arch/all-pc/boot/grub2-aros/util/grub-script-check.c

   1 /* grub-script-check.c - check grub script file for syntax errors */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2009,2010  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <config.h>
  21 #include <grub/types.h>
  22 #include <grub/mm.h>
  23 #include <grub/misc.h>
  24 #include <grub/emu/misc.h>
  25 #include <grub/util/misc.h>
  26 #include <grub/i18n.h>
  27 #include <grub/parser.h>
  28 #include <grub/script_sh.h>
  29
  30 #define _GNU_SOURCE     1
  31
  32 #include <ctype.h>
  33 #include <errno.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #pragma GCC diagnostic ignored "-Wmissing-prototypes"
  38 #pragma GCC diagnostic ignored "-Wmissing-declarations"
  39 #include <argp.h>
  40 #pragma GCC diagnostic error "-Wmissing-prototypes"
  41 #pragma GCC diagnostic error "-Wmissing-declarations"
  42
  43 #include "progname.h"
  44
  45 struct arguments
  46 {
  47   int verbose;
  48   char *filename;
  49 };
  50
  51 static struct argp_option options[] = {
  52   {"verbose",     'v', 0,      0, N_("print verbose messages."), 0},
  53   { 0, 0, 0, 0, 0, 0 }
  54 };
  55
  56 static error_t
  57 argp_parser (int key, char *arg, struct argp_state *state)
  58 {
  59   /* Get the input argument from argp_parse, which we
  60      know is a pointer to our arguments structure. */
  61   struct arguments *arguments = state->input;
  62
  63   switch (key)
  64     {
  65     case 'v':
  66       arguments->verbose = 1;
  67       break;
  68
  69     case ARGP_KEY_ARG:
  70       if (state->arg_num == 0)
  71         arguments->filename = xstrdup (arg);
  72       else
  73         {
  74           /* Too many arguments. */
  75           fprintf (stderr, _("Unknown extra argument `%s'."), arg);
  76           fprintf (stderr, "\n");
  77           argp_usage (state);
  78         }
  79       break;
  80     default:
  81       return ARGP_ERR_UNKNOWN;
  82     }
  83   return 0;
  84 }
  85
  86 static struct argp argp = {
  87   options, argp_parser, N_("[PATH]"),
  88   N_("Checks GRUB script configuration file for syntax errors."),
  89   NULL, NULL, NULL
  90 };
  91
  92 /* Context for main.  */
  93 struct main_ctx
  94 {
  95   int lineno;
  96   FILE *file;
  97   struct arguments arguments;
  98 };
  99
 100 /* Helper for main.  */
 101 static grub_err_t
 102 get_config_line (char **line, int cont __attribute__ ((unused)), void *data)
 103 {
 104   struct main_ctx *ctx = data;
 105   int i;
 106   char *cmdline = 0;
 107   size_t len = 0;
 108   ssize_t curread;
 109
 110   curread = getline (&cmdline, &len, (ctx->file ?: stdin));
 111   if (curread == -1)
 112     {
 113       *line = 0;
 114       grub_errno = GRUB_ERR_READ_ERROR;
 115
 116       if (cmdline)
 117         free (cmdline);
 118       return grub_errno;
 119     }
 120
 121   if (ctx->arguments.verbose)
 122     grub_printf ("%s", cmdline);
 123
 124   for (i = 0; cmdline[i] != '\0'; i++)
 125     {
 126       /* Replace tabs and carriage returns with spaces.  */
 127       if (cmdline[i] == '\t' || cmdline[i] == '\r')
 128         cmdline[i] = ' ';
 129
 130       /* Replace '\n' with '\0'.  */
 131       if (cmdline[i] == '\n')
 132         cmdline[i] = '\0';
 133     }
 134
 135   ctx->lineno++;
 136   *line = grub_strdup (cmdline);
 137
 138   free (cmdline);
 139   return 0;
 140 }
 141
 142 int
 143 main (int argc, char *argv[])
 144 {
 145   struct main_ctx ctx = {
 146     .lineno = 0,
 147     .file = 0
 148   };
 149   char *input;
 150   int found_input = 0, found_cmd = 0;
 151   struct grub_script *script = NULL;
 152
 153   grub_util_host_init (&argc, &argv);
 154
 155   memset (&ctx.arguments, 0, sizeof (struct arguments));
 156
 157   /* Check for options.  */
 158   if (argp_parse (&argp, argc, argv, 0, 0, &ctx.arguments) != 0)
 159     {
 160       fprintf (stderr, "%s", _("Error in parsing command line arguments\n"));
 161       exit(1);
 162     }
 163
 164   /* Obtain ARGUMENT.  */
 165   if (!ctx.arguments.filename)
 166     {
 167       ctx.file = 0; /* read from stdin */
 168     }
 169   else
 170     {
 171       ctx.file = grub_util_fopen (ctx.arguments.filename, "r");
 172       if (! ctx.file)
 173         {
 174           char *program = xstrdup(program_name);
 175           fprintf (stderr, _("cannot open `%s': %s"),
 176                    ctx.arguments.filename, strerror (errno));
 177           argp_help (&argp, stderr, ARGP_HELP_STD_USAGE, program);
 178           free(program);
 179           exit(1);
 180         }
 181     }
 182
 183   do
 184     {
 185       input = 0;
 186       get_config_line (&input, 0, &ctx);
 187       if (! input)
 188         break;
 189       found_input = 1;
 190
 191       script = grub_script_parse (input, get_config_line, &ctx);
 192       if (script)
 193         {
 194           if (script->cmd)
 195             found_cmd = 1;
 196           grub_script_execute (script);
 197           grub_script_free (script);
 198         }
 199
 200       grub_free (input);
 201     } while (script != 0);
 202
 203   if (ctx.file) fclose (ctx.file);
 204
 205   if (found_input && script == 0)
 206     {
 207       fprintf (stderr, _("Syntax error at line %u\n"), ctx.lineno);
 208       return 1;
 209     }
 210   if (! found_cmd)
 211     {
 212       fprintf (stderr, _("Script `%s' contains no commands and will do nothing\n"),
 213                ctx.arguments.filename);
 214       return 1;
 215     }
 216
 217   return 0;
 218 }