mtd_probe: convert to the new option parser

The commandline check is tightened. Previously the program would
crash if called without an argument.

Co-developed-by: Claude Opus 4.7 <noreply@anthropic.com>

src/udev/mtd_probe/mtd_probe.c

@@ -19,48 +19,59 @@
  */
 
 #include <fcntl.h>
-#include <getopt.h>
 #include <mtd/mtd-user.h>
-#include <stdio.h>
 #include <sys/ioctl.h>
 
 #include "build.h"
 #include "errno-util.h"
 #include "fd-util.h"
+#include "format-table.h"
+#include "help-util.h"
 #include "log.h"
 #include "main-func.h"
 #include "mtd_probe.h"
+#include "options.h"
+#include "strv.h"
 
 static const char *arg_device = NULL;
 
-static int parse_argv(int argc, char *argv[]) {
-        static const struct option options[] = {
-                { "help",     no_argument, NULL, 'h' },
-                { "version",  no_argument, NULL, 'v' },
-                {}
-        };
-        int c;
+static int help(void) {
+        _cleanup_(table_unrefp) Table *options = NULL;
+        int r;
 
-        while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
+        r = option_parser_get_help_table(&options);
+        if (r < 0)
+                return r;
+
+        help_cmdline("[OPTIONS...] /dev/mtd[n]");
+        help_abstract("Probe MTD devices.");
+        help_section("Options:");
+
+        return table_print_or_warn(options);
+}
+
+static int parse_argv(int argc, char *argv[]) {
+        assert(argc >= 0);
+        assert(argv);
+
+        OptionParser state = { argc, argv };
+        const char *arg;
+
+        FOREACH_OPTION(&state, c, &arg, /* on_error= */ return c)
                 switch (c) {
-                case 'h':
-                        printf("%s /dev/mtd[n]\n\n"
-                               "  -h --help     Show this help text\n"
-                               "     --version  Show package version\n",
-                               program_invocation_short_name);
-                        return 0;
-                case 'v':
+
+                OPTION_COMMON_HELP:
+                        return help();
+
+                OPTION_COMMON_VERSION:
                         return version();
-                case '?':
-                        return -EINVAL;
-                default:
-                        assert_not_reached();
                 }
 
-        if (argc > 2)
-                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Error: unexpected argument.");
+        char **args = option_parser_get_args(&state);
+        if (strv_length(args) != 1)
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Need exactly one DEVICE argument.");
 
-        arg_device = argv[optind];
+        arg_device = args[0];
         return 1;
 }
 
@@ -73,12 +84,12 @@ static int run(int argc, char** argv) {
         if (r <= 0)
                 return r;
 
-        mtd_fd = open(argv[1], O_RDONLY|O_CLOEXEC|O_NOCTTY);
+        mtd_fd = open(arg_device, O_RDONLY|O_CLOEXEC|O_NOCTTY);
         if (mtd_fd < 0) {
                 bool ignore = ERRNO_IS_DEVICE_ABSENT_OR_EMPTY(errno);
                 log_full_errno(ignore ? LOG_DEBUG : LOG_WARNING, errno,
                                "Failed to open device node '%s'%s: %m",
-                               argv[1], ignore ? ", ignoring" : "");
+                               arg_device, ignore ? ", ignoring" : "");
                 return ignore ? 0 : -errno;
         }