On Fri, 6 Nov 2015 08:26:25 -0800 (PST) Wink Saville <w...@saville.com> wrote:
> git config alias.sdiff '!'"git diff && git submodule foreach 'git > diff'" [...] > Thus, the alias.sdiff makes sense, but is there documentation on the > return values? I don't think these return values are documented but it's just the ages-old standard POSIX convention that the exit code 0 of a program indicates success while any code in range 1..127 indicates failure (a code > 127 usually means that the program has been killed by an OS signal it failed to catch and process -- such as SIGFAULT or SIGILL -- see man signal(7)). Hence it's customary to just distinguish between the zero and non-zero exit codes, and the && and || POSIX shell operators do just that: && does only execute the following command if the preceding one exited OK (returned 0) and || does only execute the following command if the preceding one exited signalizing a failure (non-zero). For more info see the sections "AND lists" and "OR lists" in [1]. P.S. Please fix your terminology. ;-) "bash true" is a bit of a nonsense as exit codes are not specific to shells -- they are a property of the process execution model implemented by an OS (and mandated by the POSIX standard). And surely any POSIX-compatible (in fact, any Unix-y) shell treats 0 and non-0 in the same way. 1. http://pubs.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html -- You received this message because you are subscribed to the Google Groups "Git for human beings" group. To unsubscribe from this group and stop receiving emails from it, send an email to git-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
