initial commit

README.md

@@ -0,0 +1 @@
+# myshell

myshell.c

@@ -0,0 +1,205 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <unistd.h>
+#include <grp.h>
+#include <pwd.h>
+#include <string.h>
+#include <time.h>
+
+void help(){
+  printf("Krystian Janowicz \n Dostepne polecenia: \n echo [arg] \n pwd \n help \n exit \n ls \n" );
+}
+
+void pwd(){
+  char *path;
+  path = getenv("PWD");
+  printf(" %s",path);
+  printf("\n");
+}
+
+void prompt(){
+  char *user;
+  char *path;
+  char hostname[150];
+
+  user = getenv( "USER" );
+  path = getenv("PWD");
+
+  memset(hostname, 0, 150);
+  gethostname(hostname, 150);
+
+  printf(user);
+  printf("@");
+  printf(hostname, "@");
+  printf(" %s",path);
+  printf(" $ ");
+  }
+
+void echo(char komenda[1024]){
+  char *sprawdzczy = " ";
+  int dlugosc=strlen(komenda);
+  for(int i=0;i<=dlugosc-1; i++){
+
+    char temp;
+    temp=komenda[i];
+
+    if(temp==' '){
+        char *reszta = strpbrk(komenda, sprawdzczy);
+        printf("%s\n", reszta);
+      }
+  }
+}
+
+int exxit(char komenda[1024]){
+char *sprawdzczy = " ";
+int dlugosc=strlen(komenda);
+for(int i=0;i<=dlugosc-1; i++)
+{
+
+char temp;
+temp=komenda[i];
+char *sprawdzczy = " ";
+if(temp==' '){
+
+char *reszta = strpbrk(komenda, sprawdzczy);
+int dlugoscReszty=strlen(reszta)-1;
+printf("%d\n", dlugoscReszty);
+int zwrocik=reszta[1];
+return zwrocik-48; // -48 bo ASCII, nie wiedzialem jak to przekonwertowac "normalnie"
+}
+
+}
+return 0;
+
+}
+char *getUname(int uid) {
+  struct passwd *user;
+  user = getpwuid(uid);
+
+  return user->pw_name;
+};
+
+char *getGname(int gid) {
+  struct group *grp;
+  grp = getgrgid(gid);
+
+  return grp->gr_name;
+};
+
+void getDate(const time_t time, char *date) {
+  struct tm *_date;
+  _date = localtime(&time);
+
+  strftime(date, 255, "%b %d %R", _date);
+};
+
+void getRights(int inode, char *rights) {
+  static char *RIGHTS[8] = {"---", "--x", "-w-", "-wx",
+                            "r--", "r-x", "rw-", "rwx"};
+
+  static char FILE_TYPE[7] = {'-', 'd', 'c', 'b', 's', 'p', 'l'};
+
+  int mask[4];
+  int i;
+  for (i = 3; i > 0; i--) {
+    mask[i] = inode % 010;
+    inode /= 010;
+  }
+
+  switch (inode) {
+    case 0140:
+      mask[0] = 4;
+      break;
+    case 0120:
+      mask[0] = 6;
+      break;
+    case 0100:
+      mask[0] = 0;
+      break;
+    case 060:
+      mask[0] = 3;
+      break;
+    case 040:
+      mask[0] = 1;
+      break;
+    case 020:
+      mask[0] = 2;
+      break;
+    case 010:
+      mask[0] = 5;
+      break;
+    default:
+      mask[0] = 0;
+      break;
+  }
+
+  sprintf(rights, "%c%s%s%s", FILE_TYPE[mask[0]], RIGHTS[mask[1]],
+          RIGHTS[mask[2]], RIGHTS[mask[3]]);
+};
+
+void list_dir(char *name) {
+  DIR *dir;
+  struct dirent *dp;
+  struct stat statbuf;
+  char date[255];
+  char rights[10] = {};
+
+  printf("%s\n", name);
+
+  if ((dir = opendir(name)) == NULL) {
+    perror("Blad");
+  }
+  while ((dp = readdir(dir)) != NULL) {
+    if (stat(dp->d_name, &statbuf) == -1) continue;
+	if (dp->d_name[0] == '.') continue;
+    getDate(statbuf.st_mtime, date);
+    getRights(statbuf.st_mode, rights);
+    printf("%s %lu %s %s %ld %s %s\n",  rights,
+               statbuf.st_nlink,
+           getUname(statbuf.st_uid), getGname(statbuf.st_gid), statbuf.st_size,
+           date, dp->d_name);
+  }
+  closedir(dir);
+}
+
+int main(int argc, char **argv) {
+
+
+
+  char komenda[1024];
+
+  do{
+        prompt();
+        gets(komenda);
+
+      if (strcmp(komenda, "help") == 0){
+          help();
+        }
+        else if (strcmp(komenda, "version") == 0){
+          version() ;
+        }
+        else if (strcmp(komenda, "ls") == 0){
+          chdir(*(++argv));
+          list_dir(".");
+        }
+        else if (strcmp(komenda, "pwd") == 0){
+          pwd() ;
+        }
+        else if ((komenda[0]=='e') && (komenda[1]=='c') && (komenda[2]=='h') && (komenda[3]=='o')){
+
+          echo(komenda);
+        }
+        else if ((komenda[0]=='e') && (komenda[1]=='x') && (komenda[2]=='i') && (komenda[3]=='t')){
+          int zwrot=exxit(komenda);
+          return zwrot;
+        }
+        else{
+        printf ("nie znaleziono polecenia. uzyj: help \n" ) ;
+        }
+
+  }while(1);
+
+}