109 lines
2.4 KiB
C
109 lines
2.4 KiB
C
/*
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* @Author: 1ridic
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* @Date: 2022-09-18 14:16:19
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* @Last Modified by: 1ridic
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* @Last Modified time: 2022-09-18 23:32:50
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*/
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#include "builtin.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <strings.h>
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#include <sys/types.h>
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#include <unistd.h>
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int dish_cd(char **args);
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int dish_help(char **args);
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int dish_exit(char **args);
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int dish_clear(char **args);
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int dish_setenv(char **args);
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int dish_getenv(char **args);
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int dish_unsetenv(char **args);
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int dish_echo(char **args);
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int dish_laststatus(char **args);
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char *builtin_cmd[] = {"cd", "help", "exit", "clear", "setenv",
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"getenv", "unsetenv", "echo", "laststatus", defined_builtin};
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int (*builtin_func[])(char **) = {
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&dish_cd, &dish_help, &dish_exit, &dish_clear, &dish_setenv,
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&dish_getenv, &dish_unsetenv, &dish_echo, &dish_laststatus, defined_builtin_func};
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int getBuiltinNum() { return sizeof(builtin_cmd) / sizeof(char *); }
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int dish_cd(char **args) {
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if (args[1] == NULL) {
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fprintf(stderr, "dish: expected argument to \"cd\"\n");
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} else {
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if (chdir(args[1]) != 0) {
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perror("dish");
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}
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}
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return 0;
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}
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int dish_help(char **args) {
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fprintf(stdout, \
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"Yet another Shell with C.\n\
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CopyRight (C) 2022-2033 1ridic\n\
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Compiled on %s\n\
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Compiler version %s\n\
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Enabled features:\
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", \
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__TIMESTAMP__, __VERSION__);
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#ifdef DEBUG
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fprintf(stdout, "DEBUG ");
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#endif
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#ifdef POSTGRES
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fprintf(stdout, "POSTGRES ");
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#endif
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fprintf(stdout, "\n");
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return 0;
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}
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int dish_exit(char **args) { exit(EXIT_SUCCESS); }
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int dish_clear(char **args) {
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fprintf(stdout, "\033[H\033[J");
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return 0;
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}
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int dish_setenv(char **args) {
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if (args[1] == NULL || args[2] == NULL) {
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fprintf(stderr, "dish: expected 2 arguments to \"setenv\"\n");
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return 1;
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}
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setenv(args[1], args[2], 1);
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return 0;
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}
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int dish_getenv(char **args) {
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fprintf(stdout, "%s\n", getenv(args[1]));
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return 0;
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}
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int dish_unsetenv(char **args) {
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long i = 1;
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while (args[i] != NULL) {
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unsetenv(args[i]);
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i++;
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}
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return 0;
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}
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int dish_echo(char **args) {
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if (args[1][0] == '$') {
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char *env = getenv(args[1] + sizeof(char));
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if (env != NULL)
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fprintf(stdout, "%s\n", env);
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} else
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fprintf(stdout, "%s\n", args[1]);
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return 0;
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}
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int dish_laststatus(char **args) {
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extern int status;
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fprintf(stdout, "%d\n", status);
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return 0;
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} |