/* minicmd.c - commands for the rescue mode */ /* * GRUB -- GRand Unified Bootloader * Copyright (C) 2003,2005,2006,2007,2009 Free Software Foundation, Inc. * * GRUB is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * GRUB is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with GRUB. If not, see . */ #include #include #include #include #include #include #include #include #include #include #include GRUB_MOD_LICENSE ("GPLv3+"); /* cat FILE */ static grub_err_t grub_mini_cmd_cat (struct grub_command *cmd __attribute__ ((unused)), int argc, char *argv[]) { grub_file_t file; char buf[GRUB_DISK_SECTOR_SIZE]; grub_ssize_t size; if (argc < 1) return grub_error (GRUB_ERR_BAD_ARGUMENT, "no file specified"); file = grub_file_open (argv[0]); if (! file) return grub_errno; while ((size = grub_file_read (file, buf, sizeof (buf))) > 0) { int i; for (i = 0; i < size; i++) { unsigned char c = buf[i]; if ((grub_isprint (c) || grub_isspace (c)) && c != '\r') grub_printf ("%c", c); else { grub_setcolorstate (GRUB_TERM_COLOR_HIGHLIGHT); grub_printf ("<%x>", (int) c); grub_setcolorstate (GRUB_TERM_COLOR_STANDARD); } } } grub_xputs ("\n"); grub_refresh (); grub_file_close (file); return 0; } /* help */ static grub_err_t grub_mini_cmd_help (struct grub_command *cmd __attribute__ ((unused)), int argc __attribute__ ((unused)), char *argv[] __attribute__ ((unused))) { grub_command_t p; for (p = grub_command_list; p; p = p->next) grub_printf ("%s (%d%c)\t%s\n", p->name, p->prio & GRUB_PRIO_LIST_PRIO_MASK, (p->prio & GRUB_PRIO_LIST_FLAG_ACTIVE) ? '+' : '-', p->description); return 0; } /* dump ADDRESS [SIZE] */ static grub_err_t grub_mini_cmd_dump (struct grub_command *cmd __attribute__ ((unused)), int argc, char *argv[]) { grub_uint8_t *addr; grub_size_t size = 4; if (argc == 0) return grub_error (GRUB_ERR_BAD_ARGUMENT, "no address specified"); addr = (grub_uint8_t *) grub_strtoul (argv[0], 0, 0); if (grub_errno) return grub_errno; if (argc > 1) size = (grub_size_t) grub_strtoul (argv[1], 0, 0); while (size--) { grub_printf ("%x%x ", *addr >> 4, *addr & 0xf); addr++; } return 0; } /* rmmod MODULE */ static grub_err_t grub_mini_cmd_rmmod (struct grub_command *cmd __attribute__ ((unused)), int argc, char *argv[]) { grub_dl_t mod; if (argc == 0) return grub_error (GRUB_ERR_BAD_ARGUMENT, "no module specified"); mod = grub_dl_get (argv[0]); if (! mod) return grub_error (GRUB_ERR_BAD_ARGUMENT, "no such module"); if (grub_dl_unref (mod) <= 0) grub_dl_unload (mod); return 0; } /* lsmod */ static grub_err_t grub_mini_cmd_lsmod (struct grub_command *cmd __attribute__ ((unused)), int argc __attribute__ ((unused)), char *argv[] __attribute__ ((unused))) { grub_dl_t mod; grub_printf_ (N_("Name\tRef Count\tDependencies\n")); FOR_DL_MODULES (mod) { grub_dl_dep_t dep; grub_printf ("%s\t%d\t\t", mod->name, mod->ref_count); for (dep = mod->dep; dep; dep = dep->next) { if (dep != mod->dep) grub_xputs (","); grub_printf ("%s", dep->mod->name); } grub_xputs ("\n"); } return 0; } /* exit */ static grub_err_t __attribute__ ((noreturn)) grub_mini_cmd_exit (struct grub_command *cmd __attribute__ ((unused)), int argc __attribute__ ((unused)), char *argv[] __attribute__ ((unused))) { grub_exit (); /* Not reached. */ } static grub_command_t cmd_cat, cmd_help; static grub_command_t cmd_dump, cmd_rmmod, cmd_lsmod, cmd_exit; GRUB_MOD_INIT(minicmd) { cmd_cat = grub_register_command ("cat", grub_mini_cmd_cat, N_("FILE"), N_("Show the contents of a file.")); cmd_help = grub_register_command ("help", grub_mini_cmd_help, 0, N_("Show this message.")); cmd_dump = grub_register_command ("dump", grub_mini_cmd_dump, N_("ADDR [SIZE]"), N_("Dump memory.")); cmd_rmmod = grub_register_command ("rmmod", grub_mini_cmd_rmmod, N_("MODULE"), N_("Remove a module.")); cmd_lsmod = grub_register_command ("lsmod", grub_mini_cmd_lsmod, 0, N_("Show loaded modules.")); cmd_exit = grub_register_command ("exit", grub_mini_cmd_exit, 0, N_("Exit from GRUB.")); } GRUB_MOD_FINI(minicmd) { grub_unregister_command (cmd_cat); grub_unregister_command (cmd_help); grub_unregister_command (cmd_dump); grub_unregister_command (cmd_rmmod); grub_unregister_command (cmd_lsmod); grub_unregister_command (cmd_exit); }