CE edit command

ce/interp.c

@@ -1,12 +1,14 @@
 #include "interp.h"
 #include "arena_alloc.h"
 #include "context.h"
+#include "edit.h"
 #include "parser.h"
 #include "self.h"
 #include <desc.h>
 #include <filereader.h>
 #include <filewriter.h>
 #include <kb.h>
+#include <liballoc.h>
 #include <path.h>
 #include <process.h>
 #include <stddef.h>
@@ -189,6 +191,48 @@ static void ls (struct context* context, const char* path_string) {
   volume_close ();
 }
 
+static void edit (struct context* context, const char* path_string) {
+  struct desc desc;
+  char volume[VOLUME_MAX];
+  const char* path;
+  int ret;
+
+  if (!path_parse (path_string, volume, &path)) {
+    cprintf (context, "ERROR bad path '%s'\n", path_string);
+    return;
+  }
+
+  if ((ret = volume_open (volume)) < 0) {
+    cprintf (context, "ERROR could not open volume '%s': %s\n", volume, str_status[-ret]);
+    return;
+  }
+
+  if ((ret = describe (path, &desc)) < 0) {
+    cprintf (context, "ERROR could not describe '%s': %s\n", path, str_status[-ret]);
+    volume_close ();
+    return;
+  }
+
+  char* str = malloc (desc.size + 1);
+
+  if (str == NULL) {
+    volume_close ();
+    return;
+  }
+
+  memset (str, 0, desc.size);
+
+  if ((ret = read_file (path, 0, (uint8_t*)str, desc.size)) < 0) {
+    free (str);
+    volume_close ();
+    return;
+  }
+
+  edit_start (str);
+
+  volume_close ();
+}
+
 static void quit1 (struct context* context) {
   cprintf (context, "Goodbye!\n");
   interp_shutdown ();
@@ -203,6 +247,7 @@ static void help (struct context* context) {
   cprintf (context, "mkfile       <file path>\n");
   cprintf (context, "mkdir        <directory path>\n");
   cprintf (context, "rm           <path>\n");
+  cprintf (context, "edit         <path>\n");
   cprintf (context, "quit\n");
 }
 
@@ -239,6 +284,8 @@ static void execute_cmd (struct ast_cmd* cmd, struct context* context) {
     mkdir (context, cmd->args, cmd->arg_count);
   } else if (strcmp (cmd->name, "rm") == 0) {
     rm (context, cmd->args, cmd->arg_count);
+  } else if (strcmp (cmd->name, "edit") == 0) {
+    edit (context, cmd->args[0]);
   } else {
     char volume[VOLUME_MAX];
     const char* path;