David Bremner venit, vidit, dixit 2022-02-20 00:02:40: > Tomi Ollila <tomi.oll...@iki.fi> writes: > > > > > Wat? afaik echo is builtin in every modern bourne shell derivative... > > > > (I tested: > > $ bash -c 'builtin echo foo' > > foo > > $ bash -c 'export PATH=/tmp; echo foo; ls' > > foo > > bash: ls: command not found > > ) > > Oops. That's what I get for believing "which". Which is another tale of > woe, of course. Builtin in zsh, and not in bash. Not that it matters > here, but probably why it doesn't know about bash builtins.
echo is both a builtin (for bash etc) and a command: $ type echo echo is a shell builtin $ which echo /usr/bin/echo The latter is part of GNU coreutils (sh-utils) and often used when one wants to avoid shell pecularities. printf is a builtin Due to the way the builtins were specified (or underspecified in the case of echo) in POSIX, the printf builtin is more portable than the echo builtin. As a rule of thumb, the echo builtin is OK if you don't need options (nor special control sequences) but want a newline at the end of the output anyways; use printf if you need options or format strings. Alternatively, require GNU coreutils and use /usr/bin/echo. Cheers Michael P.S.: I haven't forgotten about the series but it needs quite a bit of rework as we found out. _______________________________________________ notmuch mailing list -- notmuch@notmuchmail.org To unsubscribe send an email to notmuch-le...@notmuchmail.org
