From b32d7a39af488d280ce5f02a2ed94871d696f87a Mon Sep 17 00:00:00 2001 From: Max Reitz Date: Wed, 9 May 2018 21:42:59 +0200 Subject: qemu-io: Let command functions return error code This is basically what everything else in the qemu code base does, so we can do it here, too. Signed-off-by: Max Reitz Reviewed-by: Eric Blake Message-id: 20180509194302.21585-3-mreitz@redhat.com Signed-off-by: Max Reitz --- include/qemu-io.h | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'include/qemu-io.h') diff --git a/include/qemu-io.h b/include/qemu-io.h index 06cdfbf660..7433239372 100644 --- a/include/qemu-io.h +++ b/include/qemu-io.h @@ -22,7 +22,12 @@ #define CMD_FLAG_GLOBAL ((int)0x80000000) /* don't iterate "args" */ -typedef void (*cfunc_t)(BlockBackend *blk, int argc, char **argv); +/* Implement a qemu-io command. + * Operate on @blk using @argc/@argv as the command's arguments, and + * return 0 on success or negative errno on failure. + */ +typedef int (*cfunc_t)(BlockBackend *blk, int argc, char **argv); + typedef void (*helpfunc_t)(void); typedef struct cmdinfo { @@ -41,7 +46,7 @@ typedef struct cmdinfo { extern bool qemuio_misalign; -void qemuio_command(BlockBackend *blk, const char *cmd); +int qemuio_command(BlockBackend *blk, const char *cmd); void qemuio_add_command(const cmdinfo_t *ci); void qemuio_command_usage(const cmdinfo_t *ci); -- cgit v1.2.3