I can't get gdb to redirect a file to the stdin of my program.
Outside of gdb ./prog.x < someinput.txt does exactly what I want.
Inside gdb, when I run (gdb) run < someinput.txt my program doesn't seem to "see" the input file, and instead stdin seems to be reading what I type into the console.
(gdb) run < testinput.txt
Starting program: /Users/alexpatch/Documents/krc/misc/sandbox.x < testinput.txt
[New Thread 0x1603 of process 8308]
My cursor appears on a blank line beneath that, where I can type some text. C-d breaks out of that, then the output of the program run with what I just typed appears, and the process exits normally.
/* trivial code example */
#include <stdio.h>
int main(void)
{
int c;
while ((c = getchar()) != EOF)
putchar(c);
return 0;
}
I found a few answers related to similar issues, but the solution that seemed to work for them was what I'm already doing, namely (gdb) run < someinput.txt. In case it's helpful, I'm working on a 64bit MacBook Air running macOS Sierra.
