mirror of
https://gitlab.com/sortix/sortix.git
synced 2023-02-13 20:55:38 -05:00
Make command-not-found(1) data-driven.
Previously command-not-found(1) encoded all its suggestions in code. This changes it to use a data table to make it easier to understand and to modify with new suggestions.
This commit is contained in:
Juhani Krekelä
parent
c2088ae3ee
commit
d605911ddc
1 changed files with 111 additions and 75 deletions
|
|
@ -1,5 +1,6 @@
|
|||
/*
|
||||
* Copyright (c) 2013, 2015, 2016 Jonas 'Sortie' Termansen.
|
||||
* Copyright (c) 2021 Juhani 'nortti' Krekelä.
|
||||
*
|
||||
* Permission to use, copy, modify, and distribute this software for any
|
||||
* purpose with or without fee is hereby granted, provided that the above
|
||||
|
|
@ -14,9 +15,8 @@
|
|||
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||
*
|
||||
* command-not-found.c
|
||||
* Prints a notice that the attempted command wasn't found and possibly
|
||||
* suggests how to install the command or suggests the proper spelling in case
|
||||
* of a typo.
|
||||
* Writes a notice that the attempted command wasn't found and suggests
|
||||
* possible altetnatives.
|
||||
*/
|
||||
|
||||
#include <fcntl.h>
|
||||
|
|
@ -25,7 +25,9 @@
|
|||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
|
||||
const char* tty_name(void)
|
||||
#define ARRAY_LENGTH(array) (sizeof(array) / sizeof((array)[0]))
|
||||
|
||||
static const char* tty_name(void)
|
||||
{
|
||||
int tty_fd = open("/dev/tty", O_RDONLY);
|
||||
const char* result = NULL;
|
||||
|
|
@ -37,111 +39,145 @@ const char* tty_name(void)
|
|||
return result ? result : "/dev/tty";
|
||||
}
|
||||
|
||||
void suggest_editor(const char* filename)
|
||||
static void suggest_logout(void)
|
||||
{
|
||||
fprintf(stderr, "No command '%s' found, did you mean:\n", filename);
|
||||
if ( access("/bin/ed", X_OK) == 0 )
|
||||
fprintf(stderr, " Command 'ed' from package 'ed'\n");
|
||||
fprintf(stderr, " Command 'editor' from package 'editor'\n");
|
||||
if ( access("/bin/nano", X_OK) == 0 )
|
||||
fprintf(stderr, " Command 'nano' from package 'nano'\n");
|
||||
if ( access("/bin/vim", X_OK) == 0 )
|
||||
fprintf(stderr, " Command 'vim' from package 'vim'\n");
|
||||
}
|
||||
|
||||
void suggest_pager(const char* filename)
|
||||
{
|
||||
fprintf(stderr, "No command '%s' found, did you mean:\n", filename);
|
||||
fprintf(stderr, " Command 'pager' from package 'utils'\n");
|
||||
}
|
||||
|
||||
void suggest_extfs(const char* filename)
|
||||
{
|
||||
fprintf(stderr, "No command '%s' found, did you mean:\n", filename);
|
||||
fprintf(stderr, " Command 'extfs' from package 'ext'\n");
|
||||
}
|
||||
|
||||
void suggest_unmount(const char* filename)
|
||||
{
|
||||
fprintf(stderr, "No command '%s' found, did you mean:\n", filename);
|
||||
fprintf(stderr, " Command 'unmount' from package 'utils'\n");
|
||||
}
|
||||
|
||||
void suggest_logout(const char* filename)
|
||||
{
|
||||
fprintf(stderr, "No command '%s' found, did you mean:\n", filename);
|
||||
fprintf(stderr, " Exiting your shell normally to logout.\n");
|
||||
}
|
||||
|
||||
void suggest_poweroff(const char* filename)
|
||||
static void suggest_poweroff(void)
|
||||
{
|
||||
fprintf(stderr, "No command '%s' found, did you mean:\n", filename);
|
||||
if ( strcmp(tty_name(), "/dev/tty1") != 0 )
|
||||
{
|
||||
fprintf(stderr, " Powering off on /dev/tty1.\n");
|
||||
}
|
||||
else if ( getenv("LOGIN_PID") )
|
||||
{
|
||||
fprintf(stderr, " Exiting your shell normally to logout.\n");
|
||||
fprintf(stderr, " Login as user 'poweroff' to power off computer.\n");
|
||||
}
|
||||
else
|
||||
{
|
||||
fprintf(stderr, " Exiting your shell normally to poweroff.\n");
|
||||
}
|
||||
}
|
||||
|
||||
void suggest_reboot(const char* filename)
|
||||
static void suggest_reboot(void)
|
||||
{
|
||||
fprintf(stderr, "No command '%s' found, did you mean:\n", filename);
|
||||
if ( strcmp(tty_name(), "/dev/tty1") != 0 )
|
||||
{
|
||||
fprintf(stderr, " Rebooting on /dev/tty1.\n");
|
||||
}
|
||||
else if ( getenv("LOGIN_PID") )
|
||||
{
|
||||
fprintf(stderr, " Exiting your shell normally to logout.\n");
|
||||
fprintf(stderr, " Login as user 'reboot' to reboot computer.\n");
|
||||
}
|
||||
else
|
||||
{
|
||||
fprintf(stderr, " Exiting your shell with 'exit 1' to reboot.\n");
|
||||
}
|
||||
}
|
||||
|
||||
void suggest_rw(const char* filename)
|
||||
enum category
|
||||
{
|
||||
fprintf(stderr, "No command '%s' found, did you mean:\n", filename);
|
||||
fprintf(stderr, " Command 'rw' from package 'rw'\n");
|
||||
NONE,
|
||||
BROWSER,
|
||||
EDITOR,
|
||||
LOGOUT,
|
||||
MOUNT,
|
||||
PAGER,
|
||||
POWEROFF,
|
||||
REBOOT,
|
||||
RW,
|
||||
SHELL,
|
||||
UNMOUNT,
|
||||
};
|
||||
|
||||
struct command
|
||||
{
|
||||
enum category category;
|
||||
const char* command;
|
||||
const char* package;
|
||||
void (*suggest)(void);
|
||||
};
|
||||
|
||||
struct command commands[] =
|
||||
{
|
||||
{BROWSER, "chromium", NULL, NULL},
|
||||
{BROWSER, "chromium-browser", NULL, NULL},
|
||||
{BROWSER, "elinks", NULL, NULL},
|
||||
{BROWSER, "firefox", NULL, NULL},
|
||||
{BROWSER, "links", "links", NULL},
|
||||
{BROWSER, "lynx", NULL, NULL},
|
||||
{BROWSER, "w3m", NULL, NULL},
|
||||
{BROWSER, "www-browser", NULL, NULL},
|
||||
{BROWSER, "x-www-browser", NULL, NULL},
|
||||
|
||||
{EDITOR, "ed", "ed", NULL},
|
||||
{EDITOR, "editor", "system", NULL},
|
||||
{EDITOR, "emacs", "emacs", NULL},
|
||||
{EDITOR, "nano", "nano", NULL},
|
||||
{EDITOR, "vim", "vim", NULL},
|
||||
{EDITOR, "vi", NULL, NULL},
|
||||
|
||||
{LOGOUT, "logoff", NULL, NULL},
|
||||
{LOGOUT, "logout", NULL, suggest_logout},
|
||||
|
||||
{MOUNT, "extfs", "system", NULL},
|
||||
{MOUNT, "mount", NULL, NULL},
|
||||
|
||||
{PAGER, "less", NULL, NULL},
|
||||
{PAGER, "more", NULL, NULL},
|
||||
{PAGER, "pager", "system", NULL},
|
||||
|
||||
{POWEROFF, "halt", NULL, NULL},
|
||||
{POWEROFF, "poweroff", NULL, suggest_poweroff},
|
||||
{POWEROFF, "shutdown", NULL, NULL},
|
||||
|
||||
{REBOOT, "reboot", NULL, suggest_reboot},
|
||||
|
||||
{RW, "dd", NULL, NULL},
|
||||
{RW, "rw", "system", NULL},
|
||||
|
||||
{SHELL, "bash", NULL, NULL},
|
||||
{SHELL, "dash", "dash", NULL},
|
||||
{SHELL, "ksh", NULL, NULL},
|
||||
{SHELL, "sh", "system", NULL},
|
||||
{SHELL, "zsh", NULL, NULL},
|
||||
|
||||
{UNMOUNT, "umount", NULL, NULL},
|
||||
{UNMOUNT, "unmount", "system", NULL},
|
||||
};
|
||||
|
||||
static enum category find_category(const char* filename)
|
||||
{
|
||||
for ( size_t i = 0; i < ARRAY_LENGTH(commands); i++ )
|
||||
{
|
||||
if ( commands[i].command && !strcmp(filename, commands[i].command) )
|
||||
return commands[i].category;
|
||||
}
|
||||
return NONE;
|
||||
}
|
||||
|
||||
int main(int argc, char* argv[])
|
||||
{
|
||||
const char* filename = 2 <= argc ? argv[1] : argv[0];
|
||||
if ( !strcmp(filename, "ed") ||
|
||||
!strcmp(filename, "emacs") ||
|
||||
!strcmp(filename, "nano") ||
|
||||
!strcmp(filename, "vi") ||
|
||||
!strcmp(filename, "vim") )
|
||||
suggest_editor(filename);
|
||||
else if ( !strcmp(filename, "less") ||
|
||||
!strcmp(filename, "more") )
|
||||
suggest_pager(filename);
|
||||
else if ( !strcmp(filename, "mount") )
|
||||
suggest_extfs(filename);
|
||||
else if ( !strcmp(filename, "umount") )
|
||||
suggest_unmount(filename);
|
||||
else if ( !strcmp(filename, "logout") ||
|
||||
!strcmp(filename, "logoff") )
|
||||
suggest_logout(filename);
|
||||
else if ( !strcmp(filename, "poweroff") ||
|
||||
!strcmp(filename, "halt") ||
|
||||
!strcmp(filename, "shutdown") )
|
||||
suggest_poweroff(filename);
|
||||
else if ( !strcmp(filename, "reboot") )
|
||||
suggest_reboot(filename);
|
||||
else if ( !strcmp(filename, "dd") )
|
||||
suggest_rw(filename);
|
||||
|
||||
enum category category = find_category(filename);
|
||||
if ( category != NONE )
|
||||
{
|
||||
fprintf(stderr, "No command '%s' found, did you mean:\n", filename);
|
||||
|
||||
for ( size_t i = 0; i < ARRAY_LENGTH(commands); i++ )
|
||||
{
|
||||
if ( !commands[i].package && !commands[i].suggest )
|
||||
continue;
|
||||
else if ( commands[i].category == category )
|
||||
{
|
||||
if ( commands[i].suggest )
|
||||
commands[i].suggest();
|
||||
else if ( !strcmp(commands[i].package, "system") )
|
||||
fprintf(stderr, " Command '%s' from the base system\n",
|
||||
commands[i].command);
|
||||
else
|
||||
fprintf(stderr, " Command '%s' from the package '%s'\n",
|
||||
commands[i].command, commands[i].package);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fprintf(stderr, "%s: command not found\n", filename);
|
||||
return 127;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue