[Add] README and some pinfo fixes

README.md

@@ -1,3 +1,64 @@
 # gSH
 
 A basic C shell
+
+## Project Structure
+
+The project contains the following folder with files described:
+
+-   **build**: stores the build files
+-   **include**: stores all header files
+-   **src**: stores `.c` source code files
+
+## Instructions
+
+-   ### Building
+
+    To build normally
+
+    ```bash
+    make
+    ```
+
+    To build with debugging on
+
+    ```
+    make debug
+    ```
+
+    ```
+    NOTE: All the build files will be in the build folder
+    ```
+
+-   ### Running
+
+    ```bash
+    ./gSH
+    ```
+
+-   ### Cleanup
+
+    ```bash
+    make clean
+    ```
+
+## File Contents
+
+-   `globals.h`: File with global variable, structs and header files declarations.
+
+The following files are in `src` directory. The corresponding `.h` files can be found in `include` directory. `.h` files also contain brief description.
+
+-   `main.c`: File with `main()` .Calls init ,repl and destroy functions. (This file does not has a corresponding `.h` file)
+-   `parse.c`: File with functions to take raw input string and parse it. Stores `;` seperated commands in `Command` struct and collection of all commands in input string in `ParsedCommands` struct
+-   `shell.c`: File with init, repl, byebye function. This also has function to execute `ParsedCommands` using corresponding executor
+-   `prompt.c`: File with function to return prompt string.
+-   `cd.c`: File with cd command implementation and executor
+-   `echo.c`: File with echo command implementation and executor
+-   `ls.c`: File with ls command implementation and executor
+-   `mpwd.c`: File with pwd command implementation and executor
+-   `pinfo.c`: File with pinfo command implementation and executor
+-   `errorHandler.c`: File with error handlers for syscalls
+-   `history.c`: File with history command implementation and executor. This file also contains functions to add a command to history, save history and load history
+-   `sysCommand.c`: File with function for execution of non-builtin commands in foreground or background
+-   `signalHandlers.c`: File with signal handlers. For now handler only for `SIGCHLD` signal
+-   `utils.c`: File with some utility functions

src/pinfo.c

@@ -16,7 +16,6 @@ void pinfoExec(Command c)
 
 void pinfo(char *pid)
 {
-    printf("hii");
     char *procDir = (char *)malloc(MAX_LEN);
     sprintf(procDir, "/proc/%s", pid);
 
@@ -58,13 +57,15 @@ void pinfo(char *pid)
         }
         i++;
     }
+    if (getpgid(atoi(pid_)) == tcgetpgrp(0))
+        strcat(state, "+");
 
     char *executableFile = (char *)malloc(MAX_LEN);
     sprintf(executableFile, "%s/exe", procDir);
     char *exec = (char *)malloc(MAX_LEN);
     int sz = handleSyscallint(readlink(executableFile, exec, MAX_LEN - 1), "reading exectuble link");
     exec[sz] = '\0';
-
+    exec = replaceHomeDir(exec);
     // output
     printf("pid -- %s\n", pid_);
     printf("Process Status -- %s\n", state);