Zaktualizuj 'microshell/microshell.c'

microshell/microshell.c

@@ -0,0 +1,87 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <pwd.h>
+#include <string.h>
+#include <wait.h>
+
+#define space " \n"
+#define max_c 500
+
+int help() {
+    printf ("microshell v1.0. © 2018 Krystian Rzepa\n");
+    printf("Obslugiwane polecenia:\n\
+    help - pomoc\n\
+    exit - wyjscie\n\
+    cd - zmiana aktualnego katalogu\n\
+    pwd - wyswietla aktualny katalog\n\
+    obsluga programow z parametrami\n");
+}
+
+
+const char *getUserName()
+{
+  uid_t uid = geteuid();
+  struct passwd *pw = getpwuid(uid);
+
+  return pw->pw_name;
+}
+
+
+int main()
+{
+    char cwd[1000], hostName[100], *pwd[1000];
+    register struct passwd *pw;
+    register uid_t uid;
+    uid = geteuid ();
+    pw = getpwuid (uid);
+
+    char line[max_c], lend[max_c], * commands[max_c], ** command;
+
+    while (1) {
+    gethostname(hostName, 99);
+    getcwd(cwd, 999);
+
+    printf("%s@%s %s $ ", pw->pw_name, hostName, cwd);
+
+    fflush(stdout);
+    if (fgets(line, max_c, stdin )) {
+
+        command = commands;
+        *command++ = strtok(line,space);
+        while ((*command++ = strtok(NULL,space)));
+
+
+    if (strcmp(commands[0], "help")==0) help();
+
+    else if (strcmp(commands[0], "exit")==0) {
+        if (commands[1]==0) exit(0);
+        else exit(atoi(commands[1]));
+    }
+
+    else if (strcmp(commands[0], "cd")==0) {
+        if (commands[1]==0) printf("Wymagany argument\n");
+        int ret;
+        ret = chdir(commands[1]);
+        strcpy(lend, "pwd");
+    }
+
+    else if (strcmp(commands[0], "pwd")==0) printf ("%s\n", cwd);
+
+    else {
+        pid_t  x;
+        x = fork();
+
+        if (x==0) {
+        if (commands[1] == 0) execlp(commands[0], commands[0], (char *)NULL);
+        else execlp(commands[0], commands[0], commands[1], (char *)NULL);
+        printf("Nie ma takiego polecenia. Wpisz help aby wyswietlic dostepne polecenia.\n");
+        }
+        else  waitpid(x, NULL, 0);
+
+    }
+    }
+    }
+
+    return 0;
+}