On Thu, Jan 02, 2014 at 09:12:38PM -0500, Peter Schaffter wrote: > On Thu, Jan 02, 2014, Mike Bianchi wrote: > > How is someone attempting to understand a #!/bin/sh script to know what > > the > > writer intended if there is no documented way to interpret the syntax? > > #!/bin/sh > # This script is written for the bash shell. See bash(1). > > Or is that just too obvious?
It's incorrect. If you're writing a script for the bash shell, then all you need to do is use #!/bin/bash and then you'll be sure you're running the script under the correct shell. Given that /bin/sh isn't guaranteed to be bash (and on many systems, is indeed not bash), it will break on these systems. If you use "#!/bin/sh" you do need to restrict yourself to POSIX sh features. But if you want more features of a particular shell, then you just need to use that shell explicitly. Regards, Roger -- .''`. Roger Leigh : :' : Debian GNU/Linux http://people.debian.org/~rleigh/ `. `' Printing on GNU/Linux? http://gutenprint.sourceforge.net/ `- GPG Public Key: 0x25BFB848 Please GPG sign your mail.
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