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qemu-io: Move 'help' function

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No reason to treat it different from other commands. Move it to
qemu-io-cmds.c, adapt the coding style and register it like any other
command.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Kevin Wolf
2013-06-05 14:19:33 +02:00
committed by Stefan Hajnoczi
parent dd5832967a
commit f18a834a92
3 changed files with 66 additions and 81 deletions
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67
qemu-io-cmds.c
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@@ -1795,6 +1795,71 @@ static const cmdinfo_t abort_cmd = {
.oneline = "simulate a program crash using abort(3)",
};
static void help_oneline(const char *cmd, const cmdinfo_t *ct)
{
if (cmd) {
printf("%s ", cmd);
} else {
printf("%s ", ct->name);
if (ct->altname) {
printf("(or %s) ", ct->altname);
}
}
if (ct->args) {
printf("%s ", ct->args);
}
printf("-- %s\n", ct->oneline);
}
static void help_onecmd(const char *cmd, const cmdinfo_t *ct)
{
help_oneline(cmd, ct);
if (ct->help) {
ct->help();
}
}
static void help_all(void)
{
const cmdinfo_t *ct;
for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
help_oneline(ct->name, ct);
}
printf("\nUse 'help commandname' for extended help.\n");
}
static int help_f(BlockDriverState *bs, int argc, char **argv)
{
const cmdinfo_t *ct;
if (argc == 1) {
help_all();
return 0;
}
ct = find_command(argv[1]);
if (ct == NULL) {
printf("command %s not found\n", argv[1]);
return 0;
}
help_onecmd(argv[1], ct);
return 0;
}
static const cmdinfo_t help_cmd = {
.name = "help",
.altname = "?",
.cfunc = help_f,
.argmin = 0,
.argmax = 1,
.flags = CMD_FLAG_GLOBAL,
.args = "[command]",
.oneline = "help for one or all commands",
};
static int init_check_command(BlockDriverState *bs, const cmdinfo_t *ct)
{
if (ct->flags & CMD_FLAG_GLOBAL) {
@@ -1834,7 +1899,7 @@ bool qemuio_command(const char *cmd)
static void __attribute((constructor)) init_qemuio_commands(void)
{
/* initialize commands */
help_init();
add_command(&help_cmd);
add_command(&read_cmd);
add_command(&readv_cmd);
add_command(&write_cmd);