On 13/04/2023 17.07, Peter Maydell wrote:
Our 'file' chardev backend supports both "output from this chardev
is written to a file" and "input from this chardev should be read
from a file" (except on Windows). However, you can only set up
the input file if you're using the QMP interface -- there is no
command line syntax to do it.
Add command line syntax to allow specifying an input file
as well as an output file, using a new 'input-path' suboption.
The specific use case I have is that I'd like to be able to
feed fuzzer reproducer input into qtest without having to use
'-qtest stdio' and put the input onto stdin. Being able to
use a file chardev like this:
-chardev file,id=repro,path=/dev/null,input-path=repro.txt -qtest
chardev:repro
means that stdio is free for use by gdb.
Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
---
...
diff --git a/qemu-options.hx b/qemu-options.hx
index 59bdf67a2c5..31d08c60264 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -3360,7 +3360,7 @@ DEF("chardev", HAS_ARG, QEMU_OPTION_chardev,
"-chardev
vc,id=id[[,width=width][,height=height]][[,cols=cols][,rows=rows]]\n"
" [,mux=on|off][,logfile=PATH][,logappend=on|off]\n"
"-chardev ringbuf,id=id[,size=size][,logfile=PATH][,logappend=on|off]\n"
- "-chardev
file,id=id,path=path[,mux=on|off][,logfile=PATH][,logappend=on|off]\n"
+ "-chardev
file,id=id,path=path[,input-file=input-file][,mux=on|off][,logfile=PATH][,logappend=on|off]\n"
s/input-file=/input-path=/
Thomas
