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qemu-io: Let command functions return error code

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This is basically what everything else in the qemu code base does, so we
can do it here, too.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20180509194302.21585-3-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Max Reitz 2018-05-09 21:42:59 +02:00
parent b444d0e9d1
commit b32d7a39af
3 changed files with 232 additions and 157 deletions
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9
include/qemu-io.h
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@ -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);