fix seg fault on prompt

color.c

@@ -5,7 +5,7 @@
 #include "rush.h"
 
 // color str in place
-void color_text(char str[], const char *color) {
+char *color_text(char *str, const char *color) {
     int size = snprintf(NULL, 0, "\x1b[38;2;%sm%s\x1b[0m", color, str) + 1; // calculate size that is needed for colored string
     if (size < 0) {
         fprintf(stderr, "rush: snprintf failed\n");
@@ -14,6 +14,5 @@ void color_text(char str[], const char *color) {
     char *buf = memalloc(size);
 
     snprintf(buf, size, "\x1b[38;2;%sm%s\x1b[0m", color, str); // format string to buf
-    strcpy(str, buf);
-    free(buf);
+    return buf;
 }

color.h

@@ -5,6 +5,6 @@ const char *lavender = "174;174;255";
 const char *pink = "255;210;239";
 const char *blue = "137;180;250";
 
-void color_text(char str[], const char *color);
+char *color_text(char str[], const char *color);
 
 #endif

rush.c

@@ -23,10 +23,6 @@ void *memalloc(size_t size) {
     return ptr;
 }
 
-void quit_sig(int sig) {
-    exit(0);
-}
-
 void change_terminal_attribute(int option) {  
     static struct termios oldt, newt;
     tcgetattr(STDIN_FILENO, &oldt);
@@ -168,7 +164,7 @@ char *readline(char **paths) {
             case 10: {
                 // enter/new line feed
                 if (buf_len == 0) {
-                    break;
+                    return NULL;
                 }
                 // check if command includes !!
                 if (strstr(buffer, "!!") != NULL) {
@@ -450,16 +446,23 @@ void command_loop(char **paths) {
         }
         char time[256];
         strcpy(time, timestr);
-        color_text(time, lavender); // lavender colored time string
+        char *modtime = memalloc(sizeof(char) * 256);
+        modtime = color_text(time, lavender); // lavender colored time string
         char *cwd = memalloc(sizeof(char) * (PATH_MAX + 2));
         sprintf(cwd, "[%s]", cwdstr);
-        color_text(cwd, pink); // pink colored current directory
-        char arrow[32] = "»";
-        color_text(arrow, blue);
-        printf("%s %s %s ", time, cwd, arrow);
+        cwd = replace_absolute_home(cwd);
+        cwd = color_text(cwd, pink); // pink colored current directory
+        char *arrow = memalloc(sizeof(char) * 32);
+        strcpy(arrow, "»");
+        arrow = color_text(arrow, blue);
+        printf("%s %s %s ", modtime, cwd, arrow);
 
         cmd_count = 0; // upward arrow key resets command count
         line = readline(paths);
+        if (line == NULL) {
+            printf("\n");
+            continue;
+        }
         save_command_history(line);
         bool has_pipe = false;
         for (int i = 0; line[i] != '\0'; i++) {
@@ -482,10 +485,16 @@ void command_loop(char **paths) {
             free(args);
         }
         free(line);
+        free(modtime);
         free(cwd);
+        free(arrow);
     };
 }
 
+void quit_sig(int sig) {
+    exit(EXIT_SUCCESS);
+}
+
 int main(int argc, char **argv) {
     // setup
     signal(SIGINT, quit_sig);