117 lines
2.6 KiB
C
117 lines
2.6 KiB
C
#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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#include <sys/wait.h>
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#include <sys/reboot.h>
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#include <sys/ioctl.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <stdbool.h>
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// #include "para.h"
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#include "builtin.h"
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void cmd_cd(char *path) {
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if (!path) path = "/";
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if (chdir(path) != 0) perror("cd");
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}
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void cmd_pwd() {
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char buf[1024];
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if(getcwd(buf, sizeof(buf))) printf("%s\n", buf);
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}
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void cmd_ls(char *path) {
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DIR *d = opendir(path ? path : ".");
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struct dirent *dir;
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if (d) {
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while ((dir = readdir(d)) != NULL) if(dir->d_name[0] != '.') printf("%s ", dir->d_name);
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printf("\n"); closedir(d);
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} else perror("ls");
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}
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// void cmd_cat(int argc, const char *argv[]) {
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// if (argc < 2) {
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// printf("Usage: cat <file1> [file2] ...\n");
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// return;
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// }
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// char buf[1024];
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// int n, fd;
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// for (int i = 1; i < argc; i++) {
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// fd = open(argv[i], O_RDONLY);
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// if (fd < 0) {
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// perror(argv[i]);
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// continue;
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// }
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// while ((n = read(fd, buf, sizeof(buf))) > 0) {
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// write(STDOUT_FILENO, buf, n);
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// }
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// close(fd);
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// }
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// }
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// void cmd_proc() {
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// const int argc = 2;
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// const char* args[] = {"cat", "/proc/cpuinfo", NULL};
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// cmd_cat(argc, args);
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// }
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// void cmd_echo(int argc, const char *argv[]) {
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// int start_index = 1;
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// int no_newline = 0;
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// if (argc > 1 && strcmp(argv[1], "-n") == 0) {
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// no_newline = 1;
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// start_index = 2;
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// }
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// for (int i = start_index; i < argc; i++) {
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// printf("%s", argv[i]);
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// if (i < argc - 1) {
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// printf(" ");
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// }
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// }
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// if (!no_newline) {
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// printf("\n");
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// }
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// fflush(stdout);
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// }
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void cmd_poweroff() { sync(); reboot(RB_POWER_OFF); }
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void cmd_reboot() { sync(); reboot(RB_AUTOBOOT); }
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void cmd_size() {
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struct winsize ws;
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if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == 0) {
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printf("Terminal Size: %d rows x %d cols\n", ws.ws_row, ws.ws_col);
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} else {
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perror("size: failed to get window size");
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}
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}
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void cmd_resize(char* row, char* col) {
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struct winsize ws;
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ws.ws_row = atoi(row);
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ws.ws_col = atoi(col);
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ws.ws_xpixel = 0;
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ws.ws_ypixel = 0;
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if (ioctl(STDOUT_FILENO, TIOCSWINSZ, &ws) == 0) {
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printf("Terminal resized to %d x %d\n", ws.ws_row, ws.ws_col);
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} else {
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perror("resize failed");
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}
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}
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void cmd_help() { printf("Built-ins: ls, cd, pwd, cat, sz, poweroff, reboot\n"); } |