132 lines
2.4 KiB
C
132 lines
2.4 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <dirent.h>
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#include <errno.h>
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#include <pwd.h>
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const int max = 1000;
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int cut(char **argv, char *command){
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int i = 0, w = 0, x = 0;
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char argument[100];
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while (1){
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if(command[i] == 10){
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argv[w] = NULL;
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break;
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}
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else if (command[i] == 32){
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i+=1;
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x=0;
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continue;
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}
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else{
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while(command[i] != 32 && command[i]!=10){
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argument[x]=command[i];
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x+=1;
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i+=1;
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}
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argument[x] = '\0';
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argv[w]=malloc(x+1 * sizeof(char));
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strcpy(argv[w], argument);
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w+=1;
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}
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}
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return w+1;
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}
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void cd (char **argv){
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if(argv[1] == NULL){
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printf("Add arguments\n");
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return;
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}
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else if(argv[2] != NULL){
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printf("Too many arguments\n");
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return;
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}
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else{
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if (chdir(argv[1]) != 0)
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perror("chdir error");
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return;
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}
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}
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void spathf (char **argv, int *spath){
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int l;
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if (argv[1] == NULL){
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printf("Add arguments\n");
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return;
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}
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else if (argv[2] != NULL){
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printf("Too many arguments\n");
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return;
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}
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else if (!strcmp(argv[1], "help")){
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printf("Arguments:\n0 turns off path showing\n1 turns on path showing\n");
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return;
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}
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l = argv[1][0] - '0';
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if (argv[1][1] != 0 || l < 0 || l > 1){
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printf("Wrong number\n");
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return;
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}
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else
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*spath = l;
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}
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int main (){
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int ile, i, spath = 1;
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while (1){
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char* argv[100];
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char komenda[max], directory[max];
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if (getcwd(directory, sizeof(directory)) == NULL){
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perror("getcwd() error");
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return -1;
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}
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struct passwd *p = getpwuid(getuid());
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/*dodac obsluge bledow do get?*/
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if (spath)
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printf("[%s]", directory);
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printf("%s$ ", p->pw_name); /* mozna zrobic (*p).pw_name */
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fgets(komenda, max, stdin);
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ile = cut(argv, komenda);
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if (argv[0]==NULL)
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continue;
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else if (!strcmp(argv[0], "spath")){
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spathf(argv, &spath);
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continue;
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}
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else if (!strcmp(argv[0], "cd")){
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cd(argv);
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continue;
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}
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else if (!strcmp(argv[0], "help")){
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if (fork() == 0){
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execlp("cat", "cat", "help", NULL);
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perror("execlp");
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exit(EXIT_FAILURE);
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}
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else
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wait(NULL);
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}
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else if (!strcmp(argv[0], "exit"))
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break;
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else
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if (fork() == 0){
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execvp(argv[0], argv);
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perror("execvp");
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exit(EXIT_FAILURE);
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}
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else
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wait(NULL);
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for(i=0; i<ile; i++)
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free(argv[i]);
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}
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return 0;
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}
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