started using readline library for user input

.vscode/launch.json

@@ -4,6 +4,25 @@
     // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
     "version": "0.2.0",
     "configurations": [
+        {
+            "name": "(gdb) Attach",
+            "type": "cppdbg",
+            "request": "attach",
+            "program": "${workspaceFolder}/bin/cterm",
+            "MIMode": "gdb",
+            "setupCommands": [
+                {
+                    "description": "Enable pretty-printing for gdb",
+                    "text": "-enable-pretty-printing",
+                    "ignoreFailures": true
+                },
+                {
+                    "description": "Set Disassembly Flavor to Intel",
+                    "text": "-gdb-set disassembly-flavor intel",
+                    "ignoreFailures": true
+                }
+            ]
+        },
     {
          "name": "colorwrap",
          "type": "cppdbg",

Makefile

@@ -6,13 +6,14 @@ TARGET := bin/cterm
 SRCEXT := c
 SOURCES := $(shell find $(SRCDIR) -type f -name *.$(SRCEXT))
 OBJECTS := $(patsubst $(SRCDIR)/%,$(BUILDDIR)/%,$(SOURCES:.$(SRCEXT)=.o))
-CFLAGS := -Wall
-LIB := -L lib
+CFLAGS := -Wall -lreadline
+LIB := -L lib -lreadline
 INC := -I include
 
 $(TARGET): $(OBJECTS)
 	@echo " Linking..."
 	@echo " $(CC) $^ -o $(TARGET) $(LIB)"; $(CC) $^ -o $(TARGET) $(LIB) -O3
+	@echo " Done!"
 
 $(BUILDDIR)/%.o: $(SRCDIR)/%.$(SRCEXT)
 	@echo " Building..."
@@ -28,5 +29,7 @@ test:
 
 trace:
 	strace -o $(TESTDIR)/trace.lp $(TARGET) /bin/sh
+tracef:
+	strace -fo $(TESTDIR)/trace.lp $(TARGET) /bin/sh
 
 .PHONY: clean

README.md

@@ -8,6 +8,9 @@ Project image/gif
 
 Requirements
 
+RHEL-like:
+`sudo dnf install readline-devel`
+
 ## Installation
 
 `make`
@@ -16,6 +19,13 @@ Requirements
 
 `bin/run`
 
+## Considerations and Caveats
+
+Since this program buffers input by line, It will not handle TUI-based commands
+    Examples include less and vim
+
+If you need to use these kinds of applications, do not use this program to wrap your shell.
+
 ## Example
 
 `bin/run`

src/main.c

@@ -6,8 +6,10 @@
 #include <sys/wait.h>
 #include <sys/types.h>
 #include <pty.h>
-#include <fcntl.h>
 #include <sysexits.h>
+#include <fcntl.h>
+#include <readline/readline.h>
+#include <readline/history.h>
 
 #define BUFCHUNKSIZE 4096
 #define BUFSAFEPAD 8
@@ -25,6 +27,25 @@ void child_process(char *argv[]){
 }
 
 
+size_t getuserinput(char* input_buffer, size_t max_buffer_size, int fd) {
+	int in_char;
+	size_t total_read_length;
+	ssize_t read_result;
+	//read_result = read(fd, &in_char, 1);
+	while (1) {
+		printf("reading char\n");
+		in_char = fgetc(stdin);
+		printf("read char\n");
+	}
+	//if (inchar < 0){
+	//	//error condition
+	//	exit(1);
+	//}
+	return 1;
+}
+
+
+
 int main(int argc, char *argv[]) {
 	int master;
 	pid_t child_pid;
@@ -58,22 +79,24 @@ int main(int argc, char *argv[]) {
 		//	  ideally I would want to read from the pipe and buffer the output, rewriting the line on change
 		//	  whenever it sees a newline, it should send it to the processor and print to stdout, with that newline
 		//	  
+		memset(childoutbuffer, 0, BUFCHUNKSIZE);
 		while(1){
 			ssize_t count = read(master, childoutbuffer, BUFCHUNKSIZE);
 			if (count == -1){
 				if(errno == EAGAIN){
 					break;
-				} else exit(1);
+				} else exit(0);
 			} else if (count == 0 ){
 				exit(0);
 			}
 			write(STDOUT_FILENO, childoutbuffer, count);
 		}
 		memset(childoutbuffer, 0, BUFCHUNKSIZE);
-		fgets(childoutbuffer, BUFCHUNKSIZE, stdin);
+		strncpy(childoutbuffer, readline("~>"), BUFCHUNKSIZE-1);
 		
 		//printf("%s\n", childoutbuffer);
 		write(master, childoutbuffer, strlen(childoutbuffer));
+		write(master, "\n", 1);
 
 		//memset(childoutbuffer, 0, BUFCHUNKSIZE);
 		//ssize_t count = strlen(childoutbuffer);