disk-utils/delpart.c

   1 /*
   2  * SPDX-License-Identifier: GPL-2.0-or-later
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * Copyright (C) 2012-2023 Karel Zak <kzak@redhat.com>
  10  */
  11 #include <getopt.h>
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <fcntl.h>
  15
  16 #include "c.h"
  17 #include "nls.h"
  18 #include "partx.h"
  19 #include "strutils.h"
  20
  21 static void __attribute__((__noreturn__)) usage(void)
  22 {
  23         FILE *out = stdout;
  24         fputs(USAGE_HEADER, out);
  25         fprintf(out, _(" %s <disk device> <partition number>\n"),
  26                 program_invocation_short_name);
  27
  28         fputs(USAGE_SEPARATOR, out);
  29         fputs(_("Tell the kernel to forget about a specified partition.\n"), out);
  30
  31         fputs(USAGE_OPTIONS, out);
  32         fprintf(out, USAGE_HELP_OPTIONS(16));
  33         fprintf(out, USAGE_MAN_TAIL("delpart(8)"));
  34         exit(EXIT_SUCCESS);
  35 }
  36
  37 int main(int argc, char **argv)
  38 {
  39         int c, fd;
  40
  41         static const struct option longopts[] = {
  42                 {"help",    no_argument, NULL, 'h'},
  43                 {"version", no_argument, NULL, 'V'},
  44                 {NULL, 0, NULL, 0},
  45         };
  46
  47         setlocale(LC_ALL, "");
  48         bindtextdomain(PACKAGE, LOCALEDIR);
  49         textdomain(PACKAGE);
  50
  51         while ((c = getopt_long(argc, argv, "Vh", longopts, NULL)) != -1)
  52                 switch (c) {
  53                 case 'V':
  54                         print_version(EXIT_SUCCESS);
  55                 case 'h':
  56                         usage();
  57                 default:
  58                         errtryhelp(EXIT_FAILURE);
  59                 }
  60
  61         if (argc != 3) {
  62                 warnx(_("not enough arguments"));
  63                 errtryhelp(EXIT_FAILURE);
  64         }
  65
  66
  67         if ((fd = open(argv[1], O_RDONLY)) < 0)
  68                 err(EXIT_FAILURE, _("cannot open %s"), argv[1]);
  69
  70         if (partx_del_partition(fd,
  71                         strtou32_or_err(argv[2], _("invalid partition number argument"))))
  72                 err(EXIT_FAILURE, _("failed to remove partition"));
  73
  74         return EXIT_SUCCESS;
  75 }