Re: waitpid errors with shell aliases

From: shubham sharma <shubhamsharma4060@gmail.com>
Date: Oct 25, 2022, 09:47 UTC
Message-ID: <CADUYy5sv-rc-hRB9xV2uK05k+S2G7AADiA9w6iD8pzoYMPQqGw@mail.gmail.com>
In-Reply-To: <Y1XcQctK/SkDZCbt@tapette.crustytoothpaste.net>

Hi,

/bin/sh -> GNU bash, version 5.1.4(1)-release (x86_64-pc-linux-gnu)
OS -> Arch Linux
Kernel: Linux 5.4.86-1-lts
Architecture: x86-64
git -> git version 2.30.0

Thanks, Shubham

On Mon, Oct 24, 2022 at 5:58 AM brian m. carlson <sandals@crustytoothpaste.net> wrote:

Show 47 quoted lines

>
> On 2022-10-21 at 09:26:11, shubham sharma wrote:
> > Hi,
> >
> > I am using git shell aliases in config and was facing some weird
> > error. The error is not reproducible in all runs and occurs randomly
> > between runs...consider the minimal config(alias section) below for
> > usage idea:
> >
> > [alias]
> >     A = "!f(){ \
> >         ( \
> >               // implementation
> >               git \"$1\"; \
> >         ) 250<dir/tmp; \
> >     }; f"
> >     B = "!f(){ \
> >         ssh <server> <command>; \
> >     }; f"
> >     C= "!f(){ \
> >         git A B; \
> >     }; f"
> >
> > when firing "git C" from shell,in some cases(not deterministically reproducible)
> > i observed weird waitpid errors of the type :
> >
> > error: waitpid for f(){         ssh <server> <command>;    }; f
> > failed: No child processes
> > fatal: while expanding alias 'B': 'f(){       ssh <server> <command>;
> >      }; f': No child processes
> > error: waitpid for f(){     (//implementation; git "$1"; )250<dir/tmp;
> >    }; f failed: No child processes
> > fatal: while expanding alias 'A': 'f(){        (//implementation; git
> > "$1"; )250<dir/tmp;      }; f': No child processes
> > error: waitpid for f(){    git A B;    }; f failed: No child processes
> > fatal: while expanding alias 'C': 'f(){       git A B;      }; f': No
> > child processes
> >
> > can anyone please help as to what could possibly be the reason for this?
>
> Could you tell us what OS and version of Git you're running, and what
> shell /bin/sh is?  I could imagine that there might be some weirdness on
> Windows with the shell, but I would find an ECHILD to be surprising on
> Unix.
> --
> brian m. carlson (he/him or they/them)
> Toronto, Ontario, CA