145 lines
3.7 KiB
C
145 lines
3.7 KiB
C
/*
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* Copyright (c) 2013, 2015, 2016, 2021 Jonas 'Sortie' Termansen.
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* Copyright (c) 2021 Juhani 'nortti' Krekelä.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* command-not-found.c
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* Writes a notice that the attempted command wasn't found and suggests
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* possible altetnatives.
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*/
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#define ARRAY_LENGTH(array) (sizeof(array) / sizeof((array)[0]))
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static void suggest_logout(void)
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{
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if ( getenv("DISPLAY_SOCKET") )
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fprintf(stderr, " Pressing Ctrl-Alt-Del to exit desktop.\n");
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else
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fprintf(stderr, " Exiting your shell normally to logout.\n");
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}
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enum category
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{
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NONE,
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BROWSER,
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EDITOR,
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LOGOUT,
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MOUNT,
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PAGER,
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POWEROFF,
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RW,
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SHELL,
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UNMOUNT,
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};
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struct command
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{
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enum category category;
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const char* command;
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const char* package;
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void (*suggest)(void);
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};
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struct command commands[] =
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{
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{BROWSER, "chromium", NULL, NULL},
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{BROWSER, "chromium-browser", NULL, NULL},
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{BROWSER, "elinks", NULL, NULL},
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{BROWSER, "firefox", NULL, NULL},
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{BROWSER, "links", "links", NULL},
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{BROWSER, "lynx", NULL, NULL},
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{BROWSER, "w3m", NULL, NULL},
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{BROWSER, "www-browser", NULL, NULL},
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{BROWSER, "x-www-browser", NULL, NULL},
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{EDITOR, "ed", "ed", NULL},
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{EDITOR, "editor", "system", NULL},
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{EDITOR, "emacs", "emacs", NULL},
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{EDITOR, "nano", "nano", NULL},
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{EDITOR, "vim", "vim", NULL},
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{EDITOR, "vi", NULL, NULL},
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{LOGOUT, "logoff", NULL, NULL},
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{LOGOUT, "logout", NULL, suggest_logout},
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{MOUNT, "extfs", "system", NULL},
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{MOUNT, "mount", NULL, NULL},
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{PAGER, "less", NULL, NULL},
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{PAGER, "more", NULL, NULL},
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{PAGER, "pager", "system", NULL},
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{POWEROFF, "poweroff", "system", NULL},
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{POWEROFF, "shutdown", NULL, NULL},
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{RW, "dd", NULL, NULL},
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{RW, "rw", "system", NULL},
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{SHELL, "bash", NULL, NULL},
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{SHELL, "dash", "dash", NULL},
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{SHELL, "ksh", NULL, NULL},
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{SHELL, "sh", "system", NULL},
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{SHELL, "zsh", NULL, NULL},
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{UNMOUNT, "umount", NULL, NULL},
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{UNMOUNT, "unmount", "system", NULL},
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};
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static enum category find_category(const char* filename)
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{
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for ( size_t i = 0; i < ARRAY_LENGTH(commands); i++ )
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{
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if ( commands[i].command && !strcmp(filename, commands[i].command) )
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return commands[i].category;
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}
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return NONE;
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}
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int main(int argc, char* argv[])
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{
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const char* filename = 2 <= argc ? argv[1] : argv[0];
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enum category category = find_category(filename);
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if ( category != NONE )
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{
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fprintf(stderr, "No command '%s' found, did you mean:\n", filename);
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for ( size_t i = 0; i < ARRAY_LENGTH(commands); i++ )
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{
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if ( !commands[i].package && !commands[i].suggest )
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continue;
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else if ( commands[i].category == category )
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{
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if ( commands[i].suggest )
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commands[i].suggest();
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else if ( !strcmp(commands[i].package, "system") )
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fprintf(stderr, " Command '%s' from the base system\n",
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commands[i].command);
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else
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fprintf(stderr, " Command '%s' from the package '%s'\n",
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commands[i].command, commands[i].package);
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}
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}
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}
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fprintf(stderr, "%s: command not found\n", filename);
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return 127;
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}
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