/*
* Opens a file with FD_CLOEXEC set
*/
int qemu_open(const char *name, int flags, ...)
{
int ret;
int mode = 0;
#ifndef _WIN32
const char *fdset_id_str;
/* Attempt dup of fd from fd set */
if (strstart(name, "/dev/fdset/", &fdset_id_str)) {
int64_t fdset_id;
int fd, dupfd;
fdset_id = qemu_parse_fdset(fdset_id_str);
if (fdset_id == -1) {
errno = EINVAL;
return -1;
}
fd = monitor_fdset_get_fd(fdset_id, flags);
if (fd == -1) {
return -1;
}
dupfd = qemu_dup_flags(fd, flags);
if (dupfd == -1) {
return -1;
}
ret = monitor_fdset_dup_fd_add(fdset_id, dupfd);
if (ret == -1) {
close(dupfd);
errno = EINVAL;
return -1;
}
return dupfd;
}
#endif
if (flags & O_CREAT) {
va_list ap;
va_start(ap, flags);
mode = va_arg(ap, int);
va_end(ap);
}
int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive)
{
int ret;
struct flock fl = {
.l_whence = SEEK_SET,
.l_start = start,
.l_len = len,
.l_type = exclusive ? F_WRLCK : F_RDLCK,
};
qemu_probe_lock_ops();
ret = fcntl(fd, fcntl_op_getlk, &fl);
if (ret == -1) {
return -errno;
} else {
return fl.l_type == F_UNLCK ? 0 : -EAGAIN;
}
}
#endif
/*
* Opens a file with FD_CLOEXEC set
*/
int qemu_open(const char *name, int flags, ...)
{
int ret;
int mode = 0;
#ifndef _WIN32
const char *fdset_id_str;
/* Attempt dup of fd from fd set */
if (strstart(name, "/dev/fdset/", &fdset_id_str)) {
int64_t fdset_id;
int fd, dupfd;
fdset_id = qemu_parse_fdset(fdset_id_str);
if (fdset_id == -1) {
errno = EINVAL;
return -1;
}
fd = monitor_fdset_get_fd(fdset_id, flags);
if (fd == -1) {
return -1;
}
dupfd = qemu_dup_flags(fd, flags);
if (dupfd == -1) {
return -1;
}
ret = monitor_fdset_dup_fd_add(fdset_id, dupfd);
if (ret == -1) {
close(dupfd);
errno = EINVAL;
return -1;
}
return dupfd;
}
#endif
if (flags & O_CREAT) {
va_list ap;
va_start(ap, flags);
mode = va_arg(ap, int);
va_end(ap);
}