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/*
* UNG's Not GNU
*
* Copyright (c) 2011-2017, Jakob Kaivo <jkk@ung.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "sh.h"
#include <stddef.h>
#include <string.h>
#include <libgen.h>
#include <unistd.h>
struct builtin {
const char *name;
int (*main)(int argc, char *argv[]);
};
/* Special built-ins */
/* break */
/* : */
/* continue */
int dot_main(int argc, char *argv[]);
int eval_main(int argc, char *argv[]);
int exec_main(int argc, char *argv[]);
int exit_main(int argc, char *argv[]);
int export_main(int argc, char *argv[]);
int readonly_main(int argc, char *argv[]);
/* return */
int set_main(int argc, char *argv[]);
int shift_main(int argc, char *argv[]);
int times_main(int argc, char *argv[]);
int trap_main(int argc, char *argv[]);
int unset_main(int argc, char *argv[]);
static struct builtin special_builtins[] = {
{ "break", NULL },
{ ":", NULL },
{ "continue", NULL },
{ ".", dot_main },
{ "eval", eval_main },
{ "exec", exec_main },
{ "exit", exit_main },
{ "export", export_main },
{ "readonly", readonly_main },
{ "return", NULL },
{ "set", set_main },
{ "shift", shift_main },
{ "times", times_main },
{ "trap", trap_main },
{ "unset", unset_main },
{ 0, 0 },
};
/* Regular built-ins */
int alias_main(int argc, char *argv[]);
int bg_main(int argc, char *argv[]);
int cd_main(int argc, char *argv[]);
int command_main(int argc, char *argv[]);
int false_main(int argc, char *argv[]);
int fc_main(int argc, char *argv[]);
int fg_main(int argc, char *argv[]);
int getopts_main(int argc, char *argv[]);
int jobs_main(int argc, char *argv[]);
int kill_main(int argc, char *argv[]);
int newgrp_main(int argc, char *argv[]);
int pwd_main(int argc, char *argv[]);
int read_main(int argc, char *argv[]);
int true_main(int argc, char *argv[]);
int ulimit_main(int argc, char *argv[]);
int umask_main(int argc, char *argv[]);
int unalias_main(int argc, char *argv[]);
int wait_main(int argc, char *argv[]);
static struct builtin regular_builtins[] = {
{ "alias", alias_main },
{ "bg", bg_main },
{ "cd", cd_main },
{ "command", command_main },
{ "false", false_main },
{ "fc", fc_main },
{ "fg", fg_main },
{ "getopts", getopts_main },
{ "jobs", jobs_main },
{ "kill", kill_main },
{ "newgrp", newgrp_main },
{ "pwd", pwd_main },
{ "read", read_main },
{ "true", true_main },
{ "ulimit", ulimit_main },
{ "umask", umask_main },
{ "unalias", unalias_main },
{ "wait", wait_main },
{ 0, 0 },
};
static int (*sh_getbuiltin(const char *util, struct builtin *bi))(int argc, char *argv[])
{
for (int i = 0; bi[i].name; i++) {
if (!strcmp(bi[i].name, util)) {
return bi[i].main;
}
}
return NULL;
}
int sh_builtin(int argc, char *argv[])
{
char *util = basename(argv[0]);
if (!strcmp(util, "break")) {
return BREAK;
} else if (!strcmp(util, ":")) {
return 0;
} else if (!strcmp(util, "continue")) {
return CONTINUE;
} else if (!strcmp(util, "return")) {
return RETURN;
}
int (*m)(int, char *[]) = sh_getbuiltin(util, special_builtins);
if (m == NULL) {
m = sh_getbuiltin(util, regular_builtins);
if (m == NULL) {
return 1;
}
}
optind = 1;
opterr = 1;
optarg = NULL;
return m(argc, argv);
}
static int is_builtin(const char *util, struct builtin *bi)
{
for (int i = 0; bi[i].name; i++) {
if (!strcmp(bi[i].name, util)) {
return 1;
}
}
return 0;
}
int sh_is_special_builtin(const char *util)
{
return is_builtin(util, special_builtins);
}
int sh_is_regular_builtin(const char *util)
{
return is_builtin(util, regular_builtins);
}
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