Vance Leon - Unicorns

README.md

@@ -13,6 +13,11 @@ type `make` in the `examples/` directory.) It should print `Testing: PASS`.
 
 Name at least three things that an operating system is responsible for handling?
 
+1. Keeps track of all the running processes on the machine 
+2. Determines what and when processes are executed through scheduling.
+3. establish a User interface for the user to communicate with the machine
+
+
 ## Challenge 2
 
 Write a program in C, `lsls.c`, that prints out a directory listing for the
@@ -44,6 +49,8 @@ Downloads
 src
 ```
 
+
+
 **Hint**: Start by just printing out the contents of the current directory `.`,
 and then add the command line parsing later after you have it working.
 
@@ -73,10 +80,14 @@ the declarations for `DIR`, `struct dirent`, `opendir()`, `readdir()`, and
   _You should check for errors. If there is one, print an error message and exit
   (using the `exit()` function)._
 
+
+
 * `struct dirent *readdir(DIR *d)`: Reads the next directory entry from the
   `DIR*` returned by `opendir()`. Returns the result as a pointer to a `struct
   dirent` (see below). Returns `NULL` if there are no more directory entires.
 
+
+
 * `closedir(DIR *d)`: Close a directory (opened previously with `opendir()`)
   when you're done with it.
 

lsls/lsls-old.c

@@ -0,0 +1,100 @@
+
+//   while (printf(">   "), fgets(commandLine, sizeof commandLine, stdin) != NULL) {
+
+
+//       if((dir = opendir(".")) == NULL) {
+//         perror("Cannot open");
+//         exit(1);
+//       }
+//       while ((dp = readdir(dir)) != NULL) {
+//         if( errno != 0) {
+//           perror("Error reading directory");
+//         }else{
+//           (void)
+//         }
+//       }
+
+
+//     //   int pid = fork();
+//     //   if (pid < 0 ) {
+//     //     fprintf(stderr, "Fork Failed \n");
+//     //     exit(1);
+//     //   } else if (pid == 0) {
+//     //     execvp(exec_commands[0], exec_commands);
+//     //     perror("exec");
+//     //     exit(1);
+//     //   } else {
+//     //     wait(NULL);
+//     //     // printf("Parent Process");
+
+//     //   }
+
+
+
+
+
+//     }
+
+
+//   return 0;
+// }
+
+
+
+// int main(int argc, char **argv)
+// {
+//   // char path = ;
+//     int d = opendir("/mnt/c/Users/VLeon/Documents/Code");
+//     printf("d: %s", d);
+//     while(d != "\0" || NULL ){
+//       printf("while loop d: %s", d);
+//       readdir(d);
+
+//     };
+
+//   // if ((dir = opendir(".")) == NULL) {
+//   //   perror("Cannot open .");
+//   //   exit(1);
+//   // }
+
+//   // while ((dp = readdir(dir)) != NULL) {
+
+//   // }
+
+
+//   return 0;
+// }
+
+
+
+
+// int main(int argc, char **argv)
+// {
+//   char commandLine[9892];
+
+
+//   if (pipe(p) < 0) {
+//     fprintf(stderr, "fork failed\n");
+//     exit(1);
+
+
+//   int pid = fork();
+//   }else if (pid == 0) {
+//     // open
+
+//     // read and print
+
+
+
+//     // printf("Child Process");
+//   }else {
+//     wait(NULL);
+//     // printf("Parent Process");
+
+//   }
+
+//   return 0;
+// }
+
+
+

lsls/lsls.c

@@ -1,18 +1,66 @@
 #include <stdio.h>
 #include <dirent.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/wait.h>
+
+// #define MAX_CMD_LEN 9824
+// #define MAX_CMD_ARGS 128
 
 /**
  * Main
  */
-int main(int argc, char **argv)
-{
+  // steps
   // Parse command line
-
+  
   // Open directory
-
+  
   // Repeatly read and print entries
 
   // Close directory
 
+
+
+int main(int argc, char **argv)
+// int main(void)
+{
+  char *dirname;
+  // char commandLine[MAX_CMD_LEN];
+
+  if (argc == 1){
+    dirname = ".";
+  }else if (argc == 2) {
+    dirname = argv[1];
+  }else{
+    fprintf(stderr, "error: lsls [dirname]\n");
+    return 1;
+  }
+
+
+  // while (printf("> ", fgets(commandLine, sizeof commandLine, stdin)) != NULL){
+
+    DIR *d = opendir(dirname);
+
+    if (d == NULL ) {
+      perror("lsls");
+      return 1;
+    }
+
+    struct dirent *de;
+    char fullpath[9812];
+
+
+    while((de = readdir(d)) != NULL ){
+      sprintf(fullpath, "%s/%s", dirname, de->d_name);
+      printf("%s\n", de->d_name);
+    }
+
+    int closedir(DIR *de);
+
+  // }
   return 0;
-}
+
+
+}