82 lines
2.0 KiB
Plaintext
82 lines
2.0 KiB
Plaintext
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <unistd.h>
|
|
|
|
#define MAXARGS 256
|
|
|
|
int main()
|
|
{
|
|
char* usrinput = NULL;
|
|
int n = 0;
|
|
while (1)
|
|
{
|
|
|
|
char pwd[100];
|
|
getcwd(pwd,100);
|
|
|
|
printf("[%s] &",pwd);
|
|
|
|
char readcomm = getline(&usrinput, &n, stdin);
|
|
|
|
if (usrinput[readcomm-1] == '\n')
|
|
{
|
|
usrinput[readcomm-1] = 0;
|
|
}
|
|
|
|
char* command[MAXARGS + 1] = {strtok(usrinput, " "), 0 };
|
|
char* ptr;
|
|
int i = 1;
|
|
while (ptr = strtok(NULL, " "))
|
|
{
|
|
command[i] = ptr;
|
|
i++;
|
|
}
|
|
if (strcmp(command[0], "exit")==0)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
if (strcmp(command[0], "help")==0)
|
|
{
|
|
printf("\n========================================\n= Arkadiusz Charliński =\n");
|
|
printf("= własna implemantacja: exit, help, cd =\n========================================\n\n");
|
|
continue;
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
if (strcmp(command[0],"cd") == 0)
|
|
{
|
|
if (command[1]==NULL)
|
|
{
|
|
chdir(getenv("HOME"));
|
|
continue;
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
else
|
|
{
|
|
chdir(command[1]);
|
|
continue;
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
int pid = fork();
|
|
|
|
if (pid==0 && strcmp(command[0],"help") !=0 && strcmp(command[0],"cd") !=0 && strcmp(command[0],"exit") !=0)
|
|
{
|
|
execvp(command[0], command);
|
|
perror(command[0]);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
else
|
|
{
|
|
waitpid(pid, NULL, 0);
|
|
}
|
|
|
|
}
|
|
return 0;
|
|
} |