In the Terminal, I have:
myapp < myfileinput
But if I want to use gdb,
gdb myapp < myfileinput
It didn't run correctly.
How to use gdb here?
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Possible duplicate of How to load program reading stdin and taking parameters in gdb?Ciro Santilli OurBigBook.com– Ciro Santilli OurBigBook.com2017-04-23 06:33:56 +00:00Commented Apr 23, 2017 at 6:33
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4 Answers
~$ gdb <executable>
GNU gdb (Ubuntu/Linaro 7.3-0ubuntu2) 7.3-2011.08
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-linux-gnu".
For bug reporting instructions, please see:
<http://bugs.launchpad.net/gdb-linaro/>...
Reading symbols from /home/abhishek/maxtest...done.
(gdb) run < input.txt
This is doing the trick for me. Wondering if this was what you were looking for.
3 Comments
user2284570
Christopher Schultz
Also works with
start < inputfile if you want to start debugging at the beginning of main().
Ismail Ramzan
For multiple inputs, U can separate the inputs with new line in the input.txt.
Try running your application from within gdb?
(gdb) file /usr/bin/head
Reading symbols from /usr/bin/head...(no debugging symbols found)...done.
(gdb) run -2 < /etc/passwd
Starting program: /usr/bin/head -2 < /etc/passwd
root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/bin/sh
Program exited normally.
(gdb)
EDIT: Alternatively:
gdb -q -ex 'set args -2 < /etc/passwd' /usr/bin/head
Reading symbols from /usr/bin/head...done.
(gdb) run
root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/bin/sh
Program exited normally.
(gdb) quit
You can try the following:
(gdb) run < input.txt
1 Comment
user2284570
Another alternative seems to be:
$ gdb /usr/bin/head
(gdb) set args `cat /etc/passwd`
(gdb) run
