Learning xv6

.vscode/c_cpp_properties.json

@@ -0,0 +1,21 @@
+{
+    "configurations": [
+        {
+            "name": "Win32",
+            "includePath": [
+                "${workspaceFolder}/**"
+            ],
+            "defines": [
+                "_DEBUG",
+                "UNICODE",
+                "_UNICODE"
+            ],
+            "windowsSdkVersion": "10.0.16299.0",
+            "compilerPath": "C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Tools/MSVC/14.29.30133/bin/Hostx64/x64/cl.exe",
+            "cStandard": "c17",
+            "cppStandard": "c++17",
+            "intelliSenseMode": "windows-msvc-x64"
+        }
+    ],
+    "version": 4
+}

Makefile

@@ -181,6 +181,8 @@ UPROGS=\
 	_usertests\
 	_wc\
 	_zombie\
+	_rm2\
+	_sh1\
 
 fs.img: mkfs README $(UPROGS)
 	./mkfs fs.img README $(UPROGS)
@@ -250,7 +252,7 @@ qemu-nox-gdb: fs.img xv6.img .gdbinit
 EXTRA=\
 	mkfs.c ulib.c user.h cat.c echo.c forktest.c grep.c kill.c\
 	ln.c ls.c mkdir.c rm.c stressfs.c usertests.c wc.c zombie.c\
-	printf.c umalloc.c\
+	printf.c umalloc.c rm2.c sh1.c\
 	README dot-bochsrc *.pl toc.* runoff runoff1 runoff.list\
 	.gdbinit.tmpl gdbutil\
 

rm2.c

@@ -0,0 +1,23 @@
+#include "types.h"
+#include "stat.h"
+#include "user.h"
+
+int
+main(int argc, char *argv[])
+{
+  int i;
+
+  if(argc < 2){
+    printf(2, "Usage: rm files...\n");
+    exit();
+  }
+
+  for(i = 1; i < argc; i++){
+    if(unlink(argv[i]) < 0){
+      printf(2, "rm: %s failed to delete\n", argv[i]);
+      break;
+    }
+  }
+
+  exit();
+}

sh.c

@@ -146,15 +146,27 @@ main(void)
 {
   static char buf[100];
   int fd;
-
+  // added this one
+  int fp;
+  int n=1;
+  n=n+1;
   // Ensure that three file descriptors are open.
   while((fd = open("console", O_RDWR)) >= 0){
     if(fd >= 3){
       close(fd);
       break;
     }
   }
-
+  //important to open
+  fp = open("commands",O_WRONLY|O_CREATE);
+  if (fp == 0) 
+    {
+        // Error opening the file
+        printf(2, "Error opening file");
+        return 1;
+    }
+    char command[256];
+  //printf(2,"Sucessfully opened!");
   // Read and run input commands.
   while(getcmd(buf, sizeof(buf)) >= 0){
     if(buf[0] == 'c' && buf[1] == 'd' && buf[2] == ' '){
@@ -165,9 +177,22 @@ main(void)
       continue;
     }
     if(fork1() == 0)
+    {
+      //To check if this is where process is going
+      //printf(1,"at least this is working ??\n");
+       strcpy(command,buf);
+      // Append the command to the file
+      write(fd, command, strlen(command));
+      //printf(2,"we are here", buf);
       runcmd(parsecmd(buf));
+
+
+    }
+
     wait();
   }
+  //close the file?
+  close(fp);
   exit();
 }