Using c++, write pdf file and open it by Preview app in osx

Question

1. Wrote the .pdf file to the disk by using fopen and fwrite.

   FILE * fp = fopen("/Users/test/Documents/1.pdf", "w+");
   if (fp) {
       fwrite(pdf_data, size_of_pdf_data, 1, fp);
       fclose(fp);
   }  
   

2. And then open 1.pdf within Preview.app by using applescript.

   system("osascript -e \'tell app \"Preview\" to open \"/Users/test/Documents/1.pdf\"");
   

3. when the system function executes, the file permission issue occurred like the following image:

File Permission Issue

How can I fix this issue? I am using macOS Catalina 10.15.7 and xcode 11.3.1.

Answer 1

AppleScript is 100% completely the wrong tool for this job.

Were you in ObjC you’d use NSWorkspace. Since you’re in C[++], use LaunchServices’ LSOpenFromURLSpec.