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Move the usage and command name lookup into functions.

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This commit is contained in:
Warner Losh 2017-02-04 05:52:53 +00:00
parent 29740f4ce1
commit ccac2ba7ec
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=313190
2 changed files with 30 additions and 20 deletions
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40
sbin/nvmecontrol/nvmecontrol.c
View File

@ -45,13 +45,8 @@ __FBSDID("$FreeBSD$");
#include "nvmecontrol.h"
typedef void (*nvme_fn_t)(int argc, char *argv[]);
static struct nvme_function {
const char *name;
nvme_fn_t fn;
const char *usage;
} funcs[] = {
static struct nvme_function funcs[] = {
{"devlist", devlist, DEVLIST_USAGE},
{"identify", identify, IDENTIFY_USAGE},
{"perftest", perftest, PERFTEST_USAGE},
@ -62,12 +57,10 @@ static struct nvme_function {
{NULL, NULL, NULL},
};
static void
usage(void)
void
gen_usage(struct nvme_function *f)
{
struct nvme_function *f;
f = funcs;
fprintf(stderr, "usage:\n");
while (f->name != NULL) {
fprintf(stderr, "%s", f->usage);
@ -76,6 +69,21 @@ usage(void)
exit(1);
}
void
dispatch(int argc, char *argv[], struct nvme_function *tbl)
{
struct nvme_function *f = tbl;
while (f->name != NULL) {
if (strcmp(argv[1], f->name) == 0)
f->fn(argc-1, &argv[1]);
f++;
}
fprintf(stderr, "Unknown command: %s\n", argv[1]);
gen_usage(tbl);
}
static void
print_bytes(void *data, uint32_t length)
{
@ -217,19 +225,11 @@ parse_ns_str(const char *ns_str, char *ctrlr_str, int *nsid)
int
main(int argc, char *argv[])
{
struct nvme_function *f;
if (argc < 2)
usage();
gen_usage(funcs);
f = funcs;
while (f->name != NULL) {
if (strcmp(argv[1], f->name) == 0)
f->fn(argc-1, &argv[1]);
f++;
}
usage();
dispatch(argc, argv, funcs);
return (0);
}

10
sbin/nvmecontrol/nvmecontrol.h
View File

@ -31,6 +31,14 @@
#include <dev/nvme/nvme.h>
typedef void (*nvme_fn_t)(int argc, char *argv[]);
struct nvme_function {
const char *name;
nvme_fn_t fn;
const char *usage;
};
#define NVME_CTRLR_PREFIX "nvme"
#define NVME_NS_PREFIX "ns"
@ -73,6 +81,8 @@ void read_namespace_data(int fd, int nsid, struct nvme_namespace_data *nsdata);
void print_hex(void *data, uint32_t length);
void read_logpage(int fd, uint8_t log_page, int nsid, void *payload,
uint32_t payload_size);
void gen_usage(struct nvme_function *);
void dispatch(int argc, char *argv[], struct nvme_function *f);
#endif