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chardev: add file chardev support to chardev-add (qmp)

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Add support for file chardevs.  Output file is mandatory,
input file is optional.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2012-12-19 13:13:57 +01:00
parent f108890891
commit ffbdbe59ac
3 changed files with 83 additions and 2 deletions
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61
qemu-char.c
View file

@ -3011,6 +3011,64 @@ QemuOptsList qemu_chardev_opts = {
},
};
#ifdef _WIN32
static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
{
HANDLE out;
if (file->in) {
error_setg(errp, "input file not supported");
return NULL;
}
out = CreateFile(file->out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (out == INVALID_HANDLE_VALUE) {
error_setg(errp, "open %s failed", file->out);
return NULL;
}
return qemu_chr_open_win_file(out);
}
#else /* WIN32 */
static int qmp_chardev_open_file_source(char *src, int flags,
Error **errp)
{
int fd = -1;
TFR(fd = qemu_open(src, flags, 0666));
if (fd == -1) {
error_setg(errp, "open %s: %s", src, strerror(errno));
}
return fd;
}
static CharDriverState *qmp_chardev_open_file(ChardevFile *file, Error **errp)
{
int flags, in = -1, out = -1;
flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY;
out = qmp_chardev_open_file_source(file->out, flags, errp);
if (error_is_set(errp)) {
return NULL;
}
if (file->in) {
flags = O_RDONLY;
in = qmp_chardev_open_file_source(file->in, flags, errp);
if (error_is_set(errp)) {
qemu_close(out);
return NULL;
}
}
return qemu_chr_open_fd(in, out);
}
#endif /* WIN32 */
ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
Error **errp)
{
@ -3025,6 +3083,9 @@ ChardevReturn *qmp_chardev_add(const char *id, ChardevBackend *backend,
}
switch (backend->kind) {
case CHARDEV_BACKEND_KIND_FILE:
chr = qmp_chardev_open_file(backend->file, errp);
break;
case CHARDEV_BACKEND_KIND_NULL:
chr = qemu_chr_open_null(NULL);
break;