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scoutfs-utils: add stat -s option

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Lots of tests run scout stat and parse a single value.  Give them an
option to have the only output be that value so they don't have to pull
it out of the output.

Signed-off-by: Zach Brown <zab@versity.com>
This commit is contained in:
Zach Brown
2018-02-14 11:58:21 -08:00
committed by Zach Brown
parent 02204c36fc
commit ac1065014b
1 changed files with 69 additions and 14 deletions
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83
utils/src/stat.c
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@@ -7,6 +7,8 @@
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <getopt.h>
#include <assert.h>
#include "sparse.h"
#include "util.h"
@@ -14,20 +16,75 @@
#include "ioctl.h"
#include "cmd.h"
#define FIELD(f) { \
.name = #f, \
.offset = offsetof(struct scoutfs_ioctl_stat_more, f), \
}
static struct stat_more_field {
char *name;
size_t offset;
} fields[] = {
FIELD(meta_seq),
FIELD(data_seq),
FIELD(data_version),
FIELD(online_blocks),
FIELD(offline_blocks),
{ NULL, }
};
#define for_each_field(f) \
for (f = fields; f->name; f++)
static struct option long_ops[] = {
{ "single_field", 1, NULL, 's' },
{ NULL, 0, NULL, 0}
};
static int stat_more_cmd(int argc, char **argv)
{
struct scoutfs_ioctl_stat_more stm;
struct stat_more_field *single = NULL;
struct stat_more_field *fi;
char *single_name = NULL;
char *path;
int ret;
int fd;
int i;
int c;
if (argc == 1) {
while ((c = getopt_long(argc, argv, "s:", long_ops, NULL)) != -1) {
switch (c) {
case 's':
single_name = strdup(optarg);
assert(single_name);
break;
case '?':
default:
return -EINVAL;
}
}
if (single_name) {
for_each_field(fi) {
if (strcmp(fi->name, single_name) == 0) {
single = fi;
break;
}
}
if (!single) {
fprintf(stderr, "unknown stat_more field: '%s'\n",
single_name);
return -EINVAL;
}
}
if (optind >= argc) {
fprintf(stderr, "must specify at least one path argument\n");
return -EINVAL;
}
for (i = 1; i < argc; i++) {
for (i = optind; i < argc; i++) {
path = argv[i];
fd = open(path, O_RDONLY);
@@ -46,19 +103,17 @@ static int stat_more_cmd(int argc, char **argv)
ret = -errno;
fprintf(stderr, "stat_more ioctl failed on '%s': "
"%s (%d)\n", path, strerror(errno), errno);
} else if (single) {
printf("%llu\n",
*(u64 *)((void *)&stm + single->offset));
} else {
printf("path %s\n"
"meta_seq %llu\n"
"data_seq %llu\n"
"data_version %llu\n"
"online_blocks %llu\n"
"offline_blocks %llu\n",
path,
stm.meta_seq,
stm.data_seq,
stm.data_version,
stm.online_blocks,
stm.offline_blocks);
printf("%-17s %s\n", "path", path);
for_each_field(fi) {
printf("%-17s %llu\n", fi->name,
*(u64 *)((void *)&stm + fi->offset));
}
}
close(fd);