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da185b214b
The error return conventions were confused, resulting in main exiting with success when command execution failed. Signed-off-by: Zach Brown <zab@versity.com>
89 lines
1.6 KiB
C
89 lines
1.6 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 "cmd.h"
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#include "util.h"
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static struct command {
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char *name;
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char *opts;
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char *summary;
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int (*func)(int argc, char **argv);
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} cmds[100], *next_cmd = cmds;
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#define cmd_for_each(com) for (com = cmds; com->func; com++)
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void cmd_register(char *name, char *opts, char *summary,
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int (*func)(int argc, char **argv))
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{
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struct command *com = next_cmd++;
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assert((com - cmds) < array_size(cmds));
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com->name = name;
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com->opts = opts;
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com->summary = summary;
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com->func = func;
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}
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static struct command *find_command(char *name)
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{
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struct 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 usage(void)
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{
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struct command *com;
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int largest = 0;
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fprintf(stderr, "usage: scoutfs <command> [<args>]\n"
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"Commands:\n");
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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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fprintf(stderr, " %*s %s\n %*s %s\n",
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largest, com->name, com->opts,
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largest, "", com->summary);
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}
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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 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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