(ptr, str);
return ptr;
}
int qemu_create_pidfile(const char *filename)
{
char buffer[128];
int len;
#ifndef _WIN32
int fd;
fd = open(filename, O_RDWR | O_CREAT, 0600);
if (fd == -1)
return -1;
if (lockf(fd, F_TLOCK, 0) == -1)
return -1;
len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
if (write(fd, buffer, len) != len)
return -1;
#else
HANDLE file;
DWORD flags;
OVERLAPPED overlap;
BOOL ret;
/* Open for writing with no sharing. */
file = CreateFile(filename, GENERIC_WRITE, 0, NULL,
OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (file == INVALID_HANDLE_VALUE)
return -1;
flags = LOCKFILE_EXCLUSIVE_LOCK | LOCKFILE_FAIL_IMMEDIATELY;
overlap.hEvent = 0;
/* Lock 1 byte. */
ret = LockFileEx(file, flags, 0, 0, 1, &overlap);
if (ret == 0)
return -1;
/* Write PID to file. */
len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
ret = WriteFileEx(file, (LPCVOID)buffer, (DWORD)len,
&overlap, NULL);
if (ret == 0)
return -1;
#endif
return 0;
}

2
osdep.h
View file

@ -15,4 +15,6 @@ void qemu_vfree(void *ptr);
void *get_mmap_addr(unsigned long size);
int qemu_create_pidfile(const char *filename);
#endif

25
vl.c
View file

@ -4403,29 +4403,6 @@ void usb_info(void)
}
}
static int create_pidfile(const char *filename)
{
int fd;
char buffer[128];
int len;
fd = open(filename, O_RDWR | O_CREAT, 0600);
if (fd == -1)
return -1;
/* XXX: No locking for Win32 implemented */
#ifndef _WIN32
if (lockf(fd, F_TLOCK, 0) == -1)
return -1;
#endif
len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
if (write(fd, buffer, len) != len)
return -1;
return 0;
}
/***********************************************************/
/* dumb display */
@ -7405,7 +7382,7 @@ int main(int argc, char **argv)
}
#endif
if (pid_file && create_pidfile(pid_file) != 0) {
if (pid_file && qemu_create_pidfile(pid_file) != 0) {
if (daemonize) {
uint8_t status = 1;
write(fds[1], &status, 1);