I want to ask the user to select their USB drive by typing the mount location. For some reason that does not work and just skips over the user input part.

void writeusb() {
	writeln("Here is a list of your mounted drives: ");
	auto mounts = executeShell("cat /proc/mounts | grep media");
	writeln(mounts.output);
	writef("Type the path to your USB drive: ");
	string cont = readln;
	writeln(a);
	writeln("A file selection menu will now appear so you can select an ISO to write.");
	auto seliso = executeShell("zenity --file-selection");
	writeln(seliso.output);
}

I am clueless as to what I need to do here? Can anyone help?

On Sunday, 15 May 2022 at 11:10:41 UTC, SvGaming wrote:

void writeusb() {
	writeln("Here is a list of your mounted drives: ");
	auto mounts = executeShell("cat /proc/mounts | grep media");
	writeln(mounts.output);
	writef("Type the path to your USB drive: ");
	string cont = readln;
	writeln(a);
	writeln("A file selection menu will now appear so you can select an ISO to write.");
	auto seliso = executeShell("zenity --file-selection");
	writeln(seliso.output);
}

import std.stdio;
import std.process;

int main ()
{
   writeln("Here is a list of your mounted drives: ");
   auto mounts = executeShell("cat /proc/mounts | grep media");
   writeln(mounts.output);
   writef("Type the path to your USB drive: ");
   string cont = readln;
   writeln(cont); // there was no variable named "a"
   writeln("A file selection menu will now appear so you can select an ISO to write.");
//   auto seliso = executeShell("zenity --file-selection");
//   writeln(seliso.output);
   return 0;
}

This code runs as expected.

On Sunday, 15 May 2022 at 11:10:41 UTC, SvGaming wrote:

void writeusb() {
	writeln("Here is a list of your mounted drives: ");
	auto mounts = executeShell("cat /proc/mounts | grep media");
	writeln(mounts.output);
	writef("Type the path to your USB drive: ");
	string cont = readln;
	writeln(a);
	writeln("A file selection menu will now appear so you can select an ISO to write.");
	auto seliso = executeShell("zenity --file-selection");
	writeln(seliso.output);
}

Just noticed i forgot to put the proper variable name to the input. Should not matter though. Also when I change it nothing changes.

On Sunday, 15 May 2022 at 12:13:14 UTC, kdevel wrote:

import std.stdio;
import std.process;

int main ()
{
   writeln("Here is a list of your mounted drives: ");
   auto mounts = executeShell("cat /proc/mounts | grep media");
   writeln(mounts.output);
   writef("Type the path to your USB drive: ");
   string cont = readln;
   writeln(cont); // there was no variable named "a"
   writeln("A file selection menu will now appear so you can select an ISO to write.");
//   auto seliso = executeShell("zenity --file-selection");
//   writeln(seliso.output);
   return 0;
}

Strange. It does not for me. I even tried different compilers.
It simply does not ask for user input here where it is supposed to:

writef("Type the path to your USB drive: ");
string cont = readln;
writeln(cont); // there was no variable named "a"

On Sunday, 15 May 2022 at 12:19:22 UTC, SvGaming wrote:
[...]

writef("Type the path to your USB drive: ");
string cont = readln;
writeln(cont); // there was no variable named "a"

Install the strace program (I assume you are running Linux) and start your program under strace:

   $ strace -f <name of the executable>

Then examine the system calls. On my machine I get this:

[...]
mmap(NULL, 4194304, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ffff6beb000
read(4, "", 4096)                       = 0
--- SIGCHLD (Child exited) @ 0 (0) ---
read(4, "", 4096)                       = 0
wait4(26713, [{WIFEXITED(s) && WEXITSTATUS(s) == 1}], 0, NULL) = 26713
close(4)                                = 0
munmap(0x7ffff7ff5000, 4096)            = 0
write(1, "\n", 1
)                       = 1
fstat(0, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 10), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ffff7ff5000
write(1, "Type the path to your USB drive:"..., 33Type the path to your USB drive: ) = 33
read(0,

Here the program waits for input.

On Sunday, 15 May 2022 at 12:27:45 UTC, kdevel wrote:

I am so confused right now. It works if that code is the main function.
But in the full program that is only one of the functions and is not the main function.

On Sunday, 15 May 2022 at 15:27:32 UTC, SvGaming wrote:
[...]

Until you post your full programm ideally in a reduced form [1] everybody who is willing to help must guess wildly what the unposted parts of your program does and how it may cause the read to be seemingly skipped.

import std.stdio;
import std.process;

void foo ()
{
   writeln("Here is a list of your mounted drives: ");
   auto mounts = executeShell("cat /proc/mounts | grep media");
   writeln(mounts.output);
   writef("Type the path to your USB drive: ");
   string cont = readln;
   writeln(cont); // there was no variable named "a"
   writeln("A file selection menu will now appear so you can select an ISO to write.");
//   auto seliso = executeShell("zenity --file-selection");
//   writeln(seliso.output);
}

int main ()
{
   foo;
   return 0;
}

Also works as expected.

What does strace report? And what compiler/version do you use?

[1] https://stackoverflow.com/help/minimal-reproducible-example

On Sunday, 15 May 2022 at 20:06:20 UTC, kdevel wrote:

I use dmd but I tried befor with another compiler and got the same result. Not sure if it was GDC or LDC.

On Monday, 16 May 2022 at 16:40:59 UTC, SvGaming wrote: