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https://github.com/versity/scoutfs.git
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366f615c9f
We had previously started on a relatively simple notion of an interoperability version which wasn't quite right. This fleshes out support for a more functional format version. The super blocks have a single version that defines behaviour of the running system. The code supports a range of versions and we add some initial interfaces for updating the version while the system is offline. All of this together should let us safely change the underlying format over time. Signed-off-by: Zach Brown <zab@versity.com>
114 lines
2.5 KiB
C
114 lines
2.5 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdbool.h>
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#include <string.h>
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#include <assert.h>
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#include <argp.h>
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#include "cmd.h"
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#include "util.h"
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#include "format.h"
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static struct argp_command {
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char *name;
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struct argp *argp;
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int group;
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int (*func)(int argc, char **argv);
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} argp_cmds[100], *next_argp_cmd = argp_cmds;
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#define cmd_for_each(com) for (com = argp_cmds; com->func; com++)
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void cmd_register_argp(char *name, struct argp *argp, int group,
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int (*func)(int argc, char **argv))
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{
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struct argp_command *com = next_argp_cmd++;
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assert((com - argp_cmds) < array_size(argp_cmds));
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com->name = name;
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com->argp = argp;
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com->group = group;
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com->func = func;
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}
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static struct argp_command *find_command(char *name)
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{
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struct argp_command *com;
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cmd_for_each(com) {
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if (!strcmp(name, com->name))
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return com;
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}
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return NULL;
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}
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static void print_cmds_for_group(int group)
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{
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struct argp_command *com;
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int largest = 0;
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/* Base alignment on all groups */
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cmd_for_each(com)
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largest = max(strlen(com->name), largest);
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cmd_for_each(com) {
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if (com->group == group) {
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fprintf(stderr, " %*s %s\n %*s %s\n",
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largest, com->name, com->argp->args_doc,
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largest, "", com->argp->doc);
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}
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}
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}
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static void usage(void)
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{
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fprintf(stderr, "usage: scoutfs <command> [<args>]\n\n");
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fprintf(stderr, "Selected fs defaults to current working directory.\n");
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fprintf(stderr, "See <command> --help for more details.\n");
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fprintf(stderr, "\nSupported format version: %u-%u\n",
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SCOUTFS_FORMAT_VERSION_MIN, SCOUTFS_FORMAT_VERSION_MAX);
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fprintf(stderr, "\nCore admin:\n");
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print_cmds_for_group(GROUP_CORE);
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fprintf(stderr, "\nAdditional Information:\n");
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print_cmds_for_group(GROUP_INFO);
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fprintf(stderr, "\nSearch Acceleration:\n");
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print_cmds_for_group(GROUP_SEARCH);
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fprintf(stderr, "\nArchival Agent Support:\n");
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print_cmds_for_group(GROUP_AGENT);
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fprintf(stderr, "\nDebugging commands:\n");
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print_cmds_for_group(GROUP_DEBUG);
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}
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/* this returns a positive unix return code on error for some reason */
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char cmd_execute(int argc, char **argv)
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{
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struct argp_command *com = NULL;
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int ret;
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if (argc > 1) {
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com = find_command(argv[1]);
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if (!com)
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fprintf(stderr, "scoutfs: unrecognized command: '%s'\n",
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argv[1]);
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}
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if (!com) {
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usage();
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return 1;
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}
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ret = com->func(argc - 1, argv + 1);
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if (ret < 0) {
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fprintf(stderr, "scoutfs: %s failed: %s (%d)\n",
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com->name, strerror(-ret), -ret);
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return 1;
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}
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return 0;
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}
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