Did you try popen() ? https://stackoverflow.com/questions/43116/how-can-i-run-an-external-program-from-c-and-parse-its-output
Look the example at apps/examples/popen BR, Alan On 10/12/23, MIGUEL ALEXANDRE WISINTAINER <tcpipc...@hotmail.com> wrote: > Some idea how to capture the data returned by exec ? > > Enviado do meu iPhone > >> Em 12 de out. de 2023, à(s) 18:16, Alan C. Assis <acas...@gmail.com> >> escreveu: >> >> Hi Greg, >> >>> On 10/12/23, Gregory Nutt <spudan...@gmail.com> wrote: >>> >>>> On 10/12/2023 2:18 PM, Alan C. Assis wrote: >>>> The execv on Linux also fails when we can an builtin program, try it: >>> >>> You are right, but the semantics are really confusing. In Bash, >>> commands that are included inside of Bash are called built-in commands >>> and you cannot execute them. We ignore that naming in NuttX because it >>> onflicts with some historical naming in NuttX: >>> >>> Historically, external commands that are NOT part of NSH are called >>> built-in tasks. You can execv them if they are in binfs (only). But >>> you still can't execv the commands like ls that are a part of NSH. >>> >> >> Thanks for further explanation! >> >> Yes, the naming is confusing, but I think it is difficult to find a >> better name to those commands that are internal of nsh. At this point >> calling them built-in like in Linux will make things more confuse >> because the "external" apps are already called built-in. >> >> It is something that everyone using NuttX get grasped too fast. >> >> BR, >> >> Alan >
