qemu-char: Print strerror message on failure

The only way for chardev drivers to communicate an error was to return a NULL
pointer, which resulted in an error message that said _that_ something went
wrong, but not _why_.

This patch changes the interface to return 0/-errno and updates
qemu_chr_open_opts to use strerror to display a more helpful error message.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Kevin Wolf 2011-06-01 13:29:11 +02:00 committed by Anthony Liguori
parent 84682834eb
commit 6e1db57b2a
8 changed files with 117 additions and 83 deletions

View file

@ -42,7 +42,7 @@ int qemu_spice_migrate_info(const char *hostname, int port, int tls_port,
void do_info_spice_print(Monitor *mon, const QObject *data);
void do_info_spice(Monitor *mon, QObject **ret_data);
CharDriverState *qemu_chr_open_spice(QemuOpts *opts);
int qemu_chr_open_spice(QemuOpts *opts, CharDriverState **_chr);
#else /* CONFIG_SPICE */