In <4d9c342a.1090...@shadowcat.co.uk>, Chris Jackson wrote: >Boyd Stephen Smith Jr. wrote: >> GNU time 1.7 >> bss@dellbuntu:~$ type time >> time is a shell keyword >> >> (Bash has a time "builtin" that you should avoid if you want to use the >> time binary.) > >Actually it's a keyword not a builtin.
That's why I used quotes. For most purposes it can be treated like a shell builtin, but it's not really one. Shell keywords are part of it's parser syntax, and may or may not be valid/recognized everywhere a command. Shell builtins are not part of the parser syntax, but are simply "found" before any binary in the PATH. Shell special builtins modify properties of the shell process, so they can't be simply executed by fork/exec and are allowed to exit the shell in certain failure cases. In this particular case, "time" isn't recognized as a keyword except as the first part of a pipeline. When it is not recognized as a keyword, the time binary is used: bss@monster:~$ time echo | time --version GNU time 1.7 real 0m0.002s user 0m0.000s sys 0m0.000s bss@monster:~$ # or even ... bss@monster:~$ time time --version GNU time 1.7 real 0m0.002s user 0m0.000s sys 0m0.000s -- Boyd Stephen Smith Jr. ,= ,-_-. =. b...@iguanasuicide.net ((_/)o o(\_)) ICQ: 514984 YM/AIM: DaTwinkDaddy `-'(. .)`-' http://iguanasuicide.net/ \_/
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