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